Android Open Source - Android-CriminalIntent Picture Utils

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License

The source code is released under:

MIT License

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Java Source Code

package com.bignerdranch.android.criminalintent;
/*from   w w w . j a v  a2 s. c  om*/
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.graphics.drawable.BitmapDrawable;
import android.view.Display;
import android.widget.ImageView;

/**
 * Utilities for scaling Photos
 * Created by mweekes on 1/4/14.
 */
public class PictureUtils {
    /**
     * Get a BitmapDrawable from a local file that is scaled down to fit the current Window size.
     */
    @SuppressWarnings("deprecation")
    public static BitmapDrawable getScaledDrawable(Activity activity, String path) {
        Display display = activity.getWindowManager().getDefaultDisplay();
        float destWidth = display.getWidth();
        float destHeight = display.getHeight();

        // Read in the dimensions of the image from storage
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeFile(path, options);

        float srcWidth = options.outWidth;
        float srcHeight = options.outHeight;

        int inSampleSize = 1;
        if (srcHeight > destHeight || srcWidth > destWidth) {
            if (srcWidth > srcHeight) {
                inSampleSize = Math.round(srcHeight / destHeight);
            } else {
                inSampleSize = Math.round(srcWidth / destWidth);
            }
        }

        options = new BitmapFactory.Options();
        options.inSampleSize = inSampleSize;

        Bitmap bitmap = BitmapFactory.decodeFile(path, options);
        return new BitmapDrawable(activity.getResources(), bitmap);
    }

    public static void cleanImageView(ImageView imageView) {
        if (!(imageView.getDrawable() instanceof BitmapDrawable)) {
            return;
        }

        // Clean up the view's image for the sake of memory
        BitmapDrawable bitmapDrawable = (BitmapDrawable) imageView.getDrawable();
        bitmapDrawable.getBitmap().recycle();
        imageView.setImageDrawable(null);
    }

    public static BitmapDrawable getPortraitDrawable(ImageView view, BitmapDrawable image) {
        Matrix matrix = new Matrix();
        matrix.postRotate(90);

        Bitmap bitmap = Bitmap.createBitmap(
                image.getBitmap(),
                0,
                0,
                image.getIntrinsicWidth(),
                image.getIntrinsicHeight(),
                matrix,
                true);
        BitmapDrawable rotatedImage = new BitmapDrawable(view.getResources(), bitmap);
        return rotatedImage;
    }
}

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