Android 图片Bitmap的剪切的示例代码

import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.util.ArrayList; import android.content.Context; import android.graphics.Bitmap; import android.graphics.Bitmap.Config; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.PorterDuff; import android.graphics.PorterDuff.Mode; import android.graphics.PorterDuffXfermode; import android.graphics.Rect; import android.graphics.RectF;  public class BitmapCut {   /**  * 通过资源id转化成Bitmap  *  * @param context  * @param resId  * @return  */  public static Bitmap ReadBitmapById(Context context, int resId)  {  BitmapFactory.Options opt = new BitmapFactory.Options();  opt.inPreferredConfig = Bitmap.Config.RGB_565;  opt.inPurgeable = true;  opt.inInputShareable = true;   InputStream is = context.getResources().openRawResource(resId);  return BitmapFactory.decodeStream(is, null, opt);  }   /**  * 设置背景为圆角  *  * @param bitmap  * @param pixels  * @return  */  public static Bitmap removeYuanjiao(Bitmap bitmap, int pixels)  {  int width = bitmap.getWidth();  int height = bitmap.getHeight();   Bitmap creBitmap = Bitmap.createBitmap(width, height,   android.graphics.Bitmap.Config.ARGB_8888);  Canvas canvas = new Canvas(creBitmap);   Paint paint = new Paint();  float roundPx = pixels;  RectF rectF = new RectF(0, 0, bitmap.getWidth() - pixels,   bitmap.getHeight() - pixels);  paint.setAntiAlias(true);   canvas.drawARGB(0, 0, 0, 0);  canvas.drawRoundRect(rectF, roundPx, roundPx, paint);  paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));   canvas.drawBitmap(bitmap, 0, 0, paint);  if (!bitmap.isRecycled())   bitmap.recycle();   return creBitmap;  }   /**  * 按正方形裁切图片  */  public static Bitmap ImageCrop(Bitmap bitmap, boolean isRecycled)  {   if (bitmap == null)  {   return null;  }   int w = bitmap.getWidth(); // 得到图片的宽，高  int h = bitmap.getHeight();   int wh = w > h ? h : w;// 裁切后所取的正方形区域边长   int retX = w > h ? (w - h) / 2 : 0;// 基于原图，取正方形左上角x坐标  int retY = w > h ? 0 : (h - w) / 2;   Bitmap bmp = Bitmap.createBitmap(bitmap, retX, retY, wh, wh, null,   false);  if (isRecycled && bitmap != null && !bitmap.equals(bmp)   && !bitmap.isRecycled())  {   bitmap.recycle();   bitmap = null;  }   // 下面这句是关键  return bmp;// Bitmap.createBitmap(bitmap, retX, retY, wh, wh, null,    // false);  }   /**  * 按长方形裁切图片  *  * @param bitmap  * @return  */  public static Bitmap ImageCropWithRect(Bitmap bitmap)  {  if (bitmap == null)  {   return null;  }   int w = bitmap.getWidth(); // 得到图片的宽，高  int h = bitmap.getHeight();   int nw, nh, retX, retY;  if (w > h)  {   nw = h / 2;   nh = h;   retX = (w - nw) / 2;   retY = 0;  } else  {   nw = w / 2;   nh = w;   retX = w / 4;   retY = (h - w) / 2;  }   // 下面这句是关键  Bitmap bmp = Bitmap.createBitmap(bitmap, retX, retY, nw, nh, null,   false);  if (bitmap != null && !bitmap.equals(bmp) && !bitmap.isRecycled())  {   bitmap.recycle();   bitmap = null;  }  return bmp;// Bitmap.createBitmap(bitmap, retX, retY, nw, nh, null,    // false);  }   /**  * Bitmap --> byte[]  *  * @param bmp  * @return  */  public static byte[] readBitmap(Bitmap bmp)  {  ByteArrayOutputStream baos = new ByteArrayOutputStream();  bmp.compress(Bitmap.CompressFormat.JPEG, 60, baos);  try  {   baos.flush();   baos.close();  } catch (IOException e)  {   e.printStackTrace();  }  return baos.toByteArray();  }    /**  * 将图像裁剪成圆形  *  * @param bitmap  * @return  */  public static Bitmap toRoundBitmap(Bitmap bitmap)  {  if (bitmap == null)  {   return null;  }   int width = bitmap.getWidth();  int height = bitmap.getHeight();  float roundPx;  float left, top, right, bottom, dst_left, dst_top, dst_right, dst_bottom;  if (width <= height)  {   roundPx = width / 2;   top = 0;   bottom = width;   left = 0;   right = width;   height = width;   dst_left = 0;   dst_top = 0;   dst_right = width;   dst_bottom = width;  } else  {   roundPx = height / 2;   float clip = (width - height) / 2;   left = clip;   right = width - clip;   top = 0;   bottom = height;   width = height;   dst_left = 0;   dst_top = 0;   dst_right = height;   dst_bottom = height;  }   Bitmap output = Bitmap.createBitmap(width, height, Config.ARGB_8888);  Canvas canvas = new Canvas(output);   final int color = 0xff424242;  final Paint paint = new Paint();  final Rect src = new Rect((int) left, (int) top, (int) right,   (int) bottom);  final Rect dst = new Rect((int) dst_left, (int) dst_top,   (int) dst_right, (int) dst_bottom);  final RectF rectF = new RectF(dst);   paint.setAntiAlias(true);   canvas.drawARGB(0, 0, 0, 0);  paint.setColor(color);  canvas.drawRoundRect(rectF, roundPx, roundPx, paint);   paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));  canvas.drawBitmap(bitmap, src, dst, paint);  if (bitmap != null && !bitmap.isRecycled())  {   bitmap.recycle();   bitmap = null;  }  return output;  }   // 将图片变成带圆边的圆形图片  public static Bitmap getRoundBitmap(Bitmap bitmap, int width, int height)  {  if (bitmap == null)  {   return null;  }  // 将图片变成圆角  Bitmap roundBitmap = Bitmap.createBitmap(width, height,   Config.ARGB_8888);  Canvas canvas = new Canvas(roundBitmap);  Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);  int len = (width > height) ? height : width;  canvas.drawCircle(width / 2, height / 2, len / 2 - 8, paint);  paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));  Bitmap scaledBitmap = Bitmap.createScaledBitmap(bitmap, len, len, true);  canvas.drawBitmap(scaledBitmap, 0, 0, paint);  // 将图片加圆边  Bitmap outBitmap = Bitmap.createBitmap(width, height, Config.ARGB_8888);  canvas = new Canvas(outBitmap);  paint = new Paint(Paint.ANTI_ALIAS_FLAG);  paint.setColor(0xffffffff);  canvas.drawCircle(width / 2, height / 2, len / 2 - 4, paint);  paint.setXfermode(new PorterDuffXfermode(Mode.SRC_OVER));  canvas.drawBitmap(roundBitmap, 0, 0, paint);  bitmap.recycle();  bitmap = null;  roundBitmap.recycle();  roundBitmap = null;  scaledBitmap.recycle();  scaledBitmap = null;  return outBitmap;  }   // 将图片变成带圆边的圆形图片  public static Bitmap getRoundBitmap(Bitmap bitmap, int width, int height,   int color)  {  if (bitmap == null)  {   return null;  }  // 将图片变成圆角  Bitmap roundBitmap = Bitmap.createBitmap(width, height,   Config.ARGB_8888);  Canvas canvas = new Canvas(roundBitmap);  Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);  int len = (width > height) ? height : width;  canvas.drawCircle(width / 2, height / 2, len / 2 - 8, paint);  paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));  Bitmap scaledBitmap = Bitmap.createScaledBitmap(bitmap, len, len, true);  canvas.drawBitmap(scaledBitmap, 0, 0, paint);  // 将图片加圆边  Bitmap outBitmap = Bitmap.createBitmap(width, height, Config.ARGB_8888);  canvas = new Canvas(outBitmap);  paint = new Paint(Paint.ANTI_ALIAS_FLAG);  paint.setColor(color);  canvas.drawCircle(width / 2, height / 2, len / 2 - 4, paint);  paint.setXfermode(new PorterDuffXfermode(Mode.SRC_OVER));  canvas.drawBitmap(roundBitmap, 0, 0, paint);  bitmap.recycle();  bitmap = null;  roundBitmap.recycle();  roundBitmap = null;  scaledBitmap.recycle();  scaledBitmap = null;  return outBitmap;  }   /**  * function:图片转圆角  *  * @param bitmap  *  需要转的bitmap  * @param pixels  *  转圆角的弧度  * @return 转圆角的bitmap  */  public static Bitmap toRoundCorner(Bitmap bitmap, int pixels)  {  Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),   bitmap.getHeight(), Config.ARGB_8888);  Canvas canvas = new Canvas(output);  final int color = 0xff424242;  final Paint paint = new Paint();  final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());  final RectF rectF = new RectF(rect);  final float roundPx = pixels;  paint.setAntiAlias(true);  canvas.drawARGB(0, 0, 0, 0);  paint.setColor(color);  canvas.drawRoundRect(rectF, roundPx, roundPx, paint);  paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));  canvas.drawBitmap(bitmap, rect, rect, paint);  if (bitmap != null && !bitmap.isRecycled())  {   bitmap.recycle();  }  return output;  }   /**  * 获取指定的圆角图片  *  * @param bitmap  * @return  */  public static Bitmap getRadiusBitmap(Bitmap bitmap)  {  Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);  paint.setColor(0xffffffff);  Bitmap radiusBitmap = Bitmap.createBitmap(bitmap.getWidth(),   bitmap.getHeight(), Config.ARGB_8888);  Canvas canvas = new Canvas(radiusBitmap);  RectF rectF = new RectF(0, 0, bitmap.getWidth(), bitmap.getHeight());  canvas.drawRoundRect(rectF, 7, 7, paint);  paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));  canvas.drawBitmap(bitmap, 0, 0, paint);  if (bitmap != null && !bitmap.isRecycled())  {   bitmap.recycle();  }  return radiusBitmap;  }   // 获得指定大小的圆边的bitmap数组  public static ArrayList<Bitmap> getRadiusBitmapList(String[] pathArray,   int size, int len, float radius, int color)  {  Bitmap canvasBitmap = null;  Canvas canvas = null;  Paint paint = null;  RectF rectF = new RectF(0, 0, len - radius, len - radius);  File file = null;  FileInputStream fis = null;  Bitmap bitmap = null;  Bitmap scaledBitmap = null;   ArrayList<Bitmap> list = new ArrayList<Bitmap>();  for (int i = 0; i < pathArray.length; i++)  {   file = new File(pathArray[i]);   if (!file.exists())   continue;   try   {   fis = new FileInputStream(file);   bitmap = BitmapFactory.decodeStream(fis);   if (bitmap != null)   {    canvasBitmap = Bitmap.createBitmap(len, len,     Config.ARGB_8888);    canvas = new Canvas(canvasBitmap);    paint = new Paint(Paint.ANTI_ALIAS_FLAG);    paint.setColor(color);    canvas.drawRoundRect(rectF, radius, radius, paint);    paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));     scaledBitmap = Bitmap.createScaledBitmap(bitmap, len, len,     true);    canvas.drawBitmap(scaledBitmap, 0, 0, paint);    list.add(canvasBitmap);   }   } catch (FileNotFoundException e)   {   } finally   {   if (fis != null)   {    try    {    fis.close();    } catch (IOException e1)    {    }   }   }   if (list.size() == size)   break;  }  if (scaledBitmap != null && !scaledBitmap.isRecycled())  {   scaledBitmap.recycle();   scaledBitmap = null;  }  if (bitmap != null && !bitmap.isRecycled())  {   bitmap.recycle();   bitmap = null;  }  return list;  }   /**  * 按照一定的宽高比例裁剪图片  *  * @param bitmap  * @param num1  *  长边的比例  * @param num2  *  短边的比例  * @return  */  public static Bitmap ImageCrop(Bitmap bitmap, int num1, int num2,   boolean isRecycled)  {  if (bitmap == null)  {   return null;  }  int w = bitmap.getWidth(); // 得到图片的宽，高  int h = bitmap.getHeight();  int retX, retY;  int nw, nh;  if (w > h)  {   if (h > w * num2 / num1)   {   nw = w;   nh = w * num2 / num1;   retX = 0;   retY = (h - nh) / 2;   } else   {   nw = h * num1 / num2;   nh = h;   retX = (w - nw) / 2;   retY = 0;   }  } else  {   if (w > h * num2 / num1)   {   nh = h;   nw = h * num2 / num1;   retY = 0;   retX = (w - nw) / 2;   } else   {   nh = w * num1 / num2;   nw = w;   retY = (h - nh) / 2;   retX = 0;   }  }  Bitmap bmp = Bitmap.createBitmap(bitmap, retX, retY, nw, nh, null,   false);  if (isRecycled && bitmap != null && !bitmap.equals(bmp)   && !bitmap.isRecycled())  {   bitmap.recycle();   bitmap = null;  }  return bmp;// Bitmap.createBitmap(bitmap, retX, retY, nw, nh, null,    // false);  } }