覆盖android硬件后退按钮功能

Question

Can we override hardware back button functionality. I am bit confused about this kindly help me.

Answer 1

You can also override onBackPressed() :

@Override
public void onBackPressed(){
    //Your action
}

Answer 2

@Override public void onBackPressed(){
  //do your stuff here
}

if anything related to particular key then you can go for this:

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.Any_Key_Code) {
        //your stuff here
        return true;
    }
    return super.onKeyDown(keyCode, event);
}

Answer 3

see this

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

        Toast.makeText(getApplicationContext(), "back button pressed",
                Toast.LENGTH_SHORT).show();
        return true;
    }

    return super.onKeyDown(keyCode, event);
}

Answer 4

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
        // do your stuff here
        return true;
    }
    return super.onKeyDown(keyCode, event);
}

Answer 5

@Override
public void onBackPressed() {
    //  Action to be performed 
    super.onBackPressed(); 
}