mirror of
https://github.com/flutter/flutter.git
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833 lines
30 KiB
Java
833 lines
30 KiB
Java
// Copyright 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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package io.flutter.view;
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import android.app.Activity;
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import android.content.BroadcastReceiver;
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import android.content.Context;
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import android.content.Intent;
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import android.content.IntentFilter;
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import android.content.pm.ApplicationInfo;
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import android.content.res.Configuration;
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import android.graphics.Bitmap;
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import android.graphics.Rect;
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import android.os.Build;
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import android.util.AttributeSet;
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import android.util.Log;
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import android.util.TypedValue;
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import android.view.KeyEvent;
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import android.view.MotionEvent;
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import android.view.Surface;
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import android.view.SurfaceHolder;
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import android.view.SurfaceView;
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import android.view.WindowInsets;
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import android.view.accessibility.AccessibilityManager;
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import android.view.accessibility.AccessibilityNodeProvider;
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import android.view.inputmethod.EditorInfo;
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import android.view.inputmethod.InputConnection;
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import io.flutter.plugin.common.ActivityLifecycleListener;
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import io.flutter.plugin.common.FlutterMessageChannel;
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import io.flutter.plugin.common.FlutterMethodChannel;
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import io.flutter.plugin.common.JSONMessageCodec;
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import io.flutter.plugin.common.JSONMethodCodec;
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import io.flutter.plugin.common.StringCodec;
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import io.flutter.plugin.editing.TextInputPlugin;
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import io.flutter.plugin.platform.PlatformPlugin;
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import org.json.JSONException;
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import org.json.JSONObject;
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import java.net.URI;
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import java.nio.ByteBuffer;
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import java.nio.ByteOrder;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Locale;
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import java.util.Map;
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/**
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* An Android view containing a Flutter app.
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*/
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public class FlutterView extends SurfaceView
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implements AccessibilityManager.AccessibilityStateChangeListener {
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private static final String TAG = "FlutterView";
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private static final String ACTION_DISCOVER = "io.flutter.view.DISCOVER";
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static final class ViewportMetrics {
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float devicePixelRatio = 1.0f;
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int physicalWidth = 0;
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int physicalHeight = 0;
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int physicalPaddingTop = 0;
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int physicalPaddingRight = 0;
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int physicalPaddingBottom = 0;
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int physicalPaddingLeft = 0;
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}
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private final TextInputPlugin mTextInputPlugin;
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private final Map<String, OnBinaryMessageListenerAsync> mMessageListeners;
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private final SurfaceHolder.Callback mSurfaceCallback;
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private final ViewportMetrics mMetrics;
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private final AccessibilityManager mAccessibilityManager;
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private final FlutterMethodChannel mFlutterLocalizationChannel;
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private final FlutterMethodChannel mFlutterNavigationChannel;
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private final FlutterMessageChannel<Object> mFlutterKeyEventChannel;
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private final FlutterMessageChannel<String> mFlutterLifecycleChannel;
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private final FlutterMessageChannel<Object> mFlutterSystemChannel;
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private final BroadcastReceiver mDiscoveryReceiver;
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private final List<ActivityLifecycleListener> mActivityLifecycleListeners;
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private long mNativePlatformView;
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public FlutterView(Context context) {
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this(context, null);
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}
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public FlutterView(Context context, AttributeSet attrs) {
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super(context, attrs);
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mMetrics = new ViewportMetrics();
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mMetrics.devicePixelRatio = context.getResources().getDisplayMetrics().density;
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setFocusable(true);
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setFocusableInTouchMode(true);
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attach();
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assert mNativePlatformView != 0;
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int color = 0xFF000000;
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TypedValue typedValue = new TypedValue();
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context.getTheme().resolveAttribute(android.R.attr.colorBackground, typedValue, true);
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if (typedValue.type >= TypedValue.TYPE_FIRST_COLOR_INT
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&& typedValue.type <= TypedValue.TYPE_LAST_COLOR_INT) {
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color = typedValue.data;
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}
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// TODO(abarth): Consider letting the developer override this color.
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final int backgroundColor = color;
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mSurfaceCallback = new SurfaceHolder.Callback() {
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@Override
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public void surfaceCreated(SurfaceHolder holder) {
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assert mNativePlatformView != 0;
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nativeSurfaceCreated(mNativePlatformView, holder.getSurface(), backgroundColor);
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}
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@Override
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public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
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assert mNativePlatformView != 0;
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nativeSurfaceChanged(mNativePlatformView, width, height);
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}
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@Override
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public void surfaceDestroyed(SurfaceHolder holder) {
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assert mNativePlatformView != 0;
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nativeSurfaceDestroyed(mNativePlatformView);
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}
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};
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getHolder().addCallback(mSurfaceCallback);
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mAccessibilityManager = (AccessibilityManager) getContext()
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.getSystemService(Context.ACCESSIBILITY_SERVICE);
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mMessageListeners = new HashMap<>();
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mActivityLifecycleListeners = new ArrayList<>();
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// Configure the platform plugins and flutter channels.
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mFlutterLocalizationChannel = new FlutterMethodChannel(this, "flutter/localization",
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JSONMethodCodec.INSTANCE);
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mFlutterNavigationChannel = new FlutterMethodChannel(this, "flutter/navigation",
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JSONMethodCodec.INSTANCE);
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mFlutterKeyEventChannel = new FlutterMessageChannel<>(this, "flutter/keyevent",
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JSONMessageCodec.INSTANCE);
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mFlutterLifecycleChannel = new FlutterMessageChannel<>(this, "flutter/lifecycle",
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StringCodec.INSTANCE);
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mFlutterSystemChannel = new FlutterMessageChannel<>(this, "flutter/system",
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JSONMessageCodec.INSTANCE);
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PlatformPlugin platformPlugin = new PlatformPlugin((Activity) getContext());
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FlutterMethodChannel flutterPlatformChannel = new FlutterMethodChannel(this,
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"flutter/platform", JSONMethodCodec.INSTANCE);
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flutterPlatformChannel.setMethodCallHandler(platformPlugin);
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addActivityLifecycleListener(platformPlugin);
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mTextInputPlugin = new TextInputPlugin((Activity) getContext(), this);
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setLocale(getResources().getConfiguration().locale);
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if ((context.getApplicationInfo().flags & ApplicationInfo.FLAG_DEBUGGABLE) != 0) {
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mDiscoveryReceiver = new DiscoveryReceiver();
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context.registerReceiver(mDiscoveryReceiver, new IntentFilter(ACTION_DISCOVER));
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} else {
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mDiscoveryReceiver = null;
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}
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}
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private void encodeKeyEvent(KeyEvent event, Map<String, Object> message) {
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message.put("flags", event.getFlags());
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message.put("codePoint", event.getUnicodeChar());
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message.put("keyCode", event.getKeyCode());
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message.put("scanCode", event.getScanCode());
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message.put("metaState", event.getMetaState());
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}
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@Override
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public boolean onKeyUp(int keyCode, KeyEvent event) {
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if (!isAttached()) {
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return super.onKeyUp(keyCode, event);
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}
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Map<String, Object> message = new HashMap<>();
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message.put("type", "keyup");
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message.put("keymap", "android");
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encodeKeyEvent(event, message);
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mFlutterKeyEventChannel.send(message);
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return super.onKeyUp(keyCode, event);
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}
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@Override
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public boolean onKeyDown(int keyCode, KeyEvent event) {
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if (!isAttached()) {
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return super.onKeyDown(keyCode, event);
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}
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Map<String, Object> message = new HashMap<>();
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message.put("type", "keydown");
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message.put("keymap", "android");
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encodeKeyEvent(event, message);
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mFlutterKeyEventChannel.send(message);
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return super.onKeyDown(keyCode, event);
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}
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public void addActivityLifecycleListener(ActivityLifecycleListener listener) {
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mActivityLifecycleListeners.add(listener);
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}
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public void onPause() {
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mFlutterLifecycleChannel.send("AppLifecycleState.paused");
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}
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public void onPostResume() {
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for (ActivityLifecycleListener listener : mActivityLifecycleListeners) {
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listener.onPostResume();
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}
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mFlutterLifecycleChannel.send("AppLifecycleState.resumed");
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}
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public void onMemoryPressure() {
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Map<String, Object> message = new HashMap<>(1);
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message.put("type", "memoryPressure");
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mFlutterSystemChannel.send(message);
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}
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public void pushRoute(String route) {
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mFlutterNavigationChannel.invokeMethod("pushRoute", route);
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}
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public void popRoute() {
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mFlutterNavigationChannel.invokeMethod("popRoute", null);
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}
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private void setLocale(Locale locale) {
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mFlutterLocalizationChannel.invokeMethod("setLocale",
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Arrays.asList(locale.getLanguage(), locale.getCountry()));
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}
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@Override
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protected void onConfigurationChanged(Configuration newConfig) {
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super.onConfigurationChanged(newConfig);
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setLocale(newConfig.locale);
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}
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float getDevicePixelRatio() {
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return mMetrics.devicePixelRatio;
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}
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public void destroy() {
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if (mDiscoveryReceiver != null) {
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getContext().unregisterReceiver(mDiscoveryReceiver);
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}
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getHolder().removeCallback(mSurfaceCallback);
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nativeDetach(mNativePlatformView);
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mNativePlatformView = 0;
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}
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@Override
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public InputConnection onCreateInputConnection(EditorInfo outAttrs) {
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try {
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return mTextInputPlugin.createInputConnection(this, outAttrs);
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} catch (JSONException e) {
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Log.e(TAG, "Failed to create input connection", e);
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return null;
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}
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}
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// Must match the PointerChange enum in pointer.dart.
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private static final int kPointerChangeCancel = 0;
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private static final int kPointerChangeAdd = 1;
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private static final int kPointerChangeRemove = 2;
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private static final int kPointerChangeHover = 3;
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private static final int kPointerChangeDown = 4;
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private static final int kPointerChangeMove = 5;
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private static final int kPointerChangeUp = 6;
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// Must match the PointerDeviceKind enum in pointer.dart.
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private static final int kPointerDeviceKindTouch = 0;
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private static final int kPointerDeviceKindMouse = 1;
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private static final int kPointerDeviceKindStylus = 2;
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private static final int kPointerDeviceKindInvertedStylus = 3;
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private int getPointerChangeForAction(int maskedAction) {
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// Primary pointer:
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if (maskedAction == MotionEvent.ACTION_DOWN) {
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return kPointerChangeDown;
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}
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if (maskedAction == MotionEvent.ACTION_UP) {
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return kPointerChangeUp;
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}
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// Secondary pointer:
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if (maskedAction == MotionEvent.ACTION_POINTER_DOWN) {
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return kPointerChangeDown;
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}
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if (maskedAction == MotionEvent.ACTION_POINTER_UP) {
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return kPointerChangeUp;
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}
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// All pointers:
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if (maskedAction == MotionEvent.ACTION_MOVE) {
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return kPointerChangeMove;
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}
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if (maskedAction == MotionEvent.ACTION_CANCEL) {
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return kPointerChangeCancel;
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}
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return -1;
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}
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private int getPointerDeviceTypeForToolType(int toolType) {
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switch (toolType) {
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case MotionEvent.TOOL_TYPE_FINGER:
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return kPointerDeviceKindTouch;
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case MotionEvent.TOOL_TYPE_STYLUS:
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return kPointerDeviceKindStylus;
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case MotionEvent.TOOL_TYPE_MOUSE:
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return kPointerDeviceKindMouse;
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default:
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// MotionEvent.TOOL_TYPE_UNKNOWN will reach here.
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return -1;
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}
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}
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private void addPointerForIndex(MotionEvent event, int pointerIndex,
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ByteBuffer packet) {
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int pointerChange = getPointerChangeForAction(event.getActionMasked());
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if (pointerChange == -1) {
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return;
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}
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int pointerKind = event.getToolType(pointerIndex);
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if (pointerKind == -1) {
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return;
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}
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long timeStamp = event.getEventTime() * 1000; // Convert from milliseconds to microseconds.
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packet.putLong(timeStamp); // time_stamp
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packet.putLong(pointerChange); // change
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packet.putLong(pointerKind); // kind
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packet.putLong(event.getPointerId(pointerIndex)); // device
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packet.putDouble(event.getX(pointerIndex)); // physical_x
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packet.putDouble(event.getY(pointerIndex)); // physical_y
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if (pointerKind == kPointerDeviceKindMouse) {
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packet.putLong(event.getButtonState() & 0x1F); // buttons
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} else if (pointerKind == kPointerDeviceKindStylus) {
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packet.putLong((event.getButtonState() >> 4) & 0xF); // buttons
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} else {
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packet.putLong(0); // buttons
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}
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packet.putLong(0); // obscured
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// TODO(eseidel): Could get the calibrated range if necessary:
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// event.getDevice().getMotionRange(MotionEvent.AXIS_PRESSURE)
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packet.putDouble(event.getPressure(pointerIndex)); // pressure
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packet.putDouble(0.0); // pressure_min
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packet.putDouble(1.0); // pressure_max
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if (pointerKind == kPointerDeviceKindStylus) {
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packet
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.putDouble(event.getAxisValue(MotionEvent.AXIS_DISTANCE, pointerIndex)); // distance
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packet.putDouble(0.0); // distance_max
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} else {
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packet.putDouble(0.0); // distance
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packet.putDouble(0.0); // distance_max
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}
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packet.putDouble(event.getToolMajor(pointerIndex)); // radius_major
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packet.putDouble(event.getToolMinor(pointerIndex)); // radius_minor
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packet.putDouble(0.0); // radius_min
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packet.putDouble(0.0); // radius_max
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packet.putDouble(
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event.getAxisValue(MotionEvent.AXIS_ORIENTATION, pointerIndex)); // orientation
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if (pointerKind == kPointerDeviceKindStylus) {
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packet.putDouble(event.getAxisValue(MotionEvent.AXIS_TILT, pointerIndex)); // tilt
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} else {
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packet.putDouble(0.0); // tilt
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}
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}
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@Override
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public boolean onTouchEvent(MotionEvent event) {
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if (!isAttached()) {
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return false;
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}
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// TODO(abarth): This version check might not be effective in some
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// versions of Android that statically compile code and will be upset
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// at the lack of |requestUnbufferedDispatch|. Instead, we should factor
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// version-dependent code into separate classes for each supported
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// version and dispatch dynamically.
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
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requestUnbufferedDispatch(event);
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}
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// These values must match the unpacking code in hooks.dart.
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final int kPointerDataFieldCount = 19;
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final int kBytePerField = 8;
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int pointerCount = event.getPointerCount();
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ByteBuffer packet = ByteBuffer
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.allocateDirect(pointerCount * kPointerDataFieldCount * kBytePerField);
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packet.order(ByteOrder.LITTLE_ENDIAN);
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int maskedAction = event.getActionMasked();
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// ACTION_UP, ACTION_POINTER_UP, ACTION_DOWN, and ACTION_POINTER_DOWN
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// only apply to a single pointer, other events apply to all pointers.
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if (maskedAction == MotionEvent.ACTION_UP
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|| maskedAction == MotionEvent.ACTION_POINTER_UP
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|| maskedAction == MotionEvent.ACTION_DOWN
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|| maskedAction == MotionEvent.ACTION_POINTER_DOWN) {
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addPointerForIndex(event, event.getActionIndex(), packet);
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} else {
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// ACTION_MOVE may not actually mean all pointers have moved
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// but it's the responsibility of a later part of the system to
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// ignore 0-deltas if desired.
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for (int p = 0; p < pointerCount; p++) {
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addPointerForIndex(event, p, packet);
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}
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}
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assert packet.position() % (kPointerDataFieldCount * kBytePerField) == 0;
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nativeDispatchPointerDataPacket(mNativePlatformView, packet, packet.position());
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return true;
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}
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@Override
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public boolean onHoverEvent(MotionEvent event) {
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if (!isAttached()) {
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return false;
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}
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boolean handled = handleAccessibilityHoverEvent(event);
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if (!handled) {
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// TODO(ianh): Expose hover events to the platform,
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// implementing ADD, REMOVE, etc.
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}
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return handled;
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}
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@Override
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protected void onSizeChanged(int width, int height, int oldWidth, int oldHeight) {
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mMetrics.physicalWidth = width;
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mMetrics.physicalHeight = height;
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updateViewportMetrics();
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super.onSizeChanged(width, height, oldWidth, oldHeight);
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}
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@Override
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public final WindowInsets onApplyWindowInsets(WindowInsets insets) {
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mMetrics.physicalPaddingTop = insets.getSystemWindowInsetTop();
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mMetrics.physicalPaddingRight = insets.getSystemWindowInsetRight();
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mMetrics.physicalPaddingBottom = insets.getSystemWindowInsetBottom();
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mMetrics.physicalPaddingLeft = insets.getSystemWindowInsetLeft();
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updateViewportMetrics();
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return super.onApplyWindowInsets(insets);
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}
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@Override
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@SuppressWarnings("deprecation")
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protected boolean fitSystemWindows(Rect insets) {
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if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.KITKAT) {
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mMetrics.physicalPaddingTop = insets.top;
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mMetrics.physicalPaddingRight = insets.right;
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mMetrics.physicalPaddingBottom = insets.bottom;
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mMetrics.physicalPaddingLeft = insets.left;
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updateViewportMetrics();
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return true;
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} else {
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return super.fitSystemWindows(insets);
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}
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}
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private void attach() {
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mNativePlatformView = nativeAttach(this);
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}
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private boolean isAttached() {
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return mNativePlatformView != 0;
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}
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private void preRun() {
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resetAccessibilityTree();
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}
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private void postRun() {
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}
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public void runFromBundle(String bundlePath, String snapshotOverride) {
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preRun();
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nativeRunBundleAndSnapshot(mNativePlatformView, bundlePath, snapshotOverride);
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postRun();
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}
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private void runFromSource(final String assetsDirectory,
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final String main,
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final String packages) {
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Runnable runnable = new Runnable() {
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public void run() {
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preRun();
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nativeRunBundleAndSource(mNativePlatformView, assetsDirectory, main, packages);
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postRun();
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synchronized (this) {
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notify();
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}
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}
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};
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try {
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synchronized (runnable) {
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// Post to the Android UI thread and wait for the response.
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post(runnable);
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runnable.wait();
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}
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} catch (InterruptedException e) {
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Log.e(TAG, "Thread got interrupted waiting for " +
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"RunFromSourceRunnable to finish", e);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return the most recent frame as a bitmap.
|
|
*
|
|
* @return A bitmap.
|
|
*/
|
|
public Bitmap getBitmap() {
|
|
return nativeGetBitmap(mNativePlatformView);
|
|
}
|
|
|
|
private static native long nativeAttach(FlutterView view);
|
|
|
|
private static native String nativeGetObservatoryUri();
|
|
|
|
private static native void nativeDetach(long nativePlatformViewAndroid);
|
|
|
|
private static native void nativeSurfaceCreated(long nativePlatformViewAndroid,
|
|
Surface surface,
|
|
int backgroundColor);
|
|
|
|
private static native void nativeSurfaceChanged(long nativePlatformViewAndroid,
|
|
int width,
|
|
int height);
|
|
|
|
private static native void nativeSurfaceDestroyed(long nativePlatformViewAndroid);
|
|
|
|
private static native void nativeRunBundleAndSnapshot(long nativePlatformViewAndroid,
|
|
String bundlePath,
|
|
String snapshotOverride);
|
|
|
|
private static native void nativeRunBundleAndSource(long nativePlatformViewAndroid,
|
|
String bundlePath,
|
|
String main,
|
|
String packages);
|
|
|
|
private static native void nativeSetViewportMetrics(long nativePlatformViewAndroid,
|
|
float devicePixelRatio,
|
|
int physicalWidth,
|
|
int physicalHeight,
|
|
int physicalPaddingTop,
|
|
int physicalPaddingRight,
|
|
int physicalPaddingBottom,
|
|
int physicalPaddingLeft);
|
|
|
|
private static native Bitmap nativeGetBitmap(long nativePlatformViewAndroid);
|
|
|
|
// Send a platform message to Dart.
|
|
private static native void nativeDispatchPlatformMessage(long nativePlatformViewAndroid,
|
|
String channel, ByteBuffer message, int position, int responseId);
|
|
|
|
private static native void nativeDispatchPointerDataPacket(long nativePlatformViewAndroid,
|
|
ByteBuffer buffer, int position);
|
|
|
|
private static native void nativeDispatchSemanticsAction(long nativePlatformViewAndroid, int id,
|
|
int action);
|
|
|
|
private static native void nativeSetSemanticsEnabled(long nativePlatformViewAndroid,
|
|
boolean enabled);
|
|
|
|
// Send a response to a platform message received from Dart.
|
|
private static native void nativeInvokePlatformMessageResponseCallback(
|
|
long nativePlatformViewAndroid, int responseId, ByteBuffer message, int position);
|
|
|
|
private void updateViewportMetrics() {
|
|
nativeSetViewportMetrics(mNativePlatformView,
|
|
mMetrics.devicePixelRatio,
|
|
mMetrics.physicalWidth,
|
|
mMetrics.physicalHeight,
|
|
mMetrics.physicalPaddingTop,
|
|
mMetrics.physicalPaddingRight,
|
|
mMetrics.physicalPaddingBottom,
|
|
mMetrics.physicalPaddingLeft);
|
|
}
|
|
|
|
// Called by native to send us a platform message.
|
|
private void handlePlatformMessage(String channel, ByteBuffer message, final int responseId) {
|
|
OnBinaryMessageListenerAsync listener = mMessageListeners.get(channel);
|
|
if (listener != null) {
|
|
try {
|
|
listener.onMessage(this, message,
|
|
new BinaryMessageResponse() {
|
|
@Override
|
|
public void send(ByteBuffer response) {
|
|
nativeInvokePlatformMessageResponseCallback(mNativePlatformView,
|
|
responseId, response, response == null ? 0 : response.position());
|
|
}
|
|
});
|
|
} catch (Exception ex) {
|
|
Log.e(TAG, "Uncaught exception in binary message listener", ex);
|
|
nativeInvokePlatformMessageResponseCallback(mNativePlatformView, responseId,
|
|
null, 0);
|
|
}
|
|
return;
|
|
}
|
|
nativeInvokePlatformMessageResponseCallback(mNativePlatformView, responseId, null, 0);
|
|
}
|
|
|
|
private int mNextResponseId = 1;
|
|
private final Map<Integer, BinaryMessageReplyCallback> mPendingResponses = new HashMap<>();
|
|
|
|
// Called by native to respond to a platform message that we sent.
|
|
private void handlePlatformMessageResponse(int responseId, ByteBuffer response) {
|
|
BinaryMessageReplyCallback callback = mPendingResponses.remove(responseId);
|
|
if (callback != null) {
|
|
try {
|
|
callback.onReply(response);
|
|
} catch (Exception ex) {
|
|
Log.e(TAG, "Uncaught exception in binary message listener reply", ex);
|
|
}
|
|
}
|
|
}
|
|
|
|
private void updateSemantics(ByteBuffer buffer, String[] strings) {
|
|
if (mAccessibilityNodeProvider != null) {
|
|
buffer.order(ByteOrder.LITTLE_ENDIAN);
|
|
mAccessibilityNodeProvider.updateSemantics(buffer, strings);
|
|
}
|
|
}
|
|
|
|
// ACCESSIBILITY
|
|
|
|
private boolean mAccessibilityEnabled = false;
|
|
private boolean mTouchExplorationEnabled = false;
|
|
private TouchExplorationListener mTouchExplorationListener;
|
|
|
|
protected void dispatchSemanticsAction(int id, int action) {
|
|
nativeDispatchSemanticsAction(mNativePlatformView, id, action);
|
|
}
|
|
|
|
@Override
|
|
protected void onAttachedToWindow() {
|
|
super.onAttachedToWindow();
|
|
mAccessibilityEnabled = mAccessibilityManager.isEnabled();
|
|
mTouchExplorationEnabled = mAccessibilityManager.isTouchExplorationEnabled();
|
|
if (mAccessibilityEnabled || mTouchExplorationEnabled) {
|
|
ensureAccessibilityEnabled();
|
|
}
|
|
resetWillNotDraw();
|
|
mAccessibilityManager.addAccessibilityStateChangeListener(this);
|
|
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
|
|
if (mTouchExplorationListener == null) {
|
|
mTouchExplorationListener = new TouchExplorationListener();
|
|
}
|
|
mAccessibilityManager.addTouchExplorationStateChangeListener(mTouchExplorationListener);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
protected void onDetachedFromWindow() {
|
|
super.onDetachedFromWindow();
|
|
mAccessibilityManager.removeAccessibilityStateChangeListener(this);
|
|
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
|
|
mAccessibilityManager
|
|
.removeTouchExplorationStateChangeListener(mTouchExplorationListener);
|
|
}
|
|
}
|
|
|
|
private void resetWillNotDraw() {
|
|
setWillNotDraw(!(mAccessibilityEnabled || mTouchExplorationEnabled));
|
|
}
|
|
|
|
@Override
|
|
public void onAccessibilityStateChanged(boolean enabled) {
|
|
if (enabled) {
|
|
mAccessibilityEnabled = true;
|
|
ensureAccessibilityEnabled();
|
|
} else {
|
|
mAccessibilityEnabled = false;
|
|
}
|
|
if (mAccessibilityNodeProvider != null) {
|
|
mAccessibilityNodeProvider.setAccessibilityEnabled(mAccessibilityEnabled);
|
|
}
|
|
resetWillNotDraw();
|
|
}
|
|
|
|
class TouchExplorationListener
|
|
implements AccessibilityManager.TouchExplorationStateChangeListener {
|
|
|
|
@Override
|
|
public void onTouchExplorationStateChanged(boolean enabled) {
|
|
if (enabled) {
|
|
mTouchExplorationEnabled = true;
|
|
ensureAccessibilityEnabled();
|
|
} else {
|
|
mTouchExplorationEnabled = false;
|
|
if (mAccessibilityNodeProvider != null) {
|
|
mAccessibilityNodeProvider.handleTouchExplorationExit();
|
|
}
|
|
}
|
|
resetWillNotDraw();
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public AccessibilityNodeProvider getAccessibilityNodeProvider() {
|
|
ensureAccessibilityEnabled();
|
|
return mAccessibilityNodeProvider;
|
|
}
|
|
|
|
private AccessibilityBridge mAccessibilityNodeProvider;
|
|
|
|
void ensureAccessibilityEnabled() {
|
|
if (mAccessibilityNodeProvider == null) {
|
|
mAccessibilityNodeProvider = new AccessibilityBridge(this);
|
|
nativeSetSemanticsEnabled(mNativePlatformView, true);
|
|
}
|
|
}
|
|
|
|
void resetAccessibilityTree() {
|
|
if (mAccessibilityNodeProvider != null) {
|
|
mAccessibilityNodeProvider.reset();
|
|
}
|
|
}
|
|
|
|
private boolean handleAccessibilityHoverEvent(MotionEvent event) {
|
|
if (!mTouchExplorationEnabled) {
|
|
return false;
|
|
}
|
|
if (event.getAction() == MotionEvent.ACTION_HOVER_ENTER ||
|
|
event.getAction() == MotionEvent.ACTION_HOVER_MOVE) {
|
|
mAccessibilityNodeProvider.handleTouchExploration(event.getX(), event.getY());
|
|
} else if (event.getAction() == MotionEvent.ACTION_HOVER_EXIT) {
|
|
mAccessibilityNodeProvider.handleTouchExplorationExit();
|
|
} else {
|
|
Log.d("flutter", "unexpected accessibility hover event: " + event);
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Send a binary message to the Flutter application. The Flutter Dart code can register a
|
|
* platform message handler that will receive these messages.
|
|
*
|
|
* @param channel Name of the channel that will receive this message.
|
|
* @param message Message payload, a {@link ByteBuffer} with the message bytes between position
|
|
* zero and current position, or null.
|
|
* @param callback Callback that receives a reply from the Flutter application.
|
|
*/
|
|
public void sendBinaryMessage(String channel, ByteBuffer message,
|
|
BinaryMessageReplyCallback callback) {
|
|
int responseId = 0;
|
|
if (callback != null) {
|
|
responseId = mNextResponseId++;
|
|
mPendingResponses.put(responseId, callback);
|
|
}
|
|
nativeDispatchPlatformMessage(mNativePlatformView, channel, message,
|
|
message == null ? 0 : message.position(), responseId);
|
|
}
|
|
|
|
/**
|
|
* Callback invoked when the app replies to a binary message sent with sendBinaryMessage.
|
|
*/
|
|
public interface BinaryMessageReplyCallback {
|
|
|
|
void onReply(ByteBuffer reply);
|
|
}
|
|
|
|
/**
|
|
* Register a callback to be invoked when the Flutter application sends a message
|
|
* to its host. The reply to the message can be provided asynchronously.
|
|
*
|
|
* @param channel Name of the channel used by the application.
|
|
* @param listener Called when messages arrive.
|
|
*/
|
|
public void addOnBinaryMessageListenerAsync(String channel,
|
|
OnBinaryMessageListenerAsync listener) {
|
|
if (listener == null) {
|
|
mMessageListeners.remove(channel);
|
|
} else {
|
|
mMessageListeners.put(channel, listener);
|
|
}
|
|
}
|
|
|
|
public interface OnBinaryMessageListenerAsync {
|
|
|
|
/**
|
|
* Called when a message is received from the Flutter app.
|
|
*
|
|
* @param view The Flutter view hosting the app.
|
|
* @param message Message payload.
|
|
* @param response Used to send a reply back to the app.
|
|
*/
|
|
void onMessage(FlutterView view, ByteBuffer message, BinaryMessageResponse response);
|
|
}
|
|
|
|
public interface BinaryMessageResponse {
|
|
|
|
void send(ByteBuffer reply);
|
|
}
|
|
|
|
/**
|
|
* Broadcast receiver used to discover active Flutter instances.
|
|
*/
|
|
private class DiscoveryReceiver extends BroadcastReceiver {
|
|
|
|
@Override
|
|
public void onReceive(Context context, Intent intent) {
|
|
URI observatoryUri = URI.create(nativeGetObservatoryUri());
|
|
JSONObject discover = new JSONObject();
|
|
try {
|
|
discover.put("id", getContext().getPackageName());
|
|
discover.put("observatoryPort", observatoryUri.getPort());
|
|
Log.i(TAG, "DISCOVER: " + discover);
|
|
} catch (JSONException e) {
|
|
}
|
|
}
|
|
}
|
|
}
|