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    <p>you can do like this <strong>onclick of back button.</strong></p> <pre><code>@Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK) { finish();// call finish() on click of back button } return super.onKeyDown(keyCode, event); } </code></pre> <p><strong>for example :</strong> When you <strong>moving from A activity to B activity</strong> using startActivity(new intent(...)); <strong>don't finish or kill A activity, It ll be in stack</strong>.<code>So when you click on back button in B activity you can go back to A activity, which is already in stack.</code></p> <p><strong>when you want to go back to main menu call finish() on every activity when your moving to next activity</strong>.</p> <p><strong>for example :</strong> When you <strong>moving from A activity to B activity</strong> using startActivity(new intent(...)); call <code>finish()</code> to kill A activity.<code>So when you click on back button in B activity you can go back to Main Menu coz every activity ll be killed.</code></p> <p>snippet is here :</p> <pre><code>startActivity(new intent(A.this, B.class)); finish(); // when you click back button on B activity, directly you can go to main menu </code></pre> <p><strong>Updated :</strong> Other way to kill the app using below code on back button pressed. <strong>But not recommended</strong></p> <pre><code> @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK) { android.os.Process.killProcess(android.os.Process.myPid());// Kill the app on click of back button. } return super.onKeyDown(keyCode, event); } </code></pre> <p>hope this might help you to understand the concept.</p>
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    1. POHow to kill process by clicking back button in Android?
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    1. USRahul Baradia
    1. USRahul Baradia
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    1. COSir..thanking you....for this..but i want is that from any activity in the project when i press back button it should kill the process and directly go to main menu...can u please help me for this? thank you sir..!
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      1. USjimmy cool
    2. COsimple.. when your moving to next activity call finish(), so it ll remove from the stack
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      1. USRahul Baradia
    3. COupdated my answer
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      1. USRahul Baradia
 

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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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