Android10.0 MTK 平台 Launcher3 修改定制

前言

按照惯例 Launcher3 源码存在两份，分别位于 package/app/和vendor/mediatek/proprietary/packages/apps/下，vendor下的mk中使用 LOCAL_OVERRIDES_PACKAGES 属性覆盖 package 下的源码，所以我们要改的源码就是 vendor 下的。但是在 Q 中并不是这样的，编译后的Launcher3 app 路径为 product/priv-app/MtkLauncher3QuickStep/，来看下 mk,可以看到编译 MtkLauncher3QuickStep 并没有引用当前目录下的源码文件，并没有 LOCAL_SRC_FILES := \，而是引入静态库 Launcher3QuickStepLib

LOCAL_STATIC_ANDROID_LIBRARIES := Launcher3QuickStepLib

vendor\mediatek\proprietary\packages\apps\Launcher3\Android.mk

#
# Build rule for Quickstep app.
#
include $(CLEAR_VARS)
LOCAL_USE_AAPT2 := true
LOCAL_MODULE_TAGS := optional
....
LOCAL_PACKAGE_NAME := MtkLauncher3QuickStep
LOCAL_PRIVILEGED_MODULE := true
LOCAL_PRODUCT_MODULE := true
LOCAL_OVERRIDES_PACKAGES := Home Launcher2 Launcher3 Launcher3QuickStep
LOCAL_REQUIRED_MODULES := privapp_whitelist_com.android.launcher3

LOCAL_RESOURCE_DIR := \
    $(LOCAL_PATH)/quickstep/res \
    $(LOCAL_PATH)/quickstep/recents_ui_overrides/res

LOCAL_FULL_LIBS_MANIFEST_FILES := \
    $(LOCAL_PATH)/AndroidManifest.xml \
    $(LOCAL_PATH)/AndroidManifest-common.xml

LOCAL_MANIFEST_FILE := quickstep/AndroidManifest.xml
LOCAL_JACK_COVERAGE_INCLUDE_FILTER := com.android.launcher3.*

include $(BUILD_PACKAGE)

静态库编译在 packages\apps\Launcher3\Android.mk,所以不管你怎么修改 vendor下 Launcher3 的源码，编译都不生效，要去修改
packages\apps\Launcher3

#
# Build rule for Quickstep library.
#
include $(CLEAR_VARS)
.....

LOCAL_MODULE := Launcher3QuickStepLib
LOCAL_PRIVILEGED_MODULE := true
LOCAL_STATIC_ANDROID_LIBRARIES := \
    Launcher3CommonDepsLib \
    SecondaryDisplayLauncherLib

LOCAL_SRC_FILES := \
    $(call all-java-files-under, src) \
    $(call all-java-files-under, quickstep/src) \
    $(call all-java-files-under, quickstep/recents_ui_overrides/src) \
    $(call all-java-files-under, src_flags) \
    $(call all-java-files-under, src_shortcuts_overrides)

LOCAL_RESOURCE_DIR := \
    $(LOCAL_PATH)/quickstep/res \
    $(LOCAL_PATH)/quickstep/recents_ui_overrides/res
LOCAL_PROGUARD_ENABLED := disabled


LOCAL_MANIFEST_FILE := quickstep/AndroidManifest.xml
include $(BUILD_STATIC_JAVA_LIBRARY)

为了方便调试修改我们编译 userdebug 版本，可直接 push 替换效果。为了避免每次改动后整编烧写的麻烦，我还是直接修改 vendor中的Launcher3，新建一个android.mk,单独编译时引入当前路径下的源码，效果确认后再拷贝至 package 中 Launcher3 即可，每次修改源码后 mmm 得到 apk，push 进去，kill 进程查看效果。

vendor\mediatek\proprietary\packages\apps\Launcher3\Android.mk

LOCAL_PATH := $(call my-dir)

#
# Build rule for Quickstep app.
#
include $(CLEAR_VARS)
LOCAL_USE_AAPT2 := true
LOCAL_MODULE_TAGS := optional

LOCAL_STATIC_ANDROID_LIBRARIES := Launcher3QuickStepLib
LOCAL_PROGUARD_ENABLED := disabled

ifneq (,$(wildcard frameworks/base))
  LOCAL_PRIVATE_PLATFORM_APIS := true
else
  LOCAL_SDK_VERSION := system_current
  LOCAL_MIN_SDK_VERSION := 26
endif
LOCAL_PACKAGE_NAME := MtkLauncher3QuickStep
LOCAL_PRIVILEGED_MODULE := true
LOCAL_PRODUCT_MODULE := true
LOCAL_OVERRIDES_PACKAGES := Home Launcher2 Launcher3 Launcher3QuickStep
LOCAL_REQUIRED_MODULES := privapp_whitelist_com.android.launcher3

LOCAL_SRC_FILES := \
    $(call all-java-files-under, src) \
    $(call all-java-files-under, quickstep/src) 

LOCAL_RESOURCE_DIR := \
    $(LOCAL_PATH)/quickstep/res \
    $(LOCAL_PATH)/quickstep/recents_ui_overrides/res

LOCAL_FULL_LIBS_MANIFEST_FILES := \
    $(LOCAL_PATH)/AndroidManifest.xml \
    $(LOCAL_PATH)/AndroidManifest-common.xml

LOCAL_MANIFEST_FILE := quickstep/AndroidManifest.xml
LOCAL_JACK_COVERAGE_INCLUDE_FILTER := com.android.launcher3.*

include $(BUILD_PACKAGE)


# ==================================================
include $(call all-makefiles-under,$(LOCAL_PATH))

一、去掉默认 Google 搜索栏

修改位置

packages\apps\Launcher3\src\com\android\launcher3\Workspace.java

注释 bindAndInitFirstWorkspaceScreen（） 中 if (qsb == null) 开始到结尾

public void bindAndInitFirstWorkspaceScreen(View qsb) {
        if (!FeatureFlags.QSB_ON_FIRST_SCREEN) {
            return;
        }
        // Add the first page
        CellLayout firstPage = insertNewWorkspaceScreen(Workspace.FIRST_SCREEN_ID, 0);
        if (FeatureFlags.PULLDOWN_SEARCH) {
            .....
        }
        //add don't show google quick search box[qsb]
        // Always add a QSB on the first screen.
        /*if (qsb == 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.
            qsb = LayoutInflater.from(getContext())
                    .inflate(R.layout.search_container_workspace,firstPage, false);
        }

        
        CellLayout.LayoutParams lp = new CellLayout.LayoutParams(0, 0, firstPage.getCountX(), 1);
        lp.canReorder = false;
        if (!firstPage.addViewToCellLayout(qsb, 0, R.id.search_container_workspace, lp, true)) {
            Log.e(TAG, "Failed to add to item at (0, 0) to CellLayout");
        }*/
        //add don't show google quick search box[qsb]
    }

二、去掉所有 app 界面搜索应用栏

修改位置

packages\apps\Launcher3\src\com\android\launcher3\allapps\AllAppsContainerView.java

在 onFinishInflate() 中添加一行 mSearchContainer.setVisibility(View.GONE);

@Override
protected void onFinishInflate() {
    super.onFinishInflate();

    ....

    mSearchContainer = findViewById(R.id.search_container_all_apps);
    mSearchUiManager = (SearchUiManager) mSearchContainer;
    mSearchUiManager.initialize(mApps, mAppsRecyclerView);

    /// add this code don't show all app quick search box
    mSearchContainer.setVisibility(View.GONE);

    ......
}

packages\apps\Launcher3\src\com\android\launcher3\allapps\AllAppsTransitionController.java

注释setAlphas() 中的 mAppsView.getSearchUiManager()

public void setAlphas(int visibleElements, AnimationConfig config, AnimatorSetBuilder builder) {
        PropertySetter setter = config == null ? NO_ANIM_PROPERTY_SETTER
                : config.getPropertySetter(builder);
        boolean hasHeaderExtra = (visibleElements & ALL_APPS_HEADER_EXTRA) != 0;
        boolean hasContent = (visibleElements & ALL_APPS_CONTENT) != 0;

        Interpolator allAppsFade = builder.getInterpolator(ANIM_ALL_APPS_FADE, LINEAR);
        setter.setViewAlpha(mAppsView.getContentView(), hasContent ? 1 : 0, allAppsFade);
        setter.setViewAlpha(mAppsView.getScrollBar(), hasContent ? 1 : 0, allAppsFade);
        mAppsView.getFloatingHeaderView().setContentVisibility(hasHeaderExtra, hasContent, setter,
                allAppsFade);
        ///annotaion this code don't show all app quick search box
        //mAppsView.getSearchUiManager().setContentVisibility(visibleElements, setter, allAppsFade);

        setter.setInt(mScrimView, ScrimView.DRAG_HANDLE_ALPHA,
                (visibleElements & VERTICAL_SWIPE_INDICATOR) != 0 ? 255 : 0, allAppsFade);
    }

三、hotseat 位置居于底部

之前版本 lp.gravity 都在 DeviceProfile 中修改，Q 中移到了 Hotseat 类里面

@Override
    public void setInsets(Rect insets) {
        FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) getLayoutParams();
        DeviceProfile grid = mActivity.getWallpaperDeviceProfile();
        insets = grid.getInsets();

        if (grid.isVerticalBarLayout()) {
            lp.height = ViewGroup.LayoutParams.MATCH_PARENT;
            if (grid.isSeascape()) {
                lp.gravity = Gravity.LEFT;
                lp.width = grid.hotseatBarSizePx + insets.left;
            } else {
                lp.gravity = Gravity.RIGHT;
                lp.width = grid.hotseatBarSizePx + insets.right;
            }
        } else {
            lp.gravity = Gravity.BOTTOM;
            lp.width = ViewGroup.LayoutParams.MATCH_PARENT;
            lp.height = grid.hotseatBarSizePx + insets.bottom;
        }
        Rect padding = grid.getHotseatLayoutPadding();
        setPadding(padding.left, padding.top, padding.right, padding.bottom);

        setLayoutParams(lp);
        InsettableFrameLayout.dispatchInsets(this, insets);
    }

为了不影响其它间距计算我们去修改 grid.isVerticalBarLayout()

packages\apps\Launcher3\src\com\android\launcher3\DeviceProfile.java

将 transposeLayoutWithOrientation 置为 false 即可

// Some more constants
        transposeLayoutWithOrientation = false;
                //res.getBoolean(R.bool.hotseat_transpose_layout_with_orientation);

 public boolean isVerticalBarLayout() {
        return isLandscape && transposeLayoutWithOrientation;
    }

四、workspace 图标不显示文字bug修改

经过 log 打印发现 display == DISPLAY_WORKSPACE 时，textsize 和 padding 均为 0，所以文字不显示，直接注释当前 if，和

display == DISPLAY_ALL_APPS 共用逻辑

packages/apps/Launcher3/src/com/android/launcher3/BubbleTextView.java

public BubbleTextView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        mActivity = ActivityContext.lookupContext(context);
        mSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop();

        TypedArray a = context.obtainStyledAttributes(attrs,
                R.styleable.BubbleTextView, defStyle, 0);
        mLayoutHorizontal = a.getBoolean(R.styleable.BubbleTextView_layoutHorizontal, false);

        int display = a.getInteger(R.styleable.BubbleTextView_iconDisplay, DISPLAY_WORKSPACE);
        final int defaultIconSize;
        //annotaion code because textsize and padding is 0 don't show text
       /* if (display == DISPLAY_WORKSPACE) {
            android.util.Log.i("Launcher3","WorkspaceItemInfo");
            DeviceProfile grid = mActivity.getWallpaperDeviceProfile();
            setTextSize(TypedValue.COMPLEX_UNIT_PX, grid.iconTextSizePx);//0
            setCompoundDrawablePadding(grid.iconDrawablePaddingPx);//0
            defaultIconSize = grid.iconSizePx;
            android.util.Log.i("Launcher3","DISPLAY_WORKSPACE iconTextSizePx="+grid.iconTextSizePx);
            android.util.Log.i("Launcher3","DISPLAY_WORKSPACE iconDrawablePaddingPx="+grid.iconDrawablePaddingPx);
        } else */if (display == DISPLAY_WORKSPACE || display == DISPLAY_ALL_APPS) {
            DeviceProfile grid = mActivity.getDeviceProfile();
            setTextSize(TypedValue.COMPLEX_UNIT_PX, grid.allAppsIconTextSizePx);
            setCompoundDrawablePadding(grid.allAppsIconDrawablePaddingPx);
            defaultIconSize = grid.allAppsIconSizePx;
            android.util.Log.d("Launcher3","DISPLAY_ALL_APPS allAppsIconTextSizePx="+grid.allAppsIconTextSizePx);
            android.util.Log.d("Launcher3","DISPLAY_ALL_APPS allAppsIconDrawablePaddingPx="+grid.allAppsIconDrawablePaddingPx);
        } 

五、icon 图标去除多余白边

packages/apps/Launcher3/iconloaderlib/src/com/android/launcher3/icons/BaseIconFactory.java

private Drawable normalizeAndWrapToAdaptiveIcon(Drawable icon, boolean shrinkNonAdaptiveIcons,
            RectF outIconBounds, float[] outScale) {
        float scale = 1f;
        android.util.Log.e("Launcher3","normalizeAndWrapToAdaptiveIcon...");
        //annotation for don't add white mask outshape when targetsdk >= 26 
        /*if (shrinkNonAdaptiveIcons && ATLEAST_OREO) {
            if (mWrapperIcon == null) {
                mWrapperIcon = mContext.getDrawable(R.drawable.adaptive_icon_drawable_wrapper)
                        .mutate();
            }
            AdaptiveIconDrawable dr = (AdaptiveIconDrawable) mWrapperIcon;
            dr.setBounds(0, 0, 1, 1);
            boolean[] outShape = new boolean[1];
            scale = getNormalizer().getScale(icon, outIconBounds, dr.getIconMask(), outShape);
            if (!(icon instanceof AdaptiveIconDrawable) && !outShape[0]) {
                FixedScaleDrawable fsd = ((FixedScaleDrawable) dr.getForeground());
                fsd.setDrawable(icon);
                fsd.setScale(scale);
                icon = dr;
                scale = getNormalizer().getScale(icon, outIconBounds, null, null);

                ((ColorDrawable) dr.getBackground()).setColor(mWrapperBackgroundColor);
            }
        } else {
            scale = getNormalizer().getScale(icon, outIconBounds, null, null);
        }*/
        scale = getNormalizer().getScale(icon, outIconBounds, null, null);
        outScale[0] = scale;
        return icon;
    }