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[英]Android file chooser is not opening from WebView in Lollipop nor Marshmallow
[英]Opening image from photos lollipop Android
我正在嘗試打開圖片以在我的應用中顯示。 最初,該代碼可用於具有以下代碼的任何本地文件:
...
if ("content".equalsIgnoreCase(uri.getScheme())) {
return getDataColumn(context, uri, null, null);
...
public static String getDataColumn(Context context, Uri uri, String selection,
String[] selectionArgs) {
Cursor cursor = null;
final String column = "_data";
final String[] projection = {
column
};
try {
cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,
null);
if (cursor != null && cursor.moveToFirst()) {
final int column_index = cursor.getColumnIndexOrThrow(column);
return cursor.getString(column_index);
}
} finally {
if (cursor != null)
cursor.close();
}
return null;
}
但是,當我從上載的照片廚房中使用棒棒糖打開圖像時,該圖像似乎已下載,但是“ _data”返回null,因此無法在應用程序中找到要打開的本地地址。
我的問題:如何打開從廚房下載的圖像?
我已經閱讀了很多有關isMediaDocument和isDownloadedDocument的信息,但是所有圖像均返回false。
import android.annotation.TargetApi;
import android.content.ContentUris;
import android.content.Context;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.os.ParcelFileDescriptor;
import android.provider.DocumentsContract;
import android.provider.MediaStore;
import android.util.Log;
import java.io.File;
import java.io.FileDescriptor;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
/**
* Created by HP-HP on 09-08-2015.
*/
public class ImagePathUtils {
/**
* Get a file path from a Uri. This will get the the path for Storage Access
* Framework Documents, as well as the _data field for the MediaStore and
* other file-based ContentProviders.
*
* @param context The context.
* @param uri The Uri to query.
* @author paulburke
*/
@TargetApi(Build.VERSION_CODES.KITKAT)
public static String getPath(final Context context, final Uri uri) {
final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
// Google Drive Uri
if(isGoogleDriveUri(uri))
{
ParcelFileDescriptor parcelFileDescriptor;
try {
parcelFileDescriptor = context.getContentResolver().openFileDescriptor(uri, "r");
FileDescriptor fileDescriptor = parcelFileDescriptor.getFileDescriptor();
BitmapFactory.Options bmOptions = new BitmapFactory.Options();
bmOptions.inJustDecodeBounds = true;
bmOptions.inSampleSize = 1;
bmOptions.inJustDecodeBounds = false;
bmOptions.inDither = false;
bmOptions.inPurgeable = true;
bmOptions.inInputShareable = true;
Bitmap image = BitmapFactory.decodeFileDescriptor(fileDescriptor,null,bmOptions);
parcelFileDescriptor.close();
return storeGoogleDriveImage(context,image).getPath();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
// 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];
}
// TODO handle non-primary volumes
}
// 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);
}
}
// 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 null;
}
/**
* Get the value of the data column for this Uri. This is useful for
* MediaStore Uris, and other file-based ContentProviders.
*
* @param context The context.
* @param uri The Uri to query.
* @param selection (Optional) Filter used in the query.
* @param selectionArgs (Optional) Selection arguments used in the query.
* @return The value of the _data column, which is typically a file path.
*/
public static String getDataColumn(Context context, Uri uri, String selection,
String[] selectionArgs) {
Cursor cursor = null;
final String column = "_data";
final String[] projection = {MediaStore.Images.Media.DATA};
try {
cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,
null);
if (cursor != null && cursor.moveToFirst()) {
final int index = cursor.getColumnIndexOrThrow(column);
return cursor.getString(index);
}
} finally {
if (cursor != null)
cursor.close();
}
return null;
}
public static Uri storeGoogleDriveImage(Context context, Bitmap bitmap)
{
File pictureFile = ImageUtils.getOutputMediaFile(context,"share");
if (pictureFile == null) {
Log.d("","Error creating media file, check storage permissions: ");// e.getMessage());
}
try {
FileOutputStream fos = new FileOutputStream(pictureFile);
bitmap.compress(Bitmap.CompressFormat.PNG, 80, fos);
fos.flush();
fos.close();
} catch (FileNotFoundException e) {
Log.d("", "File not found: " + e.getMessage());
} catch (IOException e) {
Log.d("", "Error accessing file: " + e.getMessage());
}
return Uri.parse("file://" + pictureFile.getAbsolutePath());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is ExternalStorageProvider.
*/
public static boolean isExternalStorageDocument(Uri uri) {
return "com.android.externalstorage.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is DownloadsProvider.
*/
public static boolean isDownloadsDocument(Uri uri) {
return "com.android.providers.downloads.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is MediaProvider.
*/
public static boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is Google Photos.
*/
public static boolean isGooglePhotosUri(Uri uri) {
return "com.google.android.apps.photos.content".equals(uri.getAuthority());
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is GoogleDrive.
*/
public static boolean isGoogleDriveUri(Uri uri) {
//com.google.android.apps.docs.storage.legacy from google drive share to bakar
//com.google.android.apps.docs.storage from bakar publish activity to google drive
return "com.google.android.apps.docs.storage.legacy".equals(uri.getAuthority()) || "com.google.android.apps.docs.storage".equals(uri.getAuthority());
}
}
如何打開從廚房下載的圖像?
這取決於“打開圖像”的含義。
如果您的目標是在ImageView
或某些類似的小部件中顯示圖像,請使用任何可用的Android圖像加載庫 ,例如Picasso或Universal Image Loader。 他們將在后台線程,緩存等上為您完成這項工作。
如果需要直接處理圖像,請在ContentResolver
上使用openInputStream()
,將Uri
傳遞給圖像,以在其上獲取InputStream
。
public String getPath(Uri uri) {
String[] projection = {MediaStore.Images.Media.DATA};
Cursor cursor = managedQuery(uri, projection, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
如果不行。 我認為您打開google +驅動器照片庫,而不是手機存儲庫。 我過去使用棒棒糖也有同樣的問題。 我改變了打電話給畫廊的意圖,並且可以正常工作
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