AsyncTask

来源：互联网发布：muse软件怎么玩编辑：程序博客网时间：2024/06/09 16:43

package net.bwie.network.activity;import android.os.AsyncTask;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.ImageView;import com.google.gson.Gson;import com.squareup.picasso.Picasso;import net.bwie.network.R;import net.bwie.network.bean.KaiYan;import java.io.BufferedReader;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL;import java.util.List;/** * 下一页post请求 * 使用异步任务下载网络数据 * 使用gson解析 * 注：有时间看看我讲的原生json解析 */public class MainActivity extends AppCompatActivity implements View.OnClickListener {    public static final String KAI_YAN_URL = "http://baobab.kaiyanapp.com/api/v4/tabs/selected?udid=11111&vc=168&vn=3.3.1&deviceModel=Huawei%36&first_channel=eyepetizer_baidu_market&last_channel=eyepetizer_baidu_market&system_version_code=20";    protected Button mGetNetworkDataBtn;    protected Button mGetPicBtn;    protected ImageView mImageView;    protected Button mNextBtn;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        super.setContentView(R.layout.activity_main);        initView();    }    @Override    public void onClick(View view) {        if (view.getId() == R.id.get_network_data_btn) {            getDatas();        } else if (view.getId() == R.id.get_pic_btn) {            getPicture();        } else if (view.getId() == R.id.next_btn) {            PostActivity.startActivity(this);        }    }    private void getDatas() {        MyTask task = new MyTask();        task.execute(KAI_YAN_URL);    }    private void getPicture() {        String imgUrl = "http://img.kaiyanapp.com/1699f3946ccd281230a1d887d169439f.png?imageMogr2/quality/60/format/jpg";        Picasso                .with(this)                .load(imgUrl)                .into(mImageView);    }    private void initView() {        mGetNetworkDataBtn = (Button) findViewById(R.id.get_network_data_btn);        mGetNetworkDataBtn.setOnClickListener(MainActivity.this);        mGetPicBtn = (Button) findViewById(R.id.get_pic_btn);        mGetPicBtn.setOnClickListener(MainActivity.this);        mImageView = (ImageView) findViewById(R.id.image_view);        mNextBtn = (Button) findViewById(R.id.next_btn);        mNextBtn.setOnClickListener(MainActivity.this);    }    private class MyTask extends AsyncTask<String, Void, List<KaiYan.ItemBean>> {        @Override        protected List<KaiYan.ItemBean> doInBackground(String... params) {            String requestUrl = params[0];            // 使用HTTPUrlConnection            try {                URL url = new URL(requestUrl);                HttpURLConnection connection = (HttpURLConnection) url.openConnection();                // 配置connection                connection.setRequestMethod("GET");// GET或POST必须大写                // 连接网络                connection.connect();                // 判断是否连接成功                if (connection.getResponseCode() == 200) {                    // 获取来自网络的输入流                    // 使用缓冲字符输入流                    // 字节流转字符流                    BufferedReader br = null;                    br = new BufferedReader(new InputStreamReader(connection.getInputStream()));                    // 最终接收的json字符串                    String json = "";                    // 使用缓冲流读取到的每一行数据                    String line = "";                    while ((line = br.readLine()) != null) {                        json += line.trim();                    }                    // json数据产生完毕，该解析了                    Gson gson = new Gson();                    KaiYan kaiYan = gson.fromJson(json, KaiYan.class);                    List<KaiYan.ItemBean> itemList = kaiYan.getItemList();                    return itemList;                }            } catch (Exception e) {                e.printStackTrace();                Log.d("1507", e.getMessage());            }            return null;        }        @Override        protected void onPostExecute(List<KaiYan.ItemBean> itemList) {            super.onPostExecute(itemList);            // 可以使用RecyclerView或ListView展示数据            for (KaiYan.ItemBean itemBean : itemList) {                Log.d("1507", "type: " + itemBean.getType() +                        ", title: " + itemBean.getData().getTitle() +                        ", url" + itemBean.getData().getPlayUrl());            }        }    }}

bean

package net.bwie.network.bean;import java.util.List;public class KaiYan {    private List<ItemBean> itemList;    public List<ItemBean> getItemList() {        return itemList;    }    public void setItemList(List<ItemBean> itemList) {        this.itemList = itemList;    }    public static class ItemBean {        private String type = "";        private DataBean data;        public String getType() {            return type;        }        public void setType(String type) {            this.type = type;        }        public DataBean getData() {            return data;        }        public void setData(DataBean data) {            this.data = data;        }        public static class DataBean {            private String playUrl = "";            private String title = "";            public String getPlayUrl() {                return playUrl;            }            public void setPlayUrl(String playUrl) {                this.playUrl = playUrl;            }            public String getTitle() {                return title;            }            public void setTitle(String title) {                this.title = title;            }        }    }}

对应布局

<?xml version="1.0" encoding="utf-8"?><LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context="net.bwie.network.activity.MainActivity">    <Button        android:id="@+id/next_btn"        android:text="下一页POST请求"        android:layout_width="wrap_content"        android:layout_height="wrap_content"/>    <Button        android:id="@+id/get_network_data_btn"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="下载网络数据"/>    <Button        android:id="@+id/get_pic_btn"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="获取网络图片"/>    <ImageView        android:id="@+id/image_view"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:src="@mipmap/ic_launcher"/></LinearLayout>

阅读全文

0 0