public byte[] getPhotoWithPath(String filePath) {
String SDPath = Environment.getExternalStorageDirectory() + "/";
String path = SDPath + filePath;
// 根据路径获取图片
File mfile = new File(path);
if (mfile.exists()) {// 若该文件存在
Bitmap bmp = BitmapFactory.decodeFile(path);
return decodeBitmap(bmp);
} else {
Log.e("PrintTools_58mm", "the file isn't exists");
}
return null;
}
/**
* print photo in assets 打印assets里的图片
*
* @param 图片在assets目录
* ，如:pic.bmp
* */
public byte[] getPhotoInAssets(Context context, String fileName) {
AssetManager asm = context.getResources().getAssets();
InputStream is;
try {
is = asm.open(fileName);
Bitmap bmp = BitmapFactory.decodeStream(is);
is.close();
if (bmp != null) {
byte[] command = decodeBitmap(bmp);
return command;
} else {
Log.e("PrintTools", "the file isn't exists");
}
} catch (IOException e) {
e.printStackTrace();
Log.e("PrintTools", "the file isn't exists");
}
return null;
}
/**
*
* @param bitmap
* @param widthScale 宽度缩放比例
* @param hightScale 长度缩放比例
* @return
*/
public static Bitmap scale(Bitmap bitmap,float widthScale,float hightScale) {
Matrix matrix = new Matrix();
matrix.postScale(widthScale, hightScale); // 长和宽放大缩小的比例
Bitmap resizeBmp = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(),
bitmap.getHeight(), matrix, true);
return resizeBmp;
}
/** */
/**
* 图片去色,返回灰度图片
*
* @param bmpOriginal 传入的图片
* @return 去色后的图片
*/
public static Bitmap toGrayscale(Bitmap bmpOriginal) {
int width, height;
height = bmpOriginal.getHeight();
width = bmpOriginal.getWidth();
Bitmap bmpGrayscale = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
Canvas c = new Canvas(bmpGrayscale);
Paint paint = new Paint();
ColorMatrix cm = new ColorMatrix();
cm.setSaturation(0);
ColorMatrixColorFilter f = new ColorMatrixColorFilter(cm);
paint.setColorFilter(f);
c.drawBitmap(bmpOriginal, 0, 0, paint);
return bmpGrayscale;
}
/**
* 读取路径中的图片，然后将其转化为缩放后的bitmap
*
* @param path
*/
public static void saveBefore(String path) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
// 获取这个图片的宽和高
Bitmap bitmap = BitmapFactory.decodeFile(path, options); // 此时返回bm为空
options.inJustDecodeBounds = false;
// 计算缩放比
int be = (int)(options.outHeight / (float)200);
if (be <= 0)
be = 1;
options.inSampleSize = 2; // 图片长宽各缩小二分之一
// 重新读入图片，注意这次要把options.inJustDecodeBounds 设为 false哦
bitmap = BitmapFactory.decodeFile(path, options);
int w = bitmap.getWidth();
int h = bitmap.getHeight();
System.out.println(w + " " + h);
// savePNG_After(bitmap,path);
saveJPGE_After(bitmap, path);
}
/**
* 保存图片为PNG
*
* @param bitmap
* @param name
*/
public static void savePNG_After(Bitmap bitmap, String name) {
File file = new File(name);
try {
FileOutputStream out = new FileOutputStream(file);
if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, out)) {
out.flush();
out.close();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 保存图片为JPEG
*
* @param bitmap
* @param path
*/
public static void saveJPGE_After(Bitmap bitmap, String path) {
File file = new File(path);
try {
FileOutputStream out = new FileOutputStream(file);
if (bitmap.compress(Bitmap.CompressFormat.JPEG, 100, out)) {
out.flush();
out.close();
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 水印
*
* @param bitmap
* @return
*/
public static Bitmap createBitmapForWatermark(Bitmap src, Bitmap watermark) {
if (src == null) {
return null;
}
int w = src.getWidth();
int h = src.getHeight();
int ww = watermark.getWidth();
int wh = watermark.getHeight();
// create the new blank bitmap
Bitmap newb = Bitmap.createBitmap(w, h, Config.ARGB_8888);// 创建一个新的和SRC长度宽度一样的位图
Canvas cv = new Canvas(newb);
// draw src into
cv.drawBitmap(src, 0, 0, null);// 在 0，0坐标开始画入src
// draw watermark into
cv.drawBitmap(watermark, w - ww + 5, h - wh + 5, null);// 在src的右下角画入水印
// save all clip
cv.save(Canvas.ALL_SAVE_FLAG);// 保存
// store
cv.restore();// 存储
return newb;
}
/**
* 图片合成
*
* @return
*/
public static Bitmap potoMix(int direction, Bitmap... bitmaps) {
if (bitmaps.length <= 0) {
return null;
}
if (bitmaps.length == 1) {
return bitmaps[0];
}
Bitmap newBitmap = bitmaps[0];
// newBitmap = createBitmapForFotoMix(bitmaps[0],bitmaps[1],direction);
for (int i = 1; i < bitmaps.length; i++) {
newBitmap = createBitmapForFotoMix(newBitmap, bitmaps[i], direction);
}
return newBitmap;
}
private static Bitmap createBitmapForFotoMix(Bitmap first, Bitmap second, int direction) {
if (first == null) {
return null;
}
if (second == null) {
return first;
}
int fw = first.getWidth();
int fh = first.getHeight();
int sw = second.getWidth();
int sh = second.getHeight();
Bitmap newBitmap = null;
if (direction == LEFT) {
newBitmap = Bitmap.createBitmap(fw + sw, fh > sh ? fh : sh, Config.ARGB_8888);
Canvas canvas = new Canvas(newBitmap);
canvas.drawBitmap(first, sw, 0, null);
canvas.drawBitmap(second, 0, 0, null);
} else if (direction == RIGHT) {
newBitmap = Bitmap.createBitmap(fw + sw, fh > sh ? fh : sh, Config.ARGB_8888);
Canvas canvas = new Canvas(newBitmap);
canvas.drawBitmap(first, 0, 0, null);
canvas.drawBitmap(second, fw, 0, null);
} else if (direction == TOP) {
newBitmap = Bitmap.createBitmap(sw > fw ? sw : fw, fh + sh, Config.ARGB_8888);
Canvas canvas = new Canvas(newBitmap);
canvas.drawBitmap(first, 0, sh, null);
canvas.drawBitmap(second, 0, 0, null);
} else if (direction == BOTTOM) {
newBitmap = Bitmap.createBitmap(sw > fw ? sw : fw, fh + sh, Config.ARGB_8888);
Canvas canvas = new Canvas(newBitmap);
canvas.drawBitmap(first, 0, 0, null);
canvas.drawBitmap(second, 0, fh, null);
}
return newBitmap;
}
/**
* 将Bitmap转换成指定大小
* @param bitmap
* @param width
* @param height
* @return
*/
public static Bitmap createBitmapBySize(Bitmap bitmap,int width,int height)
{
return Bitmap.createScaledBitmap(bitmap, width, height, true);
}
/**
* Drawable 转 Bitmap
*
* @param drawable
* @return
*/
public static Bitmap drawableToBitmapByBD(Drawable drawable) {
BitmapDrawable bitmapDrawable = (BitmapDrawable)drawable;
return bitmapDrawable.getBitmap();
}
/**
* Bitmap 转 Drawable
*
* @param bitmap
* @return
*/
public static Drawable bitmapToDrawableByBD(Bitmap bitmap) {
Drawable drawable = new BitmapDrawable(bitmap);
return drawable;
}
/**
* byte[] 转 bitmap
*
* @param b
* @return
*/
public static Bitmap bytesToBimap(byte[] b) {
if (b.length != 0) {
return BitmapFactory.decodeByteArray(b, 0, b.length);
} else {
return null;
}
}
/**
* bitmap 转 byte[]
*
* @param bm
* @return
*/
public static byte[] bitmapToBytes(Bitmap bm) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.PNG, 100, baos);
return baos.toByteArray();
}
}
