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PicUtils.java

package com . lfk . justwetools . Utils ;

import android . app . Activity ;

import android . content . Context ;

import android . content . res . Resources ;

import android . content . res . TypedArray ;

import android . graphics . Bitmap ;

import android . graphics . BitmapFactory ;

import android . graphics . BitmapShader ;

import android . graphics . Canvas ;

import android . graphics . Color ;

import android . graphics . LinearGradient ;

import android . graphics . Matrix ;

import android . graphics . Paint ;

import android . graphics . PixelFormat ;

import android . graphics . PorterDuff ;

import android . graphics . PorterDuffXfermode ;

import android . graphics . Rect ;

import android . graphics . RectF ;

import android . graphics . Shader ;

import android . graphics . drawable . BitmapDrawable ;

import android . graphics . drawable . Drawable ;

import android . util . Base64 ;

import android . view . Display ;

import android . view . View ;

import android . view . WindowManager ;

import android . widget . ScrollView ;

import java . io . ByteArrayInputStream ;

import java . io . ByteArrayOutputStream ;

import java . io . InputStream ;

import java . net . HttpURLConnection ;

import java . net . URL ;

import java . util . ArrayList ;

import java . util . List ;

/**

* 图片处理工具类

* @author liufengkai

public class PicUtils {

/**

* 将Bitmap转换成字符串

* @param bitmap 传入图片的bitmap

* @return String

public static String bitmapToString ( Bitmap bitmap ) {

String bitmapString = null ;

ByteArrayOutputStream bStream = new ByteArrayOutputStream ();

bitmap . compress ( Bitmap . CompressFormat . PNG , 100 , bStream );

byte [] bytes = bStream . toByteArray ();

bitmapString = Base64 . encodeToString ( bytes , Base64 . DEFAULT );

return bitmapString ;

}

/**

* 将字符串转换成Bitmap类型

* @param string 传入图片转出的字符串

* @return Bitmap

public static Bitmap stringToBitmap ( String string ) {

Bitmap bitmap = null ;

try {

byte [] bitmapArray ;

bitmapArray = Base64 . decode ( string , Base64 . DEFAULT );

bitmap = BitmapFactory . decodeByteArray ( bitmapArray , 0 , bitmapArray . length );

} catch ( Exception e ) {

e . printStackTrace ();

}

return bitmap ;

}

/**

* 生成截图,不包含ActionBar

* @param context 传入Context

* @return Bitmap

public static Bitmap printScreenWithOutActionBar ( Activity context ) {

// 获取屏幕

View view = context . getWindow (). getDecorView ();

Display display = context . getWindowManager (). getDefaultDisplay ();

view . layout ( 0 , 0 , display . getWidth (), display . getHeight ());

view . setDrawingCacheEnabled ( true );

// 以一个矩形进行截图

Rect frame = new Rect ();

context . getWindow (). getDecorView (). getWindowVisibleDisplayFrame ( frame );

// 获取高度

int statusBarHeight = frame . top ;

int width = context . getWindowManager (). getDefaultDisplay (). getWidth ();

int height = context . getWindowManager (). getDefaultDisplay ()

. getHeight ();

// 获取ActionBar的高度

TypedArray actionbarSizeTypedArray = context . obtainStyledAttributes ( new int []{

android . R . attr . actionBarSize });

int h = ( int ) actionbarSizeTypedArray . getDimension ( 0 , 0 );

// 生成Bitmap

return Bitmap . createBitmap ( view . getDrawingCache (), 0 , statusBarHeight + h , width , height

- statusBarHeight - h );

// 生成文件

// File f = new File(Environment.getExternalStorageDirectory(),

// "output_image.jpg");

// FileOutputStream fOut = null;

// try {

// fOut = new FileOutputStream(f);

// bmp.compress(Bitmap.CompressFormat.JPEG, 100, fOut);

// fOut.flush();

// fOut.close();

// } catch (IOException e) {

// e.printStackTrace();

// }

// return Uri.fromFile(f);

}

/**

* 截取整个屏幕

* @param context

* @return Bitmap

public Bitmap printAllScreen ( Activity context ) {

View view = context . getWindow (). getDecorView ();

Display display = context . getWindowManager (). getDefaultDisplay ();

view . layout ( 0 , 0 , display . getWidth (), display . getHeight ());

view . setDrawingCacheEnabled ( true );

return Bitmap . createBitmap ( view . getDrawingCache ());

}

/**

* 合成图层

* @param background 背景

* @param foreground 前景

* @return Bitmap

private Bitmap toConformBitmap ( Bitmap background , Bitmap foreground ) {

if ( background == null || foreground == null ) {

return null ;

}

int bgWidth = background . getWidth ();

int bgHeight = background . getHeight ();

Bitmap bitmap = Bitmap . createBitmap ( bgWidth , bgHeight , Bitmap . Config . ARGB_8888 );

Canvas cv = new Canvas ( bitmap );

cv . drawBitmap ( background , 0 , 0 , null );

cv . drawBitmap ( foreground , 0 , 0 , null );

// 保存

cv . save ( Canvas . ALL_SAVE_FLAG );

// 存储

cv . restore ();

return bitmap ;

}

/**

* 将View转换为图片

* @param view 传入一个View

* @return Bitmap

public static Bitmap getBitmapFromView ( View view ) {

Bitmap returnedBitmap = Bitmap . createBitmap ( view . getWidth (), view . getHeight (), Bitmap . Config . ARGB_8888 );

Canvas canvas = new Canvas ( returnedBitmap );

Drawable bgDrawable = view . getBackground ();

if ( bgDrawable != null )

bgDrawable . draw ( canvas );

else

canvas . drawColor ( Color . WHITE );

view . draw ( canvas );

return returnedBitmap ;

}

/**

* 自动压缩图片

* @param image 传入图片bitmap

* @return bitmap

public static Bitmap compressImage ( Bitmap image ) {

ByteArrayOutputStream baoS = new ByteArrayOutputStream ();

// 质量压缩方法，这里100表示不压缩，把压缩后的数据存放到baoS中

int options = 100 ;

image . compress ( Bitmap . CompressFormat . JPEG , 100 , baoS );

// 循环判断如果压缩后图片是否大于100kb,大于继续压缩

while ( baoS . toByteArray (). length / 1024 > 100 ) {

// 重置baoS即清空baoS

baoS . reset ();

// 压缩options%，把压缩后的数据存放到baos中

image . compress ( Bitmap . CompressFormat . JPEG , options , baoS );

options -= 10 ;

}

// 把压缩后的数据baos存放到ByteArrayInputStream中

ByteArrayInputStream isBm = new ByteArrayInputStream ( baoS . toByteArray ());

// 把ByteArrayInputStream数据生成图片

return BitmapFactory . decodeStream ( isBm , null , null );

}

/**

* 指定压缩的质量压缩图片

* @param image 传入图片的Bitmap

* @param options 压缩图片质量

* @return bitmap

public static Bitmap compressImage ( Bitmap image , int options ) {

ByteArrayOutputStream baoS = new ByteArrayOutputStream ();

image . compress ( Bitmap . CompressFormat . JPEG , options , baoS );

ByteArrayInputStream isBm = new ByteArrayInputStream ( baoS . toByteArray ());

return BitmapFactory . decodeStream ( isBm , null , null );

}

/**

* 按照比例进行缩放

* @param image 传入的Bitmap

* @param width 传入的宽度

* @param height 传入的高度

* @return Bitmap

private static Bitmap compressWithMeasure ( Bitmap image , int width , int height ) {

ByteArrayOutputStream baoS = new ByteArrayOutputStream ();

image . compress ( Bitmap . CompressFormat . JPEG , 100 , baoS );

// 判断如果图片大于1M,进行压缩避免在生成图片（BitmapFactory.decodeStream）时溢出

if ( baoS . toByteArray (). length / 1024 > 1024 ) {

// 重置baoS即清空baoS

baoS . reset ();

// 这里压缩50%，把压缩后的数据存放到baoS中

image . compress ( Bitmap . CompressFormat . JPEG , 50 , baoS );

}

ByteArrayInputStream isBm = new ByteArrayInputStream ( baoS . toByteArray ());

BitmapFactory . Options newOpts = new BitmapFactory . Options ();

// 开始读入图片，此时把options.inJustDecodeBounds 设回true了

newOpts . inJustDecodeBounds = true ;

Bitmap bitmap = BitmapFactory . decodeStream ( isBm , null , newOpts );

newOpts . inJustDecodeBounds = false ;

int w = newOpts . outWidth ;

int h = newOpts . outHeight ;

// 缩放比。由于是固定比例缩放，只用高或者宽其中一个数据进行计算即可

// be = 1表示不缩放

int be = 1 ;

if ( w > h && w > width ) {

// 如果宽度大的话根据宽度固定大小缩放

be = newOpts . outWidth / width ;

} else if ( w < h && h > height ) {

// 如果高度高的话根据宽度固定大小缩放

be = newOpts . outHeight / height ;

}

if ( be <= 0 )

be = 1 ;

// 设置缩放比例

newOpts . inSampleSize = be ;

// 重新读入图片，注意此时已经把options.inJustDecodeBounds 设回false了

isBm = new ByteArrayInputStream ( baoS . toByteArray ());

bitmap = BitmapFactory . decodeStream ( isBm , null , newOpts );

// 压缩好比例大小后再进行质量压缩

return compressImage ( bitmap );

}

/**

* 按照原比例进行缩放

* @param image

* @return Bitmap

public static Bitmap compressWithMeasure ( Bitmap image ) {

return compressWithMeasure ( image , image . getWidth (), image . getHeight ());

}

/**

* 获取网络上的图片

* @param url

* @return

public static Bitmap getHttpBitmap ( String url ) {

URL myFileURL ;

Bitmap bitmap = null ;

try {

myFileURL = new URL ( url );

// 获得连接

HttpURLConnection conn = ( HttpURLConnection ) myFileURL . openConnection ();

conn . setConnectTimeout ( 6000 ); // 设置超时时间为6000毫秒，conn.setConnectionTiem(0);表示没有时间限制

conn . setDoInput ( true ); // 连接设置获得数据流

conn . setUseCaches ( false ); // 不使用缓存

InputStream is = conn . getInputStream (); // 得到数据流，这里会有调用conn.connect();

// 解析得到图片

bitmap = BitmapFactory . decodeStream ( is );

is . close (); // 关闭数据流

} catch ( Exception e ) {

e . printStackTrace ();

}

return bitmap ;

}

/**

* 从资源中获取Bitmap

* @param context

* @param resid 例如这样：R.drawable.icon

* @return

public static Bitmap getBitmapFromResources ( Context context , int resid ) {

Resources res = context . getResources ();

Bitmap bitmap = BitmapFactory . decodeResource ( res , resid );

return bitmap ;

}

/**

* Bitmap转字节

* @param bitmap

* @return

public byte [] Bitmap2Bytes ( Bitmap bitmap ) {

ByteArrayOutputStream baos = new ByteArrayOutputStream ();

bitmap . compress ( Bitmap . CompressFormat . PNG , 100 , baos );

return baos . toByteArray ();

}

/**

* 字节转Bitmap

* @param bytes

* @return

public Bitmap Bytes2Bimap ( byte [] bytes ) {

if ( bytes . length != 0 ) {

return BitmapFactory . decodeByteArray ( bytes , 0 , bytes . length );

} else {

return null ;

}

/**

* Bitmap缩放，可能比例要注意一下

* @param bitmap

* @param width

* @param height

* @return

public static Bitmap zoomBitmap ( Bitmap bitmap , int width , int height ) {

int w = bitmap . getWidth ();

int h = bitmap . getHeight ();

Matrix matrix = new Matrix ();

float scaleWidth = (( float ) width / w );

float scaleHeight = (( float ) height / h );

matrix . postScale ( scaleWidth , scaleHeight );

Bitmap newbmp = Bitmap . createBitmap ( bitmap , 0 , 0 , w , h , matrix , true );

return newbmp ;

}

/**

* 将Drawable转化为Bitmap

* @param drawable

* @return

public static Bitmap drawable2Bitmap ( Drawable drawable ) {

// 取 drawable 的长宽

int w = drawable . getIntrinsicWidth ();

int h = drawable . getIntrinsicHeight ();

// 取 drawable 的颜色格式

Bitmap . Config config = drawable . getOpacity () != PixelFormat . OPAQUE ? Bitmap . Config . ARGB_8888

: Bitmap . Config . RGB_565 ;

// 建立对应 bitmap

Bitmap bitmap = Bitmap . createBitmap ( w , h , config );

// 建立对应 bitmap 的画布

Canvas canvas = new Canvas ( bitmap );

drawable . setBounds ( 0 , 0 , w , h );

// 把 drawable 内容画到画布中

drawable . draw ( canvas );

return bitmap ;

}

/**

* Bitmap转换成Drawable

* @param context

* @param bitmap

* @return

public static Drawable Bitmap2Drawable ( Context context , Bitmap bitmap ) {

return new BitmapDrawable ( context . getResources (), bitmap );

}

/**

* 获得圆角图片

* @param bitmap

* @param roundPx

* @return

public static Bitmap getRoundedCornerBitmap ( Bitmap bitmap , float roundPx ) {

int w = bitmap . getWidth ();

int h = bitmap . getHeight ();

Bitmap output = Bitmap . createBitmap ( w , h , Bitmap . Config . ARGB_8888 );

Canvas canvas = new Canvas ( output );

final int color = 0xff424242 ;

final Paint paint = new Paint ();

final Rect rect = new Rect ( 0 , 0 , w , h );

final 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 ;

}

/**

* 获得带倒影的图片

* @param bitmap

* @return

public static Bitmap createReflectionImageWithOrigin ( Bitmap bitmap ) {

final int reflectionGap = 4 ;

int w = bitmap . getWidth ();

int h = bitmap . getHeight ();

Matrix matrix = new Matrix ();

matrix . preScale ( 1 , - 1 );

Bitmap reflectionImage ;

reflectionImage = Bitmap . createBitmap ( bitmap , 0 , h / 2 , w , h / 2 , matrix , false );

Bitmap bitmapWithReflection = Bitmap . createBitmap ( w , ( h + h / 2 ), Bitmap . Config . ARGB_8888 );

Canvas canvas = new Canvas ( bitmapWithReflection );

canvas . drawBitmap ( bitmap , 0 , 0 , null );

Paint defaultPaint = new Paint ();

canvas . drawRect ( 0 , h , w , h + reflectionGap , defaultPaint );

canvas . drawBitmap ( reflectionImage , 0 , h + reflectionGap , null );

Paint paint = new Paint ();

LinearGradient shader = new LinearGradient ( 0 , bitmap . getHeight (), 0 , bitmapWithReflection . getHeight ()

+ reflectionGap , 0x70ffffff , 0x00ffffff , Shader . TileMode . CLAMP );

paint . setShader ( shader );

// Set the Transfer mode to be porter duff and destination in

paint . setXfermode ( new PorterDuffXfermode ( PorterDuff . Mode . DST_IN ));

// Draw a rectangle using the paint with our linear gradient

canvas . drawRect ( 0 , h , w , bitmapWithReflection . getHeight () + reflectionGap , paint );

return bitmapWithReflection ;

}

public static class ImagePiece {

public Bitmap bitmap = null ;

public int index = 0 ;

public ImagePiece ( Bitmap bitmap ) {

this . bitmap = bitmap ;

this . index = 0 ;

}

public ImagePiece ( Bitmap bitmap , int index ) {

this . bitmap = bitmap ;

this . index = index ;

}

/**

* 截图分片

* @param context

* @param bitmap

* @return

public static List < ImagePiece > spilt ( Context context , Bitmap bitmap ) {

int screenHeight = (( WindowManager ) context . getSystemService ( Context . WINDOW_SERVICE ))

. getDefaultDisplay (). getHeight ();

List < ImagePiece > list = new ArrayList <>();

if ( bitmap . getHeight () <= screenHeight ) {

list . add ( new ImagePiece ( bitmap ));

return list ;

}

int pageNum = Math . round ( bitmap . getHeight () * 1.0f / screenHeight );

for ( int i = 0 ; i < pageNum ; i ++) {

int xValue = 0 ;

int yValue = i * screenHeight + DisplayUtils . dp2px ( context , 16 );

list . add ( new ImagePiece (

Bitmap . createBitmap ( bitmap , xValue , yValue ,

bitmap . getWidth (), screenHeight ),

i ));

}

return list ;

}

/**

* 截取ScrollView

* @param v

* @return

public static Bitmap createBitmap ( Context context , ScrollView v ) {

int width = 0 , height = 0 ;

for ( int i = 0 ; i < v . getChildCount (); i ++) {

width += v . getChildAt ( i ). getWidth ();

height += v . getChildAt ( i ). getHeight ();

}

if ( width <= 0 || height <= 0 ) {

return null ;

}

int h = (( WindowManager ) context . getSystemService ( Context . WINDOW_SERVICE )). getDefaultDisplay (). getHeight ();

if ( height < h )

height = h ;

Bitmap bitmap = Bitmap . createBitmap ( width , height , Bitmap . Config . ARGB_8888 );

Canvas canvas = new Canvas ( bitmap );

v . draw ( canvas );

return bitmap ;

}

/**

* 制作圆形图片

* @param rect

public static Bitmap rectBitmapToCircle ( Bitmap rect ) {

Shader mBitmapShader = new BitmapShader ( rect , Shader . TileMode . CLAMP ,

Shader . TileMode . CLAMP );

Paint paint = new Paint ();

paint . setShader ( mBitmapShader );

Bitmap output = Bitmap . createBitmap ( rect . getWidth (), rect . getHeight (), Bitmap . Config . ARGB_8888 );

Canvas canvas = new Canvas ( output );

canvas . drawCircle ( rect . getWidth () / 2 ,

rect . getHeight () / 2 ,

Math . min ( rect . getWidth (), rect . getHeight ()) / 2

, paint );

return output ;

}

PicUtils.java

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PicUtils.java

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