Android11 Launcher添加网格布局设置（3x3,4x4,5x5）

需求：长按workspace空白处，Home Settings添加launcher界面布局3x3，4x4，5x5设置

添加布局文件，当网格设置关闭时，所有设置项置灰不允许点击

源码：/vendor/mediatek/proprietary/packages/apps/Launcher3/res/xml/launcher_preferences.xml

 // add for grid options settings<PreferenceCategory android:key="grid_options_category"android:order="100"><SwitchPreferenceandroid:key="pref_grid_options"android:title="@string/grid_options"android:defaultValue="false"android:persistent="true" /><CheckBoxPreferenceandroid:dependency="pref_grid_options"android:persistent="true"android:key="3_by_3"android:title="3x3" />  <CheckBoxPreferenceandroid:dependency="pref_grid_options"android:persistent="true"android:key="4_by_4"android:title="4x4" /> <CheckBoxPreferenceandroid:dependency="pref_grid_options"android:persistent="true"android:key="5_by_5"android:title="5x5" /> </PreferenceCategory>     // end

使能GridOptionsProvider

源码：/vendor/mediatek/proprietary/packages/apps/Launcher3/AndroidManifest-common.xml

<!--The content provider for exposing various launcher grid options.TODO: Add proper permissions--><providerandroid:name="com.android.launcher3.graphics.GridOptionsProvider"android:authorities="${packageName}.grid_control"android:exported="true"android:enabled="true" />

Launcher布局切换设置功能

源码：/vendor/mediatek/proprietary/packages/apps/Launcher3/src/com/android/launcher3/settings/SettingsActivity.java

import com.android.launcher3.util.SecureSettingsObserver;// add for grid options settings
import com.android.launcher3.InvariantDeviceProfile;
import androidx.preference.CheckBoxPreference;
import android.content.Context;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.net.Uri;
// endpublic class SettingsActivity extends FragmentActivityimplements OnPreferenceStartFragmentCallback, OnPreferenceStartScreenCallback,SharedPreferences.OnSharedPreferenceChangeListener{..../*** This fragment shows the launcher preferences.*/public static class LauncherSettingsFragment extends PreferenceFragmentCompat implementsPreference.OnPreferenceChangeListener{// add for grid options settings  private InvariantDeviceProfile mInvariantDeviceProfile;private static final String KEY_GRIDNAME_3X3 = "3_by_3";private static final String KEY_GRIDNAME_4X4 = "4_by_4";private static final String KEY_GRIDNAME_5X5 = "5_by_5";     private CheckBoxPreference checkbox3by3;private CheckBoxPreference checkbox4by4;private CheckBoxPreference checkbox5by5;// end@Overridepublic void onCreatePreferences(Bundle savedInstanceState, String rootKey) {final Bundle args = getArguments();...// add for grid options settingsinitPreference();// end}@Overridepublic void onResume() {super.onResume();if (isAdded() && !mPreferenceHighlighted) {PreferenceHighlighter highlighter = createHighlighter();if (highlighter != null) {getView().postDelayed(highlighter, DELAY_HIGHLIGHT_DURATION_MILLIS);mPreferenceHighlighted = true;} else {requestAccessibilityFocus(getListView());}}// add for grid options settings mInvariantDeviceProfile = InvariantDeviceProfile.INSTANCE.get(getContext());updatePreference();// end}// add for grid options settings private void initPreference(){checkbox3by3 = (CheckBoxPreference)findPreference(KEY_GRIDNAME_3X3);checkbox3by3.setOnPreferenceChangeListener(this);checkbox4by4 = (CheckBoxPreference)findPreference(KEY_GRIDNAME_4X4);checkbox4by4.setOnPreferenceChangeListener(this);checkbox5by5 = (CheckBoxPreference)findPreference(KEY_GRIDNAME_5X5);checkbox5by5.setOnPreferenceChangeListener(this);updatePreference();}private void updatePreference(){String mGrigdName = mInvariantDeviceProfile.getCurrentGridName(getContext());checkbox3by3.setChecked((mGrigdName.equals(KEY_GRIDNAME_3X3)) ? true : false);checkbox4by4.setChecked((mGrigdName.equals(KEY_GRIDNAME_4X4)) ? true : false);checkbox5by5.setChecked((mGrigdName.equals(KEY_GRIDNAME_5X5)) ? true : false);}@Overridepublic boolean onPreferenceChange(Preference preference, Object newValue) {String key = preference.getKey();applyGrid(getContext(), key);updatePreference();return true;}    public int applyGrid(Context context, String name) {ContentValues values = new ContentValues();values.put("name", name);return context.getContentResolver().update(getUri(), values,null, null);}public Uri getUri() {return new Uri.Builder().scheme(ContentResolver.SCHEME_CONTENT).authority("com.android.launcher3.grid_control").appendPath("default_grid").build();}// end

All APP中布局更新

源码：vendor/mediatek/proprietary/packages/apps/Launcher3/src/com/android/launcher3/allapps/AlphabeticalAppsList.java

 private void refreshRecyclerView() {if (mAdapter != null) {// add for the layout of all apps is updated synchronously after the grid option is changedmAdapter.setAppsPerRow(mLauncher.getDeviceProfile().inv.numAllAppsColumns);//mAdapter.notifyDataSetChanged();}}

设置3x3布局，前一屏没占满就创建下一屏

vendor/mediatek/proprietary/packages/apps/Launcher3/src/com/android/launcher3/model/LoaderCursor.java

protected boolean checkItemPlacement(ItemInfo item) {....//去掉以下代码/* if (!occupied.containsKey(item.screenId)) {GridOccupancy screen = new GridOccupancy(countX + 1, countY + 1);if (item.screenId == Workspace.FIRST_SCREEN_ID) {// Mark the first row as occupied (if the feature is enabled)// in order to account for the QSB.screen.markCells(0, 0, countX + 1, 1, FeatureFlags.QSB_ON_FIRST_SCREEN);}occupied.put(item.screenId, screen);}*/final GridOccupancy occupancy = occupied.get(item.screenId);
}

添加以上代码，launcher布局切换的功能基本实现

点击3x3,4x4等设置项后，会走GridOptionsProvider的update方法

源码：/vendor/mediatek/proprietary/packages/apps/Launcher3/src/com/android/launcher3/graphics/GridOptionsProvider.java

@Overridepublic int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {if (!KEY_DEFAULT_GRID.equals(uri.getPath())) {return 0;}String gridName = values.getAsString(KEY_NAME);// Verify that this is a valid grid optionGridOption match = null;for (GridOption option : parseAllGridOptions()) {if (option.name.equals(gridName)) {match = option;break;}}if (match == null) {return 0;}InvariantDeviceProfile.INSTANCE.get(getContext()).setCurrentGrid(getContext(), gridName);return 1;}

然后会走到InvariantDeviceProfile的setCurrentGrid方法；下一步走到getPredefinedDeviceProfiles(Context context, String gridName)

 static ArrayList<DisplayOption> getPredefinedDeviceProfiles(Context context, String gridName) {ArrayList<DisplayOption> profiles = new ArrayList<>();try (XmlResourceParser parser = context.getResources().getXml(R.xml.device_profiles)) {final int depth = parser.getDepth();int type;while (((type = parser.next()) != XmlPullParser.END_TAG ||parser.getDepth() > depth) && type != XmlPullParser.END_DOCUMENT) {if ((type == XmlPullParser.START_TAG)&& GridOption.TAG_NAME.equals(parser.getName())) {GridOption gridOption = new GridOption(context, Xml.asAttributeSet(parser));...

device_profiles

<profiles xmlns:launcher="http://schemas.android.com/apk/res-auto" ><grid-optionlauncher:name="3_by_3"launcher:numRows="3"launcher:numColumns="3"launcher:numFolderRows="2"launcher:numFolderColumns="3"launcher:numHotseatIcons="3"launcher:dbFile="launcher_3_by_3.db"launcher:defaultLayoutId="@xml/default_workspace_3x3" ><display-optionlauncher:name="Super Short Stubby"launcher:minWidthDps="255"launcher:minHeightDps="300"launcher:iconImageSize="48"launcher:iconTextSize="13.0"launcher:canBeDefault="true" /><display-optionlauncher:name="Shorter Stubby"launcher:minWidthDps="255"launcher:minHeightDps="400"launcher:iconImageSize="48"launcher:iconTextSize="13.0"launcher:canBeDefault="true" /></grid-option>

根据我们设置的grid_options名字匹配默认加载的布局文件

Android11 Launcher添加网格布局设置（3x3,4x4,5x5）相关推荐

android动态添加网格布局,android – 动态网格布局
您可以动态生成GridView. GridView将根据您的需要包含ImageView和TextView.您必须使用自定义适配器.在它的getView方法中,填充ImageView和TextView. ...
css grid网格布局设置行间距和列间距
grid-gap:15px 13px; //行间距列间距
java：布局方法（网格布局）
网格布局一.简单说明二.关键代码三.流程图四.例子说明 1. 有17个"按钮"排列 (1)源码A (2)运行效果 2. 有36个"按钮"排列 (1)源码 ...
【鸿蒙 HarmonyOS】UI 布局 ( 网格布局 TableLayout )
文章目录一.网格布局 TableLayout 一.网格布局 TableLayout 网格布局需要设置整个布局中有多少行 , 多少列 , 每个单元格都可以设置一个组件 , 这个组件可以是单个 , 也 ...
网格布局java_Java 网格布局
/* * 网络布局 * */ package com.swing; import java.awt.GridLayout; import javax.swing.JButton; import jav ...
一个设置容器和网格布局的小技巧
查看bootstrap实现网格布局的源码,可以发现: 网格容器(类属性.container或者.container-fluid标识的元素),网格中的行(.row标识的元素)都包括了一个和类属性.cle ...
jpanel网格布局添加滚动条_jpanel 上下布局
[解析] 本题考查Java中的布局管理器.FlowLayout是Pane和Applet默认的布局管理器,构件在容器中从上到下.从左到右进行放置,所以选项C为正确答案.BorderLayout是Wi.. ...
android网格布局间隙,RecyclerView网格布局瀑布流布局设置间距
RecyclerView在网格布局或者瀑布流布局下,如果要设置间距,可以使用ItemDecoration. 下面的代码是设置显示两列数据RecyclerView的情况. cat.png @Overri ...
css grid设置宽度,如何设置Grid Layout （网格布局）列的最小宽度
如何设置Grid Layout (网格布局)列的最小宽度?设置网格的列最小宽度时,在网格的列宽设置部分中使用minmax()函数,下面我们就来看具体的内容. 我们先来看一下minmax()函数的格式m ...

Android11 Launcher添加网格布局设置（3x3,4x4,5x5）

Android11 Launcher添加网格布局设置（3x3,4x4,5x5）相关推荐

最新文章

热门文章