安卓解析json

重点是开启网络权限

难点是调用函数

开启网络权限

    </application>
<uses-permission android:name="android.permission.INTERNET">
</uses-permission>
</manifest>

读json的函数

public static String get(String urlString)  {

        /*try{
            HttpGet request = new HttpGet(urlString);
            String result=getHttpClient().execute(request,new BasicResponseHandler());
            return result;
        }catch(IOException e){
            throw e;
        }*/

        String result="";
        BufferedReader in=null;
        try {
            HttpClient client = new DefaultHttpClient();
            HttpGet request=new HttpGet(urlString);
            HttpResponse response = client.execute(request);

            in=new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
            StringBuffer sb=new StringBuffer("");
            String line="";
            String NL=System.getProperty("line.separator");
           // String NL="";
            while((line=in.readLine())!=null){
                sb.append(line+NL);
            }
            in.close();
            result=sb.toString();
            result=JsonFilter(result);
        }
        catch (Exception e) {
            e.printStackTrace();
        }
        finally{
            if(in!=null){
                try{
                    in.close();
                }catch(IOException e){
                    e.printStackTrace();
                }
            }
        }
        return result;
    }

    /*
     * 对json字符串进行过滤,防止乱码和黑框
     */
    public static String JsonFilter(String jsonstr){
        return jsonstr.substring(jsonstr.indexOf("{")).replace("\r\n","\n");
    }

调用函数

/*****************************************************主要是点击事件*********************************************/
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

          final Button button1 = (Button) findViewById(R.id.button1);//final获得句柄 获得句柄
          final   TextView textView =  (TextView) findViewById(R.id.textView1);

          button1.setOnClickListener(new OnClickListener()
          {
             public void onClick(View v)
             {

                 textView.setText(get("http://www.weather.com.cn/data/cityinfo/101010100.html"));

                     }

          });

    }