下载文件或视频，下载完成后自动打开
Posted mo_weifeng
tags:
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遵循以下流程
1、加权限
<!-- 在sdcard中创建/删除文件的权限 -->
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
2、添加FileProvider（打开文件用）
<provider
android:name="androidx.core.content.FileProvider"
android:authorities="$applicationId.fileProvider2"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/filepaths" />
</provider>
filepaths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<paths>
<external-path path="." name="jiuxing" />
</paths>
</paths>
3、先创建文件夹，下载用
视频放在Picture，文件放在Download
public static String getSystemVideoFolder(Context context, String folderName)
String folder = getSystemVideoDir(context)
+ File.separator + folderName;
LogUtils.i("folder=" + folder);
File folderFile = new File(folder);
if (!folderFile.exists())
boolean isSuccess = folderFile.mkdirs();
LogUtils.i("创建文件夹路径是否成功=" + isSuccess);
return folder;
public static String getSystemVideoDir(Context context)
File folder = Environment.getExternalStoragePublicDirectory(DIRECTORY_PICTURES);
return folder.getAbsolutePath();
public static String getSystemFileFolder(Context context, String folderName)
String folder = getSystemFileDir(context)
+ File.separator + folderName;
LogUtils.i("folder=" + folder);
File folderFile = new File(folder);
if (!folderFile.exists())
boolean isSuccess = folderFile.mkdirs();
LogUtils.i("创建文件夹路径是否成功=" + isSuccess);
return folder;
public static String getSystemFileDir(Context context)
File folder = Environment.getExternalStoragePublicDirectory(DIRECTORY_DOWNLOADS);
return folder.getAbsolutePath();
现在就可以得到下载的目录了
String dir = FolderUtil.getSystemVideoFolder(getContext(), "jiuxing");
String dir = FolderUtil.getSystemFileFolder(getContext(), "jiuxing");
4、下载类
DownloadManager
package com.zues.module_network.util;
import android.text.TextUtils;
import android.util.Log;
import androidx.annotation.NonNull;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
/**
* Created by heavyrainlee on 20/02/2018.
*/
public class DownloadManager
private final String TAG = getClass().getSimpleName();
private static DownloadManager downloadManager;
private final OkHttpClient okHttpClient;
public static DownloadManager get()
if (downloadManager == null)
downloadManager = new DownloadManager();
return downloadManager;
private DownloadManager()
okHttpClient = new OkHttpClient();
public void download(final String url, final String saveDir, final OnDownloadListener listener)
download(url, saveDir, listener);
public void download(final String url, final String saveDir, String name, final OnDownloadListener listener)
Request request = new Request.Builder().url(url).build();
okHttpClient.newCall(request).enqueue(new Callback()
@Override
public void onFailure(Call call, IOException e)
// 下载失败
listener.onFail();
@Override
public void onResponse(Call call, Response response) throws IOException
InputStream is = null;
FileOutputStream fos = null;
try
byte[] buf = new byte[2048];
int len = 0;
// 储存下载文件的目录
String savePath = isExistDir(saveDir);
String fileName = TextUtils.isEmpty(name) ? getNameFromUrl(url) : name;
is = response.body().byteStream();
long total = response.body().contentLength();
File file = new File(savePath, fileName);
fos = new FileOutputStream(file);
long sum = 0;
while ((len = is.read(buf)) != -1)
fos.write(buf, 0, len);
sum += len;
int progress = (int) (sum * 1.0f / total * 100);
// 下载中
listener.onProgress(progress);
fos.flush();
// 下载完成
listener.onSuccess(file);
catch (Exception e)
Log.i(TAG, "onResponse: ");
listener.onFail();
finally
try
if (is != null)
is.close();
catch (IOException e)
try
if (fos != null)
fos.close();
catch (IOException e)
);
/**
* @param saveDir
* @return
* @throws IOException 判断下载目录是否存在
*/
private String isExistDir(String saveDir) throws IOException
// 下载位置
File downloadFile = new File(saveDir);
if (!downloadFile.mkdirs())
downloadFile.createNewFile();
return downloadFile.getAbsolutePath();
/**
* @param url
* @return 从下载连接中解析出文件名
*/
@NonNull
private String getNameFromUrl(String url)
return url.substring(url.lastIndexOf("/") + 1);
public interface OnDownloadListener
/**
* 下载成功
*/
void onSuccess(File file);
/**
* @param progress 下载进度
*/
void onProgress(int progress);
/**
* 下载失败
*/
void onFail();
5、下载完直接打开文件，通知图库更新
private void downloadVideo(String url, String name)
String dir = FolderUtil.getSystemVideoFolder(getContext(), "jiuxing");
CustomDialogUtils.showPosDialog2(getContext(), null, "请下载后观看", "取消", "立即下载", new View.OnClickListener()
@Override
public void onClick(View view)
showDialog("正在下载");
DownloadManager.get().download(url, dir, name, new DownloadManager.OnDownloadListener()
@Override
public void onSuccess(File file)
dismissDialog();
// showToast("视频已下载：" + dir + "/" + name);
// 通知图库更新
getContext().sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE,
Uri.fromFile(new File(file.getPath()))));
//传递的数据
Bundle bundle = new Bundle();
bundle.putString("file", file.getAbsolutePath());
//发送数据
Message message = Message.obtain();
message.setData(bundle); //message.obj=bundle 传值也行
mVideoHandler.sendMessage(message);
// 打开文件
// FileOpenUtil.openFile(getContext(), file);
LogUtils.e("文件已下载：" + dir + "/" + name);
@Override
public void onProgress(int progress)
LogUtils.e("progress=" + progress);
@Override
public void onFail()
dismissDialog();
showToast("视频下载失败，请刷新后重试");
);
, null);
private void downloadFile(String url, String name)
String dir = FolderUtil.getSystemFileFolder(getContext(), "jiuxing");
CustomDialogUtils.showPosDialog2(getContext(), null, "请下载后查看", "取消", "立即下载", new View.OnClickListener()
@Override
public void onClick(View view)
showDialog("正在下载");
DownloadManager.get().download(url, dir, name, new DownloadManager.OnDownloadListener()
@Override
public void onSuccess(File file)
dismissDialog();
// showToast("文件已下载：" + dir + "/" + name);
//传递的数据
Bundle bundle = new Bundle();
bundle.putString("file", file.getAbsolutePath());
//发送数据
Message message = Message.obtain();
message.setData(bundle); //message.obj=bundle 传值也行
mFileHandler.sendMessage(message);
//打开文件
// FileOpenUtil.openFile(getContext(), file);
LogUtils.e("文件已下载：" + dir + "/" + name);
@Override
public void onProgress(int progress)
LogUtils.e("progress=" + progress);
@Override
public void onFail()
dismissDialog();
showToast("文件下载失败，请刷新后重试");
);
, null);
Handler mVideoHandler = new Handler()
@Override
public void handleMessage(Message msg)
super.handleMessage(msg);
Bundle bundle = msg.getData();
String url = bundle.getString("file");
//打开文件
FileOpenUtil.openFile(getContext(), new File(url));
;
Handler mFileHandler = new Handler()
@Override
public void handleMessage(Message msg)
super.handleMessage(msg);
Bundle bundle = msg.getData();
String url = bundle.getString("file");
//打开文件
FileOpenUtil.openFile(getContext(), new File(url));
;
6、打开文件工具
FileOpenUtil
package com.zues.module_base.base_util;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.webkit.MimeTypeMap;
import android.widget.视频文件中嵌入URL地址是怎么回事？可以去掉吗？