In this launch mode if an instance of activity already exists at the top of the current task, a new instance will not be created and Android system will route the intent information through onNewIntent(). If an instance is not present on top of task then new instance will be created.
What is single instance Android?
A “singleInstance” activity stands alone as the only activity in its task. If it starts another activity, that activity will be launched into a different task regardless of its launch mode — as if FLAG_ACTIVITY_NEW_TASK was in the intent. In all other respects, the “singleInstance” mode is identical to “singleTask”.
What is back stack in Android?
A task is a collection of activities that users interact with when performing a certain job. The activities are arranged in a stack—the back stack)—in the order in which each activity is opened. … If the user presses the Back button, that new activity is finished and popped off the stack.
What are Android launch modes?
There are four types of launch modes in Android: Standard. SingleTop. SingleTask.
How do I use onNewIntent on Android?
How to use onNewIntent method in android. app. Activity
- WeakReference mActivity;mActivity.get()
- Stack activityStack;activityStack.lastElement()
- (Activity) param.thisObject.
What is Android exported true?
android:exported Whether or not the broadcast receiver can receive messages from sources outside its application — “true” if it can, and “false” if not. If “false”, the only messages the broadcast receiver can receive are those sent by components of the same application or applications with the same user ID.
What are the types of services in Android?
Types of Android Services
- Foreground Services: …
- Background Services: …
- Bound Services: …
- Playing music in the background is a very common example of services in android. …
- Step 1: Create a new project.
- Step 2: Modify strings.xml file. …
- Step 3: Working with the activity_main.xml file. …
- Step 4: Creating the custom service class.
How do I know if my Backstack is empty?
you can use fragment stack while pushing fragments inside it. Use getBackStackEntryCount() to get count. If it is zero, means nothing in backstack.
What is intent flag in Android?
Use Intent Flags
Intents are used to launch activities on Android. You can set flags that control the task that will contain the activity. Flags exist to create a new activity, use an existing activity, or bring an existing instance of an activity to the front. … setFlags(Intent. FLAG_ACTIVITY_CLEAR_TASK | Intent.
What is foreground activity in Android?
An app is considered to be in the foreground if any of the following is true: It has a visible activity, whether the activity is started or paused. It has a foreground service. Another foreground app is connected to the app, either by binding to one of its services or by making use of one of its content providers.
How do I find location on Android?
Help your phone get a more accurate location (Google Location Services a.k.a. Google Location Accuracy)
- Swipe down from the top of the screen.
- Touch and hold Location . If you don’t find Location , tap Edit or Settings . …
- Tap Advanced. Google Location Accuracy.
- Turn Improve Location Accuracy on or off.
What is Intent filter in Android?
An intent filter is an expression in an app’s manifest file that specifies the type of intents that the component would like to receive. For instance, by declaring an intent filter for an activity, you make it possible for other apps to directly start your activity with a certain kind of intent.
What is main activity in Android?
Generally, one activity implements one screen in an app. … Typically, one activity in an app is specified as the main activity, which is the first screen to appear when the user launches the app. Each activity can then start another activity in order to perform different actions.
What is onCreate method in Android?
onCreate is used to start an activity. super is used to call the parent class constructor. setContentView is used to set the xml.
What is the use of Onnewintent in Android?
3 Answers. This is called for activities that set launchMode to “singleTop” in their package, or if a client used the FLAG_ACTIVITY_SINGLE_TOP flag when calling startActivity(Intent). If you set to single top, the activity will not be launched if it is already running at the top of the history stack.
What does finish () do in Android?
When calling finish() on an activity, the method onDestroy() is executed. This method can do things like: Dismiss any dialogs the activity was managing. Close any cursors the activity was managing.