Android判斷介面

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     仿造，第一次進入去引導介面，否則進啟動介面。

package edu.hpu.init;
import edu.hpu.logic.R;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
public class TellActivity extends Activity {
boolean isFirstIn = false;
private static final int GO_HOME = 1000;
private static final int GO_GUIDE = 1001;
// 延遲3秒
private static final long delayTime = 3000;
private static final String spName = "first_pref";
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case GO_HOME:
goHome();
break;
case GO_GUIDE:
goGuide();
break;
}
super.handleMessage(msg);
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.splash);
init();
}
private void init() {
// 讀取SharedPreferences中需要的資料
// 使用SharedPreferences來記錄程式的使用次數
//介面，MODE_PRIVATE指定該SharedPreferences資料只能被本應用程式讀、寫
SharedPreferences preferences = getSharedPreferences(
spName, MODE_PRIVATE);
SharedPreferences.Editor editor; 
editor = preferences.edit();
// 取得相應的值，如果沒有該值，說明還未寫入，用true作為預設值
isFirstIn = preferences.getBoolean("isFirstIn", true);
// 判斷程式第幾次運行，如果是第一次運行則跳轉到引導介面，否則跳轉到主介面
if (!isFirstIn) {
mHandler.sendEmptyMessageDelayed(GO_HOME, delayTime);
} else {
// 使用Handler的postDelayed方法，3秒後執行GuideActivity
mHandler.sendEmptyMessageDelayed(GO_GUIDE, delayTime);
editor.putBoolean("isFirstIn", false);
editor.commit();
}
}
private void goHome() {
Intent intent = new Intent(this, StartActivity.class);
startActivity(intent);
this.finish();
}
private void goGuide() {
Intent intent = new Intent(this, GuideActivity.class);
startActivity(intent);
this.finish();
}
}