Activity悬浮于另一个Activity之上
2016-11-19 15:48
120 查看
1.获取前一个Activity的界面
2.将获取到的界面转化为Bitmap
3.去掉标题栏和状态栏
4.将Bitmap传递到后一个Activity中(Bitma过大,需转化为String或者byte[]传递)
5.设置背景
private Bitmap applyBlur() {
View view = getWindow().getDecorView();
view.setDrawingCacheEnabled(true);
view.buildDrawingCache(true);
/**
* 获取当前窗口快照,相当于截屏
*/
Bitmap bmp1 = view.getDrawingCache();
int height = getOtherHeight();
/**
* 除去状态栏和标题栏
*/
Bitmap bmp2 = Bitmap.createBitmap(bmp1, 0, height, bmp1.getWidth(),
bmp1.getHeight() - height);
return bmp2;
}
2.将获取到的界面转化为Bitmap
3.去掉标题栏和状态栏
4.将Bitmap传递到后一个Activity中(Bitma过大,需转化为String或者byte[]传递)
5.设置背景
private Bitmap applyBlur() {
View view = getWindow().getDecorView();
view.setDrawingCacheEnabled(true);
view.buildDrawingCache(true);
/**
* 获取当前窗口快照,相当于截屏
*/
Bitmap bmp1 = view.getDrawingCache();
int height = getOtherHeight();
/**
* 除去状态栏和标题栏
*/
Bitmap bmp2 = Bitmap.createBitmap(bmp1, 0, height, bmp1.getWidth(),
bmp1.getHeight() - height);
return bmp2;
}
Bitmap bitmap = applyBlur(); ByteArrayOutputStream baos = new ByteArrayOutputStream(); bitmap.compress(CompressFormat.PNG, 50,baos); String imageBase64 = new String (Base64.encode(baos.toByteArray(), 0)); intent = new Intent(this, MusicSearchActivity.class); intent.putExtra("bitmap", imageBase64); startActivity(intent);
String imageBase64 = getIntent().getStringExtra("bitmap"); byte[] byte64 = Base64.decode(imageBase64, 0); ByteArrayInputStream bais = new ByteArrayInputStream(byte64); bitmap = BitmapFactory.decodeStream(bais);
private void blur(Bitmap bkg, View view) { long startMs = System.currentTimeMillis(); float scaleFactor = 8;// 图片缩放比例; float radius = 10;// 模糊程度,值越大越模糊 Bitmap overlay = Bitmap.createBitmap( (int) (view.getMeasuredWidth() / scaleFactor), (int) (view.getMeasuredHeight() / scaleFactor), Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(overlay); canvas.translate(-view.getLeft() / scaleFactor, -view.getTop() / scaleFactor); canvas.scale(1 / scaleFactor, 1 / scaleFactor); Paint paint = new Paint(); paint.setFlags(Paint.FILTER_BITMAP_FLAG); canvas.drawBitmap(bkg, 0, 0, paint); overlay = FastBlur.doBlur(overlay, (int) radius, true); view.setBackground(new BitmapDrawable(getResources(), overlay)); }
package com.it2.dooya.music; import android.graphics.Bitmap; public class FastBlur { public static Bitmap doBlur(Bitmap sentBitmap, int radius, boolean canReuseInBitmap) { Bitmap bitmap; if (canReuseInBitmap) { bitmap = sentBitmap; } else { bitmap = sentBitmap.copy(sentBitmap.getConfig(), true); } if (radius < 1) { return (null); } int w = bitmap.getWidth(); int h = bitmap.getHeight(); int[] pix = new int[w * h]; bitmap.getPixels(pix, 0, w, 0, 0, w, h); int wm = w - 1; int hm = h - 1; int wh = w * h; int div = radius + radius + 1; int r[] = new int[wh]; int g[] = new int[wh]; int b[] = new int[wh]; int rsum, gsum, bsum, x, y, i, p, yp, yi, yw; int vmin[] = new int[Math.max(w, h)]; int divsum = (div + 1) >> 1; divsum *= divsum; int dv[] = new int[256 * divsum]; for (i = 0; i < 256 * divsum; i++) { dv[i] = (i / divsum); } yw = yi = 0; int[][] stack = new int[div][3]; int stackpointer; int stackstart; int[] sir; int rbs; int r1 = radius + 1; int routsum, goutsum, boutsum; int rinsum, ginsum, binsum; for (y = 0; y < h; y++) { rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0; for (i = -radius; i <= radius; i++) { p = pix[yi + Math.min(wm, Math.max(i, 0))]; sir = stack[i + radius]; sir[0] = (p & 0xff0000) >> 16; sir[1] = (p & 0x00ff00) >> 8; sir[2] = (p & 0x0000ff); rbs = r1 - Math.abs(i); rsum += sir[0] * rbs; gsum += sir[1] * rbs; bsum += sir[2] * rbs; if (i > 0) { rinsum += sir[0]; ginsum += sir[1]; binsum += sir[2]; } else { routsum += sir[0]; goutsum += sir[1]; boutsum += sir[2]; } } stackpointer = radius; for (x = 0; x < w; x++) { r[yi] = dv[rsum]; g[yi] = dv[gsum]; b[yi] = dv[bsum]; rsum -= routsum; gsum -= goutsum; bsum -= boutsum; stackstart = stackpointer - radius + div; sir = stack[stackstart % div]; routsum -= sir[0]; goutsum -= sir[1]; boutsum -= sir[2]; if (y == 0) { vmin[x] = Math.min(x + radius + 1, wm); } p = pix[yw + vmin[x]]; sir[0] = (p & 0xff0000) >> 16; sir[1] = (p & 0x00ff00) >> 8; sir[2] = (p & 0x0000ff); rinsum += sir[0]; ginsum += sir[1]; binsum += sir[2]; rsum += rinsum; gsum += ginsum; bsum += binsum; stackpointer = (stackpointer + 1) % div; sir = stack[(stackpointer) % div]; routsum += sir[0]; goutsum += sir[1]; boutsum += sir[2]; rinsum -= sir[0]; ginsum -= sir[1]; binsum -= sir[2]; yi++; } yw += w; } for (x = 0; x < w; x++) { rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0; yp = -radius * w; for (i = -radius; i <= radius; i++) { yi = Math.max(0, yp) + x; sir = stack[i + radius]; sir[0] = r[yi]; sir[1] = g[yi]; sir[2] = b[yi]; rbs = r1 - Math.abs(i); rsum += r[yi] * rbs; gsum += g[yi] * rbs; bsum += b[yi] * rbs; if (i > 0) { rinsum += sir[0]; ginsum += sir[1]; binsum += sir[2]; } else { routsum += sir[0]; goutsum += sir[1]; boutsum += sir[2]; } if (i < hm) { yp += w; } } yi = x; stackpointer = radius; for (y = 0; y < h; y++) { // Preserve alpha channel: ( 0xff000000 & pix[yi] ) pix[yi] = (0xff000000 & pix[yi]) | (dv[rsum] << 16) | (dv[gsum] << 8) | dv[bsum]; rsum -= routsum; gsum -= goutsum; bsum -= boutsum; stackstart = stackpointer - radius + div; sir = stack[stackstart % div]; routsum -= sir[0]; goutsum -= sir[1]; boutsum -= sir[2]; if (x == 0) { vmin[y] = Math.min(y + r1, hm) * w; } p = x + vmin[y]; sir[0] = r[p]; sir[1] = g[p]; sir[2] = b[p]; rinsum += sir[0]; ginsum += sir[1]; binsum += sir[2]; rsum += rinsum; gsum += ginsum; bsum += binsum; stackpointer = (stackpointer + 1) % div; sir = stack[stackpointer]; routsum += sir[0]; goutsum += sir[1]; boutsum += sir[2]; rinsum -= sir[0]; ginsum -= sir[1]; binsum -= sir[2]; yi += w; } } bitmap.setPixels(pix, 0, w, 0, 0, w, h); return (bitmap); } }
相关文章推荐
- 一个activity悬浮在另一个activity上,背景透明化效果
- 将一个activity以对话框的形式悬浮在另一个activity之上
- android在一个activity关闭另一个activity
- 想在另一个Activity里打开这个Activity,但这之前的原来那个Activity还存在,结束掉那个Activity
- 从一个activity跳转到另一个activity,利用intent传递数据
- 从一个activity回退到另一个activity并返回值
- 一个Activity 写另一个activity
- Android 启动另一个App/apk中的Activity实现代码
- Android开发中在一个Activity中关闭另一个Activity
- 由一个activity跳转到另一个activity
- Android开发(一、初窥安卓--5.启动另一个 Activity)
- 启动另一个Activity
- 如何让某个view悬浮在其他界面之上?
- 从activity向另一个activity中的fragment传值
- 第69章、初识Intent-打开另一个Activity:单向传值(从零开始学Android)
- Intent传递数据从一个Activity到另一个Activity
- TextView中添加链接,点击启动另一个Activity
- 如何启动另一个Activity
- 如何在Activity中启动另一个Activity与Activity之间值传递
- 在实现了slidingmenu的MainActivity中添加一个Button实现主activity到另一个activity的跳转,程序无法运行