标签：验证 ram blur render bounds 开发 instant res 指定
Android在实际开发中很多时候都要对图片进行一定的处理，这里总结的BitmapUtils 类包括一下几个功能：
1.Android图片倒影，
2.Android图片模糊处理，
3.Android图片圆角处理，
4.图片沿着y轴旋转一定角度，
5.Android给图片添加边框。
接下来就直接上代码了，代码中有一定的解释。直接哪来用就可以了。
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
|
/* * @Title: BitmapUtils.java * @Copyright: Corporation. Ltd. Copyright 1998-2018, All rights reserved * @Description: TODO<请描述此文件是做什么的> * @author: xjp * @data: 2014年9月18日 上午10:10:30 * @version: V1.0 */package com.mktech.bitmaputils;import android.annotation.SuppressLint;import android.annotation.TargetApi;import android.content.Context;import android.graphics.Bitmap;import android.graphics.BitmapShader;import android.graphics.Camera;import android.graphics.Canvas;import android.graphics.LinearGradient;import android.graphics.Matrix;import android.graphics.Paint;import android.graphics.PorterDuffXfermode;import android.graphics.Bitmap.Config;import android.graphics.Rect;import android.graphics.RectF;import android.graphics.Shader;import android.graphics.Shader.TileMode;import android.os.Build;import android.renderscript.Allocation;import android.renderscript.Element;import android.renderscript.RenderScript;import android.renderscript.ScriptIntrinsicBlur;import android.util.Log;/** * TODO<请描述这个类是干什么的> * * @author xjp * @data: 2014年9月18日 上午10:10:30 * @version: V1.0 */public class BitmapUtils { private static final String TAG = "BitmapUtils"; /** * * TODO<创建倒影图片> * @throw * @return Bitmap * @param srcBitmap 源图片的bitmap * @param reflectionHeight 图片倒影的高度 */ public static Bitmap createReflectedBitmap(Bitmap srcBitmap,int reflectionHeight) { if (null == srcBitmap) { Log.e(TAG, "the srcBitmap is null"); return null; } // The gap between the reflection bitmap and original bitmap. final int REFLECTION_GAP = 0; int srcWidth = srcBitmap.getWidth(); int srcHeight = srcBitmap.getHeight(); if (0 == srcWidth || srcHeight == 0) { Log.e(TAG, "the srcBitmap is null"); return null; } // The matrix Matrix matrix = new Matrix(); matrix.preScale(1, -1); try { // The reflection bitmap, width is same with original‘s, height is // half of original‘s. Bitmap reflectionBitmap = Bitmap.createBitmap(srcBitmap, 0, srcHeight - reflectionHeight, srcWidth, reflectionHeight, matrix, false); if (null == reflectionBitmap) { Log.e(TAG, "Create the reflectionBitmap is failed"); return null; } // Create the bitmap which contains original and reflection bitmap. Bitmap bitmapWithReflection = Bitmap.createBitmap(srcWidth, srcHeight + reflectionHeight, Bitmap.Config.ARGB_8888); if (null == bitmapWithReflection) { return null; } // Prepare the canvas to draw stuff. Canvas canvas = new Canvas(bitmapWithReflection); // Draw the original bitmap. canvas.drawBitmap(srcBitmap, 0, 0, null); // Draw the reflection bitmap. canvas.drawBitmap(reflectionBitmap, 0, srcHeight + REFLECTION_GAP, null); Paint paint = new Paint(); paint.setAntiAlias(true); LinearGradient shader = new LinearGradient(0, srcHeight, 0, bitmapWithReflection.getHeight() + REFLECTION_GAP, 0x70FFFFFF, 0x00FFFFFF, TileMode.MIRROR); paint.setShader(shader); paint.setXfermode(new PorterDuffXfermode( android.graphics.PorterDuff.Mode.DST_IN)); canvas.save(); // Draw the linear shader. canvas.drawRect(0, srcHeight, srcWidth, bitmapWithReflection.getHeight() + REFLECTION_GAP, paint); if (reflectionBitmap != null && !reflectionBitmap.isRecycled()){ reflectionBitmap.recycle(); reflectionBitmap = null; } canvas.restore(); return bitmapWithReflection; } catch (Exception e) { e.printStackTrace(); } Log.e(TAG, "Create the reflectionBitmap is failed"); return null; } /** * * TODO<图片圆角处理> * @throw * @return Bitmap * @param srcBitmap 源图片的bitmap * @param ret 圆角的度数 */ public static Bitmap getRoundImage(Bitmap srcBitmap, float ret) { if(null == srcBitmap){ Log.e(TAG, "the srcBitmap is null"); return null; } int bitWidth = srcBitmap.getWidth(); int bitHight = srcBitmap.getHeight(); BitmapShader bitmapShader = new BitmapShader(srcBitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP); Paint paint = new Paint(); paint.setAntiAlias(true); paint.setShader(bitmapShader); RectF rectf = new RectF(0, 0, bitWidth, bitHight); Bitmap outBitmap = Bitmap.createBitmap(bitWidth, bitHight, Config.ARGB_8888); Canvas canvas = new Canvas(outBitmap); canvas.drawRoundRect(rectf, ret, ret, paint); canvas.save(); canvas.restore(); return outBitmap; } /** * * TODO<图片沿着Y轴旋转一定角度> * @throw * @return Bitmap * @param srcBitmap 源图片的bitmap * @param reflectionHeight 图片倒影的高度 * @param rotate 图片旋转的角度 */ public static Bitmap skewImage(Bitmap srcBitmap, float rotate, int reflectionHeight) { if(null == srcBitmap){ Log.e(TAG, "the srcBitmap is null"); return null; } Bitmap reflecteBitmap = createReflectedBitmap(srcBitmap, reflectionHeight); if (null == reflecteBitmap){ Log.e(TAG, "failed to createReflectedBitmap"); return null; } int wBitmap = reflecteBitmap.getWidth(); int hBitmap = reflecteBitmap.getHeight(); float scaleWidth = ((float) 180) / wBitmap; float scaleHeight = ((float) 270) / hBitmap; Matrix matrix = new Matrix(); matrix.postScale(scaleWidth, scaleHeight); reflecteBitmap = Bitmap.createBitmap(reflecteBitmap, 0, 0, wBitmap, hBitmap, matrix, true); Camera localCamera = new Camera(); localCamera.save(); Matrix localMatrix = new Matrix(); localCamera.rotateY(rotate); localCamera.getMatrix(localMatrix); localCamera.restore(); localMatrix.preTranslate(-reflecteBitmap.getWidth() >> 1, -reflecteBitmap.getHeight() >> 1); Bitmap localBitmap2 = Bitmap.createBitmap(reflecteBitmap, 0, 0, reflecteBitmap.getWidth(), reflecteBitmap.getHeight(), localMatrix, true); Bitmap localBitmap3 = Bitmap.createBitmap(localBitmap2.getWidth(), localBitmap2.getHeight(), Bitmap.Config.ARGB_8888); Canvas localCanvas = new Canvas(localBitmap3); Paint localPaint = new Paint(); localPaint.setAntiAlias(true); localPaint.setFilterBitmap(true); localCanvas.drawBitmap(localBitmap2, 0.0F, 0.0F, localPaint); if (null != reflecteBitmap && !reflecteBitmap.isRecycled()) { reflecteBitmap.recycle(); reflecteBitmap = null; } if (null != localBitmap2 && !localBitmap2.isRecycled()) { localBitmap2.recycle(); localBitmap2 = null; } localCanvas.save(); localCanvas.restore(); return localBitmap3; } /** * * TODO<图片模糊化处理> * @throw * @return Bitmap * @param bitmap 源图片 * @param radius The radius of the blur Supported range 0 < radius <= 25 * @param context 上下文 */ @TargetApi(Build.VERSION_CODES.JELLY_BEAN_MR1) @SuppressLint("NewApi") public static Bitmap blurBitmap(Bitmap bitmap,float radius,Context context){ //Let‘s create an empty bitmap with the same size of the bitmap we want to blur Bitmap outBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888); //Instantiate a new Renderscript RenderScript rs = RenderScript.create(context); //Create an Intrinsic Blur Script using the Renderscript ScriptIntrinsicBlur blurScript = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs)); //Create the Allocations (in/out) with the Renderscript and the in/out bitmaps Allocation allIn = Allocation.createFromBitmap(rs, bitmap); Allocation allOut = Allocation.createFromBitmap(rs, outBitmap); //Set the radius of the blur if(radius > 25){ radius = 25.0f; }else if (radius <= 0){ radius = 1.0f; } blurScript.setRadius(radius); //Perform the Renderscript blurScript.setInput(allIn); blurScript.forEach(allOut); //Copy the final bitmap created by the out Allocation to the outBitmap allOut.copyTo(outBitmap); //recycle the original bitmap bitmap.recycle(); bitmap = null; //After finishing everything, we destroy the Renderscript. rs.destroy(); return outBitmap; } /** * TODO<给图片添加指定颜色的边框> * @param srcBitmap 原图片 * @param borderWidth 边框宽度 * @param color 边框的颜色值 * @return */ public static Bitmap addFrameBitmap(Bitmap srcBitmap,int borderWidth,int color) { if (srcBitmap == null){ Log.e(TAG, "the srcBitmap or borderBitmap is null"); return null; } int newWidth = srcBitmap.getWidth() + borderWidth ; int newHeight = srcBitmap.getHeight() + borderWidth ; Bitmap outBitmap = Bitmap.createBitmap(newWidth, newHeight, Config.ARGB_8888); Canvas canvas = new Canvas(outBitmap); Rect rec = canvas.getClipBounds(); rec.bottom--; rec.right--; Paint paint = new Paint(); //设置边框颜色 paint.setColor(color); paint.setStyle(Paint.Style.STROKE); //设置边框宽度 paint.setStrokeWidth(borderWidth); canvas.drawRect(rec, paint); canvas.drawBitmap(srcBitmap, borderWidth/2, borderWidth/2, null); canvas.save(Canvas.ALL_SAVE_FLAG); canvas.restore(); if (srcBitmap !=null && !srcBitmap.isRecycled()){ srcBitmap.recycle(); srcBitmap = null; } return outBitmap; } } |
以上代码经验证可以直接使用。
分享。
完结。
来自：http://www.2cto.com/kf/201409/335681.html
Android 中图可以用到的图片处理类 BitmapUtils
标签：验证 ram blur render bounds 开发 instant res 指定
原文地址：http://www.cnblogs.com/manmanlu/p/6599084.html
