Android中5秒后执行函数 [英] Execute function after 5 seconds in Android

问题描述

我是 android 开发的新手，现在我的启动器活动只显示 5 秒，之后我想检查用户是否登录或未运行并执行操作.

I am new in android development and now my launcher activity show only 5 seconds and after that I want to check the user is logged in or not function and perform the actions.

这是我的代码.

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    exactPreferences = getSharedPreferences("ExactPreference",MODE_PRIVATE);
    setContentView(R.layout.activity_landing_page);

    session = exactPreferences.getString(Model.getSingleton().SHARED_SESSION_ID,null);
    Log.i("Session Id",session);
        displayData(); // I want to perform this function after 5 seconds.
}


private void displayData() {
    if(session.equals("")){
        Intent loginIntent = new Intent(LandingPage.this,
                LoginActivity.class);
        startActivity(loginIntent);
        Log.i("User Logged In", "False");
    }
    else
    {
        Intent objIntent = new Intent(LandingPage.this,
                IndexPageActivity.class);
        startActivity(objIntent);
        Log.i("User Logged In", "True");
    }

}

推荐答案

你可以使用Handler来增加一些延迟.调用方法displayData()如下，这样它会在5后执行秒.

You can use the Handler to add some delay.Call the method displayData() as below so that it will be executed after 5 seconds.

new Handler().postDelayed(new Runnable() {
        @Override
        public void run() {
          displayData();
        }
    }, 5000);

注意:不要使用像 Thread.sleep(5000); 这样的线程，因为它会阻塞您的 UI 并使其无响应.

Note : Do not use the threads like Thread.sleep(5000); because it will block your UI and and makes it irresponsive.

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