How to finish current activity in Android

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最佳答案

If you are doing a loading screen, just set the parameter to not keep it in activity stack. In your manifest.xml, where you define your activity do:

<activity android:name=".LoadingScreen" android:noHistory="true" ... />

And in your code there is no need to call .finish() anymore. Just do startActivity(i);

There is also no need to keep a instance of your current activity in a separate field. You can always access it like LoadingScreen.this.doSomething() instead of private LoadingScreen loadingScreen;

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You need to call finish() from the UI thread, not a background thread. The way to do this is to declare a Handler and ask the Handler to run a Runnable on the UI thread. For example:

public class LoadingScreen extends Activity{
private LoadingScreen loadingScreen;
Intent i = new Intent(this, HomeScreen.class);
Handler handler;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
handler = new Handler();
setContentView(R.layout.loading);


CountDownTimer timer = new CountDownTimer(10000, 1000) //10seceonds Timer
{
@Override
public void onTick(long l)
{


}


@Override
public void onFinish()
{
handler.post(new Runnable() {
public void run() {
loadingScreen.finishActivity(0);
startActivity(i);
}
});
};
}.start();
}
}

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I tried using this example but it failed miserably. Every time I use to invoke finish()/ finishactivity() inside a handler, I end up with this menacing java.lang.IllegalAccess Exception. i'm not sure how did it work for the one who posed the question.

Instead the solution I found was that create a method in your activity such as

void kill_activity()
{
finish();
}

Invoke this method from inside the run method of the handler. This worked like a charm for me. Hope this helps anyone struggling with "how to close an activity from a different thread?".

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Just call the finish() method:

context.finish();

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When you want start a new activity and finish the current activity you can do this:

API 11 or greater

Intent intent = new Intent(OldActivity.this, NewActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);

API 10 or lower

Intent intent = new Intent(OldActivity.this, NewActivity.class);
intent.setFlags(IntentCompat.FLAG_ACTIVITY_NEW_TASK | IntentCompat.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);

I hope this can help somebody =)

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You can also use: finishAffinity()

Finish this activity as well as all activities immediately below it in the current task that have the same affinity.

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I found many answers but not one is simple... I hope this will help you...

try{
Intent intent = new Intent(CurrentActivity.this, NewActivity.class);
startActivity(intent);
} finally {
finish();
}

Very simple logic is here, as we know that in java we write code that has some chances of exception in a try block and handle that exception in catch block but in finally block we write code that has to be executed in any cost (Either the exception comes or not).

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What I was doing was starting a new activity and then closing the current activity. So, remember this simple rule:

finish()
startActivity<...>()

and not

startActivity<...>()
finish()

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Use

.finish();

for finishing Activity

Give Context First Like:

getApplicationContext.finish();

Or

context.finish();

You Can Call it anywhere you want to like in

OnClickListener of Button

of Button or in

OnBackPressed(); Method

And If you want to finish the App then Use

finishAffinity();