wenti

<?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:id="@+id/activity_main"    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"    tools:context="com.example.administrator.money104.MainActivity">

    <ListView        android:id="@+id/lv_main"        android:layout_width="match_parent"        android:layout_height="match_parent"        /></RelativeLayout>

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="horizontal"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:padding="4dp"    android:id="@+id/lv_main">    <ImageView        android:id="@+id/iv_icon"        android:layout_width="64dp"        android:layout_height="64dp"        android:src="@mipmap/ic_launcher"        />    <LinearLayout        android:layout_width="match_parent"        android:layout_height="match_parent"        android:paddingLeft="4dp"        android:orientation="vertical"        android:gravity="center"        >        <TextView            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:textSize="15sp"            android:maxLines="1"            android:text="Title"            />

        <TextView            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:textSize="10sp"            android:maxLines="3"            android:text="content"            android:id="@+id/textView" />    </LinearLayout></LinearLayout>

package com.example.administrator.money104;

import android.os.AsyncTask;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.widget.ListView;

import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.UnsupportedEncodingException;import java.net.URL;import java.util.ArrayList;import java.util.List;

public class MainActivity extends AppCompatActivity {    public ListView mListView;    public static final String URL = "http://www.imooc.com/api/teacher?type=4&num=30";    String jsonString = null;    String line ="";    BufferedReader br;    InputStreamReader isr;    String result = "";    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mListView = (ListView) findViewById(R.id.lv_main);        new NewAsyncTask().execute(URL);    }    class NewAsyncTask extends AsyncTask<String,Void,List<NewBean>>{

        @Override        protected List<NewBean> doInBackground(String... params) {            return getJsonDate(params[0]);//请求网址        }    }

    private List<NewBean> getJsonDate(String url) {        List<NewBean> newListNewBean = new ArrayList<>();

        try {            jsonString = readStream(new URL(url).openStream());//URL  为 net的URL**********        } catch (IOException e) {            e.printStackTrace();        }        Log.d("lld",jsonString);        return newListNewBean;    }    private String readStream(InputStream is)    {

        try {

            isr = new InputStreamReader(is,"utf-8");//字节流转化为字符流             br = new BufferedReader(isr);            while ((line = br.readLine())!= null){                result += result;            }        } catch (UnsupportedEncodingException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }        return result;    }}