我正在嘗試編寫BroadcastReceiver
來檢查Internet連接。但它不起作用。我的接收機是:啓用移動連接的廣播接收器不起作用
public class MobileDataOnBroadcastReceiver extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent) {
Log.d(MainActivity.TAG, "Broadcast received");
Intent intent1 = new Intent(context, LoadPictureService.class);
context.startService(intent1);
}
}
當我嘗試在MainActivity
動態註冊它,我得到「Cannot resolve symbol conn
」:
當我嘗試在Manifest
進行註冊,BroadcastReceiver
只是不啓動在所有。我Manifest
:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.aleksandr.homework3">
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".MobileDataOnBroadcastReceiver">
<intent-filter>
<action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
</intent-filter>
</receiver>
</application>
</manifest>
有關於這一主題的堆棧溢出了不少問題,但沒有人回答我的問題。爲什麼我不能動態註冊BroadcastReceiver
?爲什麼在Manifest
時不工作?我應該怎麼做才能使它工作?
欲瞭解更多信息,請查看此視頻:https://www.youtube.com/watch?v = vBjTXKpaFj8 –