Android使用OKHTTP解析JSON數據

知識 07-03

為了代碼重用，我們首先封裝一個類。這個類是HttpUtil

HttpUtil.java

package com.example.asus.networktest;
import okhttp3.OkHttpClient;
import okhttp3.Request;
public class HttpUtil {
public static void sendOkHttpRequest(final String address, final okhttp3.Callback callback) {
OkHttpClient client = new OkHttpClient;
Request request = new Request.Builder
.url(address)
.build;
client.newCall(request).enqueue(callback);
}
}

接著老規矩，寫一個實體類,裡面包含get/set方法，為了方便這裡命名為App.java

App.java

package com.example.asus.networktest;
public class App {
private String other;
private String u_Name;
private String u_id;
private String u_passWord;
private String u_token;
private String u_userName;
public String getOther {
return other;
}
public void setOther(String other) {
this.other = other;
}
public String getU_Name {
return u_Name;
}
public void setU_Name(String u_Name) {
this.u_Name = u_Name;
}
public String getU_id {
return u_id;
}
public void setU_id(String u_id) {
this.u_id = u_id;
}
public String getU_passWord {
return u_passWord;
}
public void setU_passWord(String u_passWord) {
this.u_passWord = u_passWord;
}
public String getU_token {
return u_token;
}
public void setU_token(String u_token) {
this.u_token = u_token;
}
public String getU_userName {
return u_userName;
}
public void setU_userName(String u_userName) {
this.u_userName = u_userName;
}
}

最後寫MainActivity.java

同時為了代碼的優化，和為了UI線程操作不出毛病，可以這樣寫。

MainActivity.java

package com.example.asus.networktest;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import java.io.IOException;
import java.util.List;
import okhttp3.Call;
import okhttp3.Response;
public class MainActivity extends AppCompatActivity implements View.OnClickListener{
String url="解析地址";
TextView responseText;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button sendRequest = (Button) findViewById(R.id.send_request);
responseText = (TextView) findViewById(R.id.response_text);
sendRequest.setOnClickListener(this);
}
@Override
public void onClick(View v) {
//這裡點擊事件後，點擊後調用網路請求sendRequestWithOkHttp方法
if (v.getId == R.id.send_request) {
sendRequestWithOkHttp;
}
}
private void sendRequestWithOkHttp {
new Thread(new Runnable {
@Override
public void run {
//在子線程中執行Http請求，並將最終的請求結果回調到okhttp3.Callback中
HttpUtil.sendOkHttpRequest(url,new okhttp3.Callback{
@Override
public void onResponse(Call call, Response response) throws IOException {
//得到伺服器返回的具體內容
String responseData=response.body.string;
parseJSONWithGSON(responseData);
//顯示UI界面，調用的showResponse方法
showResponse(responseData.toString);
}
@Override
public void onFailure(Call call,IOException e){
//在這裡進行異常情況處理
}
});
}
}).start;
}
private void parseJSONWithGSON(String jsonData) {
//使用輕量級的Gson解析得到的json
Gson gson = new Gson;
List appList = gson.fromJson(jsonData, new TypeToken> {}.getType);
for (App app : appList) {
//控制台輸出結果，便於查看
Log.d("MainActivity", "other" + app.getOther);
Log.d("MainActivity", "u_Name" + app.getU_Name);
Log.d("MainActivity", "u_id" + app.getU_id);
Log.d("MainActivity", "u_passWord" + app.getU_passWord);
Log.d("MainActivity", "u_token" + app.getU_token);
}
}
private void showResponse(final String response) {
//在子線程中更新UI
runOnUiThread(new Runnable {
@Override
public void run {
// 在這裡進行UI操作，將結果顯示到界面上
responseText.setText(response);
}
});
}
}