Изменить размер изображения под телефон

public class DrawView extends View {
private Bitmap bitmap1;
private Bitmap bitmapSource1;
public DrawView(Context context) {
        paint = new Paint(Paint.ANTI_ALIAS_FLAG);
        bitmapSource1 = BitmapFactory.decodeResource(getResources(), R.drawable.background);
        bitmap1 = Bitmap.createBitmap(bitmapSource1, 0, 0, 1280, 800, matrix, true);
}
 @Override
    public  void  onDraw(Canvas canvas) {
        canvas.drawBitmap(bitmap1, 0, 0, paint);
}
}

private Bitmap getScaledBitMapBaseOnScreenSize(Bitmap bitmapOriginal){
 
    Bitmap scaledBitmap=null;
    try {
        DisplayMetrics metrics = new DisplayMetrics();
        getActivity().getWindowManager().getDefaultDisplay().getMetrics(metrics);
 
 
        int width = bitmapOriginal.getWidth();
        int height = bitmapOriginal.getHeight();
 
        float scaleWidth = metrics.scaledDensity;
        float scaleHeight = metrics.scaledDensity;
 
        // create a matrix for the manipulation
        Matrix matrix = new Matrix();
        // resize the bit map
        matrix.postScale(scaleWidth, scaleHeight);
 
        // recreate the new Bitmap
        scaledBitmap = Bitmap.createBitmap(bitmapOriginal, 0, 0, width, height, matrix, true);
    }
    catch (Exception e){
        e.printStackTrace();
    }
    return scaledBitmap;
}

 Bitmap scaleBitmap=getScaledBitMapBaseOnScreenSize(originalBitmapImage);
    if(scaleBitmap!=null) {
    imageView.setImageBitmap(scaleBitmap);
    }

 Bitmap scaleBitmap=getScaledBitMapBaseOnScreenSize(originalBitmapImage);

    private Bitmap getBitmapFullScreen(Bitmap bitmap){
        DisplayMetrics metrics = new DisplayMetrics();
        getActivity().getWindowManager().getDefaultDisplay().getMetrics(metrics);
        Bitmap bitmapOutput = Bitmap.createScaledBitmap(bitmap, metrics.widthPixels,
                metrics.heightPixels, false);
        return bitmapOutput;
    }

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.View;
 
public class DrawView extends View {
 
    private final Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
    private Bitmap scaledBitmap;
 
    public DrawView(Context context) {
        super(context);
    }
 
    public DrawView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }
 
    @Override
    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
        super.onSizeChanged(w, h, oldw, oldh);
        if (w == 0 || h == 0) return;
        final BitmapFactory.Options options = new BitmapFactory.Options();
        options.inScaled = false;
        final Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.background, options);
        scaledBitmap = Bitmap.createScaledBitmap(bitmap, w, h, true);
    }
 
    @Override
    protected void onDraw(Canvas canvas) {
        canvas.drawBitmap(scaledBitmap, 0, 0, paint);
    }
}