Android将图片存储并分享,android – 使用FileProvider从内部存储共享图像
我有一些文件存储在我的应用程序的内部存储器中,我想在外部应用程序中打开(例如,将图像发送到图库以供查看).我已经设置了一个FileProvider来执行此操作.
来自AndroidManifest.xml：
...
android:name="android.support.v4.content.FileProvider"
android:authorities="${packageName}"
android:exported="false"
android:grantUriPermissions="true">
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/files"/>
从res / xml / files.xml：
从我尝试打开文件的片段：
File sharedFolderPath = new File(getActivity().getFilesDir(), "shared");
File toOpen = new File(sharedFolderPath.getAbsolutePath(), sharedFile.getFileName());
if (toOpen.exists()) {
Log.w("File exists: " + toOpen.getAbsolutePath());
Uri fileUri = FileProvider.getUriForFile(getActivity(), BuildConfig.PACKAGE_NAME, toOpen);
Log.w("Attempting to attach file " + fileUri.getEncodedPath() + " with mime type: " + URLConnection.guessContentTypeFromName(fileUri.toString()));
Intent viewFile = new Intent(Intent.ACTION_VIEW);
viewFile.setData(fileUri);
viewFile.setType(URLConnection.guessContentTypeFromName(fileUri.toString()));
viewFile.putExtra(Intent.EXTRA_STREAM, fileUri);
viewFile.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
viewFile.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
try {
startActivity(viewFile);
} catch (android.content.ActivityNotFoundException ex) {
Toast.makeText(getActivity(), "Please install an appropriate application to open this file.", Toast.LENGTH_SHORT).show();
}
} else {
log.w("File does not exist: " + toOpen.getAbsolutePath());
Toast.makeText(getActivity(), "file not found.", Toast.LENGTH_SHORT).show();
}
从logcat输出(共享到Gallery应用程序)：
PACKAGE_NAME W/TAG: File exists: /data/data/PACKAGE_NAME/files/shared/IMG_20140506_141221.jpg
PACKAGE_NAME W/TAG: Attempting to attach file /shared_files/IMG_20140506_141221.jpg with mime type: image/jpeg
778-791/? I/PackageManager﹕ Action: "android.intent.action.VIEW"
778-791/? I/PackageManager﹕ Category: "android.intent.category.DEFAULT"
778-791/? I/PackageManager﹕ Type: "image/jpeg"
778-791/? I/PackageManager﹕ Adding preferred activity ComponentInfo{com.google.android.gallery3d/com.android.gallery3d.app.GalleryActivity} for user 0 :
778-788/? I/ActivityManager﹕ START u0 {act=android.intent.action.VIEW typ=image/jpeg flg=0x3000001 cmp=com.google.android.gallery3d/com.android.gallery3d.app.GalleryActivity (has extras)} from pid 6209
778-1872/? I/ActivityManager﹕ Start proc com.google.android.gallery3d for activity com.google.android.gallery3d/com.android.gallery3d.app.GalleryActivity: pid=10602 uid=10039 gids={50039, 3003, 1028, 1015}
10602-10602/? V/StateManager﹕ startState class com.android.gallery3d.app.AlbumSetPage
发生的事情是找到文件,生成URI,并正确检测mimetype;我从Android获得了准确的处理程序列表,当我选择“Gallery”时,Gallery活动已启动,但它直接进入设备自己的库 – 没有错误消息,但也没有打开的图像.此行为似乎与其他图像查看器一致 – 例如G Photos.
真正奇怪的是,如果我使用声明的Intent ACTION_SEND执行相同的代码,则文件会正确附加到Gmail中的电子邮件中. (事实上,这就是我对应用程序的内部日志记录所做的事情.)所以我似乎不太可能错误地格式化内容URI.我最好的猜测是我使用了错误的Intent动作？但我不知道什么比ACTION_VIEW更好.
有任何想法吗？