public class MainActivity extends Activity {
// 全域性
NewsData newsData;
private Button btn1, btn2;
private ListView list;
private MyAdapter adapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    // 獲取事件源
    btn1 = (Button) findViewById(R.id.btn1);
    btn2 = (Button) findViewById(R.id.btn2);
    list = (ListView) findViewById(R.id.list);
    // 介面卡
    adapter = new MyAdapter();
    list.setAdapter(adapter);
    // 點選事件
    btn1.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View arg0) {
            Toast.makeText(MainActivity.this, "這是HttpClient", 0).show();
            adapter.notifyDataSetChanged();
            init();
        }
    });
    // 點選事件
    btn2.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View arg0) {
            Toast.makeText(MainActivity.this, "這是HttpURLConnection", 0)
                    .show();
            adapter.notifyDataSetChanged();
            init();
        }
    });
}
/**
 * 
 */
protected void init() {
    // 非同步處理
    new AsyncTask<String, String, String>() {

        @Override
        protected String doInBackground(String... arg0) {
            // 獲取資料
            String result = initdata();
            return result;
        }

        @Override
        protected void onPostExecute(String result) {
            // TODO Auto-generated method stub
            // 解析json串
            Gson gson = new Gson();
            newsData = gson.fromJson(result, NewsData.class);
            // 重新整理介面卡
            adapter.notifyDataSetChanged();
            super.onPostExecute(result);
        }
    }.execute("");
}

protected String initdata() {
    String result = "";
    try {
        // url
        URL url = new URL(
                "https://api.tianapi.com/wxnew/?key=8d6e3228d25298f13af4fc40ce6c9679&num=10");
        HttpURLConnection connection = (HttpURLConnection) url
                .openConnection();
        connection.setRequestMethod("GET");
        // code
        int code = connection.getResponseCode();
        // 判斷
        if (code == 200) {
            // 獲取資料
            InputStream is = connection.getInputStream();
            ByteArrayOutputStream stream = new ByteArrayOutputStream();
            int len = 0;
            byte[] b = new byte[1024];
            while ((len = is.read(b)) != -1) {
                stream.write(b, 0, len);
            }
            result = new String(stream.toByteArray());
            return result;
        }
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return "";
}

// 介面卡
class MyAdapter extends BaseAdapter {

    @Override
    public int getCount() {
        // TODO Auto-generated method stub
        if (newsData != null) {
            return newsData.getNewslist().size();
        }
        return 0;
    }

    @Override
    public Object getItem(int arg0) {
        // TODO Auto-generated method stub
        return newsData.getNewslist().get(arg0);
    }

    @Override
    public long getItemId(int arg0) {
        // TODO Auto-generated method stub
        return arg0;
    }

    @Override
    public View getView(final int arg0, View arg1, ViewGroup arg2) {
        // TODO Auto-generated method
        // 例項化
        final AAA aaa;
        if (arg1 == null) {
            aaa = new AAA();
            // 獲取佈局
            arg1 = LayoutInflater.from(MainActivity.this).inflate(
                    R.layout.list, null);
            aaa.ima = (ImageView) arg1.findViewById(R.id.ima);
            aaa.text1 = (TextView) arg1.findViewById(R.id.text1);
            aaa.text2 = (TextView) arg1.findViewById(R.id.text2);
            arg1.setTag(aaa);
        } else {
            aaa = (AAA) arg1.getTag();
        }
        // 更改資料
        aaa.text1.setText(newsData.getNewslist().get(arg0).getTitle());
        aaa.text2.setText(newsData.getNewslist().get(arg0).getCtime());
        new Thread() {
            public void run() {
                final Bitmap bitmap = getima(newsData.getNewslist()
                        .get(arg0).getPicUrl());
                runOnUiThread(new Runnable() {
                    public void run() {
                        aaa.ima.setImageBitmap(bitmap);
                    }
                });
            };
        }.start();
        return arg1;
    }

    // aaa類
    class AAA {
        TextView text1, text2;
        ImageView ima;
    }
}

// 獲取圖片方法
public Bitmap getima(String path) {
    try {
        URL url = new URL(path);
        HttpURLConnection connection = (HttpURLConnection) url
                .openConnection();
        int code = connection.getResponseCode();
        if (code == 200) {
            InputStream is = connection.getInputStream();
            Bitmap bitmap = BitmapFactory.decodeStream(is);
            return bitmap;
        }
    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    return null;
}
 

}

NewsData類
public class NewsData {
// 定義私有屬性
private String code;
private String msg;
private List newslist;

News類
public class News {
// 定義私有屬性
private String ctime;
private String description;
private String picUrl;
private String title;
private String url;