安卓通过OkHttp获取json数据
使用Http协议访问网络
OkHttp使用
可以很好的获取接口数据!json数据!
支持get和post提交方式!!!
1.引入模块
compile 'com.squareup.okhttp3:okhttp:3.4.1'
然后系统会自动引入模块
2.设置权限
<uses-permission android:name="android.permission.INTERNET" />
支持上网
3.布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<Button
android:id="@+id/send_request"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Send Request"
/>
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<TextView
android:id="@+id/response_text"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
</ScrollView>
</LinearLayout>
4.实现功能
点击按钮,获取接口数据并展示
package demo.jq.com.networktest;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import java.io.BufferedReader;
import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import okhttp3.FormBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
/**
* @author jim
*/
public class MainActivity extends AppCompatActivity implements View.OnClickListener{
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) {
if (v.getId() == R.id.send_request) {
sendRequestWithOkHttp();
}
}
private void sendRequestWithOkHttp() {
// 开启线程来发起网络请求
new Thread(new Runnable() {
@Override
public void run() {
HttpURLConnection connection = null;
BufferedReader reader = null;
try {
OkHttpClient client = new OkHttpClient();
// post请求
RequestBody requestBody = new FormBody.Builder()
.add("type","1")
.build();
Request request = new Request.Builder()
.url("http://devmg.yunlutong.com/api/test/testApi")
.post(requestBody)
.build();
Response response = client.newCall(request).execute();
String responseData = response.body().string();
showResponse(responseData);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (reader != null) {
try {
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (connection != null) {
connection.disconnect();
}
}
}
}).start();
}
private void showResponse(final String response) {
runOnUiThread(new Runnable() {
@Override
public void run() {
responseText.setText(response);
}
});
}
}