從網絡中獲取數據

activity_main.xml

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"><TextView android:id="@+id/tv"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="xx"/><Button android:id="@+id/btn"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_below="@+id/tv"android:layout_margin="20dp"android:text="Button"/> </RelativeLayout>

MainActivity.java

package com.app.okhttptest;import android.os.Handler; import android.os.Message; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView;import com.squareup.okhttp.OkHttpClient; import com.squareup.okhttp.Request; import com.squareup.okhttp.Response;import java.io.IOException;public class MainActivity extends AppCompatActivity implements View.OnClickListener{private OkHttpClient client;private Request request;private Response response;private TextView textView;private Button btn;private Handler mHandler = new Handler(){@Overridepublic void handleMessage(Message msg) {String info = (String) msg.obj;textView.setText(info);}};@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);textView = (TextView) findViewById(R.id.tv);btn = (Button) findViewById(R.id.btn);btn.setOnClickListener(this);}@Overridepublic void onClick(View v) {Thread thread = new Thread(new Task());thread.start();}class Task implements Runnable{@Overridepublic void run() {client = new OkHttpClient();request = new Request.Builder().url("http://www.baidu.com").build();Message msg = new Message();try {response = client.newCall(request).execute();} catch (IOException e) {e.printStackTrace();}if(response.isSuccessful()){String body = response.body().toString();msg.obj = body;}mHandler.sendMessage(msg);}}}

總結

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