launcher学习
luancher的主布局文件：launcher.xml
x ,y 表示相应网格中的位置,screen表示在第几屏，spanx、spany表示widget占的空间
<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2007 The Android Open Source Project
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<!-- Full screen view projects under the status bar and contains the background -->
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:launcher="http://schemas.android.com/apk/res/com.android.launcher"
android:id="@+id/launcher"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/workspace_bg">
<com.android.launcher2.DragLayer
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:launcher="http://schemas.android.com/apk/res/com.android.launcher"
android:id="@+id/drag_layer"
android:background="@drawable/workspace_bg"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<!-- Keep these behind the workspace so that they are not visible when
we go into AllApps -->
<include
android:id="@+id/dock_divider"
layout="@layout/workspace_divider"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="@dimen/button_bar_height_plus_padding"
android:layout_gravity="bottom|center_horizontal" />
<include
android:id="@+id/paged_view_indicator"
layout="@layout/scroll_indicator"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:layout_marginBottom="@dimen/button_bar_height_plus_padding" />
<!-- The workspace contains 5 screens of cells 工作空间-->
<com.android.launcher2.Workspace
android:id="@+id/workspace"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/workspace_left_padding"
android:paddingRight="@dimen/workspace_right_padding"
android:paddingTop="@dimen/workspace_top_padding"
android:paddingBottom="@dimen/workspace_bottom_padding"
launcher:defaultScreen="3"
launcher:cellCountX="@integer/cell_count_x"
launcher:cellCountY="@integer/cell_count_y"
launcher:pageSpacing="@dimen/workspace_page_spacing"
launcher:scrollIndicatorPaddingLeft="@dimen/workspace_divider_padding_left"
launcher:scrollIndicatorPaddingRight="@dimen/workspace_divider_padding_right">
<include android:id="@+id/cell1" layout="@layout/workspace_screen" /> <!-- 5页-->
<include android:id="@+id/cell2" layout="@layout/workspace_screen" />
<include android:id="@+id/cell3" layout="@layout/workspace_screen" />
<include android:id="@+id/cell4" layout="@layout/workspace_screen" />
<include android:id="@+id/cell5" layout="@layout/workspace_screen" />
</com.android.launcher2.Workspace>
<include layout="@layout/hotseat"<!-- 下方的快捷方式-->
android:id="@+id/hotseat"
android:layout_width="match_parent"
android:layout_height="@dimen/button_bar_height_plus_padding"
android:layout_gravity="bottom" />
<include
android:id="@+id/qsb_bar"
layout="@layout/qsb_bar" />
<!-- The Workspace cling must appear under the AppsCustomizePagedView below to ensure
that it is still visible during the transition to AllApps and doesn't overlay on
top of that view. -->
<include layout="@layout/workspace_cling"<!-- 第一次进Home显示-->
android:id="@+id/workspace_cling"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="gone" />
<include layout="@layout/folder_cling"<!-- 第一次进文件夹存储快捷方式显示-->
android:id="@+id/folder_cling"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="gone" />
<com.android.launcher2.DrawableStateProxyView
android:id="@+id/voice_button_proxy"
android:layout_width="80dp"
android:layout_height="@dimen/qsb_bar_height"
android:layout_marginRight="@dimen/qsb_voice_proxy_padding_right"
android:layout_gravity="top|right"
android:clickable="true"
android:onClick="onClickVoiceButton"
android:importantForAccessibility="no"
launcher:sourceViewId="@+id/voice_button" />
<include layout="@layout/apps_customize_pane"<!-- 所有应用界面-->
android:id="@+id/apps_customize_pane"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="invisible" />
</com.android.launcher2.DragLayer>
</FrameLayout>
apps_customize_pane.xml
<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2011 The Android Open Source Project
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<com.android.launcher2.AppsCustomizeTabHost
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:launcher="http://schemas.android.com/apk/res/com.android.launcher">
<LinearLayout
android:id="@+id/apps_customize_content"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="gone"
android:layoutDirection="ltr">
<!-- The layout_width of the tab bar gets overriden to align the content
with the text in the tabs in AppsCustomizeTabHost. -->
<FrameLayout
android:id="@+id/tabs_container"
android:layout_width="wrap_content"
android:layout_height="@dimen/apps_customize_tab_bar_height"
android:layout_marginTop="@dimen/apps_customize_tab_bar_margin_top"
android:layout_gravity="center_horizontal">
<com.android.launcher2.FocusOnlyTabWidget
android:id="@android:id/tabs"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="left"
android:background="@drawable/tab_unselected_holo"
android:tabStripEnabled="false"
android:divider="@null" />
<include
android:id="@+id/market_button"
layout="@layout/market_button"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="right" />
</FrameLayout>
<FrameLayout <!-- 所有应用界面显示-->
android:id="@android:id/tabcontent"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.android.launcher2.AppsCustomizePagedView
android:id="@+id/apps_customize_pane_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
launcher:maxAppCellCountX="@integer/apps_customize_maxCellCountX"
launcher:maxAppCellCountY="@integer/apps_customize_maxCellCountY"
launcher:pageLayoutWidthGap="@dimen/apps_customize_pageLayoutWidthGap"
launcher:pageLayoutHeightGap="@dimen/apps_customize_pageLayoutHeightGap"
launcher:pageLayoutPaddingTop="@dimen/apps_customize_pageLayoutPaddingTop"
launcher:pageLayoutPaddingBottom="@dimen/apps_customize_pageLayoutPaddingBottom"
launcher:pageLayoutPaddingLeft="@dimen/apps_customize_pageLayoutPaddingLeft"
launcher:pageLayoutPaddingRight="@dimen/apps_customize_pageLayoutPaddingRight"
launcher:widgetCellWidthGap="@dimen/apps_customize_widget_cell_width_gap"
launcher:widgetCellHeightGap="@dimen/apps_customize_widget_cell_height_gap"
launcher:widgetCountX="@integer/apps_customize_widget_cell_count_x"
launcher:widgetCountY="@integer/apps_customize_widget_cell_count_y"
launcher:clingFocusedX="@integer/apps_customize_cling_focused_x"
launcher:clingFocusedY="@integer/apps_customize_cling_focused_y"
launcher:maxGap="@dimen/workspace_max_gap" />
<FrameLayout
android:id="@+id/animation_buffer"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="gone" />
<include
android:id="@+id/paged_view_indicator"
layout="@layout/scroll_indicator"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom" />
</FrameLayout>
</LinearLayout>
<include layout="@layout/all_apps_cling"<!-- 第一次进所以应用界面显示-->
android:id="@+id/all_apps_cling"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="gone" />
</com.android.launcher2.AppsCustomizeTabHost>
1、device\rockchip\rk30sdk\overlay\packages\apps\Launcher2\res\xml-sw720dp\default_workspace.xml等同于launcher相应目录下的文件，用来控制开机第一次加载的快捷方式和widage
<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2009 The Android Open Source Project
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<favorites xmlns:launcher="http://schemas.android.com/apk/res/com.android.launcher">
<!-- Far-left screen [0] -->
<!-- Left screen [1] -->
<appwidget
launcher:packageName="com.android.settings"
launcher:className="com.android.settings.widget.SettingsAppWidgetProvider"
launcher:screen="1"
launcher:x="0"
launcher:y="3"
launcher:spanX="4"
launcher:spanY="1" />
<!-- Middle screen [2] -->
<appwidget
launcher:packageName="com.android.deskclock"
launcher:className="com.android.alarmclock.AnalogAppWidgetProvider"
launcher:screen="2"
launcher:x="1"
launcher:y="0"
launcher:spanX="2"
launcher:spanY="2" />
<favorite
launcher:packageName="com.android.camera"
launcher:className="com.android.camera.Camera"
launcher:screen="2"
launcher:x="0"
launcher:y="3" />
<!-- Right screen [3] -->
<favorite
launcher:packageName="com.android.gallery3d"
launcher:className="com.android.gallery3d.app.Gallery"
launcher:screen="3"
launcher:x="1"
launcher:y="3" />
<favorite
launcher:packageName="com.android.settings"
launcher:className="com.android.settings.Settings"
launcher:screen="3"
launcher:x="2"
launcher:y="3" />
<!-- Far-right screen [4] -->
<!-- Hotseat -->
<favorite
launcher:packageName="com.android.gallery3d"
launcher:className="com.android.gallery3d.app.Gallery"
launcher:container="-101"
launcher:screen="2"
launcher:x="2"
launcher:y="0" />
<favorite
launcher:packageName="com.android.browser"
launcher:className="com.android.browser.BrowserActivity"
launcher:container="-101"
launcher:screen="3"
launcher:x="3"
launcher:y="0" />
<favorite
launcher:packageName="com.android.settings"
launcher:className="com.android.settings.Settings"
launcher:container="-101"
launcher:screen="5"
launcher:x="5"
launcher:y="0" />
<favorite
launcher:packageName="com.android.music"
launcher:className="com.android.music.MusicBrowserActivity"
launcher:container="-101"
launcher:screen="6"
launcher:x="6"
launcher:y="0" />
</favorites>
x ,y 表示相应网格中的位置,screen表示在第几屏，spanx、spany表示widget占的空间
2、packages\apps\Launcher2\res\values-sw720dp\config.xml
cell_count_x 表示一行可以显示多少个快捷方式
3、packages\apps\Launcher2\res\layout-land\launcher.xml
Workspace的defaultScreen表示缺省显示第几屏
4、显示壁纸
packages\apps\Launcher2\res\layout\apps_customize_pane.xml
去掉所有android:background="#FF000000"
另外\packages\apps\Launcher2\src\com\android\launcher2\Launcher.java所有调用updateWallpaperVisibility参数修改为true
还有showAppsCustomizeHelper函数中进行如下调整，要不下面的快捷方式在进入所有应用界面时消失会有延时
5、循环滚屏调整
调节Launch上 快捷方式的间距：
相应资源目录下dimens.xml 中workspace_cell_height_land