java - 如何选择 jpeg 图像 rom android 画廊？

Question

我需要创建一个应用程序，从我的 Android 应用程序打开 Android 图库，我应该只能查看图库中的 .jpeg 图像，其他图像（如 .png 或任何其他格式）应该被删除。

有人可以建议如何做到这一点吗？

Answer 1

look this example for txt you can do the same with jpg files, just list the files and select only that you want to use. Android: File list in ListView. NOTE: The folder for gallery is Enviroment.DIRECTORY_DCIM

Answer 2

这是代码：

Intent intent = new Intent(); 
intent.setType("image/jpeg");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
Main.this.startActivity(intent); 

但不确定是否所有 android 画廊应用程序都会额外支持该类型

Answer 3

干得好...

// Directory path here
String path = "PATH/TO/GALLERY"; 
File folder = new File(path);
File[] directoryListing = folder.listFiles(); 
for (int i = 0; i < listOfFiles.length; i++) {
    if (listOfFiles[i].isFile()) {
        files = listOfFiles[i].getName();
        if (files.endsWith(".JPG") || files.endsWith(".JPEG")) {
           // Handle your file here
        }
    }
}

Answer 4

Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
photoPickerIntent.setType("image/jpg");
startActivityForResult(photoPickerIntent, 1);    

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) { 
    super.onActivityResult(requestCode, resultCode, imageReturnedIntent); 

    switch(requestCode) { 
    case 1:
        if(resultCode == RESULT_OK){  
            Uri selectedImage = imageReturnedIntent.getData();
            InputStream imageStream = getContentResolver().openInputStream(selectedImage);
            Bitmap yourSelectedImage = BitmapFactory.decodeStream(imageStream);
        }
    }
}