12

嗨，我正在开发一个应用程序，该应用程序会在从手机上取下耳机时生成一个事件。我用接收方法创建了一个广播接收器

public void onReceive(Context context, Intent intent) {

        // TODO Auto-generated method stub
        String action = intent.getAction();
        Log.i("Broadcast Receiver", "Hello");
        if( (action.compareTo(Intent.ACTION_HEADSET_PLUG))  == 0)   //if the action match a headset one
        {
            int headSetState = intent.getIntExtra("state", 0);      //get the headset state property
            int hasMicrophone = intent.getIntExtra("microphone", 0);//get the headset microphone property
            if( (headSetState == 0) && (hasMicrophone == 0))        //headset was unplugged & has no microphone
            {

                    //do whatever
            }
        }           

    }

调用该方法如下

 IntentFilter receiverFilter = new IntentFilter(Intent.ACTION_HEADSET_PLUG);
        HeadSetBroadCastReceiver receiver = new HeadSetBroadCastReceiver();
        registerReceiver( receiver, receiverFilter );

我也在清单中将其注册为

   <receiver android:name=".HeadsetBroadCastReceiver">
    <intent-filter>
        <action android:name="android.intent.action.ACTION_HEADSET_PLUG"/>
    </intent-filter>
</receiver>

和许可

但这不起作用任何人都可以指导我完成这个吗？

4

5 回答 5

24

这是一个棘手的问题，但您可以在您的活动中使用 BroadCast 作为以下与我一起工作

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    myReceiver = new HeadSetReceiver();
}

并在onResume()方法中注册您的广播

public void onResume() {
    IntentFilter filter = new IntentFilter(Intent.ACTION_HEADSET_PLUG);
    registerReceiver(myReceiver, filter);
    super.onResume();
}

然后在您的活动中声明您的广播

private class HeadSetReceiver extends BroadcastReceiver {
    @Override public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(Intent.ACTION_HEADSET_PLUG)) {
            int state = intent.getIntExtra("state", -1);
            switch (state) {
            case 0:
                Log.d(TAG, "Headset unplugged");
                break;
            case 1:
                Log.d(TAG, "Headset plugged");
                break;
            }
        }
    }
}

希望对你有帮助,,,

于 2013-06-28T10:04:37.430 回答
3

这里的问题是这个广播设置了标志Intent.FLAG_RECEIVER_REGISTERED_ONLY。这意味着清单接收者不会捕捉到这一点。这是一个完整的解释。

于 2012-07-30T08:28:16.697 回答
2

我的问题的答案是这样的。谢谢大家的回复

class NoisyAudioStreamReceiver extends BroadcastReceiver
{
    @Override
    public void onReceive(Context context, Intent intent) {
        if (AudioManager.ACTION_AUDIO_BECOMING_NOISY.equals(intent.getAction())) {
           // pause();
            Log.d("Mesage","Unplug");
            Toast.makeText(context, "Heello",Toast.LENGTH_LONG).show();
        }
    }
}
 IntentFilter intentFilter = new IntentFilter(AudioManager.ACTION_AUDIO_BECOMING_NOISY);
        NoisyAudioStreamReceiver receiver = new NoisyAudioStreamReceiver();
        registerReceiver( receiver, intentFilter );

于 2012-07-30T08:18:59.120 回答
0

我建议您在 onReceive 中切换断点，并在调试模式下检查插入手机设备时收到的事件类型。然后插入这个事件而不是 Intent.ACTION_HEADSET_PLUG 谢谢。

于 2012-07-30T06:58:26.940 回答
0

我想用各自的意图注册广播接收器存在问题。参考这篇文章，看看它是否有效。

我的 logcat 中的异常

07-30 12:41:01.448: E/ActivityThread(321): Activity com.example.test.MainActivity has leaked IntentReceiver com.example.test.BroadcastsHandler@44ee81d8 that was originally registered here. Are you missing a call to unregisterReceiver()?
07-30 12:41:01.448: E/ActivityThread(321): android.app.IntentReceiverLeaked: Activity com.example.test.MainActivity has leaked IntentReceiver com.example.test.BroadcastsHandler@44ee81d8 that was originally registered here. Are you missing a call to unregisterReceiver()?
07-30 12:41:01.448: E/ActivityThread(321):  at android.app.ActivityThread$PackageInfo$ReceiverDispatcher.<init>(ActivityThread.java:939)
07-30 12:41:01.448: E/ActivityThread(321):  at android.app.ActivityThread$PackageInfo.getReceiverDispatcher(ActivityThread.java:734)
07-30 12:41:01.448: E/ActivityThread(321):  at android.app.ContextImpl.registerReceiverInternal(ContextImpl.java:791)
07-30 12:41:01.448: E/ActivityThread(321):  at android.app.ContextImpl.registerReceiver(ContextImpl.java:778)
07-30 12:41:01.448: E/ActivityThread(321):  at android.app.ContextImpl.registerReceiver(ContextImpl.java:772)
07-30 12:41:01.448: E/ActivityThread(321):  at android.content.ContextWrapper.registerReceiver(ContextWrapper.java:318)
07-30 12:41:01.448: E/ActivityThread(321):  at com.example.test.MainActivity.onCreate(MainActivity.java:19)
07-30 12:41:01.448: E/ActivityThread(321):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
07-30 12:41:01.448: E/ActivityThread(321):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
07-30 12:41:01.448: E/ActivityThread(321):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
07-30 12:41:01.448: E/ActivityThread(321):  at android.app.ActivityThread.access$2300(ActivityThread.java:125)
07-30 12:41:01.448: E/ActivityThread(321):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
07-30 12:41:01.448: E/ActivityThread(321):  at android.os.Handler.dispatchMessage(Handler.java:99)
07-30 12:41:01.448: E/ActivityThread(321):  at android.os.Looper.loop(Looper.java:123)
07-30 12:41:01.448: E/ActivityThread(321):  at android.app.ActivityThread.main(ActivityThread.java:4627)
07-30 12:41:01.448: E/ActivityThread(321):  at java.lang.reflect.Method.invokeNative(Native Method)
07-30 12:41:01.448: E/ActivityThread(321):  at java.lang.reflect.Method.invoke(Method.java:521)
07-30 12:41:01.448: E/ActivityThread(321):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
07-30 12:41:01.448: E/ActivityThread(321):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
07-30 12:41:01.448: E/ActivityThread(321):  at dalvik.system.NativeStart.main(Native Method)

这就是我在我的一个项目中注册广播接收器的方式：

创建：

$////////////////broadcast reciever/////////////
    IntentFilter iFilter = new IntentFilter();
    iFilter.addAction(handler.ACTION);
    iFilter.addCategory(Intent.CATEGORY_DEFAULT);
    handler = new HandleTime();
    registerReceiver(handler, iFilter);

清单.xml：

<activity android:name=".MainActivity"
              android:label="@string/app_name">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>

    </activity>
于 2012-07-30T07:01:32.187 回答