逻辑思想就是利用SharedPreferences进行判断APP是否是第一次启动
分别跳转不同页面
欢迎界面代码:
package com.example.hr_jie;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.PackageInfo;
import android.os.Bundle;
import android.os.Handler;
import android.preference.PreferenceManager;
public class Welcome extends Activity {
private final long SPLASH_LENGTH = 2000;
Handler handler = new Handler();
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.farst_img);
//定义一个setting记录APP是几次启动!!!
SharedPreferences setting = getSharedPreferences("com.example.hr_jie", 0);
Boolean user_first = setting.getBoolean("FIRST", true);
if (user_first) {// 第一次则跳转到欢迎页面
setting.edit().putBoolean("FIRST", false).commit();
tiaozhuanzhu();
} else {//如果是第二次启动则直接跳转到主页面
tiaozhuanfu();
}
}
public void tiaozhuanzhu(){
handler.postDelayed(new Runnable() { //使用handler的postDelayed实现延时跳转
public void run() {
Intent intent = new Intent(Welcome.this, Welcome_four.class);
startActivity(intent);
finish();
}
}, SPLASH_LENGTH);//2秒后跳转至应用主界面MainActivity
}
public void tiaozhuanfu(){
handler.postDelayed(new Runnable() {//使用handler的postDelayed实现延时跳转
public void run() {
Intent intent = new Intent(Welcome.this, MainActivity.class);
startActivity(intent);
finish();
}
}, SPLASH_LENGTH);//2秒后跳转至应用欢迎界面
}
}
本文中共有3个页面:分别为 每次都显示的欢迎页面,只在用户第一次启动APP时的引导界面,和主界面
引导界面代码:
package com.example.hr_jie;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class Welcome_four extends Activity{
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.welcome_only_one);
Button button=(Button) findViewById(R.id.jinruzhuyemian);
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Welcome_four.this, MainActivity.class);
startActivity(intent);
finish();
}
});
}
}