Android_Okhttp上传与下载文件
一:使用okhttp下载与上传文件
依赖
compile 'com.squareup.okhttp3:okhttp:3.9.1'
compile 'com.google.code.gson:gson:2.8.1' 二:MainActivity代码
package com.example.view;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import com.example.R;
import com.example.bean.MsgBean;
import com.example.presenter.Presenter;
import java.io.File;
import java.util.HashMap;
import java.util.Map;
public class MainActivity extends AppCompatActivity implements View.OnClickListener,IView{
private Button uploadfile;
private Button downloadfile;
private Presenter presenter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//获取id
uploadfile = (Button)findViewById(R.id.uploadFile);
downloadfile = (Button)findViewById(R.id.downloadFile);
//点击监听
uploadfile.setOnClickListener(this);
downloadfile.setOnClickListener(this);
//创建presenter层
presenter = new Presenter(this);
}
@Override
public void onClick(View view) {
switch (view.getId()){
case R.id.uploadFile :
//要上传的图片路径
File file = new File(Environment.getExternalStorageDirectory().getPath()+"/123.jpg");
if(file.exists()){//判断是否有此文件
Map map = new HashMap<>();
map.put("uid", "1653");
map.put("file",file);
presenter.uploadFile("http://120.27.23.105/file/upload",map);
}else{
Toast.makeText(this,"文件不存在",Toast.LENGTH_SHORT).show();
}
break;
case R.id.downloadFile :
//http://g.hiphotos.baidu.com/image/pic/item/908fa0ec08fa513d08b6a0ab376d55fbb2fbd9a3.jpg 图片地址
//设置下载的地址
String sdcardPath = Environment.getExternalStorageDirectory().getPath()+"/123.jpg";
File file2 = new File(sdcardPath);
presenter.downloadFile(file2,"http://g.hiphotos.baidu.com/image/pic/item/908fa0ec08fa513d08b6a0ab376d55fbb2fbd9a3.jpg");
break;
}
}
@Override
public void onSuccess(Object o,int tag) {
if(tag==1){
MsgBean msg = (MsgBean) o;
Toast.makeText(this,msg.getMsg(),Toast.LENGTH_SHORT).show();
}else{
//吐司文件下载路径
Toast.makeText(this,o+"",Toast.LENGTH_SHORT).show();
}
}
@Override
public void onFailed(Exception e,int tag) {
Toast.makeText(this,e.getMessage(),Toast.LENGTH_SHORT).show();
}
@Override
protected void onDestroy() {
super.onDestroy();
if(presenter!=null){
presenter.detatch();
}
}
}
三:Presenter
public class Presenter{
private IView iv;
public Presenter(IView iv) {
this.iv = iv;
}
public void uploadFile(String url, Map paramsMap) {
OkHttpUtils.getInstance().uploadFile(url, paramsMap, new CallBack() {
@Override
public void onSuccess(Object o) {
iv.onSuccess(o,1);
}
@Override
public void onFailed(Exception e) {
iv.onFailed(e,1);
}
});
}
public void downloadFile(File file,String url) {
OkHttpUtils.getInstance().downloadFile(file , url , new CallBack() {
@Override
public void onSuccess(Object o) {
iv.onSuccess(o,2);
}
@Override
public void onFailed(Exception e) {
iv.onFailed(e,2);
}
});
}
//防止内存泄漏
public void detatch(){
if (iv != null) {
iv = null;
}
}
}
四:接口
public interface CallBack {
void onSuccess(Object o);
void onFailed(Exception e);
}public interface CallBackPro {
void onSuccess(Object o);
void onFailed(Exception e);
void onProgressBar(Long i);//用来显示下载进度
}五:Okhttp封装上传下载 presenter调用
package com.example.net;
import android.os.Handler;
import com.example.bean.MsgBean;
import com.example.presenter.CallBack;
import com.example.presenter.CallBackPro;
import com.google.gson.Gson;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.MediaType;
import okhttp3.MultipartBody;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
import okhttp3.ResponseBody;
/**
* Created by Administrator on 2017/12/25 0025.
*/
public class OkHttpUtils {
public static volatile OkHttpUtils instance;
Handler handler = new Handler();
private OkHttpUtils() {
}
public static OkHttpUtils getInstance() {
if (instance == null) {
synchronized (OkHttpUtils.class) {
if (instance == null) {
instance = new OkHttpUtils();
}
}
}
return instance;
}
public void uploadFile(String url, Map paramsMap, final CallBack callBack) {
MultipartBody.Builder multipartBody = new MultipartBody.Builder();
//form 表单上传
multipartBody.setType(MultipartBody.FORM);
//拼接参数
for (String key : paramsMap.keySet()) {
Object object = paramsMap.get(key);
if(object instanceof String){
multipartBody.addFormDataPart(key,object.toString());
}else if(object instanceof File){
File file = (File) object;
multipartBody.addFormDataPart(key,file.getName(),MultipartBody.create(MediaType.parse("multipart/form-data"),file));
}
}
RequestBody requestBody=multipartBody.build();
//创建Request对象
Request request=new Request.Builder().url(url).post(requestBody).build();
new OkHttpClient.Builder()
//设置最长读写时间
.readTimeout(100000, TimeUnit.SECONDS)
.writeTimeout(100000, TimeUnit.SECONDS)
.connectTimeout(100000, TimeUnit.SECONDS).build()
.newCall(request)
.enqueue(new Callback() {
@Override
public void onFailure(Call call, final IOException e) {
handler.post(new Runnable() {
@Override
public void run() {
callBack.onSuccess(e.getMessage());
}
});
}
@Override
public void onResponse(Call call, final Response response) throws IOException {
final String str = response.body().string();
//解析
final MsgBean msgBean = new Gson().fromJson(str, MsgBean.class);
handler.post(new Runnable() {
@Override
public void run() {
callBack.onSuccess(msgBean);
}
});
}
});
}
public void downloadFile(final File file, String url, final CallBackPro callBack) {
// 父目录是否存在
File parent = file.getParentFile();
if (!parent.exists()) {
parent.mkdir();
}
// 文件是否存在
if (!file.exists()) {
try {
file.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
}
Request request=new Request.Builder().url(url).get().build();
new OkHttpClient.Builder()
.readTimeout(100000, TimeUnit.SECONDS)
.writeTimeout(100000, TimeUnit.SECONDS)
.connectTimeout(100000, TimeUnit.SECONDS).build()
.newCall(request)
.enqueue(new Callback() {
@Override
public void onFailure(Call call, final IOException e) {
handler.post(new Runnable() {
@Override
public void run() {
callBack.onFailed(e);
}
});
}
@Override
public void onResponse(Call call, Response response) throws IOException {
if (response.isSuccessful()) {
ResponseBody body = response.body();
// 获取文件总长度
final long totalLength = body.contentLength();
//以流的方式进行读取
InputStream inputStream = body.byteStream();
FileOutputStream outputStream = new FileOutputStream(file);
byte[] buffer = new byte[2048];
int len = 0;
int num = 0;
while ((len = inputStream.read(buffer)) != -1){
num+=len;
outputStream.write(buffer,0,len);
final int finalNum = num;
handler.post(new Runnable() {
@Override
public void run() {
callBack.onProgressBar( finalNum *100/totalLength);
}
});
}
//读取完关闭流
outputStream.flush();
outputStream.close();
inputStream.close();
handler.post(new Runnable() {
@Override
public void run() {
if(file.exists()){
//返回下载文件路径
callBack.onSuccess(file.getPath());
}
}
});
}
}
});
}
//get请求
public void get(String url, Map map, final CallBack callBack, final Class c){
//对url和参数做拼接处理
StringBuffer stringBuffer = new StringBuffer();
stringBuffer.append(url);
//判断是否存在? if中是存在
if(stringBuffer.indexOf("?")!=-1 ){
//判断?是否在最后一位 if中是不在最后一位
if(stringBuffer.indexOf("?")!=stringBuffer.length()-1){
stringBuffer.append("&");
}
}else{
stringBuffer.append("?");
}
for(Map.Entry entry:map.entrySet()){
stringBuffer.append(entry.getKey())
.append("=")
.append(entry.getValue())
.append("&");
}
//判断是否存在& if中是存在
if(stringBuffer.indexOf("&")!=-1){
stringBuffer.deleteCharAt(stringBuffer.lastIndexOf("&"));
}
//1:创建OkHttpClient对象
OkHttpClient okHttpClient = new OkHttpClient();
//2:创建Request对象
final Request request = new Request.Builder()
.get()
.url(stringBuffer.toString())
.build();
//3:创建Call对象
Call call = okHttpClient.newCall(request);
//4:请求网络
call.enqueue(new Callback() {
//请求失败
@Override
public void onFailure(Call call, final IOException e) {
handler.post(new Runnable() {
@Override
public void run() {
callBack.onFailed(e);
}
});
}
//请求成功
@Override
public void onResponse(Call call, Response response) throws IOException {
String result = response.body().string();
//拿到数据解析
final Object o = new Gson().fromJson(result, c);
//当前是在子线程,回到主线程中
handler.post(new Runnable() {
@Override
public void run() {
//回调
callBack.onSuccess(o);
}
});
}
});
}
}