Android菜鳥練習第三十六課 創建JSON串

public class MainActivity extends AppCompatActivity {
    public JSONObject obj;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        obj = new JSONObject();
        try {
            obj.put("key", "value111");
            JSONArray arr = new JSONArray();
            for (int i = 0; i < 3; i++) {
                JSONObject object = new JSONObject();
                object.put("arr-key" + i, "arr-value" + i);
                object.put("arr-secondkey"+i,"arr-secondvalue"+i);
                arr.put(object);
            }
            obj.put("arr", arr);
            JSONObject obj2 = new JSONObject();
            obj2.put("obj2-key1","obj2-value1");
            obj2.put("obj2-key2","obj2-value2");
            obj2.put("obj2-key3","obj2-value3");
            obj.put("obj2",obj2);
            Log.e("JSON",obj.toString());
        } catch (JSONException e) {
            e.printStackTrace();
        }

    }
}

創建結果如下

{
    "key": "value111",
    "arr": [
        {
            "arr-key0": "arr-value0",
            "arr-secondkey0": "arr-secondvalue0"
        },
        {
            "arr-key1": "arr-value1",
            "arr-secondkey1": "arr-secondvalue1"
        },
        {
            "arr-key2": "arr-value2",
            "arr-secondkey2": "arr-secondvalue2"
        }
    ],
    "obj2": {
        "obj2-key1": "obj2-value1",
        "obj2-key2": "obj2-value2",
        "obj2-key3": "obj2-value3"
    }
}