android - Get media volume level example

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"     xmlns:tools="http://schemas.android.com/tools"     android:id="@+id/root_layout"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:padding="16dp"     android:orientation="vertical"     android:background="#d1dcce"     >     <TextView         android:id="@+id/tv_stats"         android:layout_width="match_parent"         android:layout_height="wrap_content"         android:textStyle="bold"         android:textSize="25sp"         />     <Button         android:id="@+id/btn_get"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="Get Media Volume Level"         /> </LinearLayout> 

MainActivity.java

 package com.cfsuman.me.androidcodesnippets;  import android.app.Activity; import android.content.Context; import android.media.AudioManager; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.LinearLayout; import android.widget.TextView;   public class MainActivity extends AppCompatActivity {     private Context mContext;     private Activity mActivity;      private LinearLayout mRootLayout;     private Button mBtnGet;     private TextView mTVStats;      @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         mRootLayout = findViewById(R.id.root_layout);         mBtnGet = findViewById(R.id.btn_get);         mTVStats = findViewById(R.id.tv_stats);          // Click listener for the button         mBtnGet.setOnClickListener(new View.OnClickListener() {             @Override             public void onClick(View view) {                 /*                     AudioManager                         AudioManager provides access to volume and ringer mode control.                          Instances of this class must be obtained using                         Context.getSystemService(Class) with the argument AudioManager.class or                         Context.getSystemService(String) with the argument Context.AUDIO_SERVICE.                 */                  // Get the AudioManager instance                 AudioManager am = (AudioManager) getSystemService(AUDIO_SERVICE);                  /*                     int getStreamVolume (int streamType)                         Returns the current volume index for a particular stream.                      Parameters                         streamType int : The stream type whose volume index is returned.                      Returns                         int : The current volume index for the stream.                 */                  // Get the music current volume level                 int music_volume_level = am.getStreamVolume(AudioManager.STREAM_MUSIC);                  // Get the device music maximum volume level                 int max = am.getStreamMaxVolume(AudioManager.STREAM_MUSIC);                  // Display the media volume level stats on text view                 mTVStats.setText("Media Max Volume : " + max                         + "\nMedia Current Volume : " + music_volume_level);             }         });     } }