从库中选择一个图像并将数据加密到它

时间:2014-05-08 18:57:36

标签: android jquery android-layout encryption steganography

我有一个xml布局,其中有一个按钮和一个文本字段。我在文本字段中填写了一些消息。现在,当我点击按钮时,我需要访问图库并选择图像。如何将邮件加密到此图像并再次保存到我的图库?此外,所有类型的加密都可以在此图像上完成,如AES

按钮调用Selimg()函数,当我点击它时,它应该打开画廊供我选择图像。该图片应存储在&缩图'中。这样我就可以进一步加密它了。到目前为止,这是我的代码:

公共类EncryptActivity扩展了Activity {

private static int RESULT_LOAD_IMAGE = 1;
 private static final int PICK_FROM_GALLERY = 2;
 Bitmap thumbnail = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.act_encrypt);
}
public void Selimg(){
       Intent in = new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                      startActivityForResult(in, RESULT_LOAD_IMAGE);

   }

public void onActivityResult(int requestCode, int resultCode, Intent data) {  

    super.onActivityResult(requestCode, resultCode, data);     

     if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data){

         Uri selectedImage = data.getData();
            String[] filePathColumn = { MediaStore.Images.Media.DATA };
            Cursor cursor = getContentResolver().query(selectedImage,filePathColumn, null, null, null);
            cursor.moveToFirst();
            int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
            String picturePath = cursor.getString(columnIndex);
            cursor.close();
            thumbnail = (BitmapFactory.decodeFile(picturePath));

} }

0 个答案:

没有答案