public class ImageUtils {
private int picType;//0表示默认png图片；1表示jpg或者jpeg
public static ImageUtilsgetIntance(){
return new ImageUtils();
}
public void setPicType(int picType) {
this.picType = picType;
}
/**
* 质量压缩
*/
public BitmapcompressImage(Bitmap image) {
ByteArrayOutputStream baos =new ByteArrayOutputStream();
Bitmap.CompressFormat Type=picType==0?Bitmap.CompressFormat.PNG:Bitmap.CompressFormat.JPEG;
//image.compress(Bitmap.CompressFormat.JPEG, 100, baos);//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
image.compress(Type, 100, baos);//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;
while (baos.toByteArray().length /1024 >100) {//循环判断如果压缩后图片是否大于100kb,大于继续压缩
baos.reset();//重置baos即清空baos
image.compress(Bitmap.CompressFormat.JPEG, options, baos);//这里压缩options%，把压缩后的数据存放到baos中
options -=10;//每次都减少10
}
ByteArrayInputStream isBm =new ByteArrayInputStream(baos.toByteArray());//把压缩后的数据baos存放到ByteArrayInputStream中
Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null);//把ByteArrayInputStream数据生成图片
return bitmap;
}
/**
* 图片按比例大小压缩方法（根据路径获取图片并压缩）
*/
public Bitmapgetimage(String srcPath) {
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.decodeFile(srcPath, newOpts);//此时返回bm为空
newOpts.inJustDecodeBounds =false;
int w = newOpts.outWidth;
int h = newOpts.outHeight;
//现在主流手机比较多是800*480分辨率，所以高和宽我们设置为
float hh =800f;//这里设置高度为800f
float ww =480f;//这里设置宽度为480f
//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
int be =1;//be=1表示不缩放
if (w > h && w > ww) {//如果宽度大的话根据宽度固定大小缩放
be = (int) (newOpts.outWidth / ww);
}else if (w < h && h > hh) {//如果高度高的话根据宽度固定大小缩放
be = (int) (newOpts.outHeight / hh);
}
if (be <=0)
be =1;
newOpts.inSampleSize = be;//设置缩放比例
//重新读入图片，注意此时已经把options.inJustDecodeBounds 设回false了
bitmap = BitmapFactory.decodeFile(srcPath, newOpts);
return compressImage(bitmap);//压缩好比例大小后再进行质量压缩
}
/**
* 图片按比例大小压缩方法（根据Bitmap图片压缩）
*/
public Bitmapcomp(Bitmap image) {
ByteArrayOutputStream baos =new ByteArrayOutputStream();
image.compress(Bitmap.CompressFormat.JPEG, 100, baos);
if (baos.toByteArray().length /1024 >1024) {//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
baos.reset();//重置baos即清空baos
Bitmap.CompressFormat Type=picType==0?Bitmap.CompressFormat.PNG:Bitmap.CompressFormat.JPEG;
//image.compress(Bitmap.CompressFormat.JPEG, 50, baos);//这里压缩50%，把压缩后的数据存放到baos中
image.compress(Type, 50, baos);//这里压缩50%，把压缩后的数据存放到baos中
}
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;
//现在主流手机比较多是800*480分辨率，所以高和宽我们设置为
float hh =800f;//这里设置高度为800f
float ww =480f;//这里设置宽度为480f
//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
int be =1;//be=1表示不缩放
if (w > h && w > ww) {//如果宽度大的话根据宽度固定大小缩放
be = (int) (newOpts.outWidth / ww);
}else if (w < h && h > hh) {//如果高度高的话根据宽度固定大小缩放
be = (int) (newOpts.outHeight / hh);
}
if (be <=0)
be =1;
newOpts.inSampleSize = be;//设置缩放比例
//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);
return compressImage(bitmap);//压缩好比例大小后再进行质量压缩
}
/**判断图片类型*/
public void getPicTypeByUrl(String url){
if(url==null){
return;
}
if(url.equals("")){
return;
}
String[] picArray=url.split("/");
String picStr="";
if(picArray.length>0){
picStr=picArray[picArray.length-1];
}else{
picStr=picArray[0];
}
if(picStr.toLowerCase().contains(".png")){
picType=0;
}else if(picStr.toLowerCase().contains(".jpg")||picStr.toLowerCase().contains(".jpeg")){
picType=1;
}
}
/**通过图片url生成Bitmap对象
* @param urlpath
* @return Bitmap
* 根据图片url获取图片对象
*/
public static BitmapgetBitMBitmap(String urlpath) {
Bitmap map =null;
try {
URL url =new URL(urlpath);
URLConnection conn = url.openConnection();
conn.connect();
InputStream in;
in = conn.getInputStream();
map = BitmapFactory.decodeStream(in);
}catch (IOException e) {
e.printStackTrace();
}
return map;
}
/**通过图片url生成Drawable对象
* @param urlpath
* @return Bitmap
* 根据url获取布局背景的对象
*/
public static DrawablegetDrawable(String urlpath){
Drawable drawable =null;
try {
URL url =new URL(urlpath);
URLConnection conn = url.openConnection();
conn.connect();
InputStream in;
in = conn.getInputStream();
drawable = Drawable.createFromStream(in, "background.jpg");
}catch (IOException e) {
e.printStackTrace();
}
return drawable;
}
/**
* @param 将图片内容解析成字节数组
* @param inStream
* @return byte[]
* @throws Exception
*/
public static byte[]readStream(InputStream inStream)throws Exception {
byte[] buffer =new byte[1024];
int len = -1;
ByteArrayOutputStream outStream =new ByteArrayOutputStream();
while ((len = inStream.read(buffer)) != -1) {
outStream.write(buffer, 0, len);
}
byte[] data = outStream.toByteArray();
outStream.close();
inStream.close();
return data;
}
/**
* @param 将字节数组转换为ImageView可调用的Bitmap对象
* @param bytes
* @param opts
* @return Bitmap
*/
public static BitmapgetPicFromBytes(byte[] bytes,
BitmapFactory.Options opts) {
if (bytes !=null)
if (opts !=null)
return BitmapFactory.decodeByteArray(bytes, 0, bytes.length,
opts);
else
return BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
return null;
}
/**
* @param 图片缩放
* @param bitmap 对象
* @param w 要缩放的宽度
* @param h 要缩放的高度
* @return newBmp 新 Bitmap对象
*/
public static BitmapzoomBitmap(Bitmap bitmap, int w, int h){
int width = bitmap.getWidth();
int height = bitmap.getHeight();
Matrix matrix =new Matrix();
float scaleWidth = ((float) w / width);
float scaleHeight = ((float) h / height);
matrix.postScale(scaleWidth, scaleHeight);
Bitmap newBmp = Bitmap.createBitmap(bitmap, 0, 0, width, height,
matrix, true);
return newBmp;
}
/**
* 把Bitmap转Byte
* @Author HEH
* @EditTime 2010-07-19 上午11:45:56
*/
public static byte[]Bitmap2Bytes(Bitmap bm){
ByteArrayOutputStream baos =new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.PNG, 100, baos);
return baos.toByteArray();
}
/**
* 把字节数组保存为一个文件
* @Author HEH
* @EditTime 2010-07-19 上午11:45:56
*/
public static FilegetFileFromBytes(byte[] b, String outputFile) {
BufferedOutputStream stream =null;
File file =null;
try {
file =new File(outputFile);
FileOutputStream fstream =new FileOutputStream(file);
stream =new BufferedOutputStream(fstream);
stream.write(b);
}catch (Exception e) {
e.printStackTrace();
}finally {
if (stream !=null) {
try {
stream.close();
}catch (IOException e1) {
e1.printStackTrace();
}
}
}
return file;
}
}
