Android12 添加设置控制导航栏显示和状态栏下拉

添加key值

• 位置： frameworks/base/core/java/android/provider/Settings.java

 /**
  * Control navigation bar enabled
  */
  @Readable
  @SuppressLint("NoSettingsProvider")
  public static final String NAVIGATIONBAR_ENABLED = "navigationbar_enabled";

  /**
   * Supoort panel bar expand
   */
   @Readable
   @SuppressLint("NoSettingsProvider")
   public static final String SUPPORT_PANELBAR_EXPAND = "support_panelbar_expand";

Setting中添加相关设置项

• 位置：packages/apps/Settings/res/xml/display_settings.xml

  <SwitchPreference
       android:key="navigationbar_enabled"
       android:title="@string/navigationbar_enabled_title"
       settings:controller="com.android.settings.display.NavigationbarPreferenceController"/>

  <SwitchPreference
       android:key="support_panelbar_expand"
       android:title="@string/support_panelbar_expand_title"
       settings:controller="com.android.settings.display.SupportPanelbarExpandPreferenceController"/>  

• 位置：packages/apps/Settings/res/values/strings.xml

   <string name="navigationbar_enabled_title">Show navigation bar</string>
   <string name="support_panelbar_expand_title">Allows status bar drop-down</string>

• 位置：packages/apps/Settings/src/com/android/settings/display/NavigationbarPreferenceController.java

package com.android.settings.display;

import android.content.Context;
import android.text.TextUtils;

import androidx.preference.Preference;

import com.android.settings.core.TogglePreferenceController;
import com.android.settingslib.core.instrumentation.MetricsFeatureProvider;

import android.provider.Settings;

public class NavigationbarPreferenceController extends TogglePreferenceController implements
        Preference.OnPreferenceChangeListener {
   

    private static final String KEY_NAVIGATIONBAR = "navigationbar_enabled";

    private Context mContext;
    private Preference mPreference;

    public NavigationbarPreferenceController(Context context) {
   
        super(context