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如何在广播接收器呼叫一个号码或处于 OFFHOOK 状态时开始播放音频歌曲，并在 IDLE 或通话结束时停止播放。

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.telephony.TelephonyManager;
import android.widget.Toast;
import android.media.MediaPlayer;

public class Ringing extends BroadcastReceiver{
    Context context;
    public static MediaPlayer ob=null;
    @Override
    public void onReceive(Context context, Intent intent){
        String state = intent.getStringExtra(TelephonyManager.EXTRA_STATE);

        if(state.equals(TelephonyManager.EXTRA_STATE_OFFHOOK)){
           // Toast.makeText(context, "Call Recieved", Toast.LENGTH_LONG).show();
            ob = MediaPlayer.create(context,R.raw.trouble);
            ob.start();
        }
        if(state.equals(TelephonyManager.EXTRA_STATE_IDLE)){
           if(ob.isPlaying()) {
               ob.stop();
                ob.destroy();
           }
        }
    }
}
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1 回答 1

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在广播接收器代码中声明类变量，如下所示：

public class PhonecallReceiver extends BroadcastReceiver {
    static String phoneNumber;
    private static boolean ringing, received;
    .......................

接下来在 onReceive 方法中放入以下代码：

收到电话号码时，状态为： IDLE>RINGING>OFFHOOK>IDLE

当未收到电话号码时，状态为： IDLE>RINGING>IDLE

当状态为 RINGING 时，设置振铃变量为真，然后当状态为 OFFHOOK 时，检查变量振铃是否为真，然后选择呼叫并开始音频，并将振铃设置为假，接收为真。接下来，当状态为 IDLE 时，检查收到的变量是否为真，然后被选中的呼叫被断开，现在开始播放音乐。

@Override
    public void onReceive(Context context, Intent intent) {
        Bundle bundle = intent.getExtras();
        String state = bundle.getString(TelephonyManager.EXTRA_STATE);
        String temp = bundle.getString(TelephonyManager.EXTRA_INCOMING_NUMBER);
        if (!(state == null) && state.equals(TelephonyManager.EXTRA_STATE_RINGING)) {
            ringing = true;
            received = false;
        } else if (!(state == null) && state.equals(TelephonyManager.EXTRA_STATE_OFFHOOK) && ringing) {
            received = true;
            ringing = false;
            //add code to start music
        } else if (!(state == null) && state.equals(TelephonyManager.EXTRA_STATE_IDLE) && received) {
            //add code to stop music
            received = false;
            ringing = false;
        }
    }
于 2016-03-07T12:30:29.253 回答