无法从画廊中挑选照片？-Java 学习之路

我可以打开图库并获取图库的路径= content：// media / external / images / media / 2但不能在imageview中解码这是我的代码

public void onCreate（Bundle savedInstanceState）{super.onCreate（savedInstanceState）;的setContentView（R.layout.main）;

b=(Button) findViewById(R.id.Button01);
            b.setOnClickListener(new OnClickListener() {

                public void onClick(View arg0) {

                    // in onCreate or any event where your want the user to
                    // select a file
                    Intent intent = new Intent();
                    intent.setType("image/*");
                    intent.setAction(Intent.ACTION_GET_CONTENT);
                    startActivityForResult(intent,IMAGE_PICK);
                }
            });
        }

        //UPDATED
        public void onActivityResult(int requestCode, int resultCode, Intent data) {
            if (resultCode == RESULT_OK) {
                if (requestCode == IMAGE_PICK) {
                    Uri selectedImageUri = data.getData();


                    //OI FILE Manager
                    filemanagerstring = selectedImageUri.getPath();

                    //MEDIA GALLERY
                    selectedImagePath = getPath(selectedImageUri);




                    if(selectedImagePath!=null)
                    {
                        path = selectedImageUri.toString();
                         m1.setPath(path);


                          BitmapFactory.Options options = new BitmapFactory.Options();
                          options.inSampleSize = 4;

                             Bitmap yourSelectedImage = BitmapFactory.decodeFile(path, options);
                             ImageButton img2=(ImageButton)findViewById(R.id.widget27);
                             img2.setImageBitmap(yourSelectedImage);
                             Toast.makeText(getBaseContext(), path, 1000).show();

                           }



                    }
            }
        }
        public String getPath(Uri uri) {





        String [] proj={MediaStore.Images.Media.DATA};   
        Cursor cursor = managedQuery(uri,   
                proj, // Which columns to return   
                null,       // WHERE clause; which rows to return (all rows)   
                null,       // WHERE clause selection arguments (none)   
                null); // Order-by clause (ascending by name)   
        int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);   
        cursor.moveToFirst();   

        return cursor.getString(column_index);

}}

请提前帮助谢谢

2 回答

0
我们需要在早期的onActivityResult（）的图库选择器代码中进行以下更改/修复，以便在Kitkat和所有其他早期版本上无缝运行 .

Uri selectedImgFileUri = data.getData（）;

if（selectedImgFileUri == null）{
```
// user has not selected any photo
```
}

尝试{

InputStream input = mActivity.getContentResolver（） . openInputStream（selectedImgFileUri）;

mSelectedPhotoBmp = BitmapFactory.decodeStream（输入）;

} catch（Throwable tr）{

//显示要再次尝试的消息

}
回复于 2024-05-08T05:25:56+08:00

这段代码应该放在你的onActivityResult中 . 它为您提供了从获取的图像URI解码文件路径的方法：

Uri selectedImageUri = data.getData();
            String[] projection = { MediaStore.Images.Media.DATA}; 
            Cursor cursor = managedQuery(selectedImageUri, projection, null, null, null); 
            int column_index_data = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
            cursor.moveToFirst(); 
            selectedImagePath = cursor.getString(column_index_data);
            Bitmap galleryImage = BitmapFactory.decodeFile(selectedImagePath);

回复于 2024-05-08T05:25:56+08:00

无法从画廊中挑选照片？

2 回答

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