Get Image from the Gallery and Show in ImageView

问题:

I need to get an image from the gallery on a button click and show it into the imageview.

I am doing it in the following way:

    btn_image_button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            getImageFromAlbum();
        }
    });

The method Definition is as:

   private void getImageFromAlbum(){
    try{
        Intent i = new Intent(Intent.ACTION_PICK,
                android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
        startActivityForResult(i, RESULT_LOAD_IMAGE);
    }catch(Exception exp){
        Log.i("Error",exp.toString());
    }
}

The activity result method is

  @Override
  protected 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();

        try {
            bmp = getBitmapFromUri(selectedImage);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        image_view.setImageBitmap(bmp);

        //to know about the selected image width and height
        Toast.makeText(MainActivity.this, image_view.getDrawable().getIntrinsicWidth()+" & "+image_view.getDrawable().getIntrinsicHeight(), Toast.LENGTH_SHORT).show();
    }

}

---

The Problem

The problem I am facing is when the image resolution is high suppose that if the image size is of 5mp to 13mp. It won't loads up and show up into the image view.

But the images with the low width and height are successfully loading into the image view!

Can somebody tell me any issues with the code and what I am doing wrong? I just want to import the camera images from the gallery and show them in the image view!

回答1:

you can try this.

paste this code in your button click event.

Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
photoPickerIntent.setType("image/*");
startActivityForResult(photoPickerIntent, RESULT_LOAD_IMG);

and below code is your on activity result

@Override
    protected void onActivityResult(int reqCode, int resultCode, Intent data) {
        super.onActivityResult(reqCode, resultCode, data);


        if (resultCode == RESULT_OK) {
            try {
                final Uri imageUri = data.getData();
                final InputStream imageStream = getContentResolver().openInputStream(imageUri);
                final Bitmap selectedImage = BitmapFactory.decodeStream(imageStream);
                image_view.setImageBitmap(selectedImage);
            } catch (FileNotFoundException e) {
                e.printStackTrace();
                Toast.makeText(PostImage.this, "Something went wrong", Toast.LENGTH_LONG).show();
            }

        }else {
            Toast.makeText(PostImage.this, "You haven't picked Image",Toast.LENGTH_LONG).show();
        }
    }

its helpfull for you.

回答2:

I use this code: This code used to start gallery activity.

Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
photoPickerIntent.setType("image/*");
startActivityForResult(photoPickerIntent, GALLERY_REQUEST);

And get the result in:

@Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(resultCode == Activity.RESULT_OK)
        switch (requestCode){
            case GALLERY_REQUEST:
                Uri selectedImage = data.getData();
                try {
                    Bitmap bitmap = MediaStore.Images.Media.getBitmap(getActivity().getContentResolver(), selectedImage);
                    carImage.setImageBitmap(bitmap);
                } catch (IOException e) {
                    Log.i("TAG", "Some exception " + e);
                }
                break;
        }
    }

And don't forget to declare permission in AndroidManifest.

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>