Android处理图像数据全记录
Android中处理图像是一件很常见的事情，这里记录备忘一些亲身使用过的处理图片数据的方法。
转为Bitmap
RGB值转Bitmap
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1 9 |
private Bitmap createColorBitmap(String rgb, int width, int height) { Bitmap bmp = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); int color = Color.parseColor(rgb); bmp.eraseColor(color); return bmp; //Usage Bitmap bmp = createColorBitmap("#cce8cf", 200, 50); |
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Color值转Bitmap
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1 7 |
private Bitmap createColorBitmap(int color, int width, int height) { Bitmap bmp = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); bmp.eraseColor(color); return bmp; //Usage Bitmap bmp = createColorBitmap(Color.BLUE, 200, 50); |
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字节数组转Bitmap
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1 3 |
private Bitmap getBitmapFromByteArray(byte[] array) { return BitmapFactory.decodeByteArray(array, 0, array.length); } |
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读取文件转Bitmap
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1 3 |
private Bitmap getBitmapFromFile(String pathName) { return BitmapFactory.decodeFile(pathName); } |
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读取资源转Bitmap
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1 3 |
private Bitmap getBitmapFromResource(Resources res, int resId) { return BitmapFactory.decodeResource(res, resId); } |
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输入流转Bitmap
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1 3 |
private Bitmap getBitmapFromStream(InputStream inputStream) { return BitmapFactory.decodeStream(inputStream); } |
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Drawable转Bitmap
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1 |
Bitmap icon = BitmapFactory.decodeResource(context.getResources(),R.drawable.icon_resource); |
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转为Drawable
资源转Drawable
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1 |
Drawable drawable = getResources().getDrawable(R.drawable.ic_launcher); |
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Bitmap转Drawable
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1 |
Drawable d = new BitmapDrawable(getResources(),bitmap); |
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图片圆角展示
通过对图片数据bitmap进行处理即可，其中pixels为边角的半径。
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1 21 |
public static Bitmap getRoundedCornerBitmap(Bitmap bitmap, int pixels) { Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap .getHeight(), Config.ARGB_8888); Canvas canvas = new Canvas(output); final int color = 0xff424242; final Paint paint = new Paint(); final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight()); final RectF rectF = new RectF(rect); final float roundPx = pixels; paint.setAntiAlias(true); canvas.drawARGB(0, 0, 0, 0); paint.setColor(color); canvas.drawRoundRect(rectF, roundPx, roundPx, paint); |
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