问题
I'm using Android file selection and selecting files from app storage (images, videos, documents). I have an function "getPath" . Im getting path from uri. I have no problem with gallery images or download documents. But when i select a file from google drive i cant get path. This is the google drive uri "content://com.google.android.apps.docs.storage/document/acc%3D25%3Bdoc%3D12" Can you help me about it ?
This is also my "getPath" function.
public static String getPath(final Context context, final Uri uri) {
// check here to KITKAT or new version
final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
// DocumentProvider
if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
// ExternalStorageProvider
if (isExternalStorageDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
if ("primary".equalsIgnoreCase(type)) {
return Environment.getExternalStorageDirectory() + "/"
+ split[1];
}
}
// DownloadsProvider
else if (isDownloadsDocument(uri)) {
final String id = DocumentsContract.getDocumentId(uri);
final Uri contentUri = ContentUris.withAppendedId(
Uri.parse("content://downloads/public_downloads"),
Long.valueOf(id));
return getDataColumn(context, contentUri, null, null);
}
// MediaProvider
else if (isMediaDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];
Uri contentUri = null;
if ("image".equals(type)) {
contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
} else if ("video".equals(type)) {
contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
} else if ("audio".equals(type)) {
contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
}
final String selection = "_id=?";
final String[] selectionArgs = new String[] { split[1] };
return getDataColumn(context, contentUri, selection,
selectionArgs);
}
else if(isGoogleDriveUri(uri)){
//Get google drive path here
}
}
// MediaStore (and general)
else if ("content".equalsIgnoreCase(uri.getScheme())) {
// Return the remote address
if (isGooglePhotosUri(uri))
return uri.getLastPathSegment();
return getDataColumn(context, uri, null, null);
}
// File
else if ("file".equalsIgnoreCase(uri.getScheme())) {
return uri.getPath();
}
return nopath;
}
public static String iStreamToString(InputStream is1)
{
BufferedReader rd = new BufferedReader(new InputStreamReader(is1), 4096);
String line;
StringBuilder sb = new StringBuilder();
try {
while ((line = rd.readLine()) != null) {
sb.append(line);
}
rd.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
String contentOfMyInputStream = sb.toString();
return contentOfMyInputStream;
}
回答1:
I have no problem with gallery images or download documents
You will, on many devices.
But when i select a file from google drive i cant get path
There is no path. ACTION_GET_CONTENT does not allow the user to choose a file. It allows the user to choose a piece of content. That content might be a local file. That content might also be:
- Something on a file server on the network
- Something in a cloud storage service, such as Google Drive, and therefore is not on the device at the moment
- Something in an encrypted volume
- Something that is a file, but is not a file that you can access directly, such as from internal storage of another app
- And so on
You have two main options. If you only want files, then use a third-party file chooser library to replace all of the code in your question.
Or, if you still want to use ACTION_GET_CONTENT or ACTION_OPEN_DOCUMENT, you can take the Uri that you get from data.getData() in onActivityResult() and do two things with it:
First, use
DocumentFile.fromSingleUri()to get aDocumentFileobject pointing to thatUri. You can callgetName()on theDocumentFileto get a "display name" for the content, which should be something that the user will recognize.Then, use a
ContentResolverandopenInputStream()to get at the content itself, similar to how you might use aFileInputStreamto get at the bytes in a file.
回答2:
I was also stuck with the same issue and found that when we choose image from google drive its uri is like below
com.google.android.apps.docs.storage
and we cant directly get the path of file as it is not in our device. So we first download the file to a certain destination and then we can use that path to do our work. Below is the code for the same
FileOutputStream fos = null;
try {
fos = new FileOutputStream(getDestinationFilePath());
try (BufferedOutputStream out = new BufferedOutputStream(fos);
InputStream in = mContext.getContentResolver().openInputStream(uri))
{
byte[] buffer = new byte[8192];
int len = 0;
while ((len = in.read(buffer)) >= 0) {
out.write(buffer, 0, len);
}
out.flush();
} finally {
fos.getFD().sync();
}
} catch (Exception e) {
e.printStackTrace();
}
}
File file = new File(destinationFilePath);
if (Integer.parseInt(String.valueOf(file.length() / 1024)) > 1024) {
InputStream imageStream = null;
try {
imageStream = mContext.getContentResolver().openInputStream(uri);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
now your file is saved at the desired destination path and you can use it.
回答3:
Get file path from Google Drive we can easily access by Using File Provider by using following steps Code is working fine.
1) Add provider path in AndroidManifest file inside Applcation Tag.
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name="com.satya.filemangerdemo.activity.MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="${applicationId}.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/provider_paths"/>
</provider>
</application>
2) provider_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<cache-path
name="my_cache"
path="." />
<cache-path
name="cache"
path="." />
<external-cache-path
name="external_cache"
path="." />
<files-path
name="files"
path="." />
</paths>
3)FileUtils.java
public class FileUtils {
private static Uri contentUri = null;
@SuppressLint("NewApi")
public static String getPath(final Context context, final Uri uri) {
// check here to KITKAT or new version
final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
// DocumentProvider
if (isKitKat && DocumentsContract.isDocumentUri(context, uri))
{
/ MediaProvider
if (isMediaDocument(uri)) {
if (isGoogleDriveUri(uri)) {
return getDriveFilePath(uri, context);
}
}
}
4) isGoogleDriveUri method
private static boolean isGoogleDriveUri(Uri uri) {
return "com.google.android.apps.docs.storage".equals(uri.getAuthority()) || "com.google.android.apps.docs.storage.legacy".equals(uri.getAuthority());
}
5)getDriveFilePath method
private static String getDriveFilePath(Uri uri, Context context) {
Uri returnUri = uri;
Cursor returnCursor = context.getContentResolver().query(returnUri, null, null, null, null);
/*
* Get the column indexes of the data in the Cursor,
* * move to the first row in the Cursor, get the data,
* * and display it.
* */
int nameIndex = returnCursor.getColumnIndex(OpenableColumns.DISPLAY_NAME);
int sizeIndex = returnCursor.getColumnIndex(OpenableColumns.SIZE);
returnCursor.moveToFirst();
String name = (returnCursor.getString(nameIndex));
String size = (Long.toString(returnCursor.getLong(sizeIndex)));
File file = new File(context.getCacheDir(), name);
try {
InputStream inputStream = context.getContentResolver().openInputStream(uri);
FileOutputStream outputStream = new FileOutputStream(file);
int read = 0;
int maxBufferSize = 1 * 1024 * 1024;
int bytesAvailable = inputStream.available();
//int bufferSize = 1024;
int bufferSize = Math.min(bytesAvailable, maxBufferSize);
final byte[] buffers = new byte[bufferSize];
while ((read = inputStream.read(buffers)) != -1) {
outputStream.write(buffers, 0, read);
}
Log.e("File Size", "Size " + file.length());
inputStream.close();
outputStream.close();
Log.e("File Path", "Path " + file.getPath());
Log.e("File Size", "Size " + file.length());
} catch (Exception e) {
Log.e("Exception", e.getMessage());
}
return file.getPath();
}
来源：https://stackoverflow.com/questions/47633020/get-path-from-google-drive-uri