Android application force closed while exiting the application

Question

Another problem in my android application. When i click on home button, it exits from the application but saying Sorry, the application has stopped unexpectedly

The code for my home button is

ImageView home  =   (ImageView)findViewById(R.id.home1);
    home.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            kalma1.stop();
            Intent i =new Intent(Kalma1.this, null);
            i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
            finish();
        }
    });

and the console says the following

GC_EXTERNAL_ALLOC freed 1110 objects / 70984 bytes in 77ms
Shutting down VM
threadid=1: thread exiting with uncaught exception (group=0x4001d800)
FATAL EXCEPTION: main
java.lang.NullPointerException
at android.content.ComponentName.<init>(ComponentName.java:76)
at android.content.Intent.<init>  (Intent.java:2678)
at com.kalmas.Kalma1$5.onClick(Kalma1.java:74)
at android.view.View.performClick(View.java:2408)
at android.view.View$PerformClick.run(View.java:8816)
at android.os.Handler.handleCallback(Handler.java:587)
at  android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:4627)
at  java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
at dalvik.system.NativeStart.main(Native Method)
Sending signal. PID: 368 SIG: 9

Make sure this line Intent i =new Intent(Kalma1.this, null); — Aerrow, Jun 05 '12 at 08:51
write like this Intent i =new Intent(Kalma1.this, YourNextActivity.java); instead of Intent i =new Intent(Kalma1.this, null); — Aerrow, Jun 05 '12 at 08:52
yes i don't want to call another activity. just want to exit from the application — baig772, Jun 05 '12 at 08:52

score 3 · Accepted Answer · answered Jun 05 '12 at 08:54

3

If you want to finish only that activity then dont use any intent just write finish()

home.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub

            finish();
        }
    });

answered Jun 05 '12 at 08:54

Niranj Patel

32,980
10
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@baig772 Hmm just remember this & enjoy Android – Niranj Patel Jun 05 '12 at 09:01
sure, next time i will definitely remember this :) – baig772 Jun 05 '12 at 09:03

score 0 · Answer 2 · edited May 23 '17 at 10:09

0

Intent i =new Intent(Kalma1.this, null);

is the prime cause of this NullPointerException.

You have to mention the name of the activity to which you want to navigate as second parameter.

EDIT

Android's design does not favor exiting an application by choice, but rather manages it by the OS. You can bring up the Home application by its corresponding Intent:

Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);

instead of

Intent i =new Intent(Kalma1.this, null);

Refer this question on SO

edited May 23 '17 at 10:09

Community

1
1

answered Jun 05 '12 at 08:53

GAMA

5,958
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I don't want to call any other activity. Just want to exit from the current activity that's why used null – baig772 Jun 05 '12 at 08:54
1

okay. Then you have to just call built-in method : `finish()` – GAMA Jun 05 '12 at 08:56

score 0 · Answer 3 · answered Jun 05 '12 at 08:54

You should call it as below to finish your current activity:

home.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            kalma1.stop();
            //Intent i =new Intent(Kalma1.this, null);
            //i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
            finish();
        }
    });

Android application force closed while exiting the application

3 Answers3

EDIT