MainActivity.class
1 package com.example.administrator.okhttp3; 2 3 import android.support.v7.app.AppCompatActivity; 4 import android.os.Bundle; 5 import android.util.Log; 6 import android.view.View; 7 import android.widget.Button; 8 import android.widget.TextView; 9 10 import java.io.File; 11 import java.io.FileOutputStream; 12 import java.io.IOException; 13 import java.io.InputStream; 14 15 import okhttp3.Call; 16 import okhttp3.Callback; 17 import okhttp3.FormBody; 18 import okhttp3.OkHttpClient; 19 import okhttp3.Request; 20 import okhttp3.RequestBody; 21 import okhttp3.Response; 22 23 public class MainActivity extends AppCompatActivity implements View.OnClickListener { 24 private static OkHttpClient client = new OkHttpClient(); 25 private Request request; 26 private Response response; 27 28 private Button button1, button2, button3, button4; 29 private TextView textView; 30 31 @Override 32 protected void onCreate(Bundle savedInstanceState) { 33 super.onCreate(savedInstanceState); 34 setContentView(R.layout.activity_main); 35 button1 = (Button) findViewById(R.id.btn_one); 36 button2 = (Button) findViewById(R.id.btn_two); 37 button3 = (Button) findViewById(R.id.btn_three); 38 button4 = (Button) findViewById(R.id.btn_four); 39 button1.setOnClickListener(this); 40 button2.setOnClickListener(this); 41 button3.setOnClickListener(this); 42 button4.setOnClickListener(this); 43 textView = (TextView) findViewById(R.id.tv); 44 } 45 46 @Override 47 public void onClick(View view) { 48 switch (view.getId()) { 49 case R.id.btn_one://同步get 50 client = new OkHttpClient(); 51 request = new Request.Builder().url("http://cache.video.iqiyi.com/jp/avlist/202861101/1/?callback=jsonp9").build(); 52 new Thread(new Runnable() { 53 @Override 54 public void run() { 55 try { 56 response = client.newCall(request).execute(); 57 final String src = response.body().string(); 58 Log.e("Tag", response.body().string()); 59 runOnUiThread(new Runnable() { 60 @Override 61 public void run() { 62 textView.setText(src); 63 } 64 }); 65 66 } catch (IOException e) { 67 e.printStackTrace(); 68 } 69 } 70 }).start(); 71 72 break; 73 case R.id.btn_two://异步get 74 request = new Request.Builder().url("http://cache.video.iqiyi.com/jp/avlist/202861101/1/?callback=jsonp9").build(); 75 client.newCall(request).enqueue(new Callback() { 76 @Override 77 public void onFailure(Call call, IOException e) { 78 79 } 80 81 @Override 82 public void onResponse(Call call, Response response) throws IOException { 83 final String src = response.body().string(); 84 Log.e("Tag", response.body().string()); 85 runOnUiThread(new Runnable() { 86 @Override 87 public void run() { 88 textView.setText(src); 89 } 90 }); 91 } 92 }); 93 break; 94 case R.id.btn_three://提交表单 95 RequestBody requestBody = new FormBody.Builder() 96 .add("search", "papap").build(); 97 request = new Request.Builder().url("https://en.wikipedia.org/w/index.php").post(requestBody).build(); 98 client.newCall(request).enqueue(new Callback() { 99 @Override 100 public void onFailure(Call call, IOException e) { 101 102 } 103 104 @Override 105 public void onResponse(Call call, Response response) throws IOException { 106 final String src = response.body().string(); 107 runOnUiThread(new Runnable() { 108 @Override 109 public void run() { 110 textView.setText(src); 111 } 112 }); 113 } 114 }); 115 break; 116 case R.id.btn_four://文件下载 117 request = new Request.Builder().url("http://pic2.ooopic.com/10/18/01/04bOOOPICb3.jpg").build(); 118 client.newCall(request).enqueue(new Callback() { 119 @Override 120 public void onFailure(Call call, IOException e) { 121 122 } 123 124 @Override 125 public void onResponse(Call call, Response response) throws IOException { 126 InputStream inputStream = response.body().byteStream(); 127 FileOutputStream fileOutputStream = new FileOutputStream(new File("/sdcard/tupian.jpg")); 128 byte[] buffer = new byte[2048];//每次循环读取2K的数据 129 130 int len = 0; 131 while ((len = inputStream.read(buffer)) != -1) { 132 fileOutputStream.write(buffer, 0, len); 133 } 134 fileOutputStream.flush(); 135 136 runOnUiThread(new Runnable() { 137 @Override 138 public void run() { 139 textView.setText("文件下载成功。。。"); 140 } 141 }); 142 } 143 }); 144 break; 145 } 146 } 147 }
PS：需要注意的是，在进行同步Get网络请求时，因为都是一个耗时操作，所以需要建立一个子线程去进行请求； 并且，UI界面的更新，必须放在主线程去完成！
activity_main.xml
1 <?xml version="1.0" encoding="utf-8"?> 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 3 xmlns:tools="http://schemas.android.com/tools" 4 android:layout_width="match_parent" 5 android:layout_height="match_parent" 6 android:orientation="vertical" 7 android:paddingBottom="@dimen/activity_vertical_margin" 8 android:paddingLeft="@dimen/activity_horizontal_margin" 9 android:paddingRight="@dimen/activity_horizontal_margin" 10 android:paddingTop="@dimen/activity_vertical_margin" 11 tools:context="com.example.administrator.okhttp3.MainActivity"> 12 13 <Button 14 android:id="@+id/btn_one" 15 android:layout_width="wrap_content" 16 android:layout_height="wrap_content" 17 android:text="同步get" /> 18 19 <Button 20 android:id="@+id/btn_two" 21 android:layout_width="wrap_content" 22 android:layout_height="wrap_content" 23 android:text="异步get" /> 24 25 <Button 26 android:id="@+id/btn_three" 27 android:layout_width="wrap_content" 28 android:layout_height="wrap_content" 29 android:text="Post提交表单" /> 30 31 <Button 32 android:id="@+id/btn_four" 33 android:layout_width="wrap_content" 34 android:layout_height="wrap_content" 35 android:text="文件下载" /> 36 37 <TextView 38 android:id="@+id/tv" 39 android:layout_width="wrap_content" 40 android:layout_height="wrap_content" 41 android:text="text"/> 42 </LinearLayout>
