Android M 去除抽屉模式

 一、设置总开关

1、添加一个开关，控制是否去掉抽屉。

 launcher3\src\com\android\launcher3\launcherappstate.java:

public static boolean isDisableAllApps() {
        // Returns false on non-dogfood builds.
        return android.os.SystemProperties.get("ro.magcomm.launcher3.ishome2","0").equals("1");
    }

 二、allapp键的加载

        在hotseat里面去掉allapp键的加载 ，屏蔽isallappsbuttonrank()占用allapp位置。

        1) 不再占用allapp位置

        2) 在加载workspace时,会留出hotseat的第三个位置给allapp按钮,若不取消该位置的占用,在hotseat加载时会留出空位。hotseat的初始化在hotseat.java中

        launcher3\src\com\android\launcher3\hotseat.java c>isallappsbuttonrank():

public boolean isAllAppsButtonRank(int rank) {
        //add by liaoxiaomin begin @{
        if (LauncherAppState.isDisableAllApps()) {
            return false;
        }
        //add by liaoxiaomin end @}
        return rank == mAllAppsButtonRank;
    }

3) home2没有抽屉，所以不需要allapp按钮。在hotseat里面去掉allapp键的加载，在hotseat.java 的void resetlayout()中初始化hotseat布局。在home2时停止加载allapp按钮。

        launcher3\src\com\android\launcher3\hotseat.java c>resetlayout():

void resetlayout() {
    mcontent.removeallviewsinlayout();
    //添加 @{
    if(launcherappstate.isdisableallapps()){
    //添加 }@
    // add the apps button
    context context = getcontext();
    layoutinflater inflater = layoutinflater.from(context);
    textview allappsbutton = (textview)
        inflater.inflate(r.layout.all_apps_button, mcontent, false);
    drawable d = context.getresources().getdrawable(r.drawable.all_apps_button_icon);
    mlauncher.resizeicondrawable(d);
    allappsbutton.setcompounddrawables(null, d, null, null);
    allappsbutton.setcontentdescription(context.getstring(r.string.all_apps_button_label));
    allappsbutton.setonkeylistener(new hotseaticonkeyeventlistener());
    if (mlauncher != null) {
      mlauncher.setallappsbutton(allappsbutton);
      allappsbutton.setontouchlistener(mlauncher.gethapticfeedbacktouchlistener());
      allappsbutton.setonclicklistener(mlauncher);
      allappsbutton.setonlongclicklistener(mlauncher);
      allappsbutton.setonfocuschangelistener(mlauncher.mfocushandler);
    }
    // note: we do this to ensure that the hotseat is always laid out in the orientation of
    // the hotseat in order regardless of which orientation they were added
    int x = getcellxfromorder(mallappsbuttonrank);
    int y = getcellyfromorder(mallappsbuttonrank);
    celllayout.layoutparams lp = new celllayout.layoutparams(x,y,1,1);
    lp.canreorder = false;
    mcontent.addviewtocelllayout(allappsbutton, -1, allappsbutton.getid(), lp, true);
    }
}//别漏了这里的 }

三、数据初始化类中更改hotseat布局

        invariantdeviceprofile.java launcher3进行布局初始化的一个类。

        在有allapp按钮时hotseat里hotseat图标数量为五个，没有allapp按钮时hotseat图标数量应为四个。

        launcher3\src\com\android\launcher3\invariantdeviceprofile.java:

        1)先加个宏控

//添加 @{
private boolean hasda = launcherappstate.isdisableallapps();
//添加 }@

 2)去掉抽屉时，hotseat的格数为四格，所以不能抛出异常。 ( numhotseaticons 为偶时不抛异常)

        invariantdeviceprofile( ):

invariantdeviceprofile(string n, float w, float h, int r, int c, int fr, int fc, int maapc,
    // ensure that we have an odd number of hotseat items (since we need to place all apps)
    if (hs % 2 == 0&& !hasda) {// 在无抽屉情况下不抛异常
      throw new runtimeexception("all device profiles must have an odd number of hotseat spaces");
    }
    name = n;
     ...  ...
}

3)去掉抽屉的情况下加载不同的布局

        getpredefineddeviceprofiles() :

ArrayList<InvariantDeviceProfile> getPredefinedDeviceProfiles() {
        ArrayList<InvariantDeviceProfile> predefinedDeviceProfiles = new ArrayList<>();
        // width, height, #rows, #columns, #folder rows, #folder columns,
        // iconSize, iconTextSize, #hotseat, #hotseatIconSize, defaultLayoutId.
        //modify by liaoxiaomin begin
        /*predefinedDeviceProfiles.add(new InvariantDeviceProfile("Super Short Stubby",
                255, 300,     2, 3, 2, 3, 3, 48, 13, 3, 48, R.xml.default_workspace_4x4));
        predefinedDeviceProfiles.add(new InvariantDeviceProfile("Shorter Stubby",
                255, 400,     3, 3, 3, 3, 3, 48, 13, 3, 48, R.xml.default_workspace_4x4));
        predefinedDeviceProfiles.add(new InvariantDeviceProfile("Short Stubby",
                275, 420,     3, 4, 3, 4, 4, 48, 13, 5, 48, R.xml.default_workspace_4x4));
        predefinedDeviceProfiles.add(new InvariantDeviceProfile("Stubby",
                255, 450,     3, 4, 3, 4, 4, 48, 13, 5, 48, R.xml.default_workspace_4x4));
        predefinedDeviceProfiles.add(new InvariantDeviceProfile("Nexus S",
                296, 491.33f, 4, 4, 4, 4, 4, 48, 13, 5, 48, R.xml.default_workspace_4x4));
        predefinedDeviceProfiles.add(new InvariantDeviceProfile("Nexus 4",
                335, 567,     4, 4, 4, 4, 4, DEFAULT_ICON_SIZE_DP, 13, 5, 56, R.xml.default_workspace_4x4));
        predefinedDeviceProfiles.add(new InvariantDeviceProfile("Nexus 5",
                359, 567,     4, 4, 4, 4, 4, DEFAULT_ICON_SIZE_DP, 13, 5, 56, R.xml.default_workspace_4x4));*/
        predefinedDeviceProfiles.add(new InvariantDeviceProfile("Super Short Stubby",
                255, 300,     2, 3, 2, 3, 3, 48, 13, 3, 48, R.xml.default_workspace_4x4));
        predefinedDeviceProfiles.add(new InvariantDeviceProfile("Shorter Stubby",
                255, 400,     3, 3, 3, 3, 3, 48, 13, 3, 48, R.xml.default_workspace_4x4));
        predefinedDeviceProfiles.add(new InvariantDeviceProfile("Short Stubby",
                275, 420,     3, 4, 3, 4, 4, 48, 13, (hasDA ? 4 : 5), 48, (hasDA ? R.xml.default_workspace_4x4_no_all_apps : R.xml.default_workspace_4x4 )));
        predefinedDeviceProfiles.add(new InvariantDeviceProfile("Stubby",
                255, 450,     3, 4, 3, 4, 4, 48, 13, (hasDA ? 4 : 5), 48, (hasDA ? R.xml.default_workspace_4x4_no_all_apps : R.xml.default_workspace_4x4 )));
        predefinedDeviceProfiles.add(new InvariantDeviceProfile("Nexus S",
                296, 491.33f, 4, 4, 4, 4, 4, 48, 13,(hasDA ? 4 : 5), 48, (hasDA ? R.xml.default_workspace_4x4_no_all_apps : R.xml.default_workspace_4x4 )));
        predefinedDeviceProfiles.add(new InvariantDeviceProfile("Nexus 4",
                335, 567,     4, 4, 4, 4, 4, DEFAULT_ICON_SIZE_DP, 13, (hasDA ? 4 : 5), 56, (hasDA ? R.xml.default_workspace_4x4_no_all_apps : R.xml.default_workspace_4x4 )));
        predefinedDeviceProfiles.add(new InvariantDeviceProfile("Nexus 5",
                359, 567,     4, 4, 4, 4, 4, DEFAULT_ICON_SIZE_DP, 13,(hasDA ? 4 : 5), 56, (hasDA ? R.xml.default_workspace_4x4_no_all_apps : R.xml.default_workspace_4x4 )));
        predefinedDeviceProfiles.add(new InvariantDeviceProfile("Large Phone",
                406, 694,     5, 5, 4, 4, 4, 64, 14.4f,  5, 56, R.xml.default_workspace_5x5));
        //modify by liaoxiaomin end
        predefinedDeviceProfiles.add(new InvariantDeviceProfile("Large Phone",
                406, 694,     5, 5, 4, 4, 4, 64, 14.4f,  5, 56, R.xml.default_workspace_5x5));
        // The tablet profile is odd in that the landscape orientation
        // also includes the nav bar on the side
        predefinedDeviceProfiles.add(new InvariantDeviceProfile("Nexus 7",
                575, 904,     5, 6, 4, 5, 4, 72, 14.4f,  7, 60, R.xml.default_workspace_5x6));
        // Larger tablet profiles always have system bars on the top & bottom
        predefinedDeviceProfiles.add(new InvariantDeviceProfile("Nexus 10",
                727, 1207,    5, 6, 4, 5, 4, 76, 14.4f,  7, 64, R.xml.default_workspace_5x6));
        predefinedDeviceProfiles.add(new InvariantDeviceProfile("20-inch Tablet",
                1527, 2527,   7, 7, 6, 6, 4, 100, 20,  7, 72, R.xml.default_workspace_4x4));
        return predefinedDeviceProfiles;
    }
    

4)记得改下 dw_phone_hotseat.xml 的布局 ，因为hotseat只有5格了。

 四、将所有应用放在第一层

        launcher3加载流程:进入 launcherapplication -> launcherappstate -> 进行初始化环境(通过传递scontext)。进行事件监听&&初始化一些环境。例如:横竖屏、当局语言、像素密度、小部件和快捷图标数据库操作对象、应用图标缓存对象、初始化launchermode等。在初始化过后，从launcher的oncreate方法入手。mmodel.startloader(mworkspace.getrestorepage());里加载数据 。在加载完成所有快捷方式后将其余为加载完的应用布局在第一层。

        1) 成所有快捷方式后将其余为加载完的应用布局在第一层。

        launcher3\src\com\android\launcher3\launchermodel.java:

        launchermodel$loadertask c> run():

public void run() {
            synchronized (mLock) {
                if (DEBUG_LOADERS) {
                    LauncherLog.d(TAG, "Set load task running flag >>>>, mIsLaunching = " +
                            ",this = " + this);
                }

                if (mStopped) {
                    return;
                }
                mIsLoaderTaskRunning = true;
            }
            // Optimize for end-user experience: if the Launcher is up and // running with the
            // All Apps interface in the foreground, load All Apps first. Otherwise, load the
            // workspace first (default).
            keep_running: {
                if (DEBUG_LOADERS) Log.d(TAG, "step 1: loading workspace");
                loadAndBindWorkspace();

                if (mStopped) {
                    LauncherLog.i(TAG, "LoadTask break in the middle, this = " + this);
                    break keep_running;
                }

                waitForIdle();

                // second step
                if (DEBUG_LOADERS) Log.d(TAG, "step 2: loading all apps");
                loadAndBindAllApps();
                //add by liaoxiaomin begin  @{
                if (LauncherAppState.isDisableAllApps()) {
                    verifyApplications();
                }
                //add by liaoxiaomin end }@
            }

            // Clear out this reference, otherwise we end up holding it until all of the
            // callback runnables are done.
            mContext = null;

            synchronized (mLock) {
                // If we are still the last one to be scheduled, remove ourselves.
                if (mLoaderTask == this) {
                    mLoaderTask = null;
                }
                if (DEBUG_LOADERS) {
                    LauncherLog.d(TAG, "Reset load task running flag <<<<, this = " + this);
                }
                mIsLoaderTaskRunning = false;
                mHasLoaderCompletedOnce = true;
            }
        }
        //add by liaoxiaomin begin
        private void verifyApplications() {
            final Context context = mApp.getContext();

            // Cross reference all the applications in our apps list with items in the workspace
            ArrayList<ItemInfo> tmpInfos;
            ArrayList<ItemInfo> added = new ArrayList<ItemInfo>();
            synchronized (sBgLock) {
                for (AppInfo app : mBgAllAppsList.data) {
                    tmpInfos = getItemInfoForComponentName(app.componentName, app.user);
                    if (tmpInfos.isEmpty()) {
                        // We are missing an application icon, so add this to the workspace
                        added.add(app);
                        // This is a rare event, so lets log it
                        Log.e(TAG, "Missing Application on load: " + app);
                    }
                }
            }
            if (!added.isEmpty()) {
                addAndBindAddedWorkspaceItems(context, added);
            }
        }
        //add by liaoxiaomin end

 五、有新应用添加时更新workspace

        当安装新应用时，我们需要对左面更新，保证安装的应用添加在第一层上。

        launcher3\src\com\android\launcher3\launchermodel.java:

        launchermodel$packageupdatedtask c> run():

        if (added != null) {
                // add by liaoxiaomin begin @{
                if(LauncherAppState.isDisableAllApps()){
                    final ArrayList<ItemInfo> addedInfos = new ArrayList<ItemInfo>(added);
                    addAndBindAddedWorkspaceItems(context, addedInfos);
                }else {
                    // add by liaoxiaomin end }@
                    addAppsToAllApps(context, added);
                }// add by liaoxiaomin
                for (AppInfo ai : added) {
                    addedOrUpdatedApps.put(ai.componentName, ai);
                }
            }

 六、去掉长按时的删除选项

        长按时，不该有删除选项 。

        deletedroptarget.java: 中更改长按时的监听，开始时直接屏蔽删除按钮，后来发现应用自身发出的快捷方式无法删除 所以做了如下处理。

        launcher3\src\com\android\launcher3\deletedroptarget.java c>supportsdrop():

    public static boolean supportsDrop(Object info) {
        //add by liaoxiaomin begin @{
        if (LauncherAppState.isDisableAllApps()) {
            if (info instanceof ShortcutInfo) {
                ShortcutInfo item = (ShortcutInfo) info;
                return item.itemType != LauncherSettings.BaseLauncherColumns.ITEM_TYPE_APPLICATION;
            }
            return info instanceof LauncherAppWidgetInfo;
        }
        //add by liaoxiaomin end }@
        return (info instanceof ShortcutInfo)
                || (info instanceof LauncherAppWidgetInfo)
                || (info instanceof FolderInfo);
    }

 七、解决添加新应用后使用产生快捷方式问题

Launcher3/src/com/android/launcher3/LauncherModel.java 

if (targetIntent != null && info.user.equals(user)) {
        String s = targetIntent.toUri(0);
        +                        //liaoxiaomin modify for launcher add item 20190514 begin
        +                        String mTargetComponentName = targetIntent.getComponent().toString();
        +                        if(intent.getComponent() != null && mTargetComponentName.equals(intent.getComponent().toString())) {
        +                            return true;
        +                        }
        +                        //liaoxiaomin modify for launcher add item 20190514 end
        if (intentWithPkg.equals(s) || intentWithoutPkg.equals(s)) {
        return true;
        }