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Android程序解析json数据可以通过gson的方式，这种情况需要导入相应的jar包。测试代码如下：
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment()).commit();
}
//第一种方式：
String jsonString = "{\"id\":\"1378230362\",\"name\":\"360U1378230362\"}";
System.out.println(jsonString);
jsonString = "[" + jsonString + "]";
try {
JsonReader reader = new JsonReader(new StringReader(jsonString));
reader.beginArray();
while (reader.hasNext()) {
reader.beginObject();
while (reader.hasNext()) {
String tagName = reader.nextName();
if (tagName.equals("id")) {
Toast.makeText(this, "id:" + reader.nextString(), 1000).show();
System.out.println(reader.nextString());
} else if (tagName.equals("name")) {
Toast.makeText(this, "name:" + reader.nextString(), 1000).show();
//System.out.println(reader.nextString());
}
}
reader.endObject();
}
reader.endArray();
} catch (Exception e) {
e.printStackTrace();
}
}
2 通过Android中的JSONObject的方式解析JSON数据
package com.example.jsontest2;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.Toast;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String jsonMessage = "{\"语文\":\"88\",\"数学\":\"78\",\"计算机\":\"99\"}";
String value1 = null;
try {
// 将字符串转换成jsonObject对象
JSONObject myJsonObject = new JSONObject(jsonMessage);
// 获取对应的值
value1 = myJsonObject.getString("数学");
Toast.makeText(this, "value1:" + value1, 3000).show();
} catch (JSONException e) {}
System.out.println("value1=" + value1);
// JSONArray
jsonMessage = "[{'num':'成绩', '外语':88, '历史':65, '地理':99, 'object':{'aaa':'1111','bbb':'2222','cccc':'3333'}},"
+ "{'num':'兴趣', '外语':28, '历史':45, '地理':19, 'object':{'aaa':'11a11','bbb':'2222','cccc':'3333'}},"
+ "{'num':'爱好', '外语':48, '历史':62, '地理':39, 'object':{'aaa':'11c11','bbb':'2222','cccc':'3333'}}]";
JSONArray myJsonArray;
try {
myJsonArray = new JSONArray(jsonMessage);
for (int i = 0; i < myJsonArray.length(); i++) {
// 获取每一个JsonObject对象
JSONObject myjObject = myJsonArray.getJSONObject(i);
// 获取每一个对象中的值
String numString = myjObject.getString("num");
int englishScore = myjObject.getInt("外语");
int historyScore = myjObject.getInt("历史");
int geographyScore = myjObject.getInt("地理");
// 获取数组中对象的对象
JSONObject myjObject2 = myjObject.getJSONObject("object");
String aaaString = myjObject2.getString("aaa");
System.out.println("aaaString=" + aaaString);
System.out.println("numString=" + numString);
System.out.println("englishScore=" + englishScore);
System.out.println("historyScore=" + historyScore);
System.out.println("geographyScore=" + geographyScore);
}
} catch (JSONException e) {
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
