问题描述
我有下面的类， SplashActivity.java
public class SplashScreen extends Activity{
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.splash);
Thread timer = new Thread(){
public void run(){
try{
sleep(5000);
}catch(InterruptedException e)
{
e.printStackTrace();
}
finally{
Intent tutorial = new Intent(SplashScreen.this, TutorialOne.class);
startActivity(tutorial);
}
}
};
timer.start();
}
}
我想这个活动只加载一次，当应用程序第一次安装，第一次在移动设备上。作为新到Android我对这个非常小的想法。我读的地方，该共享preferences 将被使用，但不明白的实施。而关于本次活动的一点是，该活动已经作为一个启动首次使用的时候，这就是真正搞糊涂了。因为在清单文件我声明另一个活动这在我的情况下，将是 MainPage.java 。那么，如何实现这个逻辑？难道我在 MainPage的呼吁 SplashActivity 还是有别的东西是必须做的？请帮助别人？
I want this activity to load only once, when the app is first installed on the mobile device for the first time. Being new to android I have very little idea about this. I read in places that the SharedPreferences is to be used, but did not understand the implementation. And the thing about this activity is that, the activity has to act as a Launcher when used for the first time, that's what really confused me. Because in the manifest file I am declaring another activity which in my case would be the MainPage.java. So how can I implement this logic ?? Do I call upon the SplashActivity in the MainPage or is there something else that must be done ?? Please help someone ?
有人请写下code。如果可以实现这个逻辑？在先进的感谢。
Can someone please write down the code to implement this logic if possible ?? Thanks in advanced.
推荐答案
将此code到您的onCreate方法
Add this code to your onCreate method
SharedPreferences pref = getSharedPreferences("ActivityPREF", Context.MODE_PRIVATE);
if(pref.getBoolean("activity_executed", false)){
Intent intent = new Intent(this, TutorialOne.class);
startActivity(intent);
finish();
} else {
Editor ed = pref.edit();
ed.putBoolean("activity_executed", true);
ed.commit();
}
共享preferences将继续在每次执行，除非你清理你的Andr oid从设置中的数据的应用程序的时间。第一次是打算从一个boolean（activity_executed）保存在这样的preferences（活动preF）时获得的价值。
SharedPreferences will be keep every time you execute the app unless you clean the data from Settings on your Android.The first time is going to get the value from a boolean (activity_executed) saved on such preferences (ActivityPREF).
如果没有找到任何值将返回假的，所以我们要编辑preference并将其值设置为true。接下来的执行将推出活动 TutorialOne 。
If it does not find any value it will return false, so we have to edit the preference and set the value to true.The next execution will launch the activity TutorialOne.
完成（）删除从堆栈历史记录当前的活动，所以没有可能是用按键回程从TutorialOne回来。
finish() erases the current activity from the stack history, so no come back is possible using button back from TutorialOne.
关于你的清单，你可以把这个actitiy与
About your manifest, you can set this actitiy with
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
每一个应用程序被执行将推出这个活动的时间，但由于对activity_executed将要开始一个新的活动<$ C $的真实设置好的C> startActivity 。
Every time the app is executed will launch this activity, but due to the true setted on the "activity_executed" is going to start a new activity with startActivity.
这篇关于制作活动只出现一次，当应用程序启动的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！