import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;
import android.graphics.Paint;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Bitmap.Config;
import android.graphics.PorterDuff.Mode;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
/*
*
* 处理图片的工具类.
*/
public
class p_w_picpathTool {
public
static final
int LEFT =
0;
public
static final
int RIGHT =
1;
public
static final
int TOP =
3;
public
static final
int BOTTOM =
4;
/*
*
*/
/*
*
* 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;
}
/*
*
*/
/*
*
* 去色同时加圆角
*
* @param bmpOriginal
* 原图
* @param pixels
* 圆角弧度
* @return 修改后的图片
*/
public
static Bitmap toGrayscale(Bitmap bmpOriginal,
int pixels) {
return toRoundCorner(toGrayscale(bmpOriginal), pixels);
}
/*
*
*/
/*
*
* 把图片变成圆角
*
* @param bitmap
* 须要修改的图片
* @param pixels
* 圆角的弧度
* @return 圆角图片
*/
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);
return output;
}
/*
*
*/
/*
*
* 使圆角功能支持BitampDrawable
*
* @param bitmapDrawable
* @param pixels
* @return
*/
public
static BitmapDrawable toRoundCorner(BitmapDrawable bitmapDrawable,
int pixels) {
Bitmap bitmap = bitmapDrawable.getBitmap();
bitmapDrawable =
new BitmapDrawable(toRoundCorner(bitmap, pixels));
return bitmapDrawable;
}
/*
*
* 读取路径中的图片,而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
//
从新读入图片,注意此次要把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);
//
建立一个新的和SRC长度宽度同样的位图
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(); } }