本文主要是介绍Android 获得图片的总结,希望对大家解决编程问题提供一定的参考价值,需要的开发者们随着小编来一起学习吧!
//1,已将图片保存到drawable目录下//通过图片id获得DrawableResource res=gerResource(); Drawable drawable=res.getDrawable(id);//id为R.drawable.图片名称//通过图片id获得BitmapResource res=gerResource();Bitmap bitmap=BitmapFactory.decodeResource(res, id);//若只知道图片的名称,可以通过图片的名称获得图片的id//name:图片的名称 defType:图片的类型(png,jpeg),defPackage:工程的包名 int id =int id =res.getIdentifier(name, defType, defPackage); //获得id之后可以根据你的需要来获得Bitmap或Drawable//2,已将图片保存到assest目录下//知道图片的名称,通过inputstream打开图片AssetManager asm=getAssetMg(); InputStream is=asm.open(name);//name:图片的名称 //获得Drawable Drawable da = Drawable.createFromStream(is, null); //获得Bitmap Bitmap bitmap=BitmapFactory.decodeStream(is);//3,图片保存在sdcard,已知图片的路径//图片路径 String path = Environment.getExternalStorageDirectory().toString()+ "/DCIM/device.png"; RandomAccessFile mMiniThumbFile; File imgfile = new File(path); try {mMiniThumbFile = new RandomAccessFile(imgfile, "rw"); } catch (IOException ex) { // Open as read-only so we can at least read the existing // thumbnails. try { mMiniThumbFile = new RandomAccessFile(imgfile, "r"); } catch (IOException ex2) { // ignore exception System.out.println(ex2.toString()); } } data= new byte[10553]; try { mMiniThumbFile.seek(0); int got = mMiniThumbFile.read(data, 0, 10552); System.out.println("got="+got); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); System.out.println(e.toString()); } if (data != null) { //通过data获得bitmap Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0,data.length);
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