Android Bitmap与DrawAble与byte[]与InputStream之间的转换工具类

最新推荐文章于 2021-05-28 15:45:32 发布

原创最新推荐文章于 2021-05-28 15:45:32 发布 · 249 阅读

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本文介绍了一个用于Android平台的图片格式转换工具类，包括Bitmap、Drawable、byte[]及InputStream之间的相互转换方法。该工具类提供了多种转换选项，如不同的压缩质量设置等。

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package com.yiban.caesar.Utils;

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
 *
 */
public class IOFormat{
   private static IOFormat tools = new IOFormat();

   public static IOFormat getInstance(){
      if (tools == null) {
         tools = new IOFormat();
         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];
      @SuppressWarnings("unused")
      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){
      if(is == null){
         return null;
      }
      return BitmapFactory.decodeStream(is);
   }

   // Drawable转换成InputStream
   public InputStream drawable2InputStream(Drawable d){
      if(d == null){
         return null;
      }
      Bitmap bitmap = this.drawable2Bitmap(d);
      return this.bitmap2InputStream(bitmap);
   }

   // InputStream转换成Drawable
   public Drawable inputStream2Drawable(InputStream is){
      if(is == null){
         return null;
      }
      Bitmap bitmap = this.inputStream2Bitmap(is);
      return this.bitmap2Drawable(bitmap);
   }

   // Drawable转换成byte[]
   public byte[] drawable2Bytes(Drawable d){
      if(d == null){
         return null;
      }
      Bitmap bitmap = this.drawable2Bitmap(d);
      return this.bitmap2Bytes(bitmap);
   }

   // byte[]转换成Drawable
   public Drawable bytes2Drawable(byte[] b){
      if(b == null){
         return null;
      }
      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){
      @SuppressWarnings("deprecation")
      BitmapDrawable bd = new BitmapDrawable(bitmap);
      Drawable d = (Drawable) bd;
      return d;
   }
}