java - 手机重启后闹钟管理器不起作用

Question

当我设置闹钟，然后重新启动设备时，闹钟停止工作。我正确注册了 BroadcastReciver 并创建了 Boot BroadCastReciver，但设备重启后仍然无法使用。

我的代码:

第一次设置闹钟的MainActivty:

public class MainActivity extends AppCompatActivity {

 @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);



        SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(this);
        SharedPreferences.Editor editor = settings.edit();
        editor.putString("language","1");
        editor.commit();

        setRecurringAlarm(this);

    }

    private void setRecurringAlarm(Context context) {

        Calendar updateTime = Calendar.getInstance();
        updateTime.setTimeZone(TimeZone.getTimeZone("GMT+5:00"));
        updateTime.set(Calendar.HOUR_OF_DAY, 3);
        updateTime.set(Calendar.MINUTE, 00);

        Intent intent = new Intent(context, Tasks.class);
        PendingIntent recurringDownload = PendingIntent.getBroadcast(context,
                0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
        AlarmManager alarms = (AlarmManager) this.getSystemService(
                Context.ALARM_SERVICE);
        alarms.setInexactRepeating(AlarmManager.RTC_WAKEUP,
                updateTime.getTimeInMillis(),
                AlarmManager.INTERVAL_DAY, recurringDownload);
    }
}

广播接收器任务:

public class Tasks extends BroadcastReceiver {

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

            Intent i = new Intent();
            i.setClassName(context, Main2Activity.class);
            i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            context.startActivity(i);
        }
}

启动广播接收器:

public class BootBroadcastReceiver extends BroadcastReceiver {

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

        Calendar updateTime = Calendar.getInstance();
        updateTime.setTimeZone(TimeZone.getTimeZone("GMT+5:00"));
        updateTime.set(Calendar.HOUR_OF_DAY, 3);
        updateTime.set(Calendar.MINUTE, 00);

        Intent i = new Intent(context, Tasks.class);
        PendingIntent recurringDownload = PendingIntent.getBroadcast(context,
                0, i, PendingIntent.FLAG_UPDATE_CURRENT);
        AlarmManager alarms = (AlarmManager) context.getSystemService(
                Context.ALARM_SERVICE);
        alarms.setInexactRepeating(AlarmManager.RTC_WAKEUP,
                updateTime.getTimeInMillis(),
                AlarmManager.INTERVAL_DAY, recurringDownload);
    }
}

AndroidManifest:

 <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="com.android.alarm.permission.SET_ALARM" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission
    android:name="android.permission.MODIFY_PHONE_STATE"
    tools:ignore="ProtectedPermissions" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />

<application
    .
    .
    .

    <receiver android:name=".BootBroadcastReceiver"
        android:enabled="true">
        <intent-filter>
            <action android:name="android.intent.action.BOOT_COMPLETED" />
            <action android:name="android.intent.action.QUICKBOOT_POWERON" />
            <uses-permission android:name="android.permission.WAKE_LOCK" />
            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>
    </receiver>
    <receiver android:name=".Tasks"
        android:enabled="true">
    </receiver>

</application>

Answer 1

您需要服务和广播接收器来在手机重新启动时唤醒您的应用程序。这里我有服务代码可能会对您有所帮助(它在我的应用程序中完美运行)。

服务

import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.support.annotation.Nullable;


public class MyService extends Service {
    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        new GPSTracker(ReunirseService.this);
        return START_STICKY;
    }
}

接收器将接收启动完成的 Intent 并启动您的服务。

    import android.content.BroadcastReceiver;
    import android.content.Context;
    import android.content.Intent;

    public class BootReceiver extends BroadcastReceiver {
        RestartServiceReceiver alarm = new RestartServiceReceiver();
        @Override
        public void onReceive(Context context, Intent intent) {
            if (intent.getAction().equals("android.intent.action.BOOT_COMPLETED"))
            {
             Intent i = new Intent(context, MyService .class);
             context.startService(i);
            }

        }
    }

并且需要添加RECEIVE_BOOT_COMPLETED权限

<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />

还需要添加过滤器

        <receiver android:name=".BootReceiver">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED" />
            </intent-filter>
        </receiver>