view存成bitmap 

  1.     public static String saveView2Bitmap(Context context,View view,String fileName) {
  2.         Bitmap bitmap = null;
  4.         if(context == null || view == null || TextUtils.isEmpty(fileName)){
  5.             return null;
  6.         }
  8.         view.setDrawingCacheEnabled(true);
  9. //        view.measure(View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED), View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
  10.         view.buildDrawingCache();
  11.         bitmap = view.getDrawingCache();
  13.         if(bitmap == null){
  14.             Toast.makeText(context,context.getString(R.string.wallpaper_failed_to_crop),Toast.LENGTH_SHORT).show();
  15.             return null;
  16.         }
  19.         String ret = null;
  20.         OutputStream fos = null;
  21.         try {
  23.             Bitmap resizeBitmap = zoomBitmap(bitmap,0.5f,0.5f);
  24.             bitmap.recycle();
  25.             Uri uri =  Uri.fromFile(new File(WallpaperSettingUtils.getTempSaveDir() + fileName));
  26.             File file = new File(uri.getPath());
  27.             if (!file.exists()) {
  28.                 try {
  29.                     file.createNewFile();
  30.                 } catch (IOException e) {
  31.                     Toast.makeText(context,context.getString(R.string.wallpaper_failed_to_crop),Toast.LENGTH_SHORT).show();
  32.                     return null;
  33.                 }
  34.             }
  35.             fos = context.getContentResolver().openOutputStream(uri);
  36.             // 这里也可以是 Bitmap.CompressFormat.PNG, 可以保持透明背景
  37.             resizeBitmap.compress(Bitmap.CompressFormat.JPEG, 80, fos);
  38.             ret = WallpaperSettingUtils.getTempSaveDir() + fileName;
  39.         } catch (Exception e) {
  40.             Toast.makeText(context,context.getString(R.string.wallpaper_failed_to_crop),Toast.LENGTH_SHORT).show();
  41.         }finally {
  42.             Util.closeSilently(fos);
  43.             view.setDrawingCacheEnabled(false);
  44.         }
  45.         return ret;
  46.     }
  48.     /**
  49.      * 将图片按指定比例缩放
  50.      */
  51.     public static Bitmap zoomBitmap(Bitmap bitmap, float scaleWidth, float scaleHeight) {
  52.         int width = bitmap.getWidth();
  53.         int height = bitmap.getHeight();
  54.         Matrix matrix = new Matrix();
  55. //        float scaleWidth = ((float) w / width);
  56. //        float scaleHeight = ((float) h / height);
  57.         matrix.postScale(scaleWidth, scaleHeight);
  58.         Bitmap newBitmap = Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true);
  59.         return newBitmap;
  60.     }
  62.     public static Bitmap convertViewToBitmap(View view){
  63.         view.measure(View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED), View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
  64.         view.buildDrawingCache();
  65.         Bitmap bitmap = view.getDrawingCache();
  66.         return bitmap;
  67.     }
  69. //---------------------
  70.     public static String saveView2BitmapWithoutZoom(Context context,View view,String fileName) {
  71.         Bitmap bitmap = null;
  72.         if(context == null || view == null || TextUtils.isEmpty(fileName)){
  73.             return null;
  74.         }
  75.         view.setDrawingCacheEnabled(true);
  76.         view.buildDrawingCache();
  77.         bitmap = view.getDrawingCache();
  78.         if(bitmap == null){
  79.             Toast.makeText(context,context.getString(R.string.wallpaper_failed_to_crop),Toast.LENGTH_SHORT).show();
  80.             return null;
  81.         }
  82.         String ret = null;
  83.         OutputStream fos = null;
  84.         try {
  85.             Uri uri =  Uri.fromFile(new File(WallpaperSettingUtils.getTempSaveDir() + fileName));
  86.             File file = new File(uri.getPath());
  87.             if (!file.exists()) {
  88.                 try {
  89.                     file.createNewFile();
  90.                 } catch (IOException e) {
  91.                     Toast.makeText(context,context.getString(R.string.wallpaper_failed_to_crop),Toast.LENGTH_SHORT).show();
  92.                     return null;
  93.                 }
  94.             }
  95.             fos = context.getContentResolver().openOutputStream(uri);
  96.             bitmap.compress(Bitmap.CompressFormat.PNG, 100, fos);
  97.             ret = WallpaperSettingUtils.getTempSaveDir() + fileName;
  98.         } catch (Exception e) {
  99.             Toast.makeText(context,context.getString(R.string.wallpaper_failed_to_crop),Toast.LENGTH_SHORT).show();
  100.         }finally {
  101.             Util.closeSilently(fos);
  102.             view.destroyDrawingCache();
  103.             view.setDrawingCacheEnabled(false);
  104.             bitmap.recycle();
  105.         }
  106.         return ret;
  107.     }





posted @ 2016-10-01 16:26  杨伟乔  阅读(250)  评论(0)    收藏  举报