我使用
Android示例项目ContactsList(
http://developer.android.com/shareables/training/ContactsList.zip)作为示例在我的应用程序中开发联系人Activity.
它在所有Android版本上都运行良好,但在Android 4.4中没有加载联系人图像,我收到以下错误：
它在所有Android版本上都运行良好,但在Android 4.4中没有加载联系人图像,我收到以下错误：
NewFromFD Failed in nativeDecodeFileDescriptor
执行此方法时会发生这种情况：
BitmapFactory.decodeFileDescriptor(fileDescriptor,null,options);
它总是返回null.
private Bitmap loadContactPhotoThumbnail(String photoData,int imageSize) {
if (!isAdded() || getActivity() == null) {
return null;
}
AssetFileDescriptor afd = null;
try {
Uri thumbUri;
if (Utils.hasHoneycomb()) {
thumbUri = Uri.parse(photoData);
Log.d("imageloader",photoData);
} else {
final Uri contactUri = Uri.withAppendedpath(Contacts.CONTENT_URI,photoData);
thumbUri = Uri.withAppendedpath(contactUri,Photo.CONTENT_DIRECTORY);
}
afd = getActivity().getContentResolver().openAssetFileDescriptor(thumbUri,"r");
Log.d("imageloader",afd.toString());
FileDescriptor fileDescriptor = null;
try{
fileDescriptor = afd.getFileDescriptor();
Log.d("imageloader",fileDescriptor.toString());
} catch (NullPointerException e){
e.printstacktrace();
}
if (fileDescriptor != null) {
return ImageLoader.decodeSampledBitmapFromDescriptor(
fileDescriptor,imageSize,imageSize);
}
} catch (FileNotFoundException e) {
if (BuildConfig.DEBUG) {
Log.d(TAG,"Contact photo thumbnail not found for contact " + photoData
+ ": " + e.toString());
}
} finally {
if (afd != null) {
try {
afd.close();
} catch (IOException e) {
}
}
}
return null;
}
而photoData是Contacts.PHOTO_THUMBNAIL_URI取自ContactsContract.Contacts.CONTENT_URI.
12-09 21:15:04.683: D/ImageCache(12531): Memory cache created (size = 6554)
12-09 21:15:05.024: D/ImageLoader(12531): doInBackground - starting work
12-09 21:15:05.024: D/imageloader(12531): content://com.android.contacts/contacts/296/photo
12-09 21:15:05.034: D/imageloader(12531): {AssetFileDescriptor: {ParcelFileDescriptor: FileDescriptor[54]} start=0 len=-1}
12-09 21:15:05.034: D/imageloader(12531): FileDescriptor[54]
12-09 21:15:05.044: D/ImageLoader(12531): doInBackground - finished work
12-09 21:15:05.044: D/ImageLoader(12531): doInBackground - starting work
12-09 21:15:05.054: D/imageloader(12531): content://com.android.contacts/contacts/300/photo
12-09 21:15:05.064: D/imageloader(12531): {AssetFileDescriptor: {ParcelFileDescriptor: FileDescriptor[54]} start=0 len=-1}
12-09 21:15:05.064: D/imageloader(12531): FileDescriptor[54]
12-09 21:15:05.074: D/ImageLoader(12531): doInBackground - finished work
12-09 21:15:05.084: D/ImageLoader(12531): doInBackground - starting work
12-09 21:15:05.084: D/imageloader(12531): content://com.android.contacts/contacts/318/photo
12-09 21:15:05.114: D/imageloader(12531): {AssetFileDescriptor: {ParcelFileDescriptor: FileDescriptor[54]} start=0 len=-1}
12-09 21:15:05.114: D/imageloader(12531): FileDescriptor[54]
12-09 21:15:05.114: D/ImageLoader(12531): doInBackground - finished work
12-09 21:15:05.114: D/ImageLoader(12531): doInBackground - starting work
12-09 21:15:05.114: D/imageloader(12531): content://com.android.contacts/contacts/319/photo
12-09 21:15:05.124: D/imageloader(12531): {AssetFileDescriptor: {ParcelFileDescriptor: FileDescriptor[54]} start=0 len=-1}
12-09 21:15:05.124: D/imageloader(12531): FileDescriptor[54]
12-09 21:15:05.124: D/ImageLoader(12531): doInBackground - finished work
12-09 21:15:05.124: D/ImageLoader(12531): doInBackground - starting work
12-09 21:15:05.124: D/imageloader(12531): content://com.android.contacts/contacts/320/photo
12-09 21:15:05.144: D/imageloader(12531): {AssetFileDescriptor: {ParcelFileDescriptor: FileDescriptor[54]} start=0 len=-1}
12-09 21:15:05.144: D/imageloader(12531): FileDescriptor[54]
12-09 21:15:05.144: D/ImageLoader(12531): doInBackground - finished work
12-09 21:15:05.144: D/ImageLoader(12531): doInBackground - starting work
12-09 21:15:05.144: D/imageloader(12531): content://com.android.contacts/contacts/302/photo
12-09 21:15:05.154: D/imageloader(12531): {AssetFileDescriptor: {ParcelFileDescriptor: FileDescriptor[55]} start=0 len=-1}
12-09 21:15:05.154: D/imageloader(12531): FileDescriptor[55]
12-09 21:15:05.154: D/ImageLoader(12531): doInBackground - finished work
12-09 21:15:05.164: D/ImageLoader(12531): doInBackground - starting work
12-09 21:15:05.164: D/imageloader(12531): content://com.android.contacts/contacts/301/photo
12-09 21:15:05.164: D/imageloader(12531): {AssetFileDescriptor: {ParcelFileDescriptor: FileDescriptor[55]} start=0 len=-1}
12-09 21:15:05.164: D/imageloader(12531): FileDescriptor[55]
12-09 21:15:05.174: D/ImageLoader(12531): doInBackground - finished work
12-09 21:15:05.174: D/ImageLoader(12531): doInBackground - starting work
12-09 21:15:05.174: D/imageloader(12531): content://com.android.contacts/contacts/304/photo
12-09 21:15:05.184: D/imageloader(12531): {AssetFileDescriptor: {ParcelFileDescriptor: FileDescriptor[55]} start=0 len=-1}
12-09 21:15:05.184: D/imageloader(12531): FileDescriptor[55]
12-09 21:15:05.184: D/ImageLoader(12531): doInBackground - finished work
有人可以帮我解决这个问题吗？
解决方法
我有同样的问题,虽然我不知道是什么问题我找到了一个解决方案,适用于KitKat& JellyBean(4.2.2).您所要做的就是将文件作为InputStream而不是AssetFileDescriptor打开.我用过这段代码：
private Bitmap loadContactPhotoThumbnail(String photoData) {
InputStream is = null;
try {
Uri thumbUri;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
thumbUri = Uri.parse(photoData);
} else {
final Uri contactUri = Uri.withAppendedpath(
Contacts.CONTENT_URI,photoData);
thumbUri = Uri.withAppendedpath(contactUri,Contacts.Photo.CONTENT_DIRECTORY);
}
is = getContentResolver().openInputStream(thumbUri);
if (is != null) {
return BitmapFactory.decodeStream(is);
}
} catch (FileNotFoundException e) {
e.printstacktrace();
} finally {
if (is != null) {
try {
is.close();
} catch (IOException e) {
e.printstacktrace();
}
}
}
return null;
}
它与您在Display contact badge可以找到的代码相同,唯一的修改是它使用InputStream.
