如何在启动时启动BroadcastReceiver？

Question

I have an application that start every day at 10 o'clock, and everything Work fine. But when device reboot BroadcastReceiver doesn't work because app terminated then I start app in boot. When I set it to start in Boot (I mean start BroadcastReceiver) then BroadcastReceiver don't work correctly.

I mean my app start automatically in boot, but the time of app to start is 10 o'clock.

This my code

AndroidMaifest

<application
    android:allowBackup="true"
    android:icon="@drawable/aps"
    android:label="@string/app_name"
    android:roundIcon="@drawable/aps"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity
        android:name=".MainActivity"
        android:theme="@style/AppTheme.NoActionBar">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name=".Main2Activity"
        android:theme="@style/AppTheme.NoActionBar"></activity>



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

    </receiver>

</application>

Mainactivity

public class MainActivity extends AppCompatActivity {


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

        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_CANCEL_CURRENT);
        AlarmManager alarms = (AlarmManager) this.getSystemService(
                Context.ALARM_SERVICE);
        alarms.setInexactRepeating(AlarmManager.RTC_WAKEUP,
                updateTime.getTimeInMillis(),
                AlarmManager.INTERVAL_DAY, recurringDownload);
    }
}

BroadCastReciver

public class Tasks extends BroadcastReceiver {

    final public static String ONE_TIME = "onetime";

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

        Log.i(ONE_TIME, "Executed Tasks.Java File");

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

Answer 1

You defined the same Receiver both for the Alarm in your activity and for BOOT_COMPLETED event; So when the alarm trigger or system boot the same class is called (Which Start the Main Activity).

You need to define two Receiver . One to Receive Alarm and One to Set Alarm on Boot Complete , for Example:

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

, and for your Alarm Receiver you can have your old Receiver:

public class AlarmReceiver extends BroadcastReceiver {

    final public static String ONE_TIME = "onetime";

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

        Log.i(ONE_TIME, "Executed Tasks.Java File");

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

Answer 2

Use two different BroadcastReceiver . One for alarm receiver and another for boot complete.

Here is your BootCompletedReceiver :

public class BootCompletedReceiver 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 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);
    }
}

Update your AndroidManifest.xml as below:

<application
    android:allowBackup="true"
    android:icon="@drawable/aps"
    android:label="@string/app_name"
    android:roundIcon="@drawable/aps"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity
        android:name=".MainActivity"
        android:theme="@style/AppTheme.NoActionBar">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name=".Main2Activity"
        android:theme="@style/AppTheme.NoActionBar">
    </activity>


    <receiver android:name=".Tasks">

    </receiver>

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

    </receiver>
</application>