穆易天气app代码（一）

代码只是随意写写，有些地方有些冗余，且观赏度不高，发表只为记录一下。
主体界面的布局代码，其余布局代码会单独出一篇
传送门：布局

<?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:id="@+id/LinerLayout1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainPage"
    android:orientation="vertical">
    <androidx.viewpager.widget.ViewPager
        android:id="@+id/vpager_four"
        android:layout_width="wrap_content"
        android:layout_height="0dp"
        android:layout_gravity="center"
        android:layout_weight="1.0"
        android:flipInterval="30"
        android:persistentDrawingCache="animation" />
    <ImageView
        android:id="@+id/img_cursor"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:scaleType="matrix"
        android:src="@mipmap/line" />
    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="48dp"
        android:background="#ffffff">

        <TextView
            android:id="@+id/main_one"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_weight="1.0"
            android:gravity="center"
            android:text="天气"
            android:textColor="#000000" />

        <TextView
            android:id="@+id/main_two"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_weight="1.0"
            android:gravity="center"
            android:text="天气备忘录"
            android:textColor="#000000" />

        <TextView
            android:id="@+id/main_three"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_weight="1.0"
            android:gravity="center"
            android:text="发现"
            android:textColor="#000000" />

        <TextView
            android:id="@+id/main_four"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_weight="1.0"
            android:gravity="center"
            android:text="个人信息"
            android:textColor="#000000" />

    </LinearLayout>
</LinearLayout>

主体界面代码，确保了app的主体框架，实现天气查询功能，及中国天气官网查看功能。

package com.example.theapp;

import androidx.appcompat.app.AppCompatActivity;
import androidx.viewpager.widget.ViewPager;
import android.annotation.SuppressLint;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.graphics.Matrix;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.text.TextUtils;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.TextView;
import android.widget.Toast;

import com.example.theapp.DataBase.Dao;
import com.example.theapp.ToolClass.ListItem;
import com.example.theapp.ToolClass.MyPagerAdapter;
import com.example.theapp.ToolClass.StreamTool;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;


public class MainPage extends  AppCompatActivity
        implements ViewPager.OnPageChangeListener, View.OnClickListener {
//整体框架控件
    private ViewPager vpager_four;
    private ImageView img_cursor;
    private TextView main_one,main_two,main_three,main_four;
    //个人信息控件
     private Button nicheng;
    private Button zhuxiao;
    private Button code;
     private ImageButton image;
     private TextView name;
     private int flag;
     //天气界面控件
    private EditText cityname;
    private TextView search_city,weather,temp,aqi,cloud;
    private Button search;
    private ListView listV;
    private LinearLayout linearLayout;
    final String[] con = new String[11];
    //天气备忘录界面控件
    private EditText add_city;
    private Button add;
    private ListView list_view;
    private List<ListItem> itemList=new ArrayList<>();
    private String[] content=new String[11];
    //工具界面控件
    private Button joke,history;

    private ArrayList<View>   listViews;
    private int offset = 0;//移动条图片的偏移量
    private int currIndex = 0;//当前页面的编号
    private int bmpWidth;// 移动条图片的长度
    private int one = 0; //移动条滑动一页的距离
    private int two = 0; //滑动条移动两页的距离
    private int three = 0; //滑动条移动两页的距离

@SuppressLint("HandlerLeak")
private Handler handler=new Handler(){
    public void handleMessage(android.os.Message message){
        JSONObject jsonObject= (JSONObject) message.obj;
        try {
            con[0] = jsonObject.getString("reason");
            JSONObject result = jsonObject.getJSONObject("result");
            con[1] = result.getString("city");
            JSONObject realtime = result.getJSONObject("realtime");
            con[2] = realtime.getString("info") ;
            String regx1=".*雨.*";
            String regx2=".*晴.*";
            String regx3=".*阴.*";
            String regx4=".*雪.*";
            if( con[2].matches(regx1)){
               linearLayout.setBackgroundResource(R.drawable.rain);
            }else if(con[2].matches(regx2)){
                linearLayout.setBackgroundResource(R.drawable.sun);
            }else if(con[2].matches(regx3)){
                linearLayout.setBackgroundResource(R.drawable.cloudy);
            }else if(con[2].matches(regx4)){
                linearLayout.setBackgroundResource(R.drawable.snow);
            }else
            {
                linearLayout.setBackgroundResource(R.drawable.back);
            }
            con[3] = realtime.getString("temperature");
            con[4] ="空气质量："+ realtime.getString("aqi");
            con[5] ="风力："+ realtime.getString("direct") + " 等级：" + realtime.getString("power");
            JSONArray array=result.getJSONArray("future");
            JSONObject jsonObject1=array.getJSONObject(1);
            JSONObject jsonObject2=array.getJSONObject(2);
            JSONObject jsonObject3=array.getJSONObject(3);
            JSONObject jsonObject4=array.getJSONObject(4);
            con[6]="日期："+jsonObject1.getString("date")+"  最低/最高温度："+jsonObject1.getString("temperature")
                    +"  天气情况："+jsonObject1.getString("weather")+"  风力:等级："+jsonObject1.getString("direct");
            con[7]="日期："+jsonObject2.getString("date")+"  最低/最高温度："+jsonObject2.getString("temperature")
                    +"  天气情况："+jsonObject2.getString("weather")+"  风力:等级："+jsonObject2.getString("direct");
            con[8]="日期："+jsonObject3.getString("date")+"  最低/最高温度："+jsonObject3.getString("temperature")
                    +"  天气情况："+jsonObject3.getString("weather")+"  风力:等级："+jsonObject3.getString("direct");
            con[9]="日期："+jsonObject4.getString("date")+"  最低/最高温度："+jsonObject4.getString("temperature")
                    +"  天气情况："+jsonObject4.getString("weather")+"  风力:等级："+jsonObject4.getString("direct");
            search_city.setText(con[1]);
            weather.setText(con[2]);
            temp.setText(con[3]);
            aqi.setText(con[4]);
            cloud.setText(con[5]);
            listV.setAdapter(new BaseAdapter() {
                @Override
                public int getCount() {
                    return 5;
                }
                @Override
                public Object getItem(int position) {
                    return null;
                }
                @Override
                public long getItemId(int position) {
                    return 0;
                }
                @Override
                public View getView(int position, View convertView, ViewGroup parent) {
                    TextView textView=new TextView(MainPage.this);
                    textView.setTextSize(20);
                    textView.setTextColor(Color.parseColor("#FF0D29"));
                    textView.setText(con[position+6]);
                    return textView;
                }
            });
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }
};
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_page);
            init();
    }
    public void init(){
        //主体界面初始化
        vpager_four =findViewById(R.id.vpager_four);
        main_one =findViewById(R.id.main_one);
        main_two = findViewById(R.id.main_two);
        main_three = findViewById(R.id.main_three);
        main_four =findViewById(R.id.main_four);
        img_cursor =findViewById(R.id.img_cursor);

        //下划线动画的相关设置：
        bmpWidth = BitmapFactory.decodeResource(getResources(), R.mipmap.line).getWidth();// 获取图片宽度
        DisplayMetrics dm = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(dm);
        int screenW = dm.widthPixels;// 获取分辨率宽度
        offset = (screenW / 4 - bmpWidth) / 2;// 计算偏移量
        Matrix matrix = new Matrix();
        matrix.postTranslate(offset, 0);
        img_cursor.setImageMatrix(matrix);// 设置动画初始位置
        //移动的距离
        one = offset * 2 + bmpWidth;// 移动一页的偏移量,比如1->2,或者2->3
        two = one * 2;// 移动两页的偏移量,比如1直接跳3
        three=one*3;

        //往ViewPager填充View，同时设置点击事件与页面切换事件
        listViews = new ArrayList<View>();
        LayoutInflater mInflater = getLayoutInflater();
        listViews.add(mInflater.inflate(R.layout.view_weather, null, false));
        listViews.add(mInflater.inflate(R.layout.view_two, null, false));
        listViews.add(mInflater.inflate(R.layout.view_find, null, false));
        listViews.add(mInflater.inflate(R.layout.view_personalmessage, null, false));
        vpager_four.setAdapter(new MyPagerAdapter(listViews));
        vpager_four.setCurrentItem(0);          //设置ViewPager当前页，从0开始算
        //四个页面的点击事件
        main_one.setOnClickListener(this);
        main_two.setOnClickListener(this);
        main_three.setOnClickListener(this);
        main_four.setOnClickListener(this);
        vpager_four.addOnPageChangeListener( this);
    }
    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            //天气查询界面
            case R.id.main_one:
                vpager_four.setCurrentItem(0);
                cityname=findViewById(R.id.city_name);
                search_city=findViewById(R.id.search_city);
                weather=findViewById(R.id.weather);
                temp=findViewById(R.id.temp);
                aqi=findViewById(R.id.aqi);
                cloud=findViewById(R.id.cloud);
                search=findViewById(R.id.search);
                listV=findViewById(R.id.lv);
                linearLayout=findViewById(R.id.LinerLayout_weather);
                search.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        String cn = cityname.getText().toString().trim();
                        if (TextUtils.isEmpty(cn)) {
                            Toast.makeText(MainPage.this, "请输入正确的城市名称！", Toast.LENGTH_SHORT).show();
                            linearLayout.setBackgroundResource(R.drawable.back);
                            return;
                        }else{
                            final String city_name = cityname.getText().toString();
                            getData(city_name);
                            linearLayout.invalidate();
                        }
                    }
                });

                listV.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                    @Override
                    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                        final AlertDialog.Builder builder=new Builder(MainPage.this);
                        builder.setIcon(R.drawable.icon);
                        builder.setTitle("请选择你要打开的方式");
                        final String[] items=new String[]{"使用浏览器打开中国天气官网","本应用打开中国天气官网"};
                        builder.setSingleChoiceItems(items, -1, new OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                if(which==0){
                                    Intent intent=new Intent(Intent.ACTION_VIEW);
                                    intent.setData(Uri.parse("http://www.weather.com.cn"));
                                    startActivity(intent);
                                }else {
                                    Intent intent=new Intent(MainPage.this,Weather_web.class);
                                    startActivity(intent);
                                }
                                dialog.dismiss();
                            }
                        });
                        builder.show();
                    }
                });
                break;
                //天气备忘录界面
            case R.id.main_two:
                vpager_four.setCurrentItem(1);
                add_city=findViewById(R.id.add_city);
                add=findViewById(R.id.add);
                list_view=findViewById(R.id.list_view);
                final Intent intent4=getIntent();
                Bundle b1=intent4.getExtras();
                final int[] fla = {1};
                fla[0]=1;
                final String u_name=b1.getString("name");
                final Dao dao=new Dao(MainPage.this);
                final Cursor cursor=dao.queryall(u_name);
                String[] from={"cityname"};
                int[] to={R.id.cityname};
                SimpleCursorAdapter adapter=new SimpleCursorAdapter(MainPage.this,R.layout.display,cursor,from,to);
                list_view.setAdapter(adapter);
                list_view.invalidate();
                add.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        String cn = add_city.getText().toString().trim();
                        if (TextUtils.isEmpty(cn)) {
                            Toast.makeText(MainPage.this, "请输入正确的城市名称！", Toast.LENGTH_SHORT).show();
                        }else {
                            final Cursor cursor2=dao.queryall(u_name);
                            String[] from2={"cityname"};
                            int[] to2={R.id.cityname};
                            SimpleCursorAdapter adapter2=new SimpleCursorAdapter(MainPage.this,R.layout.display,cursor,from2,to2);
                            list_view.setAdapter(adapter2);
                            while(cursor2.moveToNext()){
                                String c_n=cursor2.getString(2);
                                if(add_city.getText().toString().equals(c_n)){
                                    Toast.makeText(MainPage.this, "该城市已经存在！", Toast.LENGTH_SHORT).show();
                                    fla[0] =0;
                                    break;
                                }
                            }
                           if(fla[0]==1){
                               dao.insert(u_name,add_city.getText().toString());
                               final Cursor cursor1=dao.queryall(u_name);
                               String[] from1={"cityname"};
                               int[] to1={R.id.cityname};
                               SimpleCursorAdapter adapter1=new SimpleCursorAdapter(MainPage.this,R.layout.display,cursor1,from1,to1);
                               list_view.setAdapter(adapter1);
                               list_view.invalidate();
                           }
                        }
                        list_view.invalidate();
                    }
                });
                list_view.invalidate();
                list_view.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                    @Override
                    public void onItemClick(AdapterView<?> parent, View view, final int position, final long id) {
                            new Thread() {
                                public void run() {
                                    String city_name = dao.query_cityname(String.valueOf(id));
                                    String path = null;
                                    try {
                                        path = "http://apis.juhe.cn/simpleWeather/query?city="
                                                + city_name + "&key=133be2a97bcc0a48b4bacb57e34a9ec8";
                                        URL url = new URL(path);
                                        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                                        conn.setRequestMethod("GET");
                                        conn.setConnectTimeout(5000);
                                        int code = conn.getResponseCode();
                                        if(code==200) {
                                            InputStream is = conn.getInputStream();
                                            String json = StreamTool.readStream(is);
                                            JSONObject jsonObject = new JSONObject(json);
                                            String reason=jsonObject.getString("reason");
                                            Log.d("reason=",reason);
                                            if("查询成功!".equals(reason)){
                                                JSONObject result = jsonObject.getJSONObject("result");
                                                content[1] = result.getString("city");
                                                JSONObject realtime = result.getJSONObject("realtime");
                                                content[2] = realtime.getString("info") ;
                                                content[3] = realtime.getString("temperature");
                                                content[4] ="空气质量："+ realtime.getString("aqi");
                                                content[5] ="风力："+ realtime.getString("direct") + " 等级：" + realtime.getString("power");
                                                JSONArray array=result.getJSONArray("future");
                                                JSONObject jsonObject1=array.getJSONObject(1);
                                                JSONObject jsonObject2=array.getJSONObject(2);
                                                JSONObject jsonObject3=array.getJSONObject(3);
                                                JSONObject jsonObject4=array.getJSONObject(4);
                                                content[6]="日期："+jsonObject1.getString("date")+"  最低/最高温度："+jsonObject1.getString("temperature")
                                                        +"  天气情况："+jsonObject1.getString("weather")+"  风力:等级："+jsonObject1.getString("direct");
                                                content[7]="日期："+jsonObject2.getString("date")+"  最低/最高温度："+jsonObject2.getString("temperature")
                                                        +"  天气情况："+jsonObject2.getString("weather")+"  风力:等级："+jsonObject2.getString("direct");
                                                content[8]="日期："+jsonObject3.getString("date")+"  最低/最高温度："+jsonObject3.getString("temperature")
                                                        +"  天气情况："+jsonObject3.getString("weather")+"  风力:等级："+jsonObject3.getString("direct");
                                                content[9]="日期："+jsonObject4.getString("date")+"  最低/最高温度："+jsonObject4.getString("temperature")
                                                        +"  天气情况："+jsonObject4.getString("weather")+"  风力:等级："+jsonObject4.getString("direct");
                                                Intent intent3=new Intent(MainPage.this,WeatherNotes.class);
                                                intent3.putExtra("city",content[1]);
                                                intent3.putExtra("info",content[2]);
                                                intent3.putExtra("temperature",content[3]);
                                                intent3.putExtra("aqi",content[4]);
                                                intent3.putExtra("cloudy",content[5]);
                                                intent3.putExtra("f1",content[6]);
                                                intent3.putExtra("f2",content[7]);
                                                intent3.putExtra("f3",content[8]);
                                                intent3.putExtra("f4",content[9]);
                                                startActivity(intent3);
                                            }
                                        }
                                    } catch (Exception e) {
                                        e.printStackTrace();
                                    }
                                }
                            }.start();
                    }
                });
                final AlertDialog.Builder builder=new AlertDialog.Builder(this);
                list_view.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
                    @Override
                    public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
                        final long temp=id;
                        builder.setMessage("是否删除记录？").setPositiveButton("是", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                dao.del((int) temp);
                                Cursor c=dao.queryall(u_name);
                                String[] from={"cityname"};
                                int[] to={R.id.cityname};
                                SimpleCursorAdapter adapter=new SimpleCursorAdapter(MainPage.this,R.layout.display,c,from,to);
                                list_view.setAdapter(adapter);
                                list_view.invalidate();
                            }
                        }).setNegativeButton("否", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {

                            }
                        });
                        AlertDialog ad=builder.create();
                        ad.show();
                        return true;
                    }
                });
                break;
                //发现小功能界面
            case R.id.main_three:
                vpager_four.setCurrentItem(2);
                joke=findViewById(R.id.joke);
                history=findViewById(R.id.history);

                joke.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        Intent intent=new Intent(MainPage.this,TheFunnyDay.class);
                        startActivity(intent);
                    }
                });
                history.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        Intent intent1=new Intent(MainPage.this,TheHistory.class);
                        startActivity(intent1);
                    }
                });
                break;
                //个人信息界面
            case R.id.main_four:
                //初始化个人信息界面
                vpager_four.setCurrentItem(3);
                name=findViewById(R.id.name);
                code=findViewById(R.id.pass);
                zhuxiao=findViewById(R.id.zhuxiao);
                nicheng=findViewById(R.id.nicheng);
                final Intent intent=getIntent();
                Bundle b=intent.getExtras();
                final String username=b.getString("name");
                String password=b.getString("password");
                final String nc=b.getString("nicheng");
                name.setText(username);
                code.setText(password);
                nicheng.setText(nc);
                //跳转到修改信息界面
                code.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    flag=1;
                    Intent intent2=getIntent();
                    Bundle b1=intent2.getExtras();
                    String pass=b1.getString("password");
                    String name=b1.getString("name");
                    b1.putString("ecp",pass);
                    b1.putString("ecn",name);
                    b1.putString("flag", String.valueOf(flag));
                    Intent intent1=new Intent(MainPage.this,ChangeMessage.class);
                    intent1.putExtra("ecp",pass);
                    intent1.putExtra("ecn",name);
                    intent1.putExtra("flag",String.valueOf(flag));
                    startActivity(intent1);
                }
            });
                zhuxiao.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        Intent in=new Intent(MainPage.this,MainActivity.class);
                        startActivity(in);
                    }
                });
                nicheng.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        flag=2;
                        Intent intent3=getIntent();
                        Bundle b2=intent3.getExtras();
                        String NC=b2.getString("nicheng");
                        b2.putString("flag", String.valueOf(flag));
                        b2.putString("ecnc",NC);
                        Intent intent_nc=new Intent(MainPage.this,ChangeMessage.class);
                        intent_nc.putExtra("flag",String.valueOf(flag));
                        intent_nc.putExtra("ecnc",nc);
                        intent_nc.putExtra("ecn", username);
                        startActivityForResult(intent_nc,1);
                    }
                });
                break;

        }
    }

    public void getData(final String city_name){
    new Thread() {
        public void run() {
            String path = null;
            try {
                path = "http://apis.juhe.cn/simpleWeather/query?city="
                        + city_name + "&key=133be2a97bcc0a48b4bacb57e34a9ec8";
                URL url = new URL(path);
                HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                conn.setRequestMethod("GET");
                conn.setConnectTimeout(5000);
                int code = conn.getResponseCode();
                if(code==200) {
                    InputStream is = conn.getInputStream();
                    String json = StreamTool.readStream(is);
                    JSONObject jsonObject = new JSONObject(json);
                    String reason=jsonObject.getString("reason");
                    if("查询成功!".equals(reason)){
                        Message message=new Message();
                        message.obj=jsonObject;
                        handler.sendMessage(message);
                    }
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }.start();
}
    @Override
    public void onActivityResult(int requestCode,int resultCode,Intent data) {
        nicheng.setText(data.getStringExtra("data_return"));
        super.onActivityResult(requestCode, resultCode, data);
    }
    @Override
    public void onPageSelected(int index) {
        Animation animation = null;
        switch (index) {
            case 0:
                if (currIndex == 1) {
                    animation = new TranslateAnimation(one, 0, 0, 0);
                } else if (currIndex == 2) {
                    animation = new TranslateAnimation(two, 0, 0, 0);
                }else if (currIndex == 3) {
                    animation = new TranslateAnimation(three, 0, 0, 0);
                }
                break;
            case 1:
                if (currIndex == 0) {
                    animation = new TranslateAnimation(offset, one, 0, 0);
                } else if (currIndex == 2) {
                    animation = new TranslateAnimation(two, one, 0, 0);
                }else if (currIndex == 3) {
                    animation = new TranslateAnimation(three, one, 0, 0);
                }
                break;
            case 2:
                if (currIndex == 0) {
                    animation = new TranslateAnimation(offset, two, 0, 0);
                } else if (currIndex == 1) {
                    animation = new TranslateAnimation(one, two, 0, 0);
                }else if (currIndex == 3) {
                    animation = new TranslateAnimation(three, two, 0, 0);
                }
                break;
            case 3:
                if (currIndex == 1) {
                    animation = new TranslateAnimation(offset, three, 0, 0);
                } else if (currIndex == 2) {
                    animation = new TranslateAnimation(one, three, 0, 0);
                }else if (currIndex == 0) {
                    animation = new TranslateAnimation(offset, three, 0, 0);
                }
                break;
        }
        currIndex = index;
        animation.setFillAfter(true);// true表示图片停在动画结束位置
        animation.setDuration(300); //设置动画时间为300毫秒
        img_cursor.startAnimation(animation);//开始动画
    }
    @Override
    public void onPageScrollStateChanged(int i) {

    }
    //position 当前所在页面   i
    //positionOffset 当前所在页面偏移百分比    v
    //positionOffsetPixels 当前所在页面偏移量    i1
    @Override
    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
//        View view=new View(MainPage.this);
//        switch (position){
//            case 0:
//                onClick(view.findViewById(R.id.main_one));
//                break;
//            case 1:
//                onClick(view.findViewById(R.id.main_two));
//                break;
//            case 2:
//                onClick(view.findViewById(R.id.main_three));
//                break;
//            case 3:
//                onClick(view.findViewById(R.id.main_four));
//                break;
//        }

    }


    @Override
    public void onPointerCaptureChanged(boolean hasCapture) {

    }


}

传送门：app实现后详细情况