搜索网络影视图片数据，展示为无限轮播图+ImageLoader

来源：互联网发布：多益网络笔试编辑：程序博客网时间：2024/04/28 05:14

一. MainActivity.java

package activity.Movies;import android.os.AsyncTask;import android.os.Handler;import android.os.Message;import android.support.v4.view.ViewPager;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.text.TextUtils;import android.util.Log;import android.view.View;import android.widget.EditText;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.TextView;import android.widget.Toast;import com.google.gson.Gson;import com.nostra13.universalimageloader.core.ImageLoader;import org.apache.http.HttpResponse;import org.apache.http.client.HttpClient;import org.apache.http.client.methods.HttpGet;import org.apache.http.impl.client.DefaultHttpClient;import java.io.BufferedReader;import java.io.InputStream;import java.io.InputStreamReader;import java.net.URLEncoder;import java.util.ArrayList;import java.util.List;import Adapter.MyPagerAdapter;import Bean.MovieBean;public class MainActivity extends AppCompatActivity {    private TextView area;    private TextView title;    private EditText edit_name;    private ViewPager viewPager;    private LinearLayout linelayout;    private ImageView image_cover;    private List<ImageView> images;    private MyPagerAdapter pagerAdapter;    private List<MovieBean.ResultBean.ActSBean> list=new ArrayList<>();        private Handler handler = new Handler(){        @Override        public void handleMessage(Message msg) {            if (msg.what == 0){                int currentItem = viewPager.getCurrentItem();                viewPager.setCurrentItem(currentItem+1);                //持续发送空消息                handler.sendEmptyMessageDelayed(0,2888);            }        }    };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        title = (TextView) findViewById(R.id.title);        area = (TextView) findViewById(R.id.area);        edit_name = (EditText) findViewById(R.id.edit_name);        viewPager = (ViewPager) findViewById(R.id.viewPager);        linelayout = (LinearLayout) findViewById(R.id.linear_layout);        image_cover = (ImageView) findViewById(R.id.image_cover);        //轮播图延时发送空消息，展示在某一页面        viewPager.setCurrentItem(list.size()%100000);        handler.sendEmptyMessageDelayed(0,2888);    }    //点击搜索影片的方法    public void find(View view){        //先清空集合，再执行异步任务        list.clear();        MyTask task = new MyTask();        String movies = edit_name.getText().toString();        String encode = URLEncoder.encode(movies);        if (!TextUtils.isEmpty(encode)){            task.execute("http://op.juhe.cn/onebox/movie/video?key=2189382719d77ad949572c948ad39072&q="+edit_name.getText().toString());        }else{            Toast.makeText(MainActivity.this,"请输入完整的影片名称！",Toast.LENGTH_SHORT).show();        }    }    //异步任务加载数据    class MyTask extends AsyncTask<String,String,String> {        @Override        protected String doInBackground(String... strings) {            try {                //客户端                HttpClient client = new DefaultHttpClient();                //get请求方式                HttpGet httpGet = new HttpGet(strings[0]);                //响应对象                HttpResponse response = client.execute(httpGet);                int statusCode = response.getStatusLine().getStatusCode();                if (statusCode==200){                    InputStream inputStream = response.getEntity().getContent();                    String json = streamToString(inputStream,"utf-8");                    return json;                }            } catch (Exception e) {                e.printStackTrace();            }            return null;        }        @Override        protected void onPostExecute(String result) {            MovieBean movieBean = new Gson().fromJson(result, MovieBean.class);            //调用设置适配器的方法，设置展示数据            if (movieBean != null){                list.addAll(movieBean.getResult().getAct_s());                Log.i("集合", MainActivity.this.list.toString());                //初始化小圆点的方法                initCircle();                setAdapter();            }            //把查询到的影片信息赋值            ImageLoader.getInstance().displayImage(movieBean.getResult().getCover(),image_cover);            title.setText("片名："+movieBean.getResult().getTitle());            area.setText("区域："+movieBean.getResult().getArea());        }    }    private void initCircle() {        //首先需要一个集合记录这些小圆点的图片,,,,当页面切换的时候,可以从集合中取出imageView进行显示图片的设置        images = new ArrayList<>();        //先清空移除所有的view        linelayout.removeAllViews();        //集合数据对应的圆点        for (int i = 0;i<list.size();i++){            ImageView imageView = new ImageView(MainActivity.this);            //刚开始显示时的顔色            if (i == 0){                imageView.setImageResource(R.drawable.button_selected);            }else {                imageView.setImageResource(R.drawable.button_select_no);            }            //把设置好的视图添加到集合中            images.add(imageView);            //加入到线性布局中显示            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);            //圆点之间的间距            params.setMargins(8,0,8,0);            linelayout.addView(imageView,params);        }    }    //设置适配器的方法    public void setAdapter() {        //设置无限轮播图的适配器        if (pagerAdapter == null){            pagerAdapter = new MyPagerAdapter(MainActivity.this,list);            viewPager.setAdapter(pagerAdapter);            //viewPager页面改变的监听事件            viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {                @Override                public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {                }                @Override                public void onPageSelected(int position) {                    //如果选中了这一页,,,当前小圆点红色,,,否则绿色                    for (int i = 0;i<images.size();i++){                        if (i == position%images.size()){                            images.get(i).setImageResource(R.drawable.button_selected);                        }else {                            images.get(i).setImageResource(R.drawable.button_select_no);                        }                    }                }                @Override                public void onPageScrollStateChanged(int state) {                }            });        }else{            pagerAdapter.notifyDataSetChanged();        }    }    //Json数据解析的自定义方法    private String streamToString(InputStream inputStream, String encode) {        try {            //转换流            InputStreamReader streamReader = new InputStreamReader(inputStream, encode);            //缓冲流            BufferedReader reader = new BufferedReader(streamReader);            //缓冲区            StringBuilder builder = new StringBuilder();            //读取数据            String data = null;            while ((data = reader.readLine())!=null){                builder.append(data);            }            //关流，返回数据            reader.close();            return  builder.toString();        } catch (Exception e) {            e.printStackTrace();        }        return null;    }}

二. 自定义适配器类

package Adapter;import android.content.Context;import android.support.v4.view.PagerAdapter;import android.view.View;import android.view.ViewGroup;import android.widget.ImageView;import com.nostra13.universalimageloader.core.ImageLoader;import java.util.List;import Bean.MovieBean;public class MyPagerAdapter extends PagerAdapter{    //声明变量    private Context context;    private  List<MovieBean.ResultBean.ActSBean> list;    public MyPagerAdapter(Context context, List<MovieBean.ResultBean.ActSBean> list) {        this.context = context;        this.list = list;    }    @Override    public int getCount() {        return Integer.MAX_VALUE;    }    @Override    public boolean isViewFromObject(View view, Object object) {        return view == object;    }    @Override    public Object instantiateItem(ViewGroup container, int position) {        ImageView imageView = new ImageView(context);        imageView.setScaleType(ImageView.ScaleType.FIT_XY);        ImageLoader.getInstance().displayImage(list.get(position%list.size()).getImage(),imageView);        container.addView(imageView);        return imageView;    }    @Override    public void destroyItem(ViewGroup container, int position, Object object) {        container.removeView((View) object);    }}

三. ImageLoader类的辅助工具类

package Util;import android.app.Application;import android.content.Context;import com.nostra13.universalimageloader.cache.disc.impl.UnlimitedDiscCache;import com.nostra13.universalimageloader.cache.disc.naming.HashCodeFileNameGenerator;import com.nostra13.universalimageloader.cache.memory.impl.LruMemoryCache;import com.nostra13.universalimageloader.core.DisplayImageOptions;import com.nostra13.universalimageloader.core.ImageLoader;import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;import com.nostra13.universalimageloader.core.assist.QueueProcessingType;import com.nostra13.universalimageloader.core.download.BaseImageDownloader;import com.nostra13.universalimageloader.utils.StorageUtils;import java.io.File;public class ImageUtil extends Application{    @Override    public void onCreate() {        super.onCreate();        inconfig(this);    }        //配置ImageLoader类    public void inconfig(Context context){        File cacheDir = StorageUtils.getCacheDirectory(context);        ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(context)                .memoryCacheExtraOptions(480, 800) // default = device screen dimensions                .threadPriority(Thread.NORM_PRIORITY - 1) // default                .tasksProcessingOrder(QueueProcessingType.FIFO) // default                .denyCacheImageMultipleSizesInMemory()                .memoryCache(new LruMemoryCache(2 * 1024 * 1024))                .memoryCacheSize(2 * 1024 * 1024)                .memoryCacheSizePercentage(13) // default                .diskCache(new UnlimitedDiscCache(cacheDir)) // default                .diskCacheSize(50 * 1024 * 1024)                .diskCacheFileCount(100)                .diskCacheFileNameGenerator(new HashCodeFileNameGenerator()) // default                .imageDownloader(new BaseImageDownloader(context)) // default                .defaultDisplayImageOptions(DisplayImageOptions.createSimple()) // default                .writeDebugLogs()                .build();        ImageLoader.getInstance().init(config);    }}

四. 自定义请求网络数据的Bean封装类

五. 布局xml文件：

1. activity_main.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="activity.Movies.MainActivity">    <LinearLayout        android:id="@+id/line"        android:orientation="horizontal"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_alignParentTop="true">        <EditText            android:singleLine="true"            android:inputType="text"            android:hint="请输入电影名称"            android:id="@+id/edit_name"            android:layout_width="288dp"            android:layout_marginLeft="30dp"            android:layout_height="wrap_content" />        <Button            android:text="搜索"            android:onClick="find"            android:layout_width="80dp"            android:layout_height="40dp"            android:layout_marginLeft="45dp"/>    </LinearLayout>    <RelativeLayout        android:id="@+id/relative"        android:layout_height="288dp"        android:layout_marginTop="3dp"        android:layout_below="@+id/line"        android:layout_width="match_parent">        <android.support.v4.view.ViewPager            android:id="@+id/viewPager"            android:layout_width="match_parent"            android:layout_height="match_parent"/>        <LinearLayout            android:layout_alignBottom="@+id/viewPager"            android:layout_centerHorizontal="true"            android:layout_marginBottom="18dp"            android:orientation="horizontal"            android:id="@+id/linear_layout"            android:layout_width="100dp"            android:layout_height="28dp"  >        </LinearLayout>    </RelativeLayout>    <ImageView        android:layout_width="500dp"        android:layout_height="318dp"        android:id="@+id/image_cover"        android:layout_marginTop="50dp"        android:layout_below="@+id/relative"        android:layout_centerHorizontal="true"/>    <LinearLayout        android:orientation="horizontal"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_marginBottom="30dp"        android:layout_centerHorizontal="true"        android:layout_alignParentBottom="true"  >        <TextView            android:id="@+id/title"            android:textSize="18sp"            android:layout_marginLeft="106dp"            android:layout_width="wrap_content"            android:layout_height="wrap_content" />        <TextView            android:id="@+id/area"            android:textSize="18sp"            android:layout_marginLeft="36dp"            android:layout_width="wrap_content"            android:layout_height="wrap_content" />    </LinearLayout></RelativeLayout>

2. drawable文件夹下轮播图中小圆点的实现代码

(1). button_selected.xml

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android">    <solid android:color="#00FF7F"></solid>    <corners android:radius="6dp"></corners>    <size android:width="8dp" android:height="8dp"></size></shape>

(2). button_select_no.xml

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android">    <solid android:color="#FFA07A"></solid>    <corners android:radius="6dp"></corners>    <size android:width="8dp" android:height="8dp"></size></shape>

最后在AndroidManifest.xml中声明网络请求权限和ImageLoader的name属性。

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