android - Auto sizing TextView in support library

activity_main.xml

 <?xml version="1.0" encoding="utf-8"?> <LinearLayout     xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:app="http://schemas.android.com/apk/res-auto"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:background="#adf9ce"     android:padding="16dp"     android:orientation="vertical"     >     <!--         android:autoSizeTextType              Specify the type of auto-size. Note that this feature is not supported by EditText,             works only for TextView.              Must be one of the following constant values.              Constant : Value : Description             none : 0 : No auto-sizing (default).             uniform : 1 : Uniform horizontal and vertical text size scaling to fit within the container.      -->     <TextView         android:id="@+id/text_view"         android:layout_width="match_parent"         android:layout_height="200dp"         android:text="Auto Size Text."         android:textColor="#e92121"         android:background="#e9ebf1"         app:autoSizeTextType="uniform"         />     <TextView         android:id="@+id/text_view2"         android:layout_width="350dp"         android:layout_height="250dp"         android:text="This is another auto size text."         android:textColor="#1679ca"         android:background="#e9e1e1"         app:autoSizeTextType="uniform"         />     <TextView         android:id="@+id/text_view3"         android:layout_width="match_parent"         android:layout_height="100dp"         android:textColor="#48792e"         android:background="#eff7f2"         android:text="Auto sizing text view programmatically."         /> </LinearLayout> 

MainActivity.java

 package com.cfsuman.me.androidcodesnippets;  import android.app.Activity; import android.content.Context; import android.support.v4.widget.TextViewCompat; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.TextView;   public class MainActivity extends AppCompatActivity {     private Context mContext;     private Activity mActivity;      private TextView mTextView;     private TextView mTextView2;     private TextView mTextView3;      @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);          // Get the application context         mContext = getApplicationContext();         mActivity = MainActivity.this;          // Get the widget reference from xml layout         mTextView = (TextView) findViewById(R.id.text_view);         mTextView2 = (TextView) findViewById(R.id.text_view2);         mTextView3 = (TextView) findViewById(R.id.text_view3);          /*             TextViewCompat                 Helper for accessing features in TextView in a backwards compatible fashion.          */          /*             setAutoSizeTextTypeWithDefaults                  void setAutoSizeTextTypeWithDefaults (TextView textView, int autoSizeTextType)                  Specify whether this widget should automatically scale the text to try to perfectly                 fit within the layout bounds by using the default auto-size configuration.                  Parameters                     textView : TextView                     autoSizeTextType : int: the type of auto-size. Must be one of                         AUTO_SIZE_TEXT_TYPE_NONE or AUTO_SIZE_TEXT_TYPE_UNIFORM         */          // Programmatically set auto sizing text view         TextViewCompat.setAutoSizeTextTypeWithDefaults(                 mTextView3,TextViewCompat.AUTO_SIZE_TEXT_TYPE_UNIFORM         );     } }