新手笔记,仅供参考!
首先定义三个页面
随后写3个activity定义功能
package com.example.administrator.mypagelead;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
public class MainActivity extends AppCompatActivity {
private SharedPreferences sharedPreferences;
private SharedPreferences.Editor editor;
// 判断是否是首次登陆
private boolean isFirst;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sharedPreferences=getSharedPreferences("phone", Context.MODE_PRIVATE);
editor=sharedPreferences.edit();
isFirst=sharedPreferences.getBoolean("frist",true);
}
//欢迎页按钮
public void huanyingye(View v){
if(isFirst==true){//第一次登陆
editor.putBoolean("frist",false);
editor.commit();
//跳转到
Intent intent=new Intent(this,Main2Activity.class);
startActivity(intent);
}else {
// 跳转到
Intent intent=new Intent(this,Main3Activity.class);
startActivity(intent);
}
}
}
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3.