Android BroadcastReceiver 和开始一个 Intent

Question

public class SessionManager extends BroadcastReceiver{
Date timeOff;
Date timeOn;

@Override
public void onReceive(Context context, Intent intent) {


    if( "android.intent.action.SCREEN_OFF".equals(intent.getAction())) {
        Log.i("MobileViaNetReceiver", "Screen off - start time to end session");
        timeOff = Calendar.getInstance().getTime();
    } 

    if( "android.intent.action.ACTION_SHUTDOWN".equals(intent.getAction())) {
        // DO WHATEVER YOU NEED TO DO HERE
        Log.i("MobileViaNetReceiver", "Shut down - log off user");
        DbAdapter_User db = new DbAdapter_User(context);
        db.open();
        db.handleLogout();
        db.close();
    } 

    if( "android.intent.action.SCREEN_ON".equals(intent.getAction())) {

        timeOn = Calendar.getInstance().getTime();

        long diffInMs = timeOn.getTime()-timeOff.getTime();

        // convert it to Minutes
        long diffInMins = TimeUnit.MILLISECONDS.toMinutes(diffInMs);

        if ((int) (diffInMins) > 15) {
            //log out user
            Log.i("MobileViaNetReceiver", "User inactive for 15 minutes - logout user");
            DbAdapter_User db = new DbAdapter_User(context);
            db.open(); // ******* HERE *************
            db.handleLogout();
            db.close();

        } else {
            Log.i("MobileViaNetReceiver", "User still active");
        }
    }   
}

当屏幕打开时，我正在检查用户是否关闭屏幕超过 15 分钟，如果是，请注销他。并转到 LonIn 屏幕。我想在调用 handleLogout() 时启动一个 Intent (标记为 * HERE **)我可以在类扩展 BroadcastReceiver 时这样做吗？如果没有，我还能做什么？

Answer 1

你需要记住 intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

写下错误消息“E/AndroidRuntime( 2339): java.lang.RuntimeException: Unable to start receiver android.util.AndroidRuntimeException: Calling startActivity() from outside of an Activity context需要 FLAG_ACTIVITY_NEW_TASK 标志。这真的是你想要的吗？”

public class AgeingAutoStartBroadcast extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {

    Intent intent1 = new Intent(context,MyMainClass.class);
    intent1.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    context.startActivity(intent1);
    );  
}

感谢所有在这里写有用信息的人