Android的Okhttp框架之post、get用法讲解(落雨敏)

Android的Okhttp框架之post、get用法讲解(落雨敏)

         前言:okhttp作为Android主流网络框架之一,但在近日okhttp网络请求却比较火，主要原因是在谷歌官方在6.0以后在Android sdk已经移除了httpClient,加入我们okHttp。在常用的框架之中( volley，Retrofit，OKHttp等)，我比较喜欢使用OKHttp。OkHttp是一个现代，快速，高效的Http client，OkHttp使用Okio来大大简化数据的访问与存储，Okio是一个增强 java.io 和java.nio的库。(最下面实例源码下载)
   博主在此介绍常用功能的使用:
   1、Get请求(同步和异步)；
   2、POST请求表单(key-value)；
   3、POST请求提交(JSON/String等)；
   4、文件下载；
   5、文件上传；
   6、图片缓存加载
    首先，下载okhttp、okio的jar包，将其包加入到项目中 ，方便使用。post、get、上传、下载等，都封装在一个工具类，方便调用。
(1)工具类——UtilOkHttp
//post请求编码
private static final MediaType JSON= MediaType.parse("application/json; charset=utf-8");
//设置请求超时等
static {
wBuilder().connectTimeout(10, TimeUnit.SECONDS);
wBuilder().readTimeout(10, TimeUnit.SECONDS);
wBuilder().writeTimeout(10, TimeUnit.SECONDS);
}
//创建对象
private static  OkHttpClient client=new OkHttpClient();
//-------------------------------同步get-------------------------------------------------------------------------------------------

public static void  get_T(String url,final Handler handler) {final Request request = new Request.Builder().url(url).build();new Thread(new Runnable() {@Overridepublic void run() {try {Response response&#wCall(request).execute();if( response.isSuccessful()){returns=response.body().string();Log.i("test","get同步请求成功"+ returns);Message msg1=new Message();msg1.what=1;msg1.obj=returns;handler.sendMessage(msg1);}else{returns="请求失败";Log.i("test","get同步请求失败"+ returns);}} catch (IOException e) {e.printStackTrace();}}}).start();}

 //-----------------------------------get异步-------------------------------------------------------------------------------------------

public static void get_Y(String url,final Handler handler){Request request = new Request.Builder().url(url).build();wCall(request).enqueue(new Callback() {@Overridepublic void onResponse(Call arg0, Response arg1) throws IOException {if(arg1.isSuccessful()){returns=arg1.body().string();Log.i("test","get异步请求成功，返回returns的值:"+ returns);Message msg2=new Message();msg2.what=2;msg2.obj=returns;handler.sendMessage(msg2);}else{Log.i("test","get异步请求成功，返回NO:");}}@Overridepublic void onFailure(Call arg0, IOException arg1) {Log.i("test","get异步请求失败"+ String());}});}

//------------------------------------post表单------------------------------------------------------------------------------------------------

public static void post_Form(String url,String key,String value,final Handler handler){FormBody requestBody=new FormBody.Builder().add(key, value).build();Request request=new Request.Builder().url(url).addHeader("Content-Type", "application/json; charset=UTF-8")                             .post(requestBody).build();wCall(request).enqueue(new Callback() {@Overridepublic void onResponse(Call arg0, Response arg1) throws IOException {if(arg1.isSuccessful()){returns=arg1.body().string();Log.i("test","post表单请求成功,返回ok=returns:"+returns);Message msg3=new Message();msg3.what=3;msg3.obj=returns;handler.sendMessage(msg3);}else {Log.i("test","post表单请求成功,返回NO");}	}@Overridepublic void onFailure(Call arg0, IOException arg1) {Log.i("test","post表单请求失败");	}});Log.i("test","post表单请求成功,方法完成"+returns);}

//--------------------------------------post的josn-----------------------------------------------------------------------------------------------

	public static void post_Json(String url, String json){RequestBody body&#ate(JSON, json);Request request=new Request.Builder().url(url).post(body).build();wCall(request).enqueue(new Callback() {@Overridepublic void onResponse(Call arg0, Response arg1) throws IOException {if(arg1.isSuccessful()){returns=arg1.body().string();Log.i("test","post-json请求成功,返回ok:"+returns);}else {Log.i("test","post-json请求成功,返回NO");}}@Overridepublic void onFailure(Call arg0, IOException arg1) {Log.i("test","post-json请求失败"&#String());}});}

//---------------------------------------get异步请求图片-------------------------------------------------------------------------------------

public static void get_Bitmap(String url,final Handler handler){Request request=new Request.Builder().url(url).build();wCall(request).enqueue(new Callback() {@Overridepublic void onResponse(Call arg0, Response arg1) throws IOException {byte [] by=arg1.body().bytes();bitmap=BitmapFactory.decodeByteArray(by, 0, by.length);Log.i("test", "get请求图片成功,返回OK");Message msg4=new Message();msg4.what=4;msg4.obj=bitmap;handler.sendMessage(msg4);}	@Overridepublic void onFailure(Call arg0, IOException arg1) {Log.i("test", "get异步请求图片失败");}});}

//----------------------------------------get异步文件下载-------------------------------------------------------------------------------------

public static void get_Y_FileDown(String url,final String path_up,final String saveName,final Handler handler){Request request=new Request.Builder().url(url).build();wCall(request).enqueue(new Callback() {@Overridepublic void onResponse(Call arg0, Response arg1) throws IOException {InputStream is = arg1.body().byteStream();// 把请求成功的response转为字节流FileOutputStream os = new FileOutputStream(new File(path_up,saveName));//文件输出流，本地存byte[] buffer = new byte[2048];//每次循环读取2K的数据int len = 0;while ((len = is.read(buffer)) != -1) {os.write(buffer, 0, len);Log.i("test", "图片大小:"+len);}os.flush();os.close();is.close();Log.i("test", "get异步请求文件下载成功,返回完成数据");returns="下载成功";Message msg5=new Message();msg5.what=5;msg5.obj=returns;handler.sendMessage(msg5);}@Overridepublic void onFailure(Call arg0, IOException arg1) {Log.i("test", "get异步请求文件下载失败");returns="下载请求失败";}});}

//----------------------------------------post文件上传-----------------------------------------------------------------------------------------

public static String post_Y_FileUp(String url,String path, String fileName,final Handler handler){//上传图片File f1 = new File( path+ fileName); Log.i("test", "文件路径:"+path+fileName);ists()){Log.i("test", "文件存在");}else {Log.i("test", "文件不存在");}RequestBody fileBody1&#ate(MediaType.parse("application/octet-stream") , f1);  //form的分割线,自己定义String boundary = "xx--------------------------------------------------------------xx";MultipartBody mBody = new MultipartBody.Builder(boundary).setType(MultipartBody.FORM)  //.addFormDataPart("lin" , "123")  .addFormDataPart("file" ,fileName, fileBody1)  .build(); Request request=new Request.Builder().url(url).post(fileBody1).build();wCall(request).enqueue(new Callback() {@Overridepublic void onResponse(Call arg0, Response arg1) throws IOException {if(arg1.isSuccessful()){returns=arg1.body().string();Log.i("test","post文件上传成功,返回ok=returns:"+returns);Message msg6=new Message();msg6.what=6;msg6.obj=returns;handler.sendMessage(msg6);}else {Log.i("test", "post异步请求文件上传成功,未完成");}}@Overridepublic void onFailure(Call arg0, IOException arg1) {Log.i("test", "post异步请求文件上传失败");}});return fileName;}
}

//-----------------------------------------------封装类(全部代码)----------------------------------------------------------------------

ls;import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import urrent.TimeUnit;import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.FormBody;
import okhttp3.MediaType;
import okhttp3.MultipartBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
aphics.Bitmap;
aphics.BitmapFactory;
import android.os.Handler;
import android.os.Message;
import android.util.Log;public class UtilOkHttp {private static final MediaType JSON= MediaType.parse("application/json; charset=utf-8");//post请求编码private static String  returns;//返回字符private static Bitmap  bitmap;//返回图片private static  OkHttpClient client=new OkHttpClient();static {wBuilder().connectTimeout(10, TimeUnit.SECONDS);wBuilder().readTimeout(10, TimeUnit.SECONDS);wBuilder().writeTimeout(10, TimeUnit.SECONDS);}//-------------------------------同步get-------------------------------------------public static void  get_T(String url,final Handler handler) {final Request request = new Request.Builder().url(url).build();new Thread(new Runnable() {@Overridepublic void run() {try {Response response&#wCall(request).execute();if( response.isSuccessful()){returns=response.body().string();Log.i("test","get同步请求成功"+ returns);Message msg1=new Message();msg1.what=1;msg1.obj=returns;handler.sendMessage(msg1);}else{returns="请求失败";Log.i("test","get同步请求失败"+ returns);}} catch (IOException e) {e.printStackTrace();}}}).start();}//-----------------------------------get异步-----------------------------------------------------public static void get_Y(String url,final Handler handler){Request request = new Request.Builder().url(url).build();wCall(request).enqueue(new Callback() {@Overridepublic void onResponse(Call arg0, Response arg1) throws IOException {if(arg1.isSuccessful()){returns=arg1.body().string();Log.i("test","get异步请求成功，返回returns的值:"+ returns);Message msg2=new Message();msg2.what=2;msg2.obj=returns;handler.sendMessage(msg2);}else{Log.i("test","get异步请求成功，返回NO:");}}@Overridepublic void onFailure(Call arg0, IOException arg1) {Log.i("test","get异步请求失败"+ String());}});}//------------------------------------post表单------------------------------------------------public static void post_Form(String url,String key,String value,final Handler handler){FormBody requestBody=new FormBody.Builder().add(key, value).build();Request request=new Request.Builder().url(url).addHeader("Content-Type", "application/json; charset=UTF-8")                             .post(requestBody).build();wCall(request).enqueue(new Callback() {@Overridepublic void onResponse(Call arg0, Response arg1) throws IOException {if(arg1.isSuccessful()){returns=arg1.body().string();Log.i("test","post表单请求成功,返回ok=returns:"+returns);Message msg3=new Message();msg3.what=3;msg3.obj=returns;handler.sendMessage(msg3);}else {Log.i("test","post表单请求成功,返回NO");}	}@Overridepublic void onFailure(Call arg0, IOException arg1) {Log.i("test","post表单请求失败");	}});Log.i("test","post表单请求成功,方法完成"+returns);}//-----------------------------------post的josn-------------------------------------public static void post_Json(String url, String json){RequestBody body&#ate(JSON, json);Request request=new Request.Builder().url(url).post(body).build();wCall(request).enqueue(new Callback() {@Overridepublic void onResponse(Call arg0, Response arg1) throws IOException {if(arg1.isSuccessful()){returns=arg1.body().string();Log.i("test","post-json请求成功,返回ok:"+returns);}else {Log.i("test","post-json请求成功,返回NO");}}@Overridepublic void onFailure(Call arg0, IOException arg1) {Log.i("test","post-json请求失败"&#String());}});}//---------------------------------------get异步请求图片------------------------------------------------public static void get_Bitmap(String url,final Handler handler){Request request=new Request.Builder().url(url).build();wCall(request).enqueue(new Callback() {@Overridepublic void onResponse(Call arg0, Response arg1) throws IOException {byte [] by=arg1.body().bytes();bitmap=BitmapFactory.decodeByteArray(by, 0, by.length);Log.i("test", "get请求图片成功,返回OK");Message msg4=new Message();msg4.what=4;msg4.obj=bitmap;handler.sendMessage(msg4);}	@Overridepublic void onFailure(Call arg0, IOException arg1) {Log.i("test", "get异步请求图片失败");}});}//----------------------------------------get异步文件下载-------------------------------------------------------public static void get_Y_FileDown(String url,final String path_up,final String saveName,final Handler handler){Request request=new Request.Builder().url(url).build();wCall(request).enqueue(new Callback() {@Overridepublic void onResponse(Call arg0, Response arg1) throws IOException {InputStream is = arg1.body().byteStream();// 把请求成功的response转为字节流FileOutputStream os = new FileOutputStream(new File(path_up,saveName));//文件输出流，本地存byte[] buffer = new byte[2048];//每次循环读取2K的数据int len = 0;while ((len = is.read(buffer)) != -1) {os.write(buffer, 0, len);Log.i("test", "图片大小:"+len);}os.flush();os.close();is.close();Log.i("test", "get异步请求文件下载成功,返回完成数据");returns="下载成功";Message msg5=new Message();msg5.what=5;msg5.obj=returns;handler.sendMessage(msg5);}@Overridepublic void onFailure(Call arg0, IOException arg1) {Log.i("test", "get异步请求文件下载失败");returns="下载请求失败";}});}//----------------------------------------post文件上传-------------------------------------------------------public static String post_Y_FileUp(String url,String path, String fileName,final Handler handler){//上传图片File f1 = new File( path+ fileName); Log.i("test", "文件路径:"+path+fileName);ists()){Log.i("test", "文件存在");}else {Log.i("test", "文件不存在");}RequestBody fileBody1&#ate(MediaType.parse("application/octet-stream") , f1);  //form的分割线,自己定义String boundary = "xx--------------------------------------------------------------xx";MultipartBody mBody = new MultipartBody.Builder(boundary).setType(MultipartBody.FORM)  //.addFormDataPart("lin" , "123")  .addFormDataPart("file" ,fileName, fileBody1)  .build(); Request request=new Request.Builder().url(url).post(fileBody1).build();wCall(request).enqueue(new Callback() {@Overridepublic void onResponse(Call arg0, Response arg1) throws IOException {if(arg1.isSuccessful()){returns=arg1.body().string();Log.i("test","post文件上传成功,返回ok=returns:"+returns);Message msg6=new Message();msg6.what=6;msg6.obj=returns;handler.sendMessage(msg6);}else {Log.i("test", "post异步请求文件上传成功,未完成");}}@Overridepublic void onFailure(Call arg0, IOException arg1) {Log.i("test", "post异步请求文件上传失败");}});return fileName;}
}

(2)、Activity的调用(直接上全部源码)

ample.okhttpt;import android.app.Activity;
aphics.Bitmap;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;ls.UtilOkHttp;public class MainActivity extends Activity {private Button bt_get,bt_getY,bt_post,bt_fileup,bt_filedown,bt_img;private ImageView iv;private TextView tv;private String back_str;private String url="/?callback=jsonp9";private String posturl=".htm";private String url2 = "=yuantong&postid=229728279823";private String url3=".jpg";@Overrideprotected void onCreate(Bundle savedInstanceState) {Create(savedInstanceState);setContentView(R.layout.activity_main);init();}private Handler handler=new Handler(){public void handleMessage(Message msg) {if(msg.what==1){tv.setText(msg.obj+"");}if(msg.what==2){tv.setText(msg.obj+"");}if(msg.what==3){tv.setText(msg.obj+"");}if(msg.what==4){iv.setImageBitmap((Bitmap) msg.obj);  }if(msg.what==5){tv.setText(msg.obj+"");}if(msg.what==6){tv.setText(msg.obj+"");}};};private void init() {bt_get=(Button) findViewById(R.id.bt_get);bt_get.setOnClickListener(new MyListener());bt_getY=(Button) findViewById(R.id.bt_getY);bt_getY.setOnClickListener(new MyListener());bt_post=(Button) findViewById(R.id.bt_post);bt_post.setOnClickListener(new MyListener());bt_fileup=(Button) findViewById(R.id.bt_fileup);bt_fileup.setOnClickListener(new MyListener());bt_filedown=(Button) findViewById(R.id.bt_filedown);bt_filedown.setOnClickListener(new MyListener());bt_img=(Button) findViewById(R.id.bt_img);bt_img.setOnClickListener(new MyListener());iv=(ImageView) findViewById(R.id.img);tv=(TextView) findViewById(R.id.tv);}class MyListener implements OnClickListener{@Overridepublic void onClick(View v) {switch (v.getId()) {case R.id.bt__T(url,handler);break;case R.id.bt__Y(url2,handler);break;	case R.id.bt_post:UtilOkHttp.post_Form(posturl, "tel", "15850781443",handler);break;case R.id.bt_filedown:String path_up&#ExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM).getAbsolutePath();_Y_FileDown(url3, path_up, "liuyifei2.jpg",handler);break;case R.id.bt_img:   _Bitmap(url3,handler);break;case R.id.bt_fileup:String url="192.168.1.145:8080/ServletWeb/servlet/MyServlet";String path_Up&#ExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM).getAbsolutePath()+"/";//OkHttpUtil.post_Form(url, "chen", "520", handler);UtilOkHttp.post_Y_FileUp(url, path_Up, "liuyifei2.jpg",handler);break;default:break;}}}}

(3)、xml全部源码

<LinearLayout xmlns:android=""xmlns:tools=""android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"tools:context=&#ample.okhttpt.MainActivity"><Button android:id="@+id/bt_get"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="同步get请求"/><Button android:id="@+id/bt_getY"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="异步get请求"/><Button android:id="@+id/bt_post"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="post表单请求或json"/><Button android:id="@+id/bt_filedown"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="get异步下载文件"/><Button android:id="@+id/bt_fileup"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="post上传文件"/><Button android:id="@+id/bt_img"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="get异步请求图片"/><ImageView android:id="@+id/img"android:layout_width="200dp"android:layout_height="200dp"/><TextView android:id="@+id/tv"android:layout_width="match_parent"android:layout_height="fill_parent"android:text="内容:"/></LinearLayout>

(4)、需要的权限
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
(5)、效果图（部分方法效果图,剩下的截图交给你们了）




(6)、免费下载全部实例代码（注释更全,更完善）