Android(安卓)Bitmap Drawable byte[] InputStream 相互转换方法

用android处理图片的时候，由于得到的资源不一样，所以经常要在各种格式中相互转化，以下介绍了 Bitmap Drawable byte[] InputStream 之间的转换方法：
import java.io.ByteArrayInputStream;  import java.io.ByteArrayOutputStream;  import java.io.InputStream;   import android.graphics.Bitmap;  import android.graphics.BitmapFactory;  import android.graphics.Canvas;  import android.graphics.PixelFormat;  import android.graphics.drawable.BitmapDrawable;  import android.graphics.drawable.Drawable;  /**  * Bitmap与DrawAble与byte[]与InputStream之间的转换工具类  * @author Administrator  *  */  public class FormatTools {      private static FormatTools tools = new FormatTools();      public static FormatTools getInstance() {          if (tools == null) {              tools = new FormatTools();              return tools;          }          return tools;      }      // 将byte[]转换成InputStream      public InputStream Byte2InputStream(byte[] b) {          ByteArrayInputStream bais = new ByteArrayInputStream(b);          return bais;      }      // 将InputStream转换成byte[]      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;      }      // 将Bitmap转换成InputStream      public InputStream Bitmap2InputStream(Bitmap bm) {          ByteArrayOutputStream baos = new ByteArrayOutputStream();          bm.compress(Bitmap.CompressFormat.JPEG, 100, baos);          InputStream is = new ByteArrayInputStream(baos.toByteArray());          return is;      }      // 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;      }      // 将InputStream转换成Bitmap      public Bitmap InputStream2Bitmap(InputStream is) {          return BitmapFactory.decodeStream(is);      }      // Drawable转换成InputStream      public InputStream Drawable2InputStream(Drawable d) {          Bitmap bitmap = this.drawable2Bitmap(d);          return this.Bitmap2InputStream(bitmap);      }      // InputStream转换成Drawable      public Drawable InputStream2Drawable(InputStream is) {          Bitmap bitmap = this.InputStream2Bitmap(is);          return this.bitmap2Drawable(bitmap);      }      // Drawable转换成byte[]      public byte[] Drawable2Bytes(Drawable d) {          Bitmap bitmap = this.drawable2Bitmap(d);          return this.Bitmap2Bytes(bitmap);      }      // byte[]转换成Drawable      public Drawable Bytes2Drawable(byte[] b) {          Bitmap bitmap = this.Bytes2Bitmap(b);          return this.bitmap2Drawable(bitmap);      }      // Bitmap转换成byte[]      public byte[] Bitmap2Bytes(Bitmap bm) {          ByteArrayOutputStream baos = new ByteArrayOutputStream();          bm.compress(Bitmap.CompressFormat.PNG, 100, baos);          return baos.toByteArray();      }      // byte[]转换成Bitmap      public Bitmap Bytes2Bitmap(byte[] b) {          if (b.length != 0) {              return BitmapFactory.decodeByteArray(b, 0, b.length);          }          return null;      }      // 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;      }      // Bitmap转换成Drawable      public Drawable bitmap2Drawable(Bitmap bitmap) {          BitmapDrawable bd = new BitmapDrawable(bitmap);          Drawable d = (Drawable) bd;          return d;      }  }
转载自：http://my.oschina.NET/547217475/blog/93485
更多相关文章

随机推荐
