使用okhttp进行图片下载，上传，get,post网络请求
来源：互联网 发布：莫知我哀 莫的意思 编辑：程序博客网 时间：2024/05/18 02:30
github源码地址：
https://github.com/AndroidDerek/IMoocDict
效果：
1连接网络：
2断开网络
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>
。。。
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