1.将home界面的search bar 移除

/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java

// Add first page QSB
        if (FeatureFlags.QSB_ON_FIRST_SCREEN) {
            CellLayout firstScreen = mWorkspaceScreens.get(FIRST_SCREEN_ID);
            View qsb = mHomeElementInflater.inflate(R.layout.qsb_preview, firstScreen,
                    false);
            CellLayout.LayoutParams lp =
                    new CellLayout.LayoutParams(0, 0, firstScreen.getCountX(), 1);
            lp.canReorder = false;
          //  firstScreen.addViewToCellLayout(qsb, 0, R.id.search_container_workspace, lp, true);
        }

/src/com/android/launcher3/Workspace.java

  /**
     * Initializes and binds the first page
     */
    public void bindAndInitFirstWorkspaceScreen() {
        if (!FeatureFlags.QSB_ON_FIRST_SCREEN) {
            return;
        }

        // Add the first page
        CellLayout firstPage = insertNewWorkspaceScreen(Workspace.FIRST_SCREEN_ID, getChildCount());
        // Always add a QSB on the first screen.
        /*
           if (mQsb == null) {
            // In transposed layout, we add the QSB in the Grid. As workspace does not touch the
            // edges, we do not need a full width QSB.
            mQsb = LayoutInflater.from(getContext())
                    .inflate(R.layout.search_container_workspace, firstPage, false);
        }
        */

        int cellVSpan = FeatureFlags.EXPANDED_SMARTSPACE.get()
                ? EXPANDED_SMARTSPACE_HEIGHT : DEFAULT_SMARTSPACE_HEIGHT;
        int cellHSpan = mLauncher.getDeviceProfile().inv.numSearchContainerColumns;
        CellLayout.LayoutParams lp = new CellLayout.LayoutParams(0, 0, cellHSpan, cellVSpan);
        lp.canReorder = false;
        /*
        if (!firstPage.addViewToCellLayout(mQsb, 0, R.id.search_container_workspace, lp, true)) {
            Log.e(TAG, "Failed to add to item at (0, 0) to CellLayout");
            mQsb = null;
        }
        */
    }

如果只修改了上面的话，serach bar可以消失，但是会引入一个新问题：

还需要将Qsb的属性值QSB_ON_FIRST_SCREEN做一个更新

src_build_config/com/android/launcher3/BuildConfig.java

public final class BuildConfig {
    public static final String APPLICATION_ID = "com.android.launcher3";
    public static final boolean DEBUG = false;
    /**
     * Flag to state if the QSB is on the first screen and placed on the top,
     * this can be overwritten in other launchers with a different value, if needed.
     */
    public static final boolean QSB_ON_FIRST_SCREEN = false;
}

未完待续...