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

1、将byte[]转换成InputStream

public InputStream Byte2InputStream(byte[] b) {

ByteArrayInputStream bais = new ByteArrayInputStream(b);

return bais;

}

2、 将InputStream转换成byte[]

两种方式：

一、

public
static final byte[] InputStream2Bytes(InputStream inStream) {
ByteArrayOutputStream
swapStream = new ByteArrayOutputStream();
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-generated
catch block
e.printStackTrace();
}
byte[]
in2b = swapStream.toByteArray();
return
in2b;
}

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 += new String(readByte).trim();

}

return str.getBytes();

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

3、 将Bitmap转换成InputStream

public InputStream Bitmap2InputStream(Bitmap bm, int quality) {

ByteArrayOutputStream baos = new ByteArrayOutputStream();

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

InputStream is = new ByteArrayInputStream(baos.toByteArray());

return is;

}

4、 将InputStream转换成Bitmap

public Bitmap InputStream2Bitmap(InputStream is) {

return BitmapFactory.decodeStream(is);

}

5、 Drawable转换成InputStream

public InputStream Drawable2InputStream(Drawable d) {

Bitmap bitmap = this.drawable2Bitmap(d);

return this.Bitmap2InputStream(bitmap);

}

6、 InputStream转换成Drawable

public Drawable InputStream2Drawable(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 Drawable Bytes2Drawable(byte[] b) {

Bitmap bitmap = this.Bytes2Bitmap(b);

return this.bitmap2Drawable(bitmap);

}

8、 Bitmap转换成byte[]

public byte[] Bitmap2Bytes(Bitmap bm) {

ByteArrayOutputStream baos = new ByteArrayOutputStream();

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

return baos.toByteArray();

}

9、 byte[]转换成Bitmap

public Bitmap Bytes2Bitmap(byte[] b) {

if (b.length != 0) {

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

}

return null;

}

10、Drawable转换成Bitmap

public Bitmap drawable2Bitmap(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 Drawable bitmap2Drawable(Bitmap bitmap) {

BitmapDrawable bd = new BitmapDrawable(bitmap);

Drawable d = (Drawable) bd;

return d;

}