从Google驱动器下载选定的文件 [英] Download selected file from Google drive
问题描述
我有选定文件的驱动器ID,并且可以使用
I have Drive Id of selected file and I am able to get Url of that file using
MetadataResult mdRslt;
DriveFile file;
file = Drive.DriveApi.getFile(mGoogleApiClient,driveId);
mdRslt = file.getMetadata(mGoogleApiClient).await();
if (mdRslt != null && mdRslt.getStatus().isSuccess()) {
link = mdRslt.getMetadata().getWebContentLink();
if(link==null){
link = mdRslt.getMetadata().getAlternateLink();
Log.e("LINK","FILE URL After Null: "+ link);
}
Log.e("LINK","FILE URL : "+ link);
}
如何从网址下载文件并保存到SD卡?请帮助我解决这个问题。
Thanks。
How to download file from url and save in to SD card? Please help me regarding this. Thanks.
推荐答案
更新:
其实,你把它写入文件,你不需要'is2Bytes()'。只需将输入流(cont.getInputStream())直接转储到文件即可。
UPDATE:
Actually, since you writing it to a file, you don't need the 'is2Bytes()'. Just dump the input stream (cont.getInputStream()) directly to a file.
原始答案:
自您指的是 GDAA ,此方法(取自这里)可能适合你:
ORIGINAL ANSWER:
Since you are referring to the GDAA, this method (taken from here) may just work for you:
GoogleApiClient mGAC;
byte[] read(DriveId id) {
byte[] buf = null;
if (mGAC != null && mGAC.isConnected() && id != null) try {
DriveFile df = Drive.DriveApi.getFile(mGAC, id);
DriveContentsResult rslt = df.open(mGAC, DriveFile.MODE_READ_ONLY, null).await();
if ((rslt != null) && rslt.getStatus().isSuccess()) {
DriveContents cont = rslt.getDriveContents();
buf = is2Bytes(cont.getInputStream());
cont.discard(mGAC); // or cont.commit(); they are equiv if READONLY
}
} catch (Exception e) { Log.e("_", Log.getStackTraceString(e)); }
return buf;
}
byte[] is2Bytes(InputStream is) {
byte[] buf = null;
BufferedInputStream bufIS = null;
if (is != null) try {
ByteArrayOutputStream byteBuffer = new ByteArrayOutputStream();
bufIS = new BufferedInputStream(is);
buf = new byte[4096];
int cnt;
while ((cnt = bufIS.read(buf)) >= 0) {
byteBuffer.write(buf, 0, cnt);
}
buf = byteBuffer.size() > 0 ? byteBuffer.toByteArray() : null;
} catch (Exception ignore) {}
finally {
try {
if (bufIS != null) bufIS.close();
} catch (Exception ignore) {}
}
return buf;
}
这是'await'风格的简化版本, UI线程。此外,将输入流转储到缓冲区是可选的,我不知道您的
应用程序的需求是什么。
It is a simplified version of 'await' flavor that has be run off-UI-thread. Also, dumping input stream into a buffer is optional, I don't know what your app's needs are.
好运。
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