Adroid解析json

参考资料：

http://www.open-open.com/lib/view/open1326376799874.html

http://www.cnblogs.com/tt_mc/archive/2011/01/04/1925327.html

总结:

解析普通json：使用JSONObject，getString方法；

解析数组形式json：使用JSONArray，getJSONArray方法后，遍历数组，使用普通json的解析方法；

public class GetPostMain extends Activity
{
    Button get , post;
    EditText show;
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        get = (Button) findViewById(R.id.get);
        post = (Button) findViewById(R.id.post);
        show = (EditText)findViewById(R.id.show);
        get.setOnClickListener(new OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                String response = GetPostUtil
                    .sendGet("http://www.weather.com.cn/data/sk/101281601.html" , null);
                show.setText(response);

            }
        });
        post.setOnClickListener(new OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                String data = "";
                try{
                    // 构造json
                    JSONObject param = new JSONObject();  
                    param.put("userid", "uid45798");  
                    param.put("lat", "32.038587000000");
                    param.put("lon", "118.778906000000"); 
                    data = param.toString();  
                }catch(JSONException e){
                    Log.e("postdata", "Json post error");
                }
                String response = GetPostUtil.sendPost("http://xxxx.getNearbyActivity", data);
                Log.d("postdata",data);

                String str1 = "";
                String str2 = "";
                try{
                    // 获取单个key值
                    JSONObject jsonObj = new JSONObject(response.toString());
                    String errorcode = "errorcode:" + jsonObj.getString("errorcode");
                    String count = "count:" + jsonObj.getString("count");
                    String userid = "userid:" + jsonObj.getString("userid");
                    str1 = errorcode+"\n"+userid+"\n"+count+"\n";
                }catch(JSONException e){
                    System.out.println("Json parse error");
                    str1 = "str1没有数据\n";
                }

                try{
                    // 获取多组json
                    JSONArray jsonObjs = new JSONObject(response.toString()).getJSONArray("datalist");
                    for(int i = 0; i < jsonObjs.length() ; i++){
                        JSONObject jsonObj = (JSONObject)jsonObjs.opt(i);
                        String brand = "brand:"+ jsonObj.getString("brand");
                        String aid = "aid:"+ jsonObj.getString("aid");
                        str2 += aid+","+brand+"\n";
                    }
                }catch(JSONException e){
                    System.out.println("Json parse error");
                    str2 = "str2没有数据";
                }
                show.setText(str1+str2);
            }
        });
    }
}