Android学习总结——欢迎页和导航页的实现

activity_welcome.xml

<?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:orientation="vertical"
    tools:context="com.example.sssss.fllm.Welcome">

    <ImageView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/imageView"
        android:scaleType="fitXY"
        android:src="@drawable/welcome"
        />
</LinearLayout>

activity_guide.xml

<?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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.sssss.fllm.Guide">

    <android.support.v4.view.ViewPager
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:id="@+id/viewPage"/>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:gravity="center_horizontal"
        android:layout_alignParentBottom="true"
        android:id="@+id/ll">

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/iv1"
            android:src="@drawable/login_point_selected"/>
        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/iv2"
            android:src="@drawable/login_point"/>
        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/iv3"
            android:src="@drawable/login_point"/>

    </LinearLayout>

</RelativeLayout>

view1.xml

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

    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/imageView1"
        android:background="@drawable/guide_1"/>
</LinearLayout>

view2.xml

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

    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/imageView2"
        android:background="@drawable/guide_2"/>
</LinearLayout>

view3.xml

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

    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/imageView3"
        android:background="@drawable/guide_3"/>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center_horizontal"
        android:orientation="horizontal" >

    </LinearLayout>

    <Button
        android:id="@+id/btnStart"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="点击进入>>>"
        android:layout_marginBottom="41dp"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true" />

</RelativeLayout>

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.sssss.fllm">
<uses-permission android:name="android.permission.INTERNET"/>
    <application
        android:allowBackup="true"
        android:icon="@drawable/kunyi"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@android:style/Theme.NoTitleBar.Fullscreen">
        mipmap
        <activity
            android:name=".Welcome">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

</manifest>

Welcome.java

package com.example.sssss.fllm;

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.Uri;
import android.os.Handler;
import android.os.Message;
import android.os.Bundle;

public class Welcome extends Activity {
    //设置延时时间
    private static final int TIME=2000;
    //通过参数来决定跳转哪一个界面
    private static final int GO_KYTeach=1000;
    private static final int GO_GUIDE=1001;
    //判断handler发送了什么消息
    private boolean isFirstIn=false;

    //等待的时间不能让其在主线程中沉睡，应通过Handler来进行沉睡
    private Handler handler=new Handler(){
        @Override
        public void handleMessage(Message msg) {
            switch (msg.what){
                case GO_KYTeach:
                    goHome();
                    break;
                case GO_GUIDE:
                    goGuide();
                    break;
            }
        }
    };

    private void init(){
        //获取
        SharedPreferences perferences=getPreferences(MODE_PRIVATE);
        isFirstIn=perferences.getBoolean("isFirstIn",true);
        if(!isFirstIn){
            handler.sendEmptyMessageDelayed(GO_KYTeach,TIME);
        }else {
            handler.sendEmptyMessageDelayed(GO_GUIDE,TIME);
            //储存
            SharedPreferences.Editor editor=perferences.edit();
            editor.putBoolean("isFirstIn",false);
            //提交
            editor.commit();
        }
    }

    public void goHome(){
    }
    public void goGuide(){
        Intent intent=new Intent(Welcome.this,Guide.class);
        startActivity(intent);
        finish();
    }

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

}

Guide.java

package com.example.sssss.fllm;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;

import java.util.ArrayList;
import java.util.List;

public class Guide extends Activity implements ViewPager.OnPageChangeListener {

    private Button btnStart;
    private ViewPager viewPager;
    private View view1, view2, view3;
    private List<View> viewList;//view数组
    private PagerAdapter pagerAdapter;
    private ImageView[] dots;
    private int[] ids={R.id.iv1,R.id.iv2,R.id.iv3};

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

        pagerAdapter = new PagerAdapter(){

            @Override
            public int getCount() {
                return viewList.size();
            }

            @Override
            public boolean isViewFromObject(View view, Object object) {
                return view==object;
            }

            @Override
            public void destroyItem(ViewGroup container, int position, Object object) {
                //super.destroyItem(container, position, object);
                container.removeView(viewList.get(position));
            }

            @Override
            public Object instantiateItem(ViewGroup container, int position) {
                //return super.instantiateItem(container, position);
                container.addView(viewList.get(position));
                return viewList.get(position);
            }
        };

        initView();
        initDots();
    }

    public void initView(){
        viewPager= (ViewPager) findViewById(R.id.viewPage);
        LayoutInflater inflater=getLayoutInflater().from(this);
        view1 = inflater.inflate(R.layout.view1, null);
        view2 = inflater.inflate(R.layout.view2,null);
        view3 = inflater.inflate(R.layout.view3, null);

        viewList = new ArrayList<View>();// 将要分页显示的View装入数组中
        viewList.add(view1);
        viewList.add(view2);
        viewList.add(view3);

        viewPager.setAdapter(pagerAdapter);
        viewPager.setOnPageChangeListener(this);

        btnStart= (Button)viewList.get(2).findViewById(R.id.btnStart);
        btnStart.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

            }
        });
    }

    public void initDots(){
        dots=new ImageView[viewList.size()];
        for(int i=0;i<viewList.size();i++){
            dots[i]= (ImageView) findViewById(ids[i]);
        }
    }

    @Override
    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

    }

    @Override
    public void onPageSelected(int position) {

        for (int i=0;i<ids.length;i++){
            if(position==i){
                dots[i].setImageResource(R.drawable.login_point_selected);
            }else {
                dots[i].setImageResource(R.drawable.login_point);
            }
        }
    }

    @Override
    public void onPageScrollStateChanged(int state) {

    }
}