Android程序退出处理

程序退出处理

 

 

public class SplashScreen extends AppCompatActivity {

private static long SPLASH_MILLIS = 1000;

ImageView image1;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

 

requestWindowFeature(Window.FEATURE_NO_TITLE);

getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,

WindowManager.LayoutParams.FLAG_FULLSCREEN);

 

LayoutInflater inflater = LayoutInflater.from(this);

LinearLayout layout = (LinearLayout) inflater.inflate(

R.layout.splashscreen, null, false);

 

addContentView(layout, new WindowManager.LayoutParams(WindowManager.LayoutParams.MATCH_PARENT,

WindowManager.LayoutParams.MATCH_PARENT));

 

final Handler handler = new Handler();

handler.postDelayed(new Runnable() {

@Override

public void run() {

Intent intent = new Intent(SplashScreen.this, MainActivity.class);

startActivity(intent);

finish();

}

}, SPLASH_MILLIS);

}

}

 

 

//上次按下返回键的系统时间

private long lastBackTime = 0;

//当前按下返回键的系统时间

private long currentBackTime = 0;

@Override

public boolean onKeyDown(int keyCode, KeyEvent event) {

//捕获返回键按下的事件

if(keyCode == KeyEvent.KEYCODE_BACK){

//获取当前系统时间的毫秒数

currentBackTime = System.currentTimeMillis();

//比较上次按下返回键和当前按下返回键的时间差，如果大于2秒，则提示再按一次退出

if(currentBackTime - lastBackTime > 2 * 1000){

Toast.makeText(this, "再按一次返回键退出", Toast.LENGTH_SHORT).show();

lastBackTime = currentBackTime;

}else{ //如果两次按下的时间差小于2秒，则退出程序

//int pid = android.os.Process.myPid(); //获取当前应用程序的PID

//android.os.Process.killProcess(pid); //杀死当前进程

this.finish();

}

return true;

}

return super.onKeyDown(keyCode, event);

}

 

拦截回退操作

@Override

public void onBackPressed() {

    Intent MyIntent = new Intent(Intent.ACTION_MAIN);

    MyIntent.addCategory(Intent.CATEGORY_HOME);

    startActivity(MyIntent);

}