AudioManager音频管理器 MediaPlayer ToggleButton

import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.app.Activity;
import android.app.Service;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.ToggleButton;

public class AudioTest extends Activity {
  Button play;
  Button up;
  Button down;
  AudioManager aManager;
  ToggleButton mute;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_audio_test);
    //获取系统的音频服务
    aManager = (AudioManager) getSystemService(Service.AUDIO_SERVICE);
    //获取界面中的三个按钮和一个ToggleButton控件
    play = (Button) findViewById(R.id.play);
    up = (Button) findViewById(R.id.up);
    down = (Button) findViewById(R.id.down);
    mute = (ToggleButton) findViewById(R.id.mute);
    //为play按钮的单击事件绑定监听器
    play.setOnClickListener(new OnClickListener() {

      @Override
      public void onClick(View v) {
        // 初始化MediaPlayer对象,准备播放音乐
        MediaPlayer mPlayer = MediaPlayer.create(AudioTest.this, R.raw.earth);
        //设置循环播放
        mPlayer.setLooping(true);
        //开始播放
        mPlayer.start();
      }
    });
    up.setOnClickListener(new OnClickListener() {

      @Override
      public void onClick(View v) {
        // 指定调节音乐的音频,增大音量,而且显示音量图形示意
        aManager.adjustStreamVolume(AudioManager.STREAM_MUSIC,
        AudioManager.ADJUST_RAISE, AudioManager.FLAG_SHOW_UI);
      }
    });
    down.setOnClickListener(new OnClickListener() {

      @Override
      public void onClick(View v) {
        // 指定调节音乐的音频,降低音量,而且显示音量图形示意
        aManager.adjustStreamVolume(AudioManager.STREAM_MUSIC,
        AudioManager.ADJUST_LOWER, AudioManager.FLAG_SHOW_UI);
      }
    });
    mute.setOnCheckedChangeListener(new OnCheckedChangeListener() {

      @Override
      public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        // 指定调解音乐的音频,根据isChecked确定是否需要静音
        aManager.setStreamMute(AudioManager.STREAM_MUSIC, isChecked);
      }
    });
  }

 

}

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本文链接:https://www.cnblogs.com/jiww/p/5609526.html