Time:
Before 2021/04/07, the company does not allow csdn, and the notes are written elsewhere. recently tidied up
Problem Description:
原生壁纸设置壁纸之后，图片被拉伸。导出/data/system/users/0/wallpaper_info.xml
The mobile phone resolution is 480 854 and the wallpaper is set to 2 480 * 854
<?xml version='1.0' encoding='utf-8' standalone='yes' ?>
<wp id="10" width="960" height="854" cropLeft="0" cropTop="0" cropRight="0" cropBottom="0" colorsCount="3" colorValue0="-13485218" colorValue1="-801681" colorValue2="-2239870" colorHints="4" name="" />
Repair plan
1. Width and height calculation in wallpaper code
packages/apps/WallpaperPicker2/src/com/android/wallpaper/util/WallpaperCropUtils.java
public static Point getDefaultCropSurfaceSize(Resources resources, Display display, boolean scroll) {
Point minDims = new Point();
Point maxDims = new Point();
display.getCurrentSizeRange(minDims, maxDims);
int maxDim = Math.max(maxDims.x, maxDims.y);
int minDim = Math.max(minDims.x, minDims.y);
if (VERSION.SDK_INT >= VERSION_CODES.JELLY_BEAN_MR1) {
Point realSize = new Point();
display.getRealSize(realSize);
maxDim = Math.max(realSize.x, realSize.y);
minDim = Math.min(realSize.x, realSize.y);
}
final int defaultWidth, defaultHeight;
if (resources.getConfiguration().smallestScreenWidthDp >= 720) {
defaultWidth = (int) (maxDim * wallpaperTravelToScreenWidthRatio(maxDim, minDim));
defaultHeight = maxDim;
} else {
//这个值默认是2 WALLPAPER_SCREENS_SPAN 双屏壁纸
defaultWidth = minDim;//scroll ? Math.max((int) (minDim * WALLPAPER_SCREENS_SPAN), maxDim) : minDim;
defaultHeight = maxDim;
}
return new Point(defaultWidth, defaultHeight);
}
2. Set the wallpaper width and height in packages/apps/Launcher3/src/com/android/launcher3/Workspace.java
protected void setWallpaperDimension() {
Executors.THREAD_POOL_EXECUTOR.execute(new Runnable() {
@Override
public void run() {
final Point size = LauncherAppState.getIDP(getContext()).defaultWallpaperSize;
if (size.x != mWallpaperManager.getDesiredMinimumWidth()
|| size.y != mWallpaperManager.getDesiredMinimumHeight()) {
mWallpaperManager.suggestDesiredDimensions(size.x, size.y);
}
}
});
}
3. Calculate the wallpaper width and height according to the display size in frameworks/base/services/core/java/com/android/server/wallpaper/WallpaperManagerService.java
loadSettingsLocked中:
private void ensureSaneWallpaperDisplaySize(DisplayData wpdData, int displayId) {
// We always want to have some reasonable width hint.
final int baseSize = getMaximumSizeDimension(displayId);
final int width = getMinimumSizeDimension(displayId);//我自己加的
Slog.i(TAG, "baseSize:" + baseSize + " width: "+width);
Slog.i(TAG, "wpdData.mWidth:" + wpdData.mWidth + " wpdData.mHeight: "+wpdData.mHeight);
if (wpdData.mWidth < width) {
wpdData.mWidth = width;
}
if (wpdData.mHeight < baseSize) {
wpdData.mHeight = baseSize;
}
Slog.w(TAG, "wpdData.mWidth:" + wpdData.mWidth + " wpdData.mHeight: "+wpdData.mHeight);
}
The above modification is invalid on android11
4. frameworks/base/packages/SystemUI/src/com/android/systemui/ImageWallpaper.java
@Override
public boolean shouldZoomOutWallpaper() {
//修改这里的返回值,并且修改WallpaperCropUtils中的修改,可以解决缩放问题
return !SPRD_STABLE_WALLPAPER;
}
//默认会放大1.1倍
<!-- The max scale for the wallpaper when it's zoomed in -->
<item name="config_wallpaperMaxScale" format="float" type="dimen">1.10</item>