无法解析方法“getdrawable()”

Question

I'm a newbie in programming. I want to build a QR Code Generator that the QR Code can be saved or downloaded.

Here's my code for the generator:

    public class GeneratorActivity extends AppCompatActivity {

    EditText text;
    Button gen_btn;
    ImageView image;
    String text2Qr;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_generator);
        text = findViewById(R.id.text);
        gen_btn = findViewById(R.id.gen_btn);
        image = findViewById(R.id.image);
        gen_btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                text2Qr = text.getText().toString().trim();
                MultiFormatWriter multiFormatWriter = new MultiFormatWriter();
                try{
                    BitMatrix bitMatrix = multiFormatWriter.encode(text2Qr, BarcodeFormat.QR_CODE,200,200);
                    BarcodeEncoder barcodeEncoder = new BarcodeEncoder();
                    Bitmap bitmap = barcodeEncoder.createBitmap(bitMatrix);
                    image.setImageBitmap(bitmap);
                    bitmap = ((BitmapDrawable) ImageView.getdrawable()).getBitmap();

                }
                catch (WriterException e){
                    e.printStackTrace();
                }



            }
        });
    }
}

I got a error that I cannot resolve method 'getdrawable()

anybody know how to fix this?

Here's the screenshot of the error: screenshot

Answer 1

getDrawable

Return a drawable object associated with a particular resource ID and styled for the specified theme.

You should pass OBJECT

bitmap = ((BitmapDrawable) image.getDrawable()).getBitmap();

FYI

Drawable drawable = image.getDrawable();

Answer 2

You already have a bitmap and you have set it to imageview. Why do you need this line

bitmap = ((BitmapDrawable) ImageView.getdrawable()).getBitmap();

The error is saying that there is no method called getDrawable() in the ImageView class.

Answer 3

get the drawable like from imageview like

Drawable myDrawable = imageView.getDrawable();

You can compare it with a drawable resource like

if(iv.getDrawable()==getResources().getDrawable(R.drawable.image1)){
    //do work here
}

Answer 4

I think you can use it Bitmap bitmap = barcodeEncoder.createBitmap(bitMatrix); directly. may be not need bitmap = ((BitmapDrawable) image.getdrawable()).getBitmap();

Answer 5

You are getting drawable from empty imageview that will return null. for getting bitmap from drawble , try this method.

public static Bitmap drawableToBitmap (Drawable drawable) {
        Bitmap bitmap = null;

        if (drawable instanceof BitmapDrawable) {
            BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;
            if(bitmapDrawable.getBitmap() != null) {
                return bitmapDrawable.getBitmap();
            }
        }

Hope it will help you!!