LegacySDKUtil.java

package at.favre.lib.dali.util;

import android.annotation.TargetApi;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.os.Environment;
import android.view.View;
import android.widget.ImageView;

/**
 * Created by PatrickF on 30.05.2014.
 */
public class LegacySDKUtil {

	private LegacySDKUtil() {
	}

	public static float getX(View v) {
		if (Build.VERSION.SDK_INT >= 11) {
			return v.getX();
		} else {
			return v.getLeft();
		}
	}

	public static float getY(View v) {
		if (Build.VERSION.SDK_INT >= 11) {
			return v.getY();
		} else {
			return v.getTop();
		}
	}

	/**
	 * legacy helper for setting background
	 */
	public static void setViewBackground(View v, Drawable d) {
		if (Build.VERSION.SDK_INT >= 16) {
			v.setBackground(d);
		} else {
			v.setBackgroundDrawable(d);
		}
	}

	/**
	 * returns the bytesize of the give bitmap
	 */
	public static int byteSizeOf(Bitmap bitmap) {
		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
			return bitmap.getAllocationByteCount();
		} else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR1) {
			return bitmap.getByteCount();
		} else {
			return bitmap.getRowBytes() * bitmap.getHeight();
		}
	}

	public static String getBitmapId(Bitmap bitmap) {
		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR1) {
			return String.valueOf(bitmap.getGenerationId());
		} else {
			//TODO: this is really since bitmap has no implementation of hashcode
			return String.valueOf(bitmap.hashCode());
		}
	}

	/**
	 * Gets the appropriate cache dir
	 * @param ctx
	 * @return
	 */
	public static String getCacheDir(Context ctx) {
		return Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState()) || (!Environment.isExternalStorageRemovable() && ctx.getExternalCacheDir() != null) ?
				ctx.getExternalCacheDir().getPath() : ctx.getCacheDir().getPath();
	}


	@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
	public static void setImageAlpha(ImageView imageView, int alpha) {
		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
			imageView.setImageAlpha(alpha);
		} else {
			imageView.setAlpha(alpha);
		}
	}
}