简易Android 引导页

最新推荐文章于 2021-02-26 16:39:21 发布

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本文详细介绍如何在Android应用中实现引导页和首页布局，并通过SharedPreferences进行首次启动判断，使用Handler延迟跳转到主页面，确保用户体验流畅。

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布局文件

1，引导页
activity_guide.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".GuideActivity">


    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="引导页"
        android:layout_centerInParent="true"
        android:textSize="50sp"/>
</RelativeLayout>

2,首页
activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="首页"
        android:layout_centerInParent="true"
        android:textSize="50sp"/>

</RelativeLayout>

java代码

GuideActivity

package com.example.a20191q;

import android.content.Intent;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class GuideActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_guide);

        Handler handler = new Handler();
        handler.postDelayed(new Runnable() {
            @Override
            public void run() {
                startActivity(new Intent(GuideActivity.this, MainActivity.class));
                finish();
            }
        }, 3000);
    }
}

MainActivity

package com.example.a20191q;

import android.content.Intent;
import android.content.SharedPreferences;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

    public SharedPreferences preferences;
    public SharedPreferences.Editor editor;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        preferences = getSharedPreferences("data", MODE_PRIVATE);
        editor = preferences.edit();
        if(preferences.getBoolean("first",true)){
            editor.putBoolean("first", false);
            editor.apply();
            startActivity(new Intent(MainActivity.this,GuideActivity.class) );
            finish();
        }
    }
}