我通过存储在MediaStore中将位图附加到Imageview。它在android 10以下的所有设备上都可以正常工作,但是当崩溃发生在像素上时。我针对sdk 28的android id
try {
Bitmap thePic = MediaStore.Images.Media.GetBitmap(ContentResolver, croppedPicUri);
if(thePic != null){
imgProfileIcon.SetImageBitmap(thePic);
//mediaStorageDir = Environment.GetExternalStoragePublicDirectory(Environment.DirectoryDcim);
mediaStorageDir = GetExternalFilesDir(Environment.DirectoryPictures);
if (!mediaStorageDir.Exists())
{
mediaStorageDir.Mkdirs();
}
// Create a media file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").Format(new Java.Util.Date());
sendFile = new File(mediaStorageDir.Path + File.Separator + "IMG_" + timeStamp + ".png");
String path_ = MediaStore.Images.Media.InsertImage(this.ContentResolver, thePic, "Title", null);
if (path_ != null){
Uri tempUri = Uri.Parse(path_);
path = GetPathToImage(tempUri);
}
}
} catch (Exception ex) {
Toast.MakeText(this, "Bundle extras : " + ex.Message, ToastLength.Short).Show();
}
{Java.Lang.IllegalStateException:无法构建唯一文件:/ storage / emulated / 0 / Pictures Title image / jpeg在<205bc242eb64455b94479843fca3eeb7> :: 0中的Java.Interop.JniEnvironment + StaticMethods.CallStaticObjectMethod(Java.Interop.JniObjectReference类型,Java.Interop.JniMethodInfo方法,Java.Interop.JniArgumentValue * args)中[0x00069]在<205bc242eb64455b94479843fca3eeb7>:0中的Java.Interop.JniPeerMembers + JniStaticMethods.InvokeObjectMethod(System.String编码的成员,Java.Interop.JniArgumentValue *参数)[0x00018]中在<072ebd6d3ae947ac8b3980f8fd1aeee1>:0中的Android.Provider.MediaStore + Images + Media.InsertImage(Android.Content.ContentResolver cr,Android.Graphics.Bitmap源,System.String标题,System.String描述)[0x0008d]在D:\ EventApp \ EventApp \ Activity \ ProfileListActivity.cs:1310中的EventApp.ProfileListActivity.OnActivityResult(System.Int32 requestCode,Android.App.Result resultCode,Android.Content.Intent数据)[0x00200]处---托管Java.Lang.IllegalStateException堆栈跟踪的结尾-java.lang.IllegalStateException:无法构建唯一文件:/ storage / emulated / 0 / Pictures Title image / jpeg在android.os.Parcel.createException(Parcel.java:2079)在android.os.Parcel.readException(Parcel.java:2039)在android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:188)在android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:140)在android.content.ContentProviderProxy.insert(ContentProviderNative.java:481)在android.content.ContentResolver.insert(ContentResolver.java:1828)在android.provider.MediaStore.createPending(MediaStore.java:616)在android.provider.MediaStore $ Images $ Media.insertImage(MediaStore.java:1771)
使用数学的随机函数而不是时间戳来更改/创建文件,并确保FileOutputStream对象将被刷新。供参考,
private void SaveImage(Bitmap finalBitmap) {
String root = Environment.getExternalStorageDirectory().toString();
File myDir = new File(root + "/saved_images");
if (!myDir.exists()) {
myDir.mkdirs();
}
Random generator = new Random();
int n = 10000;
n = generator.nextInt(n);
String fname = "Image-"+ n +".jpg";
File file = new File (myDir, fname);
if (file.exists ())
file.delete ();
try {
FileOutputStream out = new FileOutputStream(file);
finalBitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
我发现通过MediaStore.Images.Media.insertImage(ContentResolver cr, Bitmap source, String title, String description)
方法保存图像时,必须在Android 10上显式指定title
参数。否则,文件名将如下所示:Image
。下一张图像将另存为Image (n)
。 n
达到值32后,App引发错误。
让我们考虑:
MediaStore.Images.Media.insertImage(ContentResolver cr, Bitmap source, String title, String description)
让我们将其应用于一个真实的示例:
MediaStore.Images.Media.insertImage(context.getContentResolver(), imageToSave, "ThisIsImageTitleString", null);
您会注意到,这可以安全地将任何类型的位图保存在内存中。但是输出位图名称如何?
第一次:
ThisIsImageTitleString
第二时间:
ThisIsImageTitleString(2)
...
第32次:
ThisIsImageTitleString(32)
第33次:
java.lang.IllegalStateException:无法构建唯一文件:/ storage / emulated / 0 / Pictures ThisIsImageTitleString image / jpeg
简单的解决方案:添加timestamp。
将其声明为常量(根据需要声明为静态或非静态)
static Date currentTime;
然后更改MediaStore的方式将位图保存到:
MediaStore.Images.Media.insertImage(context.getContentResolver(), imageToSave, "ThisIsImageTitleString" + " - " + (currentTime = Calendar.getInstance().getTime()), null);
请注意: (currentTime = Calendar.getInstance().getTime())
将“标题”替换为File.separator +“ IMG_” +时间戳+“ .png
例如String path = MediaStore.Images.Media.insertImage(inContext.getContentResolver(), inImage, File.separator + "IMG_" + timeStamp + ".png", null);
据我所知,API 29中已弃用此方法。
https://developer.android.com/reference/android/provider/MediaStore.Images.Media
insertImage(ContentResolver cr, String imagePath, String name, String description)
This method was deprecated in API level 29. inserting of images should be performed using MediaColumns#IS_PENDING, which offers richer control over lifecycle.
您应该对使用API 29+的设备使用MediaColumns#IS_PENDING。
更多信息:https://developer.android.com/training/data-storage/files/media#pending-media-files