我试图使用BroadcastReceiver,但它不工作,请帮我解决这个问题.
MyReceiver. java
MyReceiver. java
package com.example.broadcast_receiver; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.util.Log; public class MyReceiver extends BroadcastReceiver { @Override public void onReceive(Context context,Intent intent) { // TODO Auto-generated method stub Log.i("[BroadcastReceiver]","MyReceiver"); if(intent.getAction().equals(Intent.ACTION_SCREEN_ON)){ Log.i("[BroadcastReceiver]","Screen ON"); } else if(intent.getAction().equals(Intent.ACTION_SCREEN_OFF)){ Log.i("[BroadcastReceiver]","Screen OFF"); } } }
AndroidManifest.xml中
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.broadcast_receiver" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="9" android:targetSdkVersion="16" /> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <receiver android:name=".MyReceiver" android:enabled="true" android:exported="false"> <intent-filter> <action android:name="android.intent.action.SCREEN_ON"/> <action android:name="android.intent.action.SCREEN_OFF"/> </intent-filter> </receiver> <activity android:name="com.example.broadcast_receiver.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> </application> </manifest>
BroadcastReceiver无法正常工作且没有制作任何日志,请帮我解决这个问题.
解决方法
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public class MainActivity extends Activity { //Create broadcast object BroadcastReceiver mybroadcast = new BroadcastReceiver() { //When Event is published,onReceive method is called @Override public void onReceive(Context context,Intent intent) { // TODO Auto-generated method stub Log.i("[BroadcastReceiver]","MyReceiver"); if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) { Log.i("[BroadcastReceiver]","Screen ON"); } else if (intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) { Log.i("[BroadcastReceiver]","Screen OFF"); } } }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); registerReceiver(mybroadcast,new IntentFilter(Intent.ACTION_SCREEN_ON)); registerReceiver(mybroadcast,new IntentFilter(Intent.ACTION_SCREEN_OFF)); } }
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