Android 按HOME键和返回键响应

Android 按HOME键和返回键响应

public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK ) {Toast.makeText(this, "按返回键退出程序", Toast.LENGTH_SHORT).show();finish();                                 System.exit(0); } else if (keyCode == KeyEvent.KEYCODE_HOME) {Toast.makeText(this, "按HOME键退出程序", Toast.LENGTH_SHORT).show();}return false;}