How can I disable the backward button in the activity in android

Question

Consider we have an activity that in that we load a webview. Now I want to disable the backward button in this activity whether hardware and whether software in all the android versions.

Answer 1

If you are targeting below API android.os.Build.VERSION_CODES.ECLAIR, please do this,

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
     if (keyCode == KeyEvent.KEYCODE_BACK) {

         return true;
     }
     return super.onKeyDown(keyCode, event);    
}

If you are targeting higher APIs, then do this in your Activity,

@Override
public void onBackPressed() {
    // Do something here or leave it blank
}

If you want to perform some operation, put some code there or just leave it blank to block back button press.

Answer 2

You only need to call onBackPressed and leave empty in your activity class

@Override
public void onBackPressed() {
}