无法将流图像解码为片段。

huangapple
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英文:

Unable to Decode Stream Image to Fragment

问题

以下是翻译后的内容：

代码部分略。

英文:

The Code Works perfectly but Im having problem with the Permission Denied but i already put READ_EXTERNAL_STORAGE and WRITE_EXTERNAL_STORAGE permission on Android Manifest any idea. Already Tried this one https://stackoverflow.com/questions/53358582/unable-to-decode-stream-java-io-filenotfoundexception-permission-denied

https://stackoverflow.com/questions/29163444/bitmapfactory-unable-to-decode-stream-null

> E/BitmapFactory: Unable to decode stream:
> java.io.FileNotFoundException:
> /storage/emulated/0/DCIM/Camera/IMG_20201001_125759.jpg (Permission
> denied)

AndroidManifest.xml

  1.  <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
  2.  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

MainActivity

  1.     //Open phone gallery
  2.     private void getImageFromGallery(){
  3.         Intent i = new Intent(Intent.ACTION_PICK,
  4.                 android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
  5.         startActivityForResult(i, GALLERY_REQUEST);
  6.     }
  8. @Override
  9.     protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
  10.         super.onActivityResult(requestCode, resultCode, data);
  11.         //Check if the intent was to pick image, was successful and an image was picked
  12.         if (requestCode == GALLERY_REQUEST && resultCode == RESULT_OK && null != data) {
  13.             Uri selectedImage = data.getData();
  14.             String[] filePathColumn = { MediaStore.Images.Media.DATA };
  15.             Cursor cursor = getContentResolver().query(selectedImage,filePathColumn, null, null, null);
  16.             cursor.moveToFirst();
  17.             int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
  18.             String picturePath = cursor.getString(columnIndex);
  19.             cursor.close();
  20.             ImageView imageView = (ImageView) findViewById(R.id.the_grid_image_preview);
  21.             imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));
  22.         }
  23.     }

答案1

得分: 0

如果您使用的是 Android 6.0 版本或更高版本，则需要在运行时请求权限：

https://developer.android.com/training/permissions/requesting

为此，我使用一个名为Dexter的便捷包装器，它能够简化操作并且非常易于使用。

然后您可以在 Fragment 中编写以下函数：

  1. private fun checkFilePermissions(onPermissionGranted: () -> Unit) {
  2.     Dexter.withActivity(activity)
  3.         .withPermissions(
  4.             android.Manifest.permission.READ_EXTERNAL_STORAGE,
  5.             android.Manifest.permission.WRITE_EXTERNAL_STORAGE
  6.         )
  7.         .withListener(object : BaseMultiplePermissionsListener() {
  8.             override fun onPermissionsChecked(response: MultiplePermissionsReport) {
  9.                 if (response.areAllPermissionsGranted()) {
  10.                     onPermissionGranted()
  11.                 }
  12.             }
  13.         })
  14.         .check()
  15. }

当您调用 getImageFromGallery() 方法时，只需像这样调用它：

  1. ...
  2. checkFilePermissions {
  3.     getImageFromGallery()
  4. }
英文:

If you're using Android version 6.0 or up, you need to ask for permissions in runtime:

https://developer.android.com/training/permissions/requesting

For this I use a nice wrapper called Dexter which simplifies it and is really easy to use.

You can then write this function in your Fragment:

  1. private fun checkFilePermissions(onPermissionGranted: () -> Unit) {
  2.         Dexter.withActivity(activity)
  3.             .withPermissions(
  4.                 android.Manifest.permission.READ_EXTERNAL_STORAGE,
  5.                 android.Manifest.permission.WRITE_EXTERNAL_STORAGE
  6.             )
  7.             .withListener(object : BaseMultiplePermissionsListener() {
  8.                 override fun onPermissionsChecked(response: MultiplePermissionsReport) {
  9.                     if (response.areAllPermissionsGranted()) {
  10.                         onPermissionGranted()
  11.                     }
  12.                 }
  13.             })
  14.             .check()
  15.     }

And in when you call your method getImageFromGallery() just invoke it like this:

  2. ...
  3. checkFilePermissions {
  4.     getImageFromGallery()
  5. }

huangapple
  • 本文由 发表于 2020年10月1日 14:08:43
  • 转载请务必保留本文链接：https://go.coder-hub.com/64149941.html
  • android
  • arrays
  • java
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