广播接收器没有收到相机上的按钮键preSS [英] BroadcastReceiver don't receive keypress on Camera button
问题描述
我想，当我的应用程序在后台和I $页上$ PSS玩一些音 相机的该按钮我做这个简单的步骤。
I am trying to play some tone when my application is in background and I press on "Camera" button for that I am doing this simple steps.
-
创建
广播接收器类
public class CameraButtonListener extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
ToneGenerator tone = new ToneGenerator(AudioManager.STREAM_DTMF, 100);
tone.startTone(0,2000);
abortBroadcast();
}
}
注册 BrodcastReceiver 在的onCreate 梅索德。
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
MediaButtonBrodcastReceiver receiver = new MediaButtonBrodcastReceiver();
IntentFilter filter = new IntentFilter(Intent.ACTION_CAMERA_BUTTON);
filter.setPriority(25645895);
registerReceiver(receiver,filter);
}
添加brodcast接收器Android清单。
Adding brodcast receiver to android manifest.
<receiver android:enabled="true" android:exported="true" android:name=".CameraButtonListener">
<intent-filter android:priority="25645895">
<action android:name="android.intent.action.CAMERA_BUTTON" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
我启动我的应用程序后，再preSS菜单键，应用程序转到后台，我以后美元，拍照键并没有什么heppens p $ PSS，只有摄像头应用程序中打开。也许我做错了什么，或我错过了什么？
After I launch my application, then press menu button and application goes to the background, after I press on Camera Button and nothing heppens, only camera application is opened. Maybe I am doing something wrong or I have missed something ?
我用索尼爱立信Xperia Arc手机采用Android 2.3.4操作系统版本。
I use Sony Ericsson XPeria Arc phone with Android 2.3.4 OS version.
推荐答案
摆脱＆LT;类别＆GT; 在＆LT元素;接收器GT ; 元素，如果你使用的是第三步。这广播可能没有一个类别 - 你通常只看到类用于。 意图对象startActivity（）
Get rid of the <category> element in your <receiver> element, if you are using step #3. That broadcast probably does not have a category -- you usually only see categories on Intent objects used for startActivity().
请注意，您的第2步中没有指定一个类的的IntentFilter ，这是很好的。
Note that your step #2 does not specify a category with its IntentFilter, which is fine.
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