大鹏一日同风起,扶摇直上九万里。这篇文章主要讲述BroadcastReceiver在Android上没有按预期工作相关的知识,希望能为你提供帮助。
我知道这已被问过很多次,但我无法让这个工作。我查看了android文档和其他来源。我得到了这个活动,里面有一个广播接收器变量,并在构造函数中启动一个服务:
private BroadcastReceiver mReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(getApplicationContext(), "Received", Toast.LENGTH_SHORT).show();
}
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_compass);
Intent mIntent = new Intent(this, GPSTracker.class);
startService(mIntent);
}@Override
public void onResume() {
super.onResume();
registerReceiver(mReceiver, new IntentFilter());
}@Override
protected void onStop() {
unregisterReceiver(mReceiver);
super.onStop();
}
我把服务放在清单中,我确信它能正常工作。任何帮助将不胜感激。
广播接收器应该定期从服务中接收2个浮点数。
<
?xml version="1.0" encoding="utf-8"?>
<
manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="jemboy.compass" >
<
uses-permission android:name="android.permission.INTERNET" />
<
uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<
application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<
service
android:name=".GPSTracker">
<
/service>
<
activity
android:name=".MainActivity"
android:label="@string/app_name" >
<
/activity>
<
activity android:name=".CompassActivity">
<
intent-filter>
<
action android:name="android.intent.action.MAIN" />
<
category android:name="android.intent.category.LAUNCHER" />
<
/intent-filter>
<
/activity>
<
activity android:name=".OtherActivity">
<
/activity>
<
/application>
答案在活动中
private BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(UPDATE_PLAYER)) {
updateMediaPlayerToggle();
} else if (intent.getAction().equals(BUFFERING)) {
showMediaPlayerBuffering();
}
}
};
private void registerBroadcastReceiver() {
LocalBroadcastManager broadcastManager = LocalBroadcastManager.getInstance(this);
IntentFilter updateIntentFilter = new IntentFilter();
updateIntentFilter.addAction(UPDATE_PLAYER);
updateIntentFilter.addAction(BUFFERING);
broadcastManager.registerReceiver(broadcastReceiver, updateIntentFilter);
}
在服务中。
private void sendUpdatePlayerIntent() {
Log.d(TAG, "updatePlayerIntent");
Intent updatePlayerIntent = new Intent(MainActivity.UPDATE_PLAYER);
LocalBroadcastManager.getInstance(this).sendBroadcast(updatePlayerIntent);
}
【BroadcastReceiver在Android上没有按预期工作】来自媒体播放器服务的示例。
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