Develop Reference

Failed to go back to home screen from Android apps

I have a button in my app named "Go Home" to redirect the user to the home screen. It is working fine without the very first launch. The process of first launch is noted below:
After uploading the APK into SVN I am downloading using the web browser. Then go back to the download folder and installing the app. When install finishes I click on Open. Then In my app I click on the "Go Home" button. The application redirect me to the web browser instead of the home screen. I am tired to search a solution for that.
I am using the following code:
finish();
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
startActivity(intent);
Thanks in advance, Siddiqui Noor

Your app is opening in the task of the browser. Try this:
finish();
Intent intent = new Intent(context, HomeActivity.class);
intent.setAction(Intent.ACTION_MAIN)
.addCategory(Intent.CATEGORY_HOME)
.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);

try adding FLAG_ACTIVITY_NEW_TASK:
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
and also try putting finish() after startActivity

I'm pretty sure that it's not really redirecting you anywhere, it's just closing the Activity. You call finish() after which the intent to start the activity never happens. The app is closed because you've finished the Activity and you end up looking at the screen that was showing before you opened the app. In this case, that is the browser.
Try removing the line to finish();

Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
startActivity(intent);
kill your current activity after redirect the next activity
finish();

Close all activities and come to mobile's home screen

When I press the log out button and come to start(main) screen and when I press the back button from main screen it comes to 2nd screen. but, i want to close the application on click of back button from main screen and close all the activities before that.
while doing research I found,
Intent intent = new Intent(this, Home.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
finish();
but its not satisfying my requirement.

You can use this code that I referred from here How to exit from the application and show the home screen?:
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
Although Android's design does not favor exiting an application by choice.
Related Links:
How to close Android application?
Android exit application

just add line in your code and this will work fine
startActivity(intent);

Finish Current Activity and start a new one

I have a Fragment F. After getting result from a service, F needs to finish the activity it is in and launch a page in the web browser which I do using an intent.
It does seem to work fine if the user presses the back button. However, if he launches the app from recent apps, the activity isn't finished.
I have thought about otherways of doing it. Like finishing the current activity and opening the page from the parent activity. But I'll have to make a lot of changes in the flow. So that would be my last option. Is there any way to make sure that the activity is finished even when I launch it from recent apps?
Intent intent = new Intent(Intent.ACTION_VIEW,Uri.parse(url));
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
getActivity().finish();
Edit: Added code.

try this code for start browser and clear all the stacks of your application
Intent intent = new Intent(); // need to set your Intent View here
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
getActivity().startActivity(intent);
getActivity().finish();
Updated
Try this attribute in your activity in AndroidManifiest.xml file
<activity android:name=".MainActivity"
android:excludeFromRecents="true" ...

use the following code
Intent intent = new Intent(getApplicationContext(), Home.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
this.finish();

Starting Main launcher activity from another activity

my Main launcher activity (the one that has android.intent.action.MAIN as its action) is Login page.
After successful login I started HOME activity and finish() the LOGIN one to prevent users returning to that page by pressing BACK button.
When I press SIGN OUT button, I want the app to return to Login page. But I can't find a way to do it. Here's the sign out code:
//This method is in HOME activity
private void signOut(){
Intent i = new Intent("android.intent.action.MAIN");
startActivity(i);
finish();
}
That code will open dialog box listing all applications in my phone for me to choose. I tried putting the package name + class name (com.example.test.Login) as the Intent but keep getting this error:
android.content.ActivityNotFoundException: No Activity found to handle Intent
I know I can trick this problem by using Splash screen as Main activity. But If there is another better solution, I want to know it.
Thanks

Use
Intent i = new Intent(this, LoginPage.class);
startActivity (i);
finish();

Android Browser Intent back button

Hello I am lauching the browser from my application using an intent such as:
String url = "XXXX";
Intent i = new Intent(Intent.ACTION_VIEW);
i.setData(Uri.parse(url));
startActivity(i);
but when I press back on the browser i want to go back to the my application, instead of going to the options of the browser. how can i control this behaviour?

You can't as the back button implementation is now under control of Browser Application.
Implement a WebView in your application and handle Back Key Pressed is the only option.

Try:
Intent i = new Intent(Intent.ACTION_VIEW);
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
i.setData(Uri.parse(url));
startActivity(i);
A task (from the activity that started it to the next task activity) defines an atomic group of activities that the user can move to. Tasks can be moved to the foreground and background; all of the activities inside of a particular task always remain in the same order. You can find more about it here: http://developer.android.com/guide/components/tasks-and-back-stack.html