Skip to main content

Android activity Launch modes


Launch modes defines how an instance of an activity is associated with the current task. You can define different launch modes as below,

1. Standard
2. Single Top
3. Single Task
4. Single Instance

1. Standard :-
Default activity mode will be Standard.Activity instance will be created every time for each new intent.

2. Single Top :-
 Single top activity will be created if the activity is not on the top of the stack , if activity is on the top of the stack OnNewIntent() of activity gets called otherwise new instance will be created and pushed in to the stack.

3. Single Task :-
Instance of the activity will be created only if it doesn't exist in the system otherwise it will be moved to front and onNewIntent() will be called.

4. Single Instance :-
Same as single task, any activity launched from this activity will start the new task always so single instance activity will not share the same stack with other activities, so OnNewIntent() will be called for every intent.

Define the launch modes in Android Manifest file as below,

<activity
            android:launchMode="singleTop" | "standard" |"singleInstance"|"singleTask"
       
        </activity>



Labels:

Comments

Post a Comment

Popular posts from this blog

Adding Call log entries in Native Call Logs

While adding call logs we can set number in CallLog.Calls.NUMBER field , same for date  and duration. CallLog.Calls.CACHED_NAME will be filled with the cached name in case if the number is already saved in Contacts database. ContentValues values = new ContentValues(); values.put(CallLog.Calls.NUMBER, number); values.put(CallLog.Calls.DATE, System.currentTimeMillis()); values.put(CallLog.Calls.DURATION, 0); values.put(CallLog.Calls.TYPE, CallLog.Calls.OUTGOING_TYPE); //Type of call Outgoing/Incoming/Missed etc values.put(CallLog.Calls.NEW, 1); values.put(CallLog.Calls.CACHED_NAME, ""); values.put(CACHED_NUMBER_TYPE, 0); values.put(CACHED_NUMBER_LABEL, ""); this.getContentResolver().insert(CallLog.Calls.CONTENT_URI, values); Below Permissions are required to add call logs , add it in Manifest file, <uses-permission android:name="android.permission.WRITE_CALL_LOG"></uses-permission> <uses-permission android:name="android.perm...
Post a Comment
Read more

Implementing RecyclerView

I'm working on Android hybrid apps from last 5 years, its very tough to stay in touch with Native android UI, Now I started learning through sample applications, so thought of sharing my learning here.           RecyclerView has came with Material design in Android Lollipop, RecyclerView is advanced, flexible version of Listview, RecyclerView uses the view holder pattern  and improve the performance by reusing off screen views and rebinds them to the data which is scrolling on the screen, now lets see the difference between list view and recyclerview. Difference between RecyclerView and Listview :- 1. RecyclerView forces to use RecyclerView.ViewHolder (Inbuilt view Holder) to hold the elements, to reuse the cells while scrolling, which was optional in Listview which we used to create in adapters getView() method. 2. Animation while adding list items or removing list items are already added in the recyclerview. 3. List views were only of vertical...
Post a Comment
Read more