android 每隔2秒执行

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android 每隔2秒执行

页面跳转

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

package="com.xingyun.shoopingmail4">

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">

4、activity_mainjava

xmlns:tools=""

android:layout_width="match_parent"

android:layout_height="match_parent"

android:background="#ffffff"

android:orientation="vertical"

tools:context=".activity.MainActivity">

android:id="@+id/frameLayout"

android:layout_width="match_parent"

android:layout_height="0dp"

android:layout_weight="1" />

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">

android:id="@+id/rb_home"

style="@style/MainButtonStyle"

android:drawableTop="@drawable/home_button_selector"

android:text="首页" />

android:id="@+id/rb_type"

style="@style/MainButtonStyle"

android:drawableTop="@drawable/type_button_selector"

android:text="分类" />

android:id="@+id/rb_community"

style="@style/MainButtonStyle"

android:drawableTop="@drawable/community_button_selector"

android:paddingTop="10dp"

android:text="发现" />

android:id="@+id/rb_cart"

style="@style/MainButtonStyle"

android:drawableTop="@drawable/cart_button_selector"

android:text="购物车" />

android:id="@+id/rb_user"

style="@style/MainButtonStyle"

android:drawableTop="@drawable/user_button_selector"

android:text="个人中心" />

5、activity_welcome.java

xmlns: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">

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_centerInParent="true"

android:src="@drawable/logo" />

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：

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