BitmapManager
package com.k1.media; import java.io.IOException; import java.io.InputStream; import android.app.Activity; import android.content.Context; import android.content.res.AssetManager; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.PorterDuff; import android.graphics.PorterDuffXfermode; import android.graphics.Rect; import android.graphics.RectF; public class BitmapManager {
//从assets中读取图片 public static Bitmap getImageFromAssetsFile(Context context, String fileName) { String url = "PhonePage/image/"; Bitmap image = null; AssetManager am = context.getResources().getAssets(); try { InputStream is = am.open(url + fileName + ".png"); image = BitmapFactory.decodeStream(is); is.close(); } catch (IOException e) { e.printStackTrace(); } return image; } //设置圆形图片 public static Bitmap makeRoundCorner(Bitmap bitmap) { int width = bitmap.getWidth(); int height = bitmap.getHeight(); int left = 0, top = 0, right = width, bottom = height; float roundPx = height / 2; if (width > height) { left = (width - height) / 2; top = 0; right = left + height; bottom = height; } else if (height > width) { left = 0; top = (height - width) / 2; right = width; bottom = top + width; roundPx = width / 2; } Bitmap output = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(output); int color = 0xff424242; Paint paint = new Paint(); Rect rect = new Rect(left, top, right, bottom); RectF rectF = new RectF(rect); paint.setAntiAlias(true); canvas.drawARGB(0, 0, 0, 0); paint.setColor(color); canvas.drawRoundRect(rectF, roundPx, roundPx, paint); paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN)); canvas.drawBitmap(bitmap, rect, rect, paint); return output; } }