原文：http://wuxiaolong.me/2015/08/10/Drawable-to-Bitmap/
Drawable互转Bitmap
Drawable转Bitmap
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Resources res = getResources();Drawable drawable = res.getDrawable(R.drawable.myimage);BitmapDrawable bd = (BitmapDrawable) d;Bitmap bm = bd.getBitmap(); |
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public static Bitmap drawableToBitmap(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); //canvas.setBitmap(bitmap); drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight()); drawable.draw(canvas); return bitmap;}
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Bitmap转Drawable
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Bitmap bm=xxx; //xxx根据你的情况获取BitmapDrawable bd=BitmapDrawable(bm);BtimapDrawable是Drawable的子类，最终直接使用bd对象即可。 mPicPath//本地图片路径转成Bitmap格式Bitmap pic = BitmapFactory.decodeFile(this.mPicPath); image.setImageBitmap(pic);转成Bitmap格式 |
String与InputStream相互转换
String to InputStream
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String str = "String与InputStream相互转换";InputStream in_nocode = new ByteArrayInputStream(str.getBytes()); InputStream in_withcode = new ByteArrayInputStream(str.getBytes("UTF-8"));
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InputStream to String
这里提供几个方法。
方法1：
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public String convertStreamToString(InputStream is) { BufferedReader reader = new BufferedReader(new InputStreamReader(is)); StringBuilder sb = new StringBuilder();
String line = null; try { while ((line = reader.readLine()) != null) { sb.append(line + "/n"); } } catch (IOException e) { e.printStackTrace(); } finally { try { is.close(); } catch (IOException e) { e.printStackTrace(); } }
return sb.toString(); }
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方法2：
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public String inputStream2String (InputStream in) throws IOException { StringBuffer out = new StringBuffer(); byte[] b = new byte[4096]; for (int n; (n = in.read(b)) != -1;) { out.append(new String(b, 0, n)); } return out.toString(); }
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方法3：
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public static String inputStream2String(InputStream is) throws IOException{ ByteArrayOutputStream baos = new ByteArrayOutputStream(); int i=-1; while((i=is.read())!=-1){ baos.write(i); } return baos.toString(); }
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Bitmap 和 byte[]互转
Bitmap → byte[]
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private byte[] Bitmap2Bytes(Bitmap bm){ ByteArrayOutputStream baos = new ByteArrayOutputStream(); bm.compress(Bitmap.CompressFormat.PNG, 100, baos); return baos.toByteArray(); }
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byte[] → Bitmap
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private Bitmap Bytes2Bimap(byte[] b){ if(b.length!=0){ return BitmapFactory.decodeByteArray(b, 0, b.length); } else { return null; } }
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时间： 2024-08-07 03:58:47