最近在项目中有用到原生安卓和IOS,所以将自己最近所学的收获记录一下~
项目中有一个需求是通过手环来控制手机上的系统音乐播放/暂停或者进行上一首下一首的切换,在这里用到了安卓中的AudioManager来实现系统音乐的管理
首先要获取到AudioManager :
AudioManager audioManager = ((AudioManager) getSystemService(Context.AUDIO_SERVICE));
获取到AudioManager类之后一切就好办了,首先第一个需求,获取当前是否在播放音乐
使用AudioManager中的isMusicActive()方法即可,该方法会返回一个布尔值,true表示当前有声音正在播放,false则表示没有
boolean isMusicActive = audioManager.isMusicActive();
接下来是暂停或者开始音乐
这里使用AudioManager发送KeyEvent按键事件即可
KeyEvent downEvent = new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE);
KeyEvent upEvent = new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE);
((AudioManager) getSystemService(Context.AUDIO_SERVICE)).dispatchMediaKeyEvent(downEvent);
((AudioManager) getSystemService(Context.AUDIO_SERVICE)).dispatchMediaKeyEvent(upEvent);
接下来是下一首,与暂停/开始音乐同样的方法:
KeyEvent downEvent = new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_MEDIA_NEXT);
KeyEvent upEvent = new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_MEDIA_NEXT);
((AudioManager) getSystemService(Context.AUDIO_SERVICE)).dispatchMediaKeyEvent(downEvent);
((AudioManager) getSystemService(Context.AUDIO_SERVICE)).dispatchMediaKeyEvent(upEvent);
上一首:
KeyEvent downEvent = new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_MEDIA_PREVIOUS);
KeyEvent upEvent = new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_MEDIA_PREVIOUS);
((AudioManager) getSystemService(Context.AUDIO_SERVICE)).dispatchMediaKeyEvent(downEvent);
((AudioManager) getSystemService(Context.AUDIO_SERVICE)).dispatchMediaKeyEvent(upEvent);
OK,现在我们已经实现基本的音乐控制了,接下来写一个Activity来进行测试一下,这里我简单的使用三个按键来绑定事件测试一下:
MainActivity.java:
package com.shine.music;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Context;
import android.media.AudioManager;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
AudioManager audioManager = ((AudioManager) getSystemService(Context.AUDIO_SERVICE));
boolean isMusicActive = audioManager.isMusicActive();
Log.e("shine",isMusicActive + "");
}
public void lastMusic(View view) {
KeyEvent downEvent = new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_MEDIA_PREVIOUS);
KeyEvent upEvent = new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_MEDIA_PREVIOUS);
((AudioManager) getSystemService(Context.AUDIO_SERVICE)).dispatchMediaKeyEvent(downEvent);
((AudioManager) getSystemService(Context.AUDIO_SERVICE)).dispatchMediaKeyEvent(upEvent);
}
public void playMusicLocal(View view) {
KeyEvent downEvent = new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE);
KeyEvent upEvent = new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE);
((AudioManager) getSystemService(Context.AUDIO_SERVICE)).dispatchMediaKeyEvent(downEvent);
((AudioManager) getSystemService(Context.AUDIO_SERVICE)).dispatchMediaKeyEvent(upEvent);
}
public void nextMusicLocal(View view) {
KeyEvent downEvent = new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_MEDIA_NEXT);
KeyEvent upEvent = new KeyEvent(KeyEvent.ACTION_UP, KeyEvent.KEYCODE_MEDIA_NEXT);
((AudioManager) getSystemService(Context.AUDIO_SERVICE)).dispatchMediaKeyEvent(downEvent);
((AudioManager) getSystemService(Context.AUDIO_SERVICE)).dispatchMediaKeyEvent(upEvent);
}
}
经测试是没问题的~
完整代码: