package medusa.theone.waterdroplistview.utils;
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import android.graphics.Bitmap;
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import android.graphics.Canvas;
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import android.graphics.PixelFormat;
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import android.graphics.drawable.Drawable;
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import android.view.View;
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import android.view.ViewGroup;
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/**
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* Created by xiayong on 2015/6/27.
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*/
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public class Utils {
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/**
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* Map a value within a given range to another range.
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* @param value the value to map
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* @param fromLow the low end of the range the value is within
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* @param fromHigh the high end of the range the value is within
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* @param toLow the low end of the range to map to
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* @param toHigh the high end of the range to map to
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* @return the mapped value
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*/
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public static double mapValueFromRangeToRange(
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double value,
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double fromLow,
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double fromHigh,
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double toLow,
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double toHigh) {
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double fromRangeSize = fromHigh - fromLow;
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double toRangeSize = toHigh - toLow;
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double valueScale = (value - fromLow) / fromRangeSize;
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return toLow + (valueScale * toRangeSize);
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}
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/**
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* set margins of the specific view
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* @param target
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* @param l
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* @param t
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* @param r
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* @param b
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*/
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public static void setMargin(View target, int l, int t, int r, int b){
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if (target.getLayoutParams() instanceof ViewGroup.MarginLayoutParams) {
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ViewGroup.MarginLayoutParams p = (ViewGroup.MarginLayoutParams) target.getLayoutParams();
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p.setMargins(l, t, r, b);
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target.requestLayout();
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}
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}
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/**
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* convert drawable to bitmap
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* @param drawable
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* @return
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*/
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public static Bitmap drawableToBitmap(Drawable drawable) {
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int width = drawable.getIntrinsicWidth();
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int height = drawable.getIntrinsicHeight();
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Bitmap bitmap = Bitmap.createBitmap(width, height, drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565);
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Canvas canvas = new Canvas(bitmap);
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drawable.setBounds(0, 0, width, height);
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drawable.draw(canvas);
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return bitmap;
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}
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}
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