Retrofit學(xué)習(xí)(四)-下載文件
Retrofit學(xué)習(xí)(一)-集成
http://www.lxweimin.com/p/86e5cddcc753
Retrofit學(xué)習(xí)(二)-get請求
http://www.lxweimin.com/p/cdde02a0777c
Retrofit學(xué)習(xí)(三)-普通post請求
http://www.lxweimin.com/p/7f252d10fd41
Retrofit學(xué)習(xí)(四)-下載文件
http://www.lxweimin.com/p/f61645a770ae
Retrofit學(xué)習(xí)(五)-文件上傳
http://www.lxweimin.com/p/ca0cb8640c8f
@Streaming:用于下載大文件
@Streaming //大文件時要加不然會OOM
@GET
Call<ResponseBody> downloadFile(@Url String fileUrl);
實現(xiàn)
private void startDownload() {
//http://surl.qq.com/195D0D?qbsrc=51&asr=4286
String downloadUrl = "195D0D?qbsrc=51&asr=4286";
//
Retrofit retrofit = new Retrofit.Builder()
.baseUrl("http://surl.qq.com/")
.addConverterFactory(ScalarsConverterFactory.create())
.addConverterFactory(GsonConverterFactory.create())
.build();
DownloadService downloadService = retrofit.create(DownloadService.class);
Call<ResponseBody> responseBodyCall = downloadService.downloadFile(downloadUrl);
responseBodyCall.enqueue(new Callback<ResponseBody>() {
@Override
public void onResponse(Call<ResponseBody> call, final Response<ResponseBody> response) {
L.d("vivi",response.message()+" length "+response.body().contentLength()+" type "+response.body().contentType());
//建立一個文件
final File file = FileUtils.createFile(DownLoadActivity.this);
//下載文件放在子線程
new Thread(){
@Override
public void run() {
super.run();
//保存到本地
FileUtils.writeFile2Disk(response, file, new HttpCallBack() {
@Override
public void onLoading(final long current, final long total) {
/**
* 更新進度條
*/
runOnUiThread(new Runnable() {
@Override
public void run() {
L.d("vivi",current+" to "+total);
L.d("vivi"," runOnUiThread "+ currentThread().getName());
mTv.setText(current+"");
mPb.setMax((int) total);
mPb.setProgress((int) current);
}
});
}
});
}
}.start();
}
@Override
public void onFailure(Call<ResponseBody> call, Throwable t) {
t.printStackTrace();
L.d("vivi",t.getMessage()+" "+t.toString());
}
});
}
工具類
package com.liu.retrofitdemo2.util;
import android.content.Context;
import android.os.Environment;
import com.liu.retrofitdemo2.callback.HttpCallBack;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import okhttp3.ResponseBody;
import retrofit2.Response;
/**
* @Description: 描述
* @AUTHOR 劉楠 Create By 2016/10/27 0027 15:56
*/
public class FileUtils {
public static File createFile(Context context){
File file=null;
String state = Environment.getExternalStorageState();
if(state.equals(Environment.MEDIA_MOUNTED)){
file = new File(Environment.getExternalStorageDirectory().getAbsolutePath()+"/test.apk");
}else {
file = new File(context.getCacheDir().getAbsolutePath()+"/test.apk");
}
L.d("vivi","file "+file.getAbsolutePath());
return file;
}
public static void writeFile2Disk(Response<ResponseBody> response, File file, HttpCallBack httpCallBack){
long currentLength = 0;
OutputStream os =null;
InputStream is = response.body().byteStream();
long totalLength =response.body().contentLength();
try {
os = new FileOutputStream(file);
int len ;
byte [] buff = new byte[1024];
while((len=is.read(buff))!=-1){
os.write(buff,0,len);
currentLength+=len;
L.d("vivi","當(dāng)前進度:"+currentLength);
httpCallBack.onLoading(currentLength,totalLength);
}
// httpCallBack.onLoading(currentLength,totalLength,true);
} catch(FileNotFoundException e) {
e.printStackTrace();
} catch(IOException e) {
e.printStackTrace();
} finally {
if(os!=null){
try {
os.close();
} catch(IOException e) {
e.printStackTrace();
}
}
if(is!=null){
try {
is.close();
} catch(IOException e) {
e.printStackTrace();
}
}
}
}
}
