如何从 png 文件中加载 ImageView? [英] How to load an ImageView from a png file?

问题描述

我用相机拍照

Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE );
startActivityForResult( intent, 22 );

活动完成后，我将位图图片写入 PNG 文件.

When the activity completes, I write the bitmap picture out to a PNG file.

    java.io.FileOutputStream out = openFileOutput("myfile.png", Context.MODE_PRIVATE);
    bmp.compress(Bitmap.CompressFormat.PNG, 90, out);

没问题，我可以看到文件是在我的应用私有数据空间中创建的.

That goes OK, and I can see the file is created in my app private data space.

稍后我想使用 ImageView 显示该图像时遇到了困难.

I'm having difficulty when I later want to display that image using an ImageView.

任何人都可以建议代码来执行此操作吗?

Can anyone suggest code to do this?

如果我尝试创建一个包含路径分隔符的文件，它会失败.如果我尝试从不带分隔符的名称创建 Uri，则会失败.

If I try to create a File with path separators in, it fails. If I try to create a Uri from a name without separators, that fails.

我可以使用以下命令打开文件OK:

I can open the file OK using:

        java.io.FileInputStream in = openFileInput("myfile.png");

但这并没有给我设置图像所需的 Uri

But that doesn't give me the Uri I need to set an image with

   iv.setImageURI(u)

总结:我在私人应用数据中的 png 文件中有图片.将其设置为 ImageView 的代码是什么?

Summary: I have the picture in a png file in private app data. What's the code to set that into an ImageView?

谢谢.

推荐答案

尝试 BitmapFactory.decodeFile() 然后 setImageBitmap() 在 ImageView.

Try BitmapFactory.decodeFile() and then setImageBitmap() on the ImageView.

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