重写
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
Intent home = new Intent(Intent.ACTION_MAIN);
home.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
home.addCategory(Intent.CATEGORY_HOME);
startActivity(home);
return true;
}
return super.onKeyDown(keyCode, event);
}
