E/BitmapFactory: 无法解码流: java.io.FileNotFoundException for (No such file or directory)

Question

我尝试在同一 Activty 中打开图库中的图像并在 Imageview 中显示。我添加了 WRITE_EXTERNAL_STORAGE 、 READ_EXTERNAL_STORAGE 、 INTERNET 等权限。当我 select 来自画廊的图像和 return activity 它显示这种类型的错误

09-04 15:02:57.161 31642-31642/com.androidtutorialpoint.qrcodescanner E/BitmapFactory: Unable to decode stream: java.io.FileNotFoundException: file:/storage/emulated/0/Pictures/Screenshots/Screenshot_20180816-160721.png (No such file or directory)

这是我的代码：-

打开图库的按钮单击事件:-

btn?.setOnClickListener(object : View.OnClickListener { 覆盖乐趣 onClick(arg0: View) {

        val i = Intent(
                Intent.ACTION_PICK,
                android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI)

        startActivityForResult(i, RESULT_LOAD_IMAGE)
    }
})

这用于在Imageview中显示图像：-

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) { super.onActivityResult(requestCode, resultCode, 数据)

if (requestCode == RESULT_LOAD_IMAGE && resultCode == Activity.RESULT_OK && null != data) {
    val selectedImage = data.data
    val filePathColumn = arrayOf(MediaStore.Images.Media.DATA)

    val cursor = contentResolver.query(selectedImage!!,
            filePathColumn, null, null, null)
    cursor!!.moveToFirst()

    val columnIndex = cursor.getColumnIndex(filePathColumn[0])
    val picturePath = cursor.getString(columnIndex)
    cursor.close()

    val imageView = findViewById(R.id.imageView) as ImageView
    imageView.setImageBitmap(BitmapFactory.decodeFile("file://" + picturePath))

}

}

Answer 1

您的 query() 不需要 return 您可以使用的文件系统路径。

相反，将您的 Uri 传递给您最喜欢的图像加载库（Glide、Picasso 等）。他们可以将图像加载到您的 ImageView 中，在后台线程上完成所有 I/O。

E/BitmapFactory: 无法解码流: java.io.FileNotFoundException for (No such file or directory)

E/BitmapFactory: Unable to decode stream: java.io.FileNotFoundException for (No such file or directory)

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