android - 在主屏幕上设置可滚动壁纸

Question

我想在主屏幕上设置可滚动壁纸，但我的壁纸会自动获得中心裁剪。我使用的图像比例为“3:2/ 16:9”，所以我希望它们在主屏幕的多个页面上均匀分布。

我目前正在使用：

wallpaperManager.suggestDesiredDimensions(width, height);
wallPaperBitmap = BitmapFactory.
                        decodeStream(url);

wallpaperManager.setBitmap(wallPaperBitmap);

`

<uses-sdk android:minSdkVersion="14" android:targetSdkVersion="21"/>

Answer 1

从 androidhive.com 获得帮助

//get screen height
Display display = getWindowManager().getDefaultDisplay();
        Point size = new Point();
        display.getSize(size);
        screenHeight = size.y;


 wallPaperBitmap= ... //your bitmap resource

//adjust the aspect ratio of the Image
//this is the main part
int width = wallPaperBitmap.getWidth();
            width = (width * screenHeight) / wallPaperBitmap.getHeight();
//set the wallpaper
//this may not be the most efficent way but it works
wallpaperManager.setBitmap(Bitmap.createScaledBitmap(wallPaperBitmap, width, height, true));