Android中Bitmap,byte[],Drawable，InputStream相互转化工具类

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1、将byte[]转换成InputStream

public InputStreamByte2InputStream(byte[] b) {

ByteArrayInputStream bais = newByteArrayInputStream(b);

return bais;

}

2、将InputStream转换成byte[]

两种方式：

一、

public static final byte[]InputStream2Bytes(InputStream inStream){

ByteArrayOutputStream swapStream = newByteArrayOutputStream();

byte[]buff = new byte[100];

int rc =0;

try{

while ((rc =inStream.read(buff, 0, 100)) > 0) {

swapStream.write(buff, 0,rc);

}

} catch (IOException e){

// TODO Auto-generatedcatch block

e.printStackTrace();

}

byte[]in2b = swapStream.toByteArray();

returnin2b;

}

二、

public byte[]InputStream2Bytes(InputStream is) {

String str = "";

byte[] readByte = new byte[1024];

int readCount = -1;

try {

while((readCount = is.read(readByte, 0, 1024)) != -1) {

str += newString(readByte).trim();

}

returnstr.getBytes();

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

3、将Bitmap转换成InputStream

public InputStreamBitmap2InputStream(Bitmap bm, int quality) {

ByteArrayOutputStream baos = newByteArrayOutputStream();

bm.compress(Bitmap.CompressFormat.PNG, quality,baos);

InputStream is = newByteArrayInputStream(baos.toByteArray());

return is;

}

4、将InputStream转换成Bitmap

public BitmapInputStream2Bitmap(InputStream is) {

return BitmapFactory.decodeStream(is);

}

5、Drawable转换成InputStream

public InputStreamDrawable2InputStream(Drawable d) {

Bitmap bitmap = this.drawable2Bitmap(d);

return this.Bitmap2InputStream(bitmap);

}

6、InputStream转换成Drawable

public DrawableInputStream2Drawable(InputStream is) {

Bitmap bitmap = this.InputStream2Bitmap(is);

return this.bitmap2Drawable(bitmap);

}

7、Drawable转换成byte[]

public byte[]Drawable2Bytes(Drawable d) {

Bitmap bitmap = this.drawable2Bitmap(d);

return this.Bitmap2Bytes(bitmap);

}

8、 byte[]转换成Drawable

public DrawableBytes2Drawable(byte[] b) {

Bitmap bitmap = this.Bytes2Bitmap(b);

return this.bitmap2Drawable(bitmap);

}

8、Bitmap转换成byte[]

public byte[]Bitmap2Bytes(Bitmap bm) {

ByteArrayOutputStream baos = newByteArrayOutputStream();

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

return baos.toByteArray();

}

9、byte[]转换成Bitmap

public BitmapBytes2Bitmap(byte[] b) {

if (b.length != 0) {

returnBitmapFactory.decodeByteArray(b, 0, b.length);

}

return null;

}

10、Drawable转换成Bitmap

public Bitmapdrawable2Bitmap(Drawable drawable) {

Bitmap bitmap = Bitmap

.createBitmap(

drawable.getIntrinsicWidth(),

drawable.getIntrinsicHeight(),

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

: Bitmap.Config.RGB_565);

Canvas canvas = new Canvas(bitmap);

drawable.setBounds(0, 0,drawable.getIntrinsicWidth(),

drawable.getIntrinsicHeight());

drawable.draw(canvas);

return bitmap;

}

11、Bitmap转换成Drawable

public Drawablebitmap2Drawable(Bitmap bitmap) {

BitmapDrawable bd = new BitmapDrawable(bitmap);

Drawable d = (Drawable) bd;

return d;

}

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