引用：http://www.oschina.net/code/snippet_4873_4437
//1，已将图片保存到drawable目录下 |
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//通过图片id获得Drawable |
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Resource res=gerResource(); |
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Drawable drawable=res.getDrawable(id);//id为R.drawable.图片名称 |
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//通过图片id获得Bitmap |
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Resource res=gerResource(); |
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Bitmap bitmap=BitmapFactory.decodeResource(res, id); |
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//若只知道图片的名称，可以通过图片的名称获得图片的id |
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//name:图片的名称 defType：图片的类型（png,jpeg),defPackage:工程的包名 |
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int id =int id =res.getIdentifier(name, defType, defPackage); |
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//获得id之后可以根据你的需要来获得Bitmap或Drawable |
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//2,已将图片保存到assest目录下 |
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//知道图片的名称，通过inputstream打开图片 |
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AssetManager asm=getAssetMg(); |
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InputStream is=asm.open(name);//name:图片的名称 |
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//获得Drawable |
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Drawable da = Drawable.createFromStream(is, null); |
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//获得Bitmap |
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Bitmap bitmap=BitmapFactory.decodeStream(is); |
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//3,图片保存在sdcard,已知图片的路径 |
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//图片路径 |
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String path = Environment.getExternalStorageDirectory().toString()+ "/DCIM/device.png"; |
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RandomAccessFile mMiniThumbFile； |
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File imgfile = new File(path); |
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try { |
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mMiniThumbFile = new RandomAccessFile(imgfile, "rw"); |
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} catch (IOException ex) { |
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// Open as read-only so we can at least read the existing |
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// thumbnails. |
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try { |
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mMiniThumbFile = new RandomAccessFile(imgfile, "r"); |
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} catch (IOException ex2) { |
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// ignore exception |
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System.out.println(ex2.toString()); |
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} |
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} |
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data= new byte[10553]; |
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try { |
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mMiniThumbFile.seek(0); |
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int got = mMiniThumbFile.read(data, 0, 10552); |
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System.out.println("got="+got); |
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} catch (IOException e) { |
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// TODO Auto-generated catch block |
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e.printStackTrace(); |
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System.out.println(e.toString()); |
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} |
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if (data != null) { |
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//通过data获得bitmap |
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Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0,data.length); |
