Launcher3 Android10.0修改文件夹图标为九宫格

Launcher3 Android10.0修改文件夹图标为九宫格

文件夹图标在Launcher里表示为预览文件夹

1、修改预览文件夹的最大容纳数量为9

ClippedFolderIconLayoutRule.java:

public static final int MAX_NUM_ITEMS_IN_PREVIEW = 9;

2、判定只要rank小于9，就是可以在预览文件夹里显示的item

FolderIconPreviewVerifier.java:

public boolean isItemInPreview(int page, int rank) {

if (mGridSize[0] == 1) {

Log.w(TAG, "setFolderInfo not called before checking if item is in preview.");

}

return rank < MAX_NUM_ITEMS_IN_PREVIEW;

}

3、改完上面，这里传进来的index就只会是0-8，然后改一下计算位置的方法。

ClippedFolderIconLayoutRule.java:

private static final float MIN_SCALE = 0.2f;

public PreviewItemDrawingParams computePreviewItemDrawingParams(int index, int curNumItems,

PreviewItemDrawingParams params) {

float totalScale = scaleForItem();

float transX;

float transY;

float overlayAlpha = 0;

getPosition(index, mTmpPoint);

transX = mTmpPoint[0];

transY = mTmpPoint[1];

if (params == null) {

params = new PreviewItemDrawingParams(transX, transY, totalScale, overlayAlpha);

} else {

params.update(transX, transY, totalScale);

params.overlayAlpha = overlayAlpha;

}

return params;

}

private void getPosition(int index, float[] result) {

int x = index % 3;

int y = index / 3;

float totalLength = mAvailableSpace;

float iconSize = mIconSize * scaleForItem();

float padding = (totalLength-(iconSize*3))/4;

result[0] = (iconSize+padding)*x+padding;

result[1] = (iconSize+padding)*y+padding;

}

public float scaleForItem() {

return MIN_SCALE * mBaselineIconScale;

}

其实到这里就已经就是九宫格了

4、文件夹的图标比正常app图标要小一点，改成和app图标一样大。

DeviceProfile.java:

private void updateIconSize(float scale, Resources res, DisplayMetrics dm) {

......

// Folder icon

folderIconSizePx = iconSizePx;

......

}

5、设置文件夹图标和标题间距为0。

FolderIcon.java：

public static FolderIcon fromXml(int resId, Launcher launcher, ViewGroup group,

FolderInfo folderInfo) {

......

lp.topMargin = grid.iconSizePx;

}

因为之前有设置过app的图标和标题的间距为0，代码如下：

BubbleTextView.java:

public BubbleTextView(Context context, AttributeSet attrs, int defStyle) {

......

if (display == DISPLAY_WORKSPACE) {

......

setCompoundDrawablePadding(0);

......

} else if (display == DISPLAY_ALL_APPS) {

......

setCompoundDrawablePadding(0);

......

} else if (display == DISPLAY_FOLDER) {

......

//这里其实是文件夹PagedView里的app图标，不是文件夹图标

setCompoundDrawablePadding(0);

......

}

}

到这里就改完啦

如果你只改了MAX_NUM_ITEMS_IN_PREVIEW，你的文件夹图标将是下面这种，还能转圈圈哈哈哈哈哈哈

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