屏幕截图

 1 package com.example.printscreen;
 2 
 3 import java.io.FileNotFoundException;
 4 import java.io.FileOutputStream;
 5 import java.io.IOException;
 6 import android.app.Activity;
 7 import android.graphics.Bitmap;
 8 import android.graphics.Rect;
 9 import android.view.View;
10 
11 public class ScreenShot {
12     // 获取指定Activity的截屏，保存到png文件
13     static Bitmap takeScreenShot(Activity activity) {
14         // View是你需要截图的View
15         View view = activity.getWindow().getDecorView();
16         view.setDrawingCacheEnabled(true);
17         view.buildDrawingCache();
18         Bitmap b1 = view.getDrawingCache();
19         // 获取状态栏高度
20         Rect frame = new Rect();
21         activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
22         int statusBarHeight = frame.top;
23         System.out.println(statusBarHeight);
24         // 获取屏幕长和高
25         int width = activity.getWindowManager().getDefaultDisplay().getWidth();
26         int height = activity.getWindowManager().getDefaultDisplay().getHeight();
27         // 去掉标题栏
28 //         Bitmap b = Bitmap.createBitmap(b1, 0, 25, 320, 455);
29         Bitmap b = Bitmap.createBitmap(b1, 0, statusBarHeight, width, height - statusBarHeight);
30         view.destroyDrawingCache();
31         return b;
32     }
33 
34     // 保存到sdcard
35     private static void savePic(Bitmap b, String strFileName) {
36         FileOutputStream fos = null;
37         try {
38             fos = new FileOutputStream(strFileName);
39             if (null != fos) {
40                 b.compress(Bitmap.CompressFormat.PNG, 90, fos);
41                 fos.flush();
42                 fos.close();
43             }
44         } catch (FileNotFoundException e) {
45             e.printStackTrace();
46         } catch (IOException e) {
47             e.printStackTrace();
48         }
49     }
50 }

 1 package com.example.printscreen;
 2 
 3 import android.support.v7.app.ActionBarActivity;
 4 import android.view.View;
 5 import android.view.View.OnClickListener;
 6 import android.widget.Button;
 7 import android.widget.ImageView;
 8 import android.graphics.Bitmap;
 9 import android.os.Bundle;
10 
11 public class MainActivity extends ActionBarActivity {
12     private ImageView imageView;
13     private Button button;
14     
15     @Override
16     protected void onCreate(Bundle savedInstanceState) {
17         super.onCreate(savedInstanceState);
18         setContentView(R.layout.activity_main);
19         setupView();
20         setLis();
21         
22     }
23     private void setLis() {
24         button.setOnClickListener(new OnClickListener() {
25             @Override
26             public void onClick(View v) {
27                 // 屏幕截图
28                 Bitmap bitmap1 = ScreenShot.takeScreenShot(MainActivity.this);
29                 // 初始化模糊工具
30                 Bitmap bitmap2 = Blur.fastblur(MainActivity.this, bitmap1, 25);
31                 imageView.setImageBitmap(bitmap2);
32             }
33         });
34         
35     }
36     private void setupView() {
37         imageView = (ImageView) findViewById(R.id.imageView);
38         button = (Button) findViewById(R.id.button);
39     }
40 }

  1 package com.example.printscreen;
  2 
  3 import android.annotation.SuppressLint;
  4 import android.content.Context;
  5 import android.graphics.Bitmap;
  6 import android.os.Build.VERSION;
  7 import android.renderscript.Allocation;
  8 import android.renderscript.Element;
  9 import android.renderscript.RenderScript;
 10 import android.renderscript.ScriptIntrinsicBlur;
 11 import android.util.Log;
 12 
 13 public class Blur {
 14 
 15     private static final String TAG = "Blur";
 16 
 17     @SuppressLint("NewApi")
 18     public static Bitmap fastblur(Context context, Bitmap sentBitmap, int radius) {
 19 
 20         if (VERSION.SDK_INT > 16) {
 21             Bitmap bitmap = sentBitmap.copy(sentBitmap.getConfig(), true);
 22 
 23             final RenderScript rs = RenderScript.create(context);
 24             final Allocation input = Allocation.createFromBitmap(rs, sentBitmap, Allocation.MipmapControl.MIPMAP_NONE,
 25                     Allocation.USAGE_SCRIPT);
 26             final Allocation output = Allocation.createTyped(rs, input.getType());
 27             final ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
 28             script.setRadius(radius /* e.g. 3.f */);
 29             script.setInput(input);
 30             script.forEach(output);
 31             output.copyTo(bitmap);
 32             return bitmap;
 33         }
 34 
 35         // Stack Blur v1.0 from
 36         // http://www.quasimondo.com/StackBlurForCanvas/StackBlurDemo.html
 37         //
 38         // Java Author: Mario Klingemann <mario at quasimondo.com>
 39         // http://incubator.quasimondo.com
 40         // created Feburary 29, 2004
 41         // Android port : Yahel Bouaziz <yahel at kayenko.com>
 42         // http://www.kayenko.com
 43         // ported april 5th, 2012
 44 
 45         // This is a compromise between Gaussian Blur and Box blur
 46         // It creates much better looking blurs than Box Blur, but is
 47         // 7x faster than my Gaussian Blur implementation.
 48         //
 49         // I called it Stack Blur because this describes best how this
 50         // filter works internally: it creates a kind of moving stack
 51         // of colors whilst scanning through the image. Thereby it
 52         // just has to add one new block of color to the right side
 53         // of the stack and remove the leftmost color. The remaining
 54         // colors on the topmost layer of the stack are either added on
 55         // or reduced by one, depending on if they are on the right or
 56         // on the left side of the stack.
 57         //
 58         // If you are using this algorithm in your code please add
 59         // the following line:
 60         //
 61         // Stack Blur Algorithm by Mario Klingemann <mario@quasimondo.com>
 62 
 63         Bitmap bitmap = sentBitmap.copy(sentBitmap.getConfig(), true);
 64 
 65         if (radius < 1) {
 66             return (null);
 67         }
 68 
 69         int w = bitmap.getWidth();
 70         int h = bitmap.getHeight();
 71 
 72         int[] pix = new int[w * h];
 73         Log.e("pix", w + " " + h + " " + pix.length);
 74         bitmap.getPixels(pix, 0, w, 0, 0, w, h);
 75 
 76         int wm = w - 1;
 77         int hm = h - 1;
 78         int wh = w * h;
 79         int div = radius + radius + 1;
 80 
 81         int r[] = new int[wh];
 82         int g[] = new int[wh];
 83         int b[] = new int[wh];
 84         int rsum, gsum, bsum, x, y, i, p, yp, yi, yw;
 85         int vmin[] = new int[Math.max(w, h)];
 86 
 87         int divsum = (div + 1) >> 1;
 88         divsum *= divsum;
 89         int dv[] = new int[256 * divsum];
 90         for (i = 0; i < 256 * divsum; i++) {
 91             dv[i] = (i / divsum);
 92         }
 93 
 94         yw = yi = 0;
 95 
 96         int[][] stack = new int[div][3];
 97         int stackpointer;
 98         int stackstart;
 99         int[] sir;
100         int rbs;
101         int r1 = radius + 1;
102         int routsum, goutsum, boutsum;
103         int rinsum, ginsum, binsum;
104 
105         for (y = 0; y < h; y++) {
106             rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0;
107             for (i = -radius; i <= radius; i++) {
108                 p = pix[yi + Math.min(wm, Math.max(i, 0))];
109                 sir = stack[i + radius];
110                 sir[0] = (p & 0xff0000) >> 16;
111                 sir[1] = (p & 0x00ff00) >> 8;
112                 sir[2] = (p & 0x0000ff);
113                 rbs = r1 - Math.abs(i);
114                 rsum += sir[0] * rbs;
115                 gsum += sir[1] * rbs;
116                 bsum += sir[2] * rbs;
117                 if (i > 0) {
118                     rinsum += sir[0];
119                     ginsum += sir[1];
120                     binsum += sir[2];
121                 } else {
122                     routsum += sir[0];
123                     goutsum += sir[1];
124                     boutsum += sir[2];
125                 }
126             }
127             stackpointer = radius;
128 
129             for (x = 0; x < w; x++) {
130 
131                 r[yi] = dv[rsum];
132                 g[yi] = dv[gsum];
133                 b[yi] = dv[bsum];
134 
135                 rsum -= routsum;
136                 gsum -= goutsum;
137                 bsum -= boutsum;
138 
139                 stackstart = stackpointer - radius + div;
140                 sir = stack[stackstart % div];
141 
142                 routsum -= sir[0];
143                 goutsum -= sir[1];
144                 boutsum -= sir[2];
145 
146                 if (y == 0) {
147                     vmin[x] = Math.min(x + radius + 1, wm);
148                 }
149                 p = pix[yw + vmin[x]];
150 
151                 sir[0] = (p & 0xff0000) >> 16;
152                 sir[1] = (p & 0x00ff00) >> 8;
153                 sir[2] = (p & 0x0000ff);
154 
155                 rinsum += sir[0];
156                 ginsum += sir[1];
157                 binsum += sir[2];
158 
159                 rsum += rinsum;
160                 gsum += ginsum;
161                 bsum += binsum;
162 
163                 stackpointer = (stackpointer + 1) % div;
164                 sir = stack[(stackpointer) % div];
165 
166                 routsum += sir[0];
167                 goutsum += sir[1];
168                 boutsum += sir[2];
169 
170                 rinsum -= sir[0];
171                 ginsum -= sir[1];
172                 binsum -= sir[2];
173 
174                 yi++;
175             }
176             yw += w;
177         }
178         for (x = 0; x < w; x++) {
179             rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0;
180             yp = -radius * w;
181             for (i = -radius; i <= radius; i++) {
182                 yi = Math.max(0, yp) + x;
183 
184                 sir = stack[i + radius];
185 
186                 sir[0] = r[yi];
187                 sir[1] = g[yi];
188                 sir[2] = b[yi];
189 
190                 rbs = r1 - Math.abs(i);
191 
192                 rsum += r[yi] * rbs;
193                 gsum += g[yi] * rbs;
194                 bsum += b[yi] * rbs;
195 
196                 if (i > 0) {
197                     rinsum += sir[0];
198                     ginsum += sir[1];
199                     binsum += sir[2];
200                 } else {
201                     routsum += sir[0];
202                     goutsum += sir[1];
203                     boutsum += sir[2];
204                 }
205 
206                 if (i < hm) {
207                     yp += w;
208                 }
209             }
210             yi = x;
211             stackpointer = radius;
212             for (y = 0; y < h; y++) {
213                 // Preserve alpha channel: ( 0xff000000 & pix[yi] )
214                 pix[yi] = (0xff000000 & pix[yi]) | (dv[rsum] << 16) | (dv[gsum] << 8) | dv[bsum];
215 
216                 rsum -= routsum;
217                 gsum -= goutsum;
218                 bsum -= boutsum;
219 
220                 stackstart = stackpointer - radius + div;
221                 sir = stack[stackstart % div];
222 
223                 routsum -= sir[0];
224                 goutsum -= sir[1];
225                 boutsum -= sir[2];
226 
227                 if (x == 0) {
228                     vmin[y] = Math.min(y + r1, hm) * w;
229                 }
230                 p = x + vmin[y];
231 
232                 sir[0] = r[p];
233                 sir[1] = g[p];
234                 sir[2] = b[p];
235 
236                 rinsum += sir[0];
237                 ginsum += sir[1];
238                 binsum += sir[2];
239 
240                 rsum += rinsum;
241                 gsum += ginsum;
242                 bsum += binsum;
243 
244                 stackpointer = (stackpointer + 1) % div;
245                 sir = stack[stackpointer];
246 
247                 routsum += sir[0];
248                 goutsum += sir[1];
249                 boutsum += sir[2];
250 
251                 rinsum -= sir[0];
252                 ginsum -= sir[1];
253                 binsum -= sir[2];
254 
255                 yi += w;
256             }
257         }
258 
259         Log.e("pix", w + " " + h + " " + pix.length);
260         bitmap.setPixels(pix, 0, w, 0, 0, w, h);
261         return (bitmap);
262     }
263 
264 }