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

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

在新浪看到一些数据流的转化，分享一下：

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);      }  

  
9、 Bitmap转换成byte[]  

    public byte[] Bitmap2Bytes(Bitmap bm) {          ByteArrayOutputStream baos = new ByteArrayOutputStream();          bm.compress(Bitmap.CompressFormat.PNG, 100, baos);          return baos.toByteArray();      }  

  
10、 byte[]转换成Bitmap  

    public Bitmap Bytes2Bitmap(byte[] b) {          if (b.length != 0) {              return BitmapFactory.decodeByteArray(b, 0, b.length);          }          return null;      }  

  
11、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;      }  

  
12、 Bitmap转换成Drawable  

    public Drawable bitmap2Drawable(Bitmap bitmap) {          BitmapDrawable bd = new BitmapDrawable(bitmap);          Drawable d = (Drawable) bd;          return d;      }