From a91d87996bcdd22e02666c251d5e601fe1eaaefb Mon Sep 17 00:00:00 2001
From: afohrman <afohrman@google.com>
Date: Tue, 31 Jul 2018 10:08:24 -0700
Subject: [PATCH] Add helper text customization controls to text field demo.

PiperOrigin-RevId: 206780816
---
 .../TextFieldControllableDemoFragment.java     | 17 +++++++++++++++++
 .../res/layout/cat_textfield_controls.xml      | 18 ++++++++++++++++++
 .../catalog/textfield/res/values/strings.xml   |  2 ++
 3 files changed, 37 insertions(+)

diff --git a/catalog/java/io/material/catalog/textfield/TextFieldControllableDemoFragment.java b/catalog/java/io/material/catalog/textfield/TextFieldControllableDemoFragment.java
index 16cd62ce7..e75230469 100644
--- a/catalog/java/io/material/catalog/textfield/TextFieldControllableDemoFragment.java
+++ b/catalog/java/io/material/catalog/textfield/TextFieldControllableDemoFragment.java
@@ -73,6 +73,17 @@ public abstract class TextFieldControllableDemoFragment extends TextFieldDemoFra
           }
         });
 
+    // Initialize button for updating the helper text.
+    TextInputLayout helperTextTextField = view.findViewById(R.id.text_input_helper_text);
+    view.findViewById(R.id.button_update_helper_text)
+        .setOnClickListener(
+            v -> {
+              if (!checkTextInputIsNull(helperTextTextField)) {
+                setAllTextFieldsHelperText(
+                    String.valueOf(helperTextTextField.getEditText().getText()));
+              }
+            });
+
     // Initialize button for updating the counter max.
     TextInputLayout counterMaxTextField = view.findViewById(R.id.text_input_counter_max);
     view.findViewById(R.id.button_counter_max)
@@ -106,6 +117,12 @@ public abstract class TextFieldControllableDemoFragment extends TextFieldDemoFra
     }
   }
 
+  private void setAllTextFieldsHelperText(String helperText) {
+    for (TextInputLayout textfield : textfields) {
+      textfield.setHelperText(helperText);
+    }
+  }
+
   private void setAllTextFieldsCounterMax(int length) {
     for (TextInputLayout textfield : textfields) {
       textfield.setCounterMaxLength(length);
diff --git a/catalog/java/io/material/catalog/textfield/res/layout/cat_textfield_controls.xml b/catalog/java/io/material/catalog/textfield/res/layout/cat_textfield_controls.xml
index d8ac1d380..e3113f195 100644
--- a/catalog/java/io/material/catalog/textfield/res/layout/cat_textfield_controls.xml
+++ b/catalog/java/io/material/catalog/textfield/res/layout/cat_textfield_controls.xml
@@ -94,6 +94,24 @@
           android:layout_gravity="center_horizontal"
           android:text="@string/cat_textfield_update_error_text"/>
 
+      <com.google.android.material.textfield.TextInputLayout
+          android:id="@+id/text_input_helper_text"
+          android:layout_width="match_parent"
+          android:layout_height="wrap_content"
+          android:layout_margin="4dp"
+          android:hint="@string/cat_textfield_customize_helper_text"
+          app:errorEnabled="true">
+        <com.google.android.material.textfield.TextInputEditText
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"/>
+      </com.google.android.material.textfield.TextInputLayout>
+      <Button
+          android:id="@+id/button_update_helper_text"
+          android:layout_width="wrap_content"
+          android:layout_height="wrap_content"
+          android:layout_gravity="center_horizontal"
+          android:text="@string/cat_textfield_update_helper_text"/>
+
       <com.google.android.material.textfield.TextInputLayout
           android:id="@+id/text_input_counter_max"
           android:layout_width="match_parent"
diff --git a/catalog/java/io/material/catalog/textfield/res/values/strings.xml b/catalog/java/io/material/catalog/textfield/res/values/strings.xml
index 4d08cc837..746c1cf40 100644
--- a/catalog/java/io/material/catalog/textfield/res/values/strings.xml
+++ b/catalog/java/io/material/catalog/textfield/res/values/strings.xml
@@ -42,10 +42,12 @@
   <string name="cat_textfield_error">Error</string>
   <string name="cat_textfield_customize_label_text">Label text</string>
   <string name="cat_textfield_customize_error_text">Error text</string>
+  <string name="cat_textfield_customize_helper_text">Helper text</string>
   <string name="cat_textfield_customize_color">Change color</string>
   <string name="cat_textfield_customize_counter_text">Character counter max</string>
   <string name="cat_textfield_update_label_text">Update label</string>
   <string name="cat_textfield_update_error_text">Update error</string>
+  <string name="cat_textfield_update_helper_text">Update helper</string>
   <string name="cat_textfield_update_counter_text">Update character counter</string>
   <string name="cat_textfield_null_input_error_text">Enter a value</string>
   <string name="cat_textfield_show_error_text">Show error</string>