Problem while displaying activity from BroadcastReceiver

Hi I have a Broadcast receiver with following code.

   1. Intent i = new Intent(context, A.class);    
   2. i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);    
   3. context.startActivity(i);  

This works fine and my activity does start, but it starts on top of my main activity i.e. B. What I want is that from开发者_如何学JAVA my broadcast receiver I should be able start an Activity A, such that it does not start on top of B. Why B is always starting in background. What I am doing wrong.

Also, to mention by activity A has Theme.Dialog.

Please let me know your thoughts.

A new activity is supposed to start on top of existing activities.

If you want to start something without appearing in the activity history stack, maybe this something shouldn't be an Activity but a Service instead?

Edit: I think you can change this behaviour with FLAG_ACTIVITY_NEW_TASK in conjunction with android:launchMode="singleTask" in the Manifest. (see documentation on launch mode)

If you start an Activity then of course it will come foreground.The activity previously was in foreground will go to the background automatically.

If you don't need to start it on top of B,what about to start it from service?.Let Activity A stay as it is.

If you need to access anything from service and no need to show the activity,then surely you are looking for other then starting an Activity with an intent.

Finally if you really want to start Activity A,and B will be on top then start Activity B after starting A

I think you mean you want to start the application with a different activity. You can edit your AndroidManifest.xml file to make a different activity start first.

EDIT: Heres an example:

<application android:icon="@drawable/icon" android:label="@string/app_name">
    <activity android:name=".MainActivity" <-this will start first
              android:label="@string/app_name">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity android:name =".otherActivity"
        android:theme="@android:style/Theme.Dialog">
    </activity>
    <activity android:name=".anotherActivity"></activity>
</application>