get ImageView Matrix - Android User Interface

Android examples for User Interface:ImageView

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Description

get ImageView Matrix

Demo Code


import android.graphics.Matrix;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.util.Log;
import android.widget.ImageView;

public class Main{
    private static final String TAG = MatrixUtils.class.getSimpleName();
    public static Matrix getImageMatrix(ImageView imageView) {
        Log.v(TAG, "getImageMatrix, imageView " + imageView);

        int left = imageView.getLeft();
        int top = imageView.getTop();
        int right = imageView.getRight();
        int bottom = imageView.getBottom();

        Rect bounds = new Rect(left, top, right, bottom);

        Drawable drawable = imageView.getDrawable();

        Matrix matrix;//from  w ww  . j  a  v a2s .  c  o m
        ImageView.ScaleType scaleType = imageView.getScaleType();
        Log.v(TAG, "getImageMatrix, scaleType " + scaleType);

        if (scaleType == ImageView.ScaleType.FIT_XY) {
            matrix = imageView.getImageMatrix();
            if (!matrix.isIdentity()) {
                matrix = new Matrix(matrix);
            } else {
                int drawableWidth = drawable.getIntrinsicWidth();
                int drawableHeight = drawable.getIntrinsicHeight();
                if (drawableWidth > 0 && drawableHeight > 0) {
                    float scaleX = ((float) bounds.width()) / drawableWidth;
                    float scaleY = ((float) bounds.height())
                            / drawableHeight;
                    matrix = new Matrix();
                    matrix.setScale(scaleX, scaleY);
                } else {
                    matrix = null;
                }
            }
        } else {
            matrix = new Matrix(imageView.getImageMatrix());
        }

        return matrix;
    }
}

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