Android中Json数据读取与创建的方法

 package activity.cyq.datalrearn;
 import android.support.v.app.AppCompatActivity;
 import android.os.Bundle;
 import android.view.View;
 import android.widget.TextView;
 import org.json.JSONArray;
 import org.json.JSONException;
 import org.json.JSONObject;
 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 public class JsonLearn extends AppCompatActivity {
   private TextView writeText, readText;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     setContentView(R.layout.activity_json_learn);
     readText = (TextView) findViewById(R.id.readJsonText);
     writeText = (TextView) findViewById(R.id.writeJsonText);
     /*读取Json数据*/
     findViewById(R.id.readJsioBtn).setOnClickListener(new View.OnClickListener() {
       @Override
       public void onClick(View v) {
         /*获取到assets文件下的TExt.json文件的数据，并以输出流形式返回。*/
         InputStream is = JsonLearn.this.getClass().getClassLoader().getResourceAsStream("assets/" + "Text.json");
         InputStreamReader streamReader = new InputStreamReader(is);
         BufferedReader reader = new BufferedReader(streamReader);
         String line;
         StringBuilder stringBuilder = new StringBuilder();
         try {
           while ((line = reader.readLine()) != null) {
             // stringBuilder.append(line);
             stringBuilder.append(line);
           }
           reader.close();
           reader.close();
           is.close();
         } catch (IOException e) {
           e.printStackTrace();
         }
         try {
           JSONObject person = new JSONObject(stringBuilder.toString());
           JSONArray infArray = person.getJSONArray("inf");
           for (int i = ; i < infArray.length(); i++) {
             JSONObject inf_Array = infArray.getJSONObject(i);
             readText.append("name:" + inf_Array.getString("name") + "\n");
             readText.append("IdCard:" + inf_Array.getString("IdCard"));
             readText.append("age:" + inf_Array.getInt("age"));
             readText.append("married:" + inf_Array.getBoolean("married"));
           }
         } catch (JSONException e) {
           e.printStackTrace();
         }
       }
     });
     /*创建Json数据并显示*/
     findViewById(R.id.writeJsioBtn).setOnClickListener(new View.OnClickListener() {
       @Override
       public void onClick(View v) {
         try {
           JSONObject inf = new JSONObject();
           inf.put("number", );
           JSONArray array = new JSONArray();
           JSONObject arr_ = new JSONObject();
           arr_.put("name", "张三");
           arr_.put("age", );
           arr_.put("IdCard", "XC");
           arr_.put("married", true);
           JSONObject arr_ = new JSONObject();
           arr_.put("name", "李四");
           arr_.put("age", );
           arr_.put("IdCard", "@DC");
           arr_.put("married", true);
           array.put(, arr_);
           array.put(, arr_);
           inf.put("inf", array);
           writeText.setText(inf.toString());
         } catch (JSONException e) {
           e.printStackTrace();
         }
       }
     });
   }
 }