【Android】圖片操作之 —— Bitmap,byte[],Drawable,InputStream相互轉化工具類
public InputStream Byte2InputStream(byte[] b) {
ByteArrayInputStream bais = new ByteArrayInputStream(b);
return bais;
}
2、 將InputStream轉換成byte[]
兩種方式:
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、 將Bitmap轉換成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、 將InputStream轉換成Bitmap
public Bitmap InputStream2Bitmap(InputStream is) {
return BitmapFactory.decodeStream(is);
}
5、 Drawable轉換成InputStream
public InputStream Drawable2InputStream(Drawable d) {
Bitmap bitmap = this.drawable2Bitmap(d);
return this.Bitmap2InputStream(bitmap);
}
6、 InputStream轉換成Drawable
public Drawable InputStream2Drawable(InputStream is) {
Bitmap bitmap = this.InputStream2Bitmap(is);
return this.bitmap2Drawable(bitmap);
}
7、 Drawable轉換成byte[]
public byte[] Drawable2Bytes(Drawable d) {
Bitmap bitmap = this.drawable2Bitmap(d);
return this.Bitmap2Bytes(bitmap);
}
8、 byte[]轉換成Drawable
public Drawable Bytes2Drawable(byte[] b) {
Bitmap bitmap = this.Bytes2Bitmap(b);
return this.bitmap2Drawable(bitmap);
}
8、 Bitmap轉換成byte[]
public byte[] Bitmap2Bytes(Bitmap bm) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.PNG, 100, baos);
return baos.toByteArray();
}
9、 byte[]轉換成Bitmap
public Bitmap Bytes2Bitmap(byte[] b) {
if (b.length != 0) {
return BitmapFactory.decodeByteArray(b, 0, b.length);
}
return null;
}
10、Drawable轉換成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轉換成Drawable
public Drawable bitmap2Drawable(Bitmap bitmap) {
BitmapDrawable bd = new BitmapDrawable(bitmap);
Drawable d = (Drawable) bd;
return d;
}
以上僅僅作爲參考,還有更多方法等待更新。
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