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147 changes: 147 additions & 0 deletions
147
library/src/main/java/com/ruffian/library/widget/shadow/ShadowBitmapDrawable.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,147 @@ | ||
| package com.ruffian.library.widget.shadow; | ||
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| import android.graphics.Bitmap; | ||
| import android.graphics.Canvas; | ||
| import android.graphics.Paint; | ||
| import android.graphics.Path; | ||
| import android.graphics.Rect; | ||
| import android.graphics.RectF; | ||
| import android.graphics.drawable.BitmapDrawable; | ||
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| import com.ruffian.library.widget.utils.ReflectUtils; | ||
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| import java.util.Arrays; | ||
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| /** | ||
| * ShadowBitmapDrawable | ||
| * | ||
| * @author ZhongDaFeng | ||
| */ | ||
| public class ShadowBitmapDrawable extends BitmapDrawable { | ||
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| private int mShadowColor;//阴影颜色 | ||
| private float mShadowRadius;//阴影半径 | ||
| private float[] mRoundRadii;//矩形圆角半径 | ||
| private int mShadowDx;//阴影x偏移 | ||
| private int mShadowDy;//阴影y偏移 | ||
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| private RectF mBoundsF; | ||
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| public ShadowBitmapDrawable() { | ||
| mBoundsF = new RectF(); | ||
| } | ||
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| /** | ||
| * RBaseHelp中属性修改时调用 | ||
| * | ||
| * @param shadowColor | ||
| * @param shadowRadius | ||
| * @param shadowDx | ||
| * @param shadowDy | ||
| * @param roundRadii | ||
| */ | ||
| public void updateParameter(int shadowColor, float shadowRadius, int shadowDx, int shadowDy, float[] roundRadii) { | ||
| boolean needUpdate = false; | ||
| if (mShadowColor != shadowColor || mShadowRadius != shadowRadius | ||
| || mShadowDx != shadowDx || mShadowDy != shadowDy | ||
| || !Arrays.equals(mRoundRadii, roundRadii)) { | ||
| needUpdate = true; | ||
| } | ||
| this.mShadowColor = shadowColor; | ||
| this.mRoundRadii = roundRadii; | ||
| this.mShadowRadius = shadowRadius; | ||
| this.mShadowDx = shadowDx; | ||
| this.mShadowDy = shadowDy; | ||
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| if (needUpdate) { | ||
| //重新创建bitmap | ||
| Bitmap bitmap = makeShadowBitmap((int) mBoundsF.width(), (int) mBoundsF.height(), mShadowRadius, mShadowDx, mShadowDy, mShadowColor, mRoundRadii); | ||
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| //反射调用函数 setBitmap 更新阴影图片 | ||
| ReflectUtils.invokeMethod(this, "setBitmap", new Class[]{Bitmap.class}, new Object[]{bitmap}); | ||
| } | ||
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| } | ||
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| @Override | ||
| protected void onBoundsChange(Rect bounds) { | ||
| super.onBoundsChange(bounds); | ||
| if (bounds.right - bounds.left > 0 && bounds.bottom - bounds.top > 0) { | ||
| updateBounds(bounds); | ||
| } | ||
| } | ||
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| /** | ||
| * 更新Bounds | ||
| * | ||
| * @param bounds | ||
| */ | ||
| private void updateBounds(Rect bounds) { | ||
| if (bounds == null) bounds = getBounds(); | ||
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| float left = bounds.left + mShadowRadius + Math.abs(mShadowDx); | ||
| float right = bounds.right - mShadowRadius - Math.abs(mShadowDx); | ||
| float top = bounds.top + mShadowRadius + Math.abs(mShadowDy); | ||
| float bottom = bounds.bottom - mShadowRadius - Math.abs(mShadowDy); | ||
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| mBoundsF.set(left, top, right, bottom); | ||
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| //重新创建bitmap(不等高列表复用时可能会出现内存抖动，待优化) | ||
| Bitmap bitmap = makeShadowBitmap((int) mBoundsF.width(), (int) mBoundsF.height(), mShadowRadius, mShadowDx, mShadowDy, mShadowColor, mRoundRadii); | ||
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| //反射调用函数 setBitmap 更新阴影图片 | ||
| ReflectUtils.invokeMethod(this, "setBitmap", new Class[]{Bitmap.class}, new Object[]{bitmap}); | ||
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| } | ||
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| /** | ||
| * 创建阴影Bitmap | ||
| * | ||
| * @param shadowWidth | ||
| * @param shadowHeight | ||
| * @param shadowRadius | ||
| * @param dx | ||
| * @param dy | ||
| * @param shadowColor | ||
| * @param radii | ||
| * @return | ||
| */ | ||
| public Bitmap makeShadowBitmap(int shadowWidth, int shadowHeight, float shadowRadius, | ||
| float dx, float dy, int shadowColor, float[] radii) { | ||
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| //容错处理 | ||
| if (shadowWidth <= 0 || shadowHeight <= 0) | ||
| return Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_4444); | ||
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| //阴影bitmap | ||
| Bitmap output = Bitmap.createBitmap(shadowWidth, shadowHeight, Bitmap.Config.ARGB_4444); | ||
| Canvas canvas = new Canvas(output); | ||
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| RectF shadowRect = new RectF(shadowRadius, shadowRadius, shadowWidth - shadowRadius, shadowHeight - shadowRadius); | ||
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| //存在偏移时重新计算阴影矩形大小 | ||
| shadowRect.top += Math.abs(dy); | ||
| shadowRect.bottom -= Math.abs(dy); | ||
| shadowRect.left += Math.abs(dx); | ||
| shadowRect.right -= Math.abs(dx); | ||
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| //阴影画笔 | ||
| Paint shadowPaint = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.DITHER_FLAG); | ||
| shadowPaint.setColor(shadowColor); | ||
| shadowPaint.setShadowLayer(shadowRadius, dx, dy, shadowColor); | ||
|
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| //路径 | ||
| Path path = new Path(); | ||
| path.addRoundRect(shadowRect, radii, Path.Direction.CW); | ||
| canvas.drawPath(path, shadowPaint); | ||
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| return output; | ||
| } | ||
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| } |
63 changes: 63 additions & 0 deletions
63
library/src/main/java/com/ruffian/library/widget/utils/ReflectUtils.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,63 @@ | ||
| package com.ruffian.library.widget.utils; | ||
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| import java.lang.reflect.InvocationTargetException; | ||
| import java.lang.reflect.Method; | ||
|
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| /** | ||
| * 反射工具类 | ||
| * | ||
| * @author ZhongDaFeng | ||
| */ | ||
| public class ReflectUtils { | ||
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| /** | ||
| * 循环向上转型, 获取对象的 DeclaredMethod | ||
| * | ||
| * @param object 子类对象 | ||
| * @param methodName 父类中的方法名 | ||
| * @param parameterTypes 父类中的方法参数类型 | ||
| * @return 父类中的方法对象 | ||
| */ | ||
| public static Method getDeclaredMethod(Object object, String methodName, Class<?>... parameterTypes) { | ||
| Method method = null; | ||
| for (Class<?> clazz = object.getClass(); clazz != Object.class; clazz = clazz.getSuperclass()) { | ||
| try { | ||
| method = clazz.getDeclaredMethod(methodName, parameterTypes); | ||
| return method; | ||
| } catch (Exception e) { | ||
| //这里甚么都不要做！并且这里的异常必须这样写，不能抛出去。 | ||
| //如果这里的异常打印或者往外抛，则就不会执行clazz = clazz.getSuperclass(),最后就不会进入到父类中了 | ||
| } | ||
| } | ||
| return null; | ||
| } | ||
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| /** | ||
| * 直接调用对象方法, 而忽略修饰符(private, protected, default) | ||
| * | ||
| * @param object 子类对象 | ||
| * @param methodName 父类中的方法名 | ||
| * @param parameterTypes 父类中的方法参数类型 | ||
| * @param parameters 父类中的方法参数 | ||
| * @return 父类中方法的执行结果 | ||
| */ | ||
| public static Object invokeMethod(Object object, String methodName, Class<?>[] parameterTypes, Object[] parameters) { | ||
| //根据 对象、方法名和对应的方法参数 通过反射 调用上面的方法获取 Method 对象 | ||
| Method method = getDeclaredMethod(object, methodName, parameterTypes); | ||
| try { | ||
| if (null != method) { | ||
| //抑制Java对方法进行检查,主要是针对私有方法而言 | ||
| method.setAccessible(true); | ||
| //调用object 的 method 所代表的方法，其方法的参数是 parameters | ||
| return method.invoke(object, parameters); | ||
| } | ||
| } catch (IllegalArgumentException e) { | ||
| e.printStackTrace(); | ||
| } catch (IllegalAccessException e) { | ||
| e.printStackTrace(); | ||
| } catch (InvocationTargetException e) { | ||
| e.printStackTrace(); | ||
| } | ||
| return null; | ||
| } | ||
| } |