android bitmap缩放失真,Android处理Bitmap使其能够不失真等比缩放裁剪后显示在ImageView上...

最新推荐文章于 2023-05-08 15:12:24 发布

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最新推荐文章于 2023-05-08 15:12:24 发布

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文章标签： android bitmap缩放失真

该代码段展示了如何根据ImageView的尺寸，创建并返回适应的Bitmap对象。通过比较Bitmap原始尺寸与目标尺寸，分别调用不同的方法进行缩放裁剪，确保Bitmap在ImageView中正确显示。主要涉及Bitmap的缩放和裁剪操作。

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1 /**

2 * 获取正确缩放裁剪适应IamgeView的Bitmap3 *@paramimageView4 *@parambitmap5 *@return

6 */

7 public staticBitmap createFitBitmap(ImageView imageView, Bitmap bitmap) {8 Log.i(TAG, "createFitBitmap= widthTarget && heightBitmap >=heightTarget ){19 result =createLargeToSmallBitmap(widthBitmap, heightBitmap, widthTarget, heightTarget, bitmap);20 }21 else if( widthBitmap >= widthTarget && heightBitmap =heightTarget ){26 Bitmap temp =createLargeHeightToEqualWidthBitmap(widthBitmap, heightBitmap, widthTarget, heightTarget, bitmap);27 result =createLargeToSmallBitmap(temp.getWidth(), temp.getHeight(), widthTarget, heightTarget, temp);28 }29 else{30 Bitmap temp =createSmallToEqualBitmap(widthBitmap, heightBitmap, widthTarget, heightTarget, bitmap);31 result =createFitBitmap(imageView, temp);32 }33 Log.i(TAG, "createFitBitmap--------------------->");34 returnresult;35 }36

39 private static Bitmap createLargeToSmallBitmap( int widthBitmap, int heightBitmap, int widthTarget, intheightTarget, Bitmap bitmap){40 Log.i(TAG, "createLargeToSmallBitmap");48 returnBitmap.createBitmap(bitmap, x, y, widthTarget, heightTarget);49 }50

51 private static Bitmap createLargeWidthToEqualHeightBitmap(int widthBitmap, int heightBitmap, int widthTarget, intheightTarget, Bitmap bitmap){52

53 Log.i(TAG, "createLargeWidthToEqualHeightBitmap");60 return Bitmap.createScaledBitmap(bitmap, (int)(widthBitmap * scale) , heightTarget, false);61 }62

63 private static Bitmap createLargeHeightToEqualWidthBitmap(int widthBitmap, int heightBitmap, int widthTarget, intheightTarget, Bitmap bitmap){64

65 Log.i(TAG, "createLargeHeightToEqualWidthBitmap");72 return Bitmap.createScaledBitmap(bitmap, widthTarget , (int)(heightTarget * scale), false);73 }74

75 private static Bitmap createSmallToEqualBitmap(int widthBitmap, int heightBitmap, int widthTarget, intheightTarget, Bitmap bitmap){76

77 Log.i(TAG, "createSmallToEqualBitmap");86 return Bitmap.createScaledBitmap(bitmap, (int)(widthBitmap * scale), (int)(heightBitmap * scale), false);87 }