Android Servicer 播放音乐

最新推荐文章于 2024-10-22 07:30:00 发布

原创最新推荐文章于 2024-10-22 07:30:00 发布 · 264 阅读

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CC 4.0 BY-SA版权

文章标签：

#android #service

本文介绍了如何在Android应用中使用Service组件播放音乐。首先，需要在res/raw文件夹下存放音乐文件，例如myhome.mp3。然后，在XML布局中添加三个按钮，最后在MainActivity.java中实现音乐播放的逻辑。

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//先在res下建一个文件夹raw,将音乐放入其中

//以一个为例

//myhome.mp3

//在Xml中添加3个按钮

 <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="播放" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="暂停" />

    <Button
        android:id="@+id/button3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="停止" />

//可以先键ServiceDDDD,继承Service

public class ServiceDDDD extends Service {

	private MediaPlayer mediaPlayer;

	@Override
	public IBinder onBind(Intent arg0) {
		// TODO Auto-generated method stub
		return null;
		
	}

	@Override
	public void onCreate() {
		// TODO Auto-generated method stub
		super.onCreate();
		mediaPlayer = MediaPlayer.create(this, R.raw.myhome);

	}


	@Override
	public int onStartCommand(Intent intent, int flags, int startId) {
		// TODO Auto-generated method stub
		int extra = intent.getIntExtra("command", 0);
		switch (extra) {
		case 1:
			mediaPlayer.start();
			break;
		case 2:
			if (mediaPlayer != null && mediaPlayer.isPlaying()) {
				mediaPlayer.pause();
			}
			break;
		case 3:
			if (mediaPlayer != null) {
				mediaPlayer.stop();
			}
			break;
		default:
			break;
		}
		return super.onStartCommand(intent, flags, startId);
	}

	@Override
	public void onDestroy() {
		// TODO Auto-generated method stub
		super.onDestroy();
		if (mediaPlayer != null) {
			mediaPlayer.release();
			mediaPlayer = null;
		}

	}

}

//MainActivity.java

public class MainActivity extends Activity implements OnClickListener {

	private Button button1, button2, button3;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		button1 = (Button) findViewById(R.id.button1);
		button2 = (Button) findViewById(R.id.button2);
		button3 = (Button) findViewById(R.id.button3);

		button1.setOnClickListener(this);
		button2.setOnClickListener(this);
		button3.setOnClickListener(this);

	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

	@Override
	public void onClick(View arg0) {
		// TODO Auto-generated method stub
		Intent intent = new Intent(this, ServiceDDDD.class);

		switch (arg0.getId()) {
		case R.id.button1:
			intent.putExtra("command", 1);
			break;
		case R.id.button2:
			intent.putExtra("command", 2);
			break;
		case R.id.button3:
			intent.putExtra("command", 3);
			break;
		default:
			break;
		}
		startService(intent);
		
	}

}