1. Uri獲取絕對路徑

public static String getRealPathFromURI(Context mContext, Uri contentUri) {

        String res = null;
        String[] proj = {MediaStore.Images.Media.DATA};
        Cursor cursor = mContext.getContentResolver().query(contentUri, proj, null, null, null);
        if (cursor.moveToFirst()) {
            ;
            int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
            res = cursor.getString(column_index);
        }
        cursor.close();
        return res;
    }
 

//通過路徑將圖片轉化為Bitmap
    public static Bitmap GetBitmap(String path, int w, int h) {
        BitmapFactory.Options opts = new BitmapFactory.Options();
        opts.inJustDecodeBounds = true;
        opts.inPreferredConfig = Bitmap.Config.ARGB_8888;
        BitmapFactory.decodeFile(path, opts);
        int width = opts.outWidth;
        int height = opts.outHeight;
        float scaleWidth = 0.f, scaleHeight = 0.f;
        if (width > w || height > h) {
            scaleWidth = ((float) width) / w;
            scaleHeight = ((float) height) / h;
        }
        opts.inJustDecodeBounds = false;
        float scale = Math.max(scaleWidth, scaleHeight);
        opts.inSampleSize = (int) scale;
        WeakReference<Bitmap> weak = new WeakReference<Bitmap>(
                BitmapFactory.decodeFile(path, opts));
        return Bitmap.createScaledBitmap(weak.get(), w, h, true);
    }
 

public static Bitmap snapShotWithStatusBar(Activity activity)
	{
		View view = activity.getWindow().getDecorView();
		view.setDrawingCacheEnabled(true);
		view.buildDrawingCache();
		Bitmap bmp = view.getDrawingCache();
		int width = getScreenWidth(activity);
		int height = getScreenHeight(activity);
		Bitmap bp = null;
		bp = Bitmap.createBitmap(bmp, 0, 0, width, height);
		view.destroyDrawingCache();
		return bp;

	}