android BitmapUtils

import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.URL;import android.content.Context;import android.content.res.AssetManager;import android.graphics.Bitmap;import android.graphics.Bitmap.Config;import android.graphics.BitmapFactory;import android.graphics.Canvas;import android.graphics.LinearGradient;import android.graphics.Matrix;import android.graphics.Paint;import android.graphics.PorterDuff.Mode;import android.graphics.Shader.TileMode;import android.graphics.PorterDuffXfermode;import android.graphics.Rect;import android.graphics.RectF;import android.text.TextUtils;public class BitmapUtils {/** * 根据文件名,从Assets中取图片 *  * @param context * @param fileName *            例如:game_bg.png * @return */public static Bitmap getBitmapFromAsset(Context context, String fileName) {Bitmap bmp = null;if (TextUtils.isEmpty(fileName)) {return null;}AssetManager asm = context.getAssets();if (asm == null) {return bmp;}InputStream is = null;try {is = asm.open(fileName);bmp = BitmapFactory.decodeStream(is);} catch (IOException e) {e.printStackTrace();} finally {try {if (is != null) {is.close();}} catch (IOException e) {e.printStackTrace();}}return bmp;}/** * 根据路径，以流的形式，在sdcard中读取图片 *  * @param filename * @return */public static Bitmap getBitmapFormSdcard(String filename) {if (TextUtils.isEmpty(filename)) {return null;}Bitmap bitmap = null;try {bitmap = BitmapFactory.decodeFile(filename);} catch (OutOfMemoryError e) {if (bitmap != null) {if (!bitmap.isRecycled()) {bitmap.recycle();}bitmap = null;}} catch (Exception e) {if (bitmap != null) {if (!bitmap.isRecycled()) {bitmap.recycle();}bitmap = null;}}return bitmap;}/** * 根据URL下载图片 *  * @param imageUrl *            网络url地址 * @param connectTimeout *            链接超时 * @param readTimeout *            读取超时 * @return */public static Bitmap downloadPic(String imageUrl, int connectTimeout,int readTimeout) {if (TextUtils.isEmpty(imageUrl)) {return null;}URL url = null;HttpURLConnection conn = null;InputStream is = null;Bitmap bitmap = null;try {url = new URL(imageUrl);conn = (HttpURLConnection) url.openConnection();//conn.setConnectTimeout(connectTimeout);//conn.setReadTimeout(readTimeout);conn.setDoInput(true);//conn.connect();is = conn.getInputStream();//bitmap = BitmapFactory.decodeStream(is);} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();} catch (OutOfMemoryError e) {e.printStackTrace();} catch (Exception e) {e.printStackTrace();} finally {if (conn != null) {conn.disconnect();conn = null;}if (is != null) {try {is.close();} catch (IOException e) {e.printStackTrace();} finally {is = null;}}}return bitmap;}/** * 更改bitmap的宽,高 *  * @param bmp * @param targetWidth * @param targetHeight * @return */public static Bitmap resizeBitmap(Bitmap bmp, int targetWidth,int targetHeight) {if (bmp == null || bmp.isRecycled()) {return null;}Bitmap bmResult = null;try {// 原始图片宽度float width = bmp.getWidth();// 原始图片高度float height = bmp.getHeight();Matrix m1 = new Matrix();// 这里指的是目标区域（不是目标图片）m1.postScale(targetWidth / width, targetHeight / height);// 声明位图bmResult = Bitmap.createBitmap(bmp, 0, 0, (int) width,(int) height, m1, true);} catch (Exception e) {if (bmResult != null) {if (!bmResult.isRecycled()) {bmResult.recycle();bmResult = null;}}bmResult = bmp;}return bmResult;}/** * 按某个比例缩放图片 *  * @param bmp * @param ratio * @return */public static Bitmap resizeBitmap(Bitmap bmp, float ratio) {if (bmp == null || bmp.isRecycled()) {return null;}Bitmap bmResult = null;try {// 图片宽度float width = bmp.getWidth();// 图片高度float height = bmp.getHeight();Matrix m1 = new Matrix();m1.postScale(ratio, ratio);// 声明位图bmResult = Bitmap.createBitmap(bmp, 0, 0, (int) width,(int) height, m1, true);} catch (Exception e) {if (bmResult != null) {if (!bmResult.isRecycled()) {bmResult.recycle();bmResult = null;}}bmResult = bmp;}return bmResult;}/** * 将图片存入Sdcard中指定路径 *  * @param bitmap * @param path * @return */public static boolean saveBitmapToSdcard(Bitmap bitmap, String path) {if (bitmap == null || TextUtils.isEmpty(path)) {return false;}File file = null;FileOutputStream fos = null;try {file = new File(path);if (file.exists()) {file.delete();}//fos = new FileOutputStream(file);bitmap.compress(Bitmap.CompressFormat.PNG, 80, fos);fos.flush();return true;} catch (Exception e) {//} finally {if (null != fos) {try {fos.close();} catch (Exception e) {}}}return false;}/** * 处理头像（填充圆角） *  * @param bitmap * @param roundPx * @return */public static Bitmap getCornerBitmap(Bitmap bitmap, float roundPx) {if (bitmap == null) {return null;}Bitmap output = null;try {output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(),Config.ARGB_8888);Canvas canvas = new Canvas(output);final Rect rect = new Rect(0, 0, bitmap.getWidth(),bitmap.getHeight());final RectF rectF = new RectF(rect);final Paint paint = new Paint();paint.setAntiAlias(true);canvas.drawARGB(0, 0, 0, 0);canvas.drawRoundRect(rectF, roundPx, roundPx, paint);paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));canvas.drawBitmap(bitmap, rect, rect, paint);return output;} catch (OutOfMemoryError e) {if (output != null) {if (!output.isRecycled()) {output.recycle();output = null;}}output = bitmap;//e.printStackTrace();}return null;}/** * 镜像效果mirror *  * @param originalImage * @return */public static Bitmap getMirrorImage(Bitmap originalImage) {if (originalImage == null) {return null;}Bitmap bitmapWithReflection = null;try {final int reflectionGap = 2;int width = originalImage.getWidth();int height = originalImage.getHeight();Matrix matrix = new Matrix();matrix.preScale(1, -1);Bitmap reflectionImage = Bitmap.createBitmap(originalImage, 0,height / 2, width, height / 2, matrix, false);bitmapWithReflection = Bitmap.createBitmap(width,(height + height / 6), Config.ARGB_8888);Canvas canvas = new Canvas(bitmapWithReflection);canvas.drawBitmap(originalImage, 0, 0, null);canvas.drawBitmap(reflectionImage, 0, height + reflectionGap, null);Paint paint = new Paint();LinearGradient shader = new LinearGradient(0, height, 0,bitmapWithReflection.getHeight() + reflectionGap + 20,0xffffffff, 0x00ffffff, TileMode.MIRROR);paint.setShader(shader);paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));canvas.drawRect(0, height, width, bitmapWithReflection.getHeight()+ reflectionGap, paint);} catch (OutOfMemoryError e) {if (bitmapWithReflection != null) {if (!bitmapWithReflection.isRecycled()) {bitmapWithReflection.recycle();bitmapWithReflection = null;}}bitmapWithReflection = originalImage;//e.printStackTrace();}return bitmapWithReflection;}/** * Mosaic a bitmap * @param srcBitmap  * @param radius The pixel number of a block. such as width/16 * @param dstBitmap the width and height must be the same of srcBitmap * @return {@link #SUCCESS} or {@value #OUT_OF_BOUNDS_EXCEPTION} */public static boolean mosaic(final Bitmap srcBitmap, final int radius, Bitmap dstBitmap){try {Log.d(TAG, "mosaic srcBitmap = " + srcBitmap + ", radius = " + radius + ", dstBitmap = " + dstBitmap);int w = srcBitmap.getWidth();int h = srcBitmap.getHeight();int[] srcData = new int[w*h];int[] dstData = new int[w*h];int midRadius = radius >> 1;int srcX,srcY;//int[] srcData = srcBitmap.mBuffer;Log.d(TAG, "mosaic:w= " + w + ",h=" +h);long startTime  = System.currentTimeMillis();srcBitmap.getPixels(srcData, 0, w, 0, 0, w, h);for (int j = 0; j < h; j++) {for (int i = 0; i < w; i++) {srcX = i - i%radius + midRadius;srcY = j - j%radius + midRadius;if(srcX >= w){srcX = w-1;}if(srcY >= h){srcY = h-1;}dstData[j*w + i] = srcData[srcY * w + srcX];}}Log.d(TAG, "exe time = " + (System.currentTimeMillis() - startTime));dstBitmap.setPixels(dstData, 0, w, 0, 0, w, h);Log.d(TAG, "setPixels time = " + (System.currentTimeMillis() - startTime));} catch (ArrayIndexOutOfBoundsException e) {// TODO: handle exceptionLog.e(TAG, "ArrayIndexOutOfBoundsException = " + e);return false;}catch (IllegalStateException e) {Log.e(TAG, "IllegalStateException = " + e);return false;}catch (Exception e) {Log.e(TAG, "Exception = " + e);return false;}return true;}/** * Mosaic2 a bitmap. The time cost is 9 times against as mosaic(...),  * but the memory is half of it * @param srcBitmap  * @param radius The pixel number of a block. such as width/16 * @param dstBitmap the width and height must be the same of srcBitmap * @return {@link #SUCCESS} or {@value #OUT_OF_BOUNDS_EXCEPTION} */public static boolean mosaic2(final Bitmap srcBitmap, final int radius, Bitmap dstBitmap){try {Log.d(TAG, "mosaic srcBitmap = " + srcBitmap + ", radius = " + radius + ", dstBitmap = " + dstBitmap);int w = srcBitmap.getWidth();int h = srcBitmap.getHeight();int srcData = 0;//int dstData = 0;int midRadius = radius >> 1;int srcX,srcY;Log.d(TAG, "mosaic:w= " + w + ",h=" +h);long startTime  = System.currentTimeMillis();//srcBitmap.getPixels(srcData, 0, w, 0, 0, w, h);for (int j = 0; j < h; j++) {for (int i = 0; i < w; i++) {srcX = i - i%radius + midRadius;srcY = j - j%radius + midRadius;if(srcX >= w){srcX = w-1;}if(srcY >= h){srcY = h-1;}srcData = srcBitmap.getPixel(srcX, srcY);dstBitmap.setPixel(i, j, srcData);//dstData[j*w + i] = srcData[srcY * w + srcX];}}Log.d(TAG, "exe time = " + (System.currentTimeMillis() - startTime));//dstBitmap.setPixels(dstData, 0, w, 0, 0, w, h);//Log.d(TAG, "setPixels time = " + (System.currentTimeMillis() - startTime));} catch (ArrayIndexOutOfBoundsException e) {// TODO: handle exceptionLog.e(TAG, "ArrayIndexOutOfBoundsException = " + e);return false;}catch (IllegalStateException e) {Log.e(TAG, "IllegalStateException = " + e);return false;}catch (Exception e) {Log.e(TAG, "Exception = " + e);return false;}return true;}    /**     * 设置 ImageView 图标颜色     */    public void setImageViewColorFilter(ImageView view, int color) {        if (view == null)            return;        view.setColorFilter(view.getContext().getResources().getColor(color));    }    /**     * 获取 指定颜色 的图标     *     * @param context     * @param resID     * @return     */    public Drawable getThemeDrawableColorFilter(Context context, int resID, int color) {        Drawable drawable = null;        try {            drawable = context.getResources().getDrawable(resID);            drawable.setColorFilter(context.getResources().getColor(color), PorterDuff.Mode.SRC_ATOP);        } catch (Exception | OutOfMemoryError error) {            error.printStackTrace();        }        if (drawable == null) {            return new ColorDrawable(Color.TRANSPARENT);        } else {            return drawable;        }    }}
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