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正文
KK Launcher3的wallpaper显示是动态的，与Launcher预置桌面数目有关，让壁纸居中，只能确保第一次开机时壁纸居中，后面用户修改桌面数目后，就无法达到了。如何要在默认桌面数目配置时居中，可以参考下面方法，以default一屏为例：
Launcher3的workspace.java文件替换下面的函数
private void updateOffset(boolean force) {
if (mWaitingForUpdate || force) {
mWaitingForUpdate = false;
LauncherLog.d(TAG, "updateOffset: mWallpaperOffset = " + mWallpaperOffset.getCurrX());
if (computeScrollOffset() && mWindowToken != null) {
try {
if (getChildCount() <= 1) {
LauncherLog.d(TAG, "wallpaperOffset 111");
mWallpaperManager.setWallpaperOffsets(mWindowToken,
/* mWallpaperOffset.getCurrX()*/0.5f, 0.5f);
}else{
LauncherLog.d(TAG, "wallpaperOffset 222");
mWallpaperManager.setWallpaperOffsets(mWindowToken,
mWallpaperOffset.getCurrX(), 0.5f);
}
setWallpaperOffsetSteps();
} catch (IllegalArgumentException e) {
Log.e(TAG, "Error updating wallpaper offset: " + e);
}
}
}
}
if (mWaitingForUpdate || force) {
mWaitingForUpdate = false;
LauncherLog.d(TAG, "updateOffset: mWallpaperOffset = " + mWallpaperOffset.getCurrX());
if (computeScrollOffset() && mWindowToken != null) {
try {
if (getChildCount() <= 1) {
LauncherLog.d(TAG, "wallpaperOffset 111");
mWallpaperManager.setWallpaperOffsets(mWindowToken,
/* mWallpaperOffset.getCurrX()*/0.5f, 0.5f);
}else{
LauncherLog.d(TAG, "wallpaperOffset 222");
mWallpaperManager.setWallpaperOffsets(mWindowToken,
mWallpaperOffset.getCurrX(), 0.5f);
}
setWallpaperOffsetSteps();
} catch (IllegalArgumentException e) {
Log.e(TAG, "Error updating wallpaper offset: " + e);
}
}
}
}