Android欢迎页面2秒钟后自动跳转到主页面

一、功能介绍

打开APP先进入欢迎页面，2秒钟后自动进入主页面

二、项目结构分析

三、详细代码

1、WelcomeActivity.java

package com.xingyun.shoopingmail4;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;

import com.xingyun.shoopingmail4.activity.MainActivity;

public class WelcomeActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_welcome);
        //两秒钟进入主页面
        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                //执行在主线程
                //启动主页面
                startActivity(new Intent(WelcomeActivity.this,MainActivity.class));
                //关闭当前页面
                finish();
            }
        },2000);
    }
}

2、MainActivity.java

package com.xingyun.shoopingmail4.activity;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.FrameLayout;
import android.widget.RadioButton;
import android.widget.RadioGroup;

import com.xingyun.shoopingmail4.R;

import butterknife.Bind;
import butterknife.ButterKnife;

public class MainActivity extends AppCompatActivity {

    @Bind(R.id.frameLayout)
    FrameLayout frameLayout;
    @Bind(R.id.rg_main)
    RadioGroup rgMain;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);
        rgMain.check(R.id.rb_home);
    }
}

3、AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.xingyun.shoopingmail4">

    <application
        android:allowBackup="true"
        android:icon="@drawable/logo"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".WelcomeActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".activity.MainActivity"></activity>
    </application>

</manifest>

4、activity_mainjava

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#ffffff"
    android:orientation="vertical"
    tools:context=".activity.MainActivity">

    <!---->
    <FrameLayout
        android:id="@+id/frameLayout"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" />

    <!---->
    <RadioGroup
        android:id="@+id/rg_main"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:background="@drawable/home_bottom_parent_bg"
        android:orientation="horizontal">

        <!---->
        <RadioButton
            android:id="@+id/rb_home"
            style="@style/MainButtonStyle"
            android:drawableTop="@drawable/home_button_selector"
            android:text="首页" />

        <RadioButton
            android:id="@+id/rb_type"
            style="@style/MainButtonStyle"
            android:drawableTop="@drawable/type_button_selector"
            android:text="分类" />

        <!---->
        <RadioButton
            android:id="@+id/rb_community"
            style="@style/MainButtonStyle"
            android:drawableTop="@drawable/community_button_selector"
            android:paddingTop="10dp"
            android:text="发现" />

        <RadioButton
            android:id="@+id/rb_cart"
            style="@style/MainButtonStyle"
            android:drawableTop="@drawable/cart_button_selector"
            android:text="购物车" />

        <RadioButton
            android:id="@+id/rb_user"
            style="@style/MainButtonStyle"
            android:drawableTop="@drawable/user_button_selector"
            android:text="个人中心" />
    </RadioGroup>

</LinearLayout>

5、activity_welcome.java

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_welcome"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:background="#ffffff"
    tools:context=".WelcomeActivity">

    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:src="@drawable/logo" />
</RelativeLayout>

6、build.gradle

apply plugin: ‘com.android.application‘

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.xingyun.shoopingmail4"
        minSdkVersion 16
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
        javaCompileOptions { annotationProcessorOptions { includeCompileClasspath = true } }
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile(‘proguard-android.txt‘), ‘proguard-rules.pro‘
        }
    }
}

dependencies {
    implementation fileTree(dir: ‘libs‘, include: [‘*.jar‘])
    implementation ‘com.android.support:appcompat-v7:28.0.0‘
    implementation ‘com.android.support.constraint:constraint-layout:1.1.3‘
    testImplementation ‘junit:junit:4.12‘
    androidTestImplementation ‘com.android.support.test:runner:1.0.2‘
    androidTestImplementation ‘com.android.support.test.espresso:espresso-core:3.0.2‘
    implementation ‘com.jakewharton:butterknife:7.0.1‘
}

四、运行结果

————>2秒钟后自动跳转到下面的界面：

Android欢迎页面2秒钟后自动跳转到主页面

原文：http://blog.51cto.com/doublelinux/2340085