使用okhttp进行图片下载，上传，get,post网络请求

github源码地址：

效果：

依赖：

compile 'com.squareup.okhttp3:okhttp:3.6.0'

权限：

<uses-permission android:name="android.permission.INTERNET"></uses-permission>

代码：

1.okhttp网络工具类——OkManager

package com.example.imoocdict;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Log;

import java.io.IOException;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.FormBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
import okhttp3.ResponseBody;

/**
* Created  on 17/4/11.
* gradle添加依赖  compile 'com.squareup.okhttp3:okhttp:3.6.0'
*/

public class OkManager {
private OkHttpClient client;

//private final String TAG = OkManager.class.getSimpleName();//获得类名
private final String TAG = "GsonUtils";

private OkManager() {
client = new OkHttpClient();
//设置连接超时时间为10s
client.newBuilder().connectTimeout(10, TimeUnit.SECONDS).readTimeout(10, TimeUnit.SECONDS)
.writeTimeout(10, TimeUnit.SECONDS);
}

//private volatile static OkManager okManager;
//采用单例模式获取对象
/* public static OkManager getInstance() {
OkManager instance = null;
if (null == okManager) {
//同步锁
synchronized (OkManager.class) {
if (null == instance) {
instance = new OkManager();
okManager = instance;
}
}
}
return instance;
}*/

private static OkManager okManager;
//创建 单例模式（OkHttp官方建议如此操作）
public static OkManager getInstance() {
if (null == okManager) {
synchronized (OkManager.class) {
okManager = new OkManager();
}
}
return okManager;
}

/**
* 同步请求，在android开发中不常用，因为会阻塞UI线程
*
* @param url
* @return
*/
public String syncGetByURL(String url) {
Request request = new Request.Builder().url(url).build();
Response response = null;
try {
response = client.newCall(request).execute();
if (null != response && response.isSuccessful()) {
return response.body().string();
}
} catch (IOException e) {
e.printStackTrace();
Log.d(TAG, e.toString());
}
return null;
}

/**
* 异步get请求方式获取bitmap,通过接口回调获取
*
* @param url
*/
public void getBitmap(String url) {
final Request request = new Request.Builder().get().url(url).build();
client.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
Log.d(TAG, "onFailure_IOException" + e.toString());
if (null != okManagerBitmapListner) {
okManagerBitmapListner.onResponseFailure(call, e);
}
}

@Override
public void onResponse(Call call, Response response) throws IOException {
Log.d(TAG, "onResponse=");
if (response != null && response.isSuccessful()) {
byte[] bytes = response.body().bytes();
Bitmap bitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
//方法二,可以获取字节流,然后转换成图片
//InputStream inputStream = response.body().byteStream();
//Bitmap bitmap1 = BitmapFactory.decodeStream(inputStream);
if (null != okManagerBitmapListner) {
okManagerBitmapListner.onResponseBitmap(bitmap);
}
}
}
});
}

/**
* 异步get请求获取String类型的json数据
*
* @param url
* @return
*/
public void getString(String url) {

final Request request = new Request.Builder().url(url).get().build();
client.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
Log.d(TAG, "IOException" + e.toString());
if (null != okManagerStringListner) {
okManagerStringListner.onResponseFailure(call, e);
}
}

@Override
public void onResponse(Call call, Response response) throws IOException {
if (null != response && response.isSuccessful()) {
ResponseBody body = response.body();
String string = body.string();
Log.d(TAG, "string=" + string);
if (null != okManagerStringListner) {
okManagerStringListner.onResponseString(string);
}
}
}
});

}

/**
* post表单请求提交,获取json字符串
*
* @param url
* @param params
*/
public void postComplexForm(String url, Map<String, String> params) {

FormBody.Builder builder = new FormBody.Builder();//表单对象，包含以input开始的对象，以html表单为主
//把map集合中的参数添加到FormBody表单中.
if (null != params && !params.isEmpty()) {
for (Map.Entry<String, String> entry : params.entrySet()) {
builder.add(entry.getKey(), entry.getValue());
}
RequestBody requestBody = builder.build();//创建请求体
Request request = new Request.Builder().url(url).post(requestBody).build();
client.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
Log.d(TAG, "IOException" + e.toString());
if (null != okManagerStringListner) {
okManagerStringListner.onResponseFailure(call, e);
}
}

@Override
public void onResponse(Call call, Response response) throws IOException {
if (null != response && response.isSuccessful()) {
String string = response.body().string();
Log.d(TAG, "string=" + string);
if (null != okManagerStringListner) {
okManagerStringListner.onResponseString(string);
}
}
}
});

}
}

/**
* Bitmap的接口
*/
interface OkManagerBitmapListner {
void onResponseBitmap(Bitmap bitmap);

void onResponseFailure(Call call, IOException e);
}

public OkManagerBitmapListner getOkManagerBitmapListner() {
return okManagerBitmapListner;
}

public void setOkManagerBitmapListner(OkManagerBitmapListner okManagerListner) {
this.okManagerBitmapListner = okManagerListner;
}

private OkManagerBitmapListner okManagerBitmapListner;

/**
* String的接口
*/
interface OkManagerStringListner {
void onResponseString(String string);

void onResponseFailure(Call call, IOException e);
}

private OkManagerStringListner okManagerStringListner;

public OkManagerStringListner getOkManagerStringListner() {
return okManagerStringListner;
}

public void setOkManagerStringListner(OkManagerStringListner okManagerStringListner) {
this.okManagerStringListner = okManagerStringListner;
}

}

2.主代码

package com.example.imoocdict;

import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
import android.util.Base64;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

import okhttp3.Call;

/**
* 使用okhttp进行图片下载，上传，get,post网络请求
*/
public class MainActivity extends AppCompatActivity implements View.OnClickListener {

private static final String TAG = "GsonUtils";
private static final int SUCCESS_STATUS = 1;
private static final int ERROR_STATUS = 0;
private TextView voice;
private EditText input;
private Button find;
private LinearLayout activity_main;
private String findWords;
private String string;
private Button syncgetbyurl;
private Button syncgetdrawableurl;
private ImageView imageView;
private OkManager okManager;
private TextView translate;
private Button upload;
private Looper mainLooper;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
mainLooper = Looper.getMainLooper();
//okManager = OkManager.getInstance();
}

private void initView() {
voice = (TextView) findViewById(R.id.voice);
input = (EditText) findViewById(R.id.input);
find = (Button) findViewById(R.id.find);
activity_main = (LinearLayout) findViewById(R.id.activity_main);

find.setOnClickListener(this);
syncgetbyurl = (Button) findViewById(R.id.syncgetbyurl);
syncgetbyurl.setOnClickListener(this);
syncgetdrawableurl = (Button) findViewById(R.id.syncgetdrawableurl);
syncgetdrawableurl.setOnClickListener(this);
imageView = (ImageView) findViewById(R.id.imageView);
imageView.setOnClickListener(this);
translate = (TextView) findViewById(R.id.translate);
translate.setOnClickListener(this);
upload = (Button) findViewById(R.id.upload);
upload.setOnClickListener(this);
}

String rootPath = "http://fanyi.youdao.com/openapi.do";
/**
* 有道词典提供的api查询接口,q=后面拼接的是需要查询的单词
* 参考网站
* 例如：查询words，对应的http://fanyi.youdao.com/openapi.do?keyfrom=imoocdict123456&key=324273592
* &type=data&doctype=json&version=1.1&q=words
*/
String path = "http://fanyi.youdao.com/openapi.do?keyfrom=imoocdict123456&key=324273592&" +
"type=data&doctype=json&version=1.1&q=";

Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
//图片上传成功的标识
if (msg.what == SUCCESS_STATUS) {
Log.d(TAG, "SUCCESS_STATUS=");
findString = "图片上传成功，返回的json为:" + (String) msg.obj;
translate.setText(findString);
}
if (msg.what == ERROR_STATUS) {
Log.d(TAG, "ERROR_STATUS=");
translate.setText("网络异常，服务器繁忙");
//Toast.makeText(MainActivity.this, "网络异常，服务器繁忙", Toast.LENGTH_SHORT).show();
}
}
};
String findString;

@Override
public void onClick(View v) {
submit();
switch (v.getId()) {
case R.id.find:
final String findUrl = path + findWords;
if (null == okManager) {
okManager = OkManager.getInstance();
}
Log.d(TAG, "findUrl=" + findUrl);
Log.d(TAG, "okManager=" + okManager);
okManager.setOkManagerStringListner(new OkManager.OkManagerStringListner() {
@Override
public void onResponseString(String string) {
findString = string;
Log.d(TAG, "findString=" + findString);
//在ui主线程中更新ui
/* handler.post(new Runnable() {
@Override
public void run() {
translate.setText(findString);
}
});*/
Message message = Message.obtain();
message.what = SUCCESS_STATUS;
message.obj = string;
handler.sendMessage(message);
}

@Override
public void onResponseFailure(Call call, IOException e) {
//Toast需要在ui主线程中Looper中执行
//                        mainLooper.prepare();
//                        new Handler().post(new Runnable() {
//                            @Override
//                            public void run() {
//                                Toast.makeText(MainActivity.this,
// "网络异常，服务器繁忙", Toast.LENGTH_SHORT).show();
//                            }
//                        });
//
//                        mainLooper.loop();
//错误：Can't create handler inside thread that has not called Looper.prepare()

/* MainActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(MainActivity.this, "网络异常，服务器繁忙", Toast.LENGTH_SHORT).show();
}
});*/
Message message = Message.obtain();
message.what = ERROR_STATUS;
handler.sendMessage(message);
}
});
//进行get请求
okManager.getString(findUrl);

break;
case R.id.syncgetbyurl:
if (null == okManager) {
okManager = OkManager.getInstance();
}
okManager.setOkManagerStringListner(new OkManager.OkManagerStringListner() {
@Override
public void onResponseString(String string) {
findString = string;
Log.d(TAG, "findString=" + findString);
handler.post(new Runnable() {
@Override
public void run() {
translate.setText(findString);
}
});
}

@Override
public void onResponseFailure(Call call, IOException e) {

}
});
Map<String, String> params = new HashMap<>();
params.put("keyfrom", "imoocdict123456");
params.put("key", "324273592");
params.put("type", "data");
params.put("doctype", "json");
params.put("version", "1.1");
params.put("q", findWords);
//进行post请求
okManager.postComplexForm(rootPath, params);
break;
case R.id.syncgetdrawableurl:
if (null == okManager) {
okManager = OkManager.getInstance();
}
String imageUrl = "https://www.baidu.com/img/bd_logo1.png";
okManager.setOkManagerBitmapListner(new OkManager.OkManagerBitmapListner() {
@Override
public void onResponseBitmap(Bitmap bitmap) {
Log.d(TAG, "imageBitmap");
imageBitmap = bitmap;
//在主线程中更新ui
MainActivity.this.runOnUiThread(imageRunnable);
}

@Override
public void onResponseFailure(Call call, IOException e) {
MainActivity.this.runOnUiThread(new Runnable() {
@Override
public void run() {
Toast.makeText(MainActivity.this, "网络异常，服务器繁忙",
Toast.LENGTH_SHORT).show();
}
});
}
});
//加载网络图片
okManager.getBitmap(imageUrl);
break;
case R.id.upload:
if (null == okManager) {
okManager = OkManager.getInstance();
}
//从资源中获取的Drawable --> Bitmap
Resources resources = getResources();
Bitmap bitmap = BitmapFactory.decodeResource(resources, R.drawable.login_bg);
/***开发中使用bitmap转换成base64格式的字符串，提交给服务器***/
//String base64 = "/9j/4AAQSkZJRgABAQAAAQABAAD";
String base64 = bitmapToBase64(bitmap);
Log.d(TAG, "base64=" + base64);
// 这是本地服务器的上传测试地址
String uploadUrl = "http://192.168.2.241/upark/upload";
Map<String, String> loadParams = new HashMap<>();
loadParams.put("id", "-1");
loadParams.put("base64", base64);
loadParams.put("type", "png");
loadParams.put("model", "groupService");
loadParams.put("serverCode", "other");
okManager.setOkManagerStringListner(new OkManager.OkManagerStringListner() {
@Override
public void onResponseString(String string) {
//图片上传的成功回调
findString = string;
Log.d(TAG, "findString=" + findString);
Message message = Message.obtain();
message.what = SUCCESS_STATUS;
message.obj = findString;
handler.sendMessage(message);
}

@Override
public void onResponseFailure(Call call, IOException e) {
//Toast需要在ui主线程中Looper中执行
mainLooper.prepare();
Toast.makeText(MainActivity.this, "网络异常，服务器繁忙",
Toast.LENGTH_SHORT).show();
mainLooper.loop();
}
});
//进行图片的上传
okManager.postComplexForm(uploadUrl, loadParams);
break;
}
}

private Bitmap imageBitmap;
//展示加载的图片
Runnable imageRunnable = new Runnable() {
@Override
public void run() {
imageView.setImageBitmap(imageBitmap);
}
};

private void submit() {
// validate
String inputString = input.getText().toString().trim();
if (TextUtils.isEmpty(inputString)) {
Toast.makeText(this, "inputString不能为空", Toast.LENGTH_SHORT).show();
return;
}
findWords = inputString;
// TODO validate success, do something
}

/**
* bitmap转为base64
*
* @param bitmap
* @return
*/
public String bitmapToBase64(Bitmap bitmap) {
String result = null;
ByteArrayOutputStream baos = null;
try {
if (bitmap != null) {
baos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
baos.flush();
baos.close();

byte[] bitmapBytes = baos.toByteArray();
result = Base64.encodeToString(bitmapBytes, Base64.DEFAULT);
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (baos != null) {
baos.flush();
baos.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return result;
}
}

布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.imoocdict.MainActivity">
<ScrollView android:layout_width="match_parent"
android:layout_height="200dp">
<TextView
android:id="@+id/translate"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Hello World!"/>
</ScrollView>
<LinearLayout android:layout_width="match_parent"
android:layout_height="50dp"
android:orientation="horizontal">

<TextView
android:id="@+id/voice"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="语音"
/>
<EditText
android:id="@+id/input"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ems="10"
android:inputType="textPersonName"
android:text="words"/>
<Button
android:id="@+id/find"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="get查询"
/>
</LinearLayout>
<Button
android:id="@+id/syncgetbyurl"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="post查询"
/>
<Button
android:id="@+id/syncgetdrawableurl"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="加载网络图片"
/>
<Button
android:id="@+id/upload"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="上传图片"
/>
<ImageView
android:id="@+id/imageView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="@mipmap/ic_launcher"/>

</LinearLayout>