![[高通MSM8909][Android8.1]虚拟导航栏增加音量加减按钮](https://1500zi.500zi.com/uploadfile/img/15/601/aa4e32c2b0c8c1016d3c3249ec2e0b2e.jpg)
文章目录
开发平台基本信息问题描述解决方法1. 增加按钮图片资源2.修改配置文件3. 修改配置逻辑4. 延伸说明开发平台基本信息
芯片:MSM8909
版本:Android 8.1
kernel:msm-3.18
问题描述
没有实体按键的机器，没办法快速调节音量大小，所以，需要在虚拟导航栏的左右两侧各添加一个按钮，一个控制音量增加，一个控制音量减少。
解决方法
效果图如下：
1. 增加按钮图片资源
diff --git a/frameworks/base/packages/SystemUI/res/drawable/ic_increase_volume.xml b/frameworks/base/packages/SystemUI/res/drawable/ic_increase_volume.xmlnew file mode 100755index 0000000..1952a62--- /dev/null+++ b/frameworks/base/packages/SystemUI/res/drawable/ic_increase_volume.xml@@ -0,0 +1,12 @@+<vector android:height="20dp" android:viewportHeight="32"^M+ android:viewportWidth="32" android:width="20dp" xmlns:android="/apk/res/android">^M+ <path android:fillColor="#00000000" android:fillType="evenOdd"^M+ android:pathData="M3,11.2309L3,20.3223C3,21.1672 3.5329,21.6157 4.3987,21.6719C6.3953,21.8013 9.8423,21.6719 9.8423,21.6719C9.8423,21.6719 14.474,24.5182 17.2825,26.7888C18.3299,27.6359 19.9198,27.5838 19.9198,25.766C19.9198,20.4699 19.9154,10.0464 19.9154,5.5095C19.9154,3.7479 18.3727,3.667 17.2132,4.5549C14.3441,6.7523 9.8423,9.9895 9.8423,9.9895L4.3987,9.9895C3.2982,9.9887 3,10.4731 3,11.2309Z"^M+ android:strokeColor="#FFFFFF" android:strokeWidth="3"/>^M+ <path android:fillColor="#00000000" android:fillType="evenOdd"^M+ android:pathData="M22,23.9815C26.3586,23.9815 29.4304,20.2722 29.4304,15.9803C29.4304,11.6884 25.7152,8 22,8"^M+ android:strokeColor="#FFFFFF" android:strokeWidth="3"/>^M+ <path android:fillColor="#FFFFFF" android:fillType="nonZero"^M+ android:pathData="M22,21C24.7614,21 27,18.7614 27,16C27,13.2386 24.7614,11 22,11C22,12.4064 22,17.6225 22,21Z"^M+ android:strokeColor="#00000000" android:strokeWidth="1"/>^M+</vector>\ No newline at end of filediff --git a/frameworks/base/packages/SystemUI/res/drawable/ic_increase_volume_dark.xml b/frameworks/base/packages/SystemUI/res/drawable/ic_increase_volume_dark.xmlnew file mode 100755index 0000000..44ba0b9--- /dev/null+++ b/frameworks/base/packages/SystemUI/res/drawable/ic_increase_volume_dark.xml@@ -0,0 +1,12 @@+<vector android:height="20dp" android:viewportHeight="32"^M+ android:viewportWidth="32" android:width="20dp" xmlns:android="/apk/res/android">^M+ <path android:fillColor="#00000000" android:fillType="evenOdd"^M+ android:pathData="M3,11.2309L3,20.3223C3,21.1672 3.5329,21.6157 4.3987,21.6719C6.3953,21.8013 9.8423,21.6719 9.8423,21.6719C9.8423,21.6719 14.474,24.5182 17.2825,26.7888C18.3299,27.6359 19.9198,27.5838 19.9198,25.766C19.9198,20.4699 19.9154,10.0464 19.9154,5.5095C19.9154,3.7479 18.3727,3.667 17.2132,4.5549C14.3441,6.7523 9.8423,9.9895 9.8423,9.9895L4.3987,9.9895C3.2982,9.9887 3,10.4731 3,11.2309Z"^M+ android:strokeColor="#5E5E5E" android:strokeWidth="3"/>^M+ <path android:fillColor="#00000000" android:fillType="evenOdd"^M+ android:pathData="M22,23.9815C26.3586,23.9815 29.4304,20.2722 29.4304,15.9803C29.4304,11.6884 25.7152,8 22,8"^M+ android:strokeColor="#5E5E5E" android:strokeWidth="3"/>^M+ <path android:fillColor="#5E5E5E" android:fillType="nonZero"^M+ android:pathData="M22,21C24.7614,21 27,18.7614 27,16C27,13.2386 24.7614,11 22,11C22,12.4064 22,17.6225 22,21Z"^M+ android:strokeColor="#00000000" android:strokeWidth="1"/>^M+</vector>\ No newline at end of filediff --git a/frameworks/base/packages/SystemUI/res/drawable/ic_lower_volume.xml b/frameworks/base/packages/SystemUI/res/drawable/ic_lower_volume.xmlnew file mode 100755index 0000000..3055b7e--- /dev/null+++ b/frameworks/base/packages/SystemUI/res/drawable/ic_lower_volume.xml@@ -0,0 +1,9 @@+<vector android:height="20dp" android:viewportHeight="32"^M+ android:viewportWidth="32" android:width="20dp" xmlns:android="/apk/res/android">^M+ <path android:fillColor="#00000000" android:fillType="evenOdd"^M+ android:pathData="M4,11.2309L4,20.3223C4,21.1672 4.5329,21.6157 5.3987,21.6719C7.3953,21.8013 10.8423,21.6719 10.8423,21.6719C10.8423,21.6719 15.474,24.5182 18.2825,26.7888C19.3299,27.6359 20.9198,27.5838 20.9198,25.766C20.9198,20.4699 20.9154,10.0464 20.9154,5.5095C20.9154,3.7479 19.3727,3.667 18.2132,4.5549C15.3441,6.7523 10.8423,9.9895 10.8423,9.9895L5.3987,9.9895C4.2982,9.9887 4,10.4731 4,11.2309Z"^M+ android:strokeColor="#FFFFFF" android:strokeWidth="3"/>^M+ <path android:fillColor="#00000000" android:fillType="evenOdd"^M+ android:pathData="M23.7446,21.9616C26.6705,20.678 28.8996,19.1251 28.8996,15.8254C28.8996,12.5257 26.6705,10.9729 23.7446,9.69"^M+ android:strokeColor="#FFFFFF" android:strokeWidth="3"/>^M+</vector>\ No newline at end of filediff --git a/frameworks/base/packages/SystemUI/res/drawable/ic_lower_volume_dark.xml b/frameworks/base/packages/SystemUI/res/drawable/ic_lower_volume_dark.xmlnew file mode 100755index 0000000..81cff82--- /dev/null+++ b/frameworks/base/packages/SystemUI/res/drawable/ic_lower_volume_dark.xml@@ -0,0 +1,9 @@+<vector android:height="20dp" android:viewportHeight="32"^M+ android:viewportWidth="32" android:width="20dp" xmlns:android="/apk/res/android">^M+ <path android:fillColor="#00000000" android:fillType="evenOdd"^M+ android:pathData="M4,11.2309L4,20.3223C4,21.1672 4.5329,21.6157 5.3987,21.6719C7.3953,21.8013 10.8423,21.6719 10.8423,21.6719C10.8423,21.6719 15.474,24.5182 18.2825,26.7888C19.3299,27.6359 20.9198,27.5838 20.9198,25.766C20.9198,20.4699 20.9154,10.0464 20.9154,5.5095C20.9154,3.7479 19.3727,3.667 18.2132,4.5549C15.3441,6.7523 10.8423,9.9895 10.8423,9.9895L5.3987,9.9895C4.2982,9.9887 4,10.4731 4,11.2309Z"^M+ android:strokeColor="#5E5E5E" android:strokeWidth="3"/>^M+ <path android:fillColor="#00000000" android:fillType="evenOdd"^M+ android:pathData="M23.7446,21.9616C26.6705,20.678 28.8996,19.1251 28.8996,15.8254C28.8996,12.5257 26.6705,10.9729 23.7446,9.69"^M+ android:strokeColor="#5E5E5E" android:strokeWidth="3"/>^M+</vector>\ No newline at end of filediff --git a/packages/SystemUI/res/layout/increase_volume.xml b/packages/SystemUI/res/layout/increase_volume.xmlnew file mode 100755index 0000000..eb3f3f5--- /dev/null+++ b/frameworks/base/packages/SystemUI/res/layout/increase_volume.xml@@ -0,0 +1,14 @@+<?xml version="1.0" encoding="utf-8"?>^M+<com.android.systemui.statusbar.policy.KeyButtonView^M+xmlns:android="/apk/res/android"^M+xmlns:systemui="/apk/res-auto"^M+android:id="@+id/increase"^M+android:layout_width="@dimen/navigation_key_width"^M+android:layout_height="match_parent"^M+android:layout_weight="0"^M+systemui:keyCode="24"^M+android:scaleType="center"^M+android:contentDescription="@string/accessibility_home"^M+android:paddingStart="@dimen/navigation_key_padding"^M+android:paddingEnd="@dimen/navigation_key_padding"^M+/>\ No newline at end of filediff --git a/frameworks/base/packages/SystemUI/res/layout/lower_volume.xml b/frameworks/base/packages/SystemUI/res/layout/lower_volume.xmlnew file mode 100755index 0000000..0f0149d--- /dev/null+++ b/frameworks/base/packages/SystemUI/res/layout/lower_volume.xml@@ -0,0 +1,14 @@+<?xml version="1.0" encoding="utf-8"?>^M+<com.android.systemui.statusbar.policy.KeyButtonView^M+xmlns:android="/apk/res/android"^M+xmlns:systemui="/apk/res-auto"^M+android:id="@+id/lower"^M+android:layout_width="@dimen/navigation_key_width"^M+android:layout_height="match_parent"^M+android:layout_weight="0"^M+systemui:keyCode="25"^M+android:scaleType="center"^M+android:contentDescription="@string/accessibility_home"^M+android:paddingStart="@dimen/navigation_key_padding"^M+android:paddingEnd="@dimen/navigation_key_padding"^M+/>
2.修改配置文件
配置文件不仅仅要修改values目录下的，其他分辨率下的配置文件也要修改，不然如果系统运行在其他大屏的设备下，就会系统奔溃或者出现其他问题。
diff --git a/packages/SystemUI/res/values-sw372dp/config.xml b/packages/SystemUI/res/values-sw372dp/config.xmlold mode 100644new mode 100755index 07b797a..e375a4f--- a/packages/SystemUI/res/values-sw372dp/config.xml+++ b/packages/SystemUI/res/values-sw372dp/config.xml@@ -21,5 +21,5 @@for different hardware and product builds. --><resources><!-- Nav bar button default ordering/layout -->- <string name="config_navBarLayout" translatable="false">left[.25W],back[.5WC];home;recent[.5WC],right[.25W]</string>+ <string name="config_navBarLayout" translatable="false">lower;back;home;recent;increase</string></resources>diff --git a/packages/SystemUI/res/values-sw600dp/config.xml b/packages/SystemUI/res/values-sw600dp/config.xmlold mode 100644new mode 100755index 63b9d75..85dc580--- a/packages/SystemUI/res/values-sw600dp/config.xml+++ b/packages/SystemUI/res/values-sw600dp/config.xml@@ -34,7 +34,7 @@<bool name="config_keyguardUserSwitcher">true</bool><!-- Nav bar button default ordering/layout -->- <string name="config_navBarLayout" translatable="false">left;back,home,recent;right</string>+ <string name="config_navBarLayout" translatable="false">lower;back;home;recent;increase</string><!-- Animation duration when using long press on recents to dock --><integer name="long_press_dock_anim_duration">290</integer>diff --git a/packages/SystemUI/res/values-sw900dp/config.xml b/packages/SystemUI/res/values-sw900dp/config.xmlold mode 100644new mode 100755index 221b013..33e0d65--- a/packages/SystemUI/res/values-sw900dp/config.xml+++ b/packages/SystemUI/res/values-sw900dp/config.xml@@ -19,6 +19,6 @@<resources><!-- Nav bar button default ordering/layout -->- <string name="config_navBarLayout" translatable="false">back,home,left;space;right,recent</string>+ <string name="config_navBarLayout" translatable="false">lower;back;home;recent;increase</string></resources>diff --git a/packages/SystemUI/res/values/config.xml b/packages/SystemUI/res/values/config.xmlindex de159f0..a27250a 100755--- a/packages/SystemUI/res/values/config.xml+++ b/packages/SystemUI/res/values/config.xml@@ -343,7 +343,7 @@<string name="config_systemUIFactoryComponent" translatable="false">com.android.systemui.SystemUIFactory</string><!-- Nav bar button default ordering/layout -->- <string name="config_navBarLayout" translatable="false">left[.5W],back[1WC];home;recent[1WC],right[.5W]</string>+ <string name="config_navBarLayout" translatable="false">lower;back;home;recent;increase</string><bool name="quick_settings_show_full_alarm">false</bool>
3. 修改配置逻辑
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarInflaterView.java+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarInflaterView.java@@ -52,6 +52,8 @@ public class NavigationBarInflaterView extends FrameLayoutimplements Tunable, PluginListener<NavBarButtonProvider> {private static final String TAG = "NavBarInflater";+ public static final String LOWER = "lower";+ public static final String INCREASE = "increase";public static final String NAV_BAR_VIEWS = "sysui_nav_bar";public static final String NAV_BAR_LEFT = "sysui_nav_bar_left";@@ -218,11 +220,16 @@ public class NavigationBarInflaterView extends FrameLayoutif (newLayout == null) {newLayout = getDefaultLayout();}- String[] sets = newLayout.split(GRAVITY_SEPARATOR, 3);- String[] start = sets[0].split(BUTTON_SEPARATOR);- String[] center = sets[1].split(BUTTON_SEPARATOR);- String[] end = sets[2].split(BUTTON_SEPARATOR);+ String[] sets = newLayout.split(GRAVITY_SEPARATOR, 5);+String[] lower = sets[0].split(BUTTON_SEPARATOR);+ String[] start = sets[1].split(BUTTON_SEPARATOR);+ String[] center = sets[2].split(BUTTON_SEPARATOR);+ String[] end = sets[3].split(BUTTON_SEPARATOR);+String[] increase = sets[4].split(BUTTON_SEPARATOR);// Inflate these in start to end order or accessibility traversal will be messed up.+inflateButtons(lower, mRot0.findViewById(R.id.ends_group), isRot0Landscape, false);+ inflateButtons(lower, mRot90.findViewById(R.id.ends_group), !isRot0Landscape, false);+inflateButtons(start, mRot0.findViewById(R.id.ends_group), isRot0Landscape, true);inflateButtons(start, mRot90.findViewById(R.id.ends_group), !isRot0Landscape, true);@@ -234,6 +241,9 @@ public class NavigationBarInflaterView extends FrameLayoutinflateButtons(end, mRot0.findViewById(R.id.ends_group), isRot0Landscape, false);inflateButtons(end, mRot90.findViewById(R.id.ends_group), !isRot0Landscape, false);++inflateButtons(increase, mRot0.findViewById(R.id.ends_group), isRot0Landscape, false);+ inflateButtons(increase, mRot90.findViewById(R.id.ends_group), !isRot0Landscape, false);}private void addGravitySpacer(LinearLayout layout) {@@ -326,6 +336,10 @@ public class NavigationBarInflaterView extends FrameLayoutv = inflater.inflate(R.layout.home, parent, false);} else if (BACK.equals(button)) {v = inflater.inflate(R.layout.back, parent, false);+ }else if (LOWER.equals(button)) {+ v = inflater.inflate(R.layout.lower_volume, parent, false);+ }else if (INCREASE.equals(button)) {+ v = inflater.inflate(R.layout.increase_volume, parent, false);} else if (RECENT.equals(button)) {v = inflater.inflate(R.layout.recent_apps, parent, false);} else if (MENU_IME.equals(button)) {diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.javaindex 50e801c..6ffdc19 100755--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java@@ -93,6 +93,8 @@ public class NavigationBarView extends FrameLayout implements PluginListener<Navprivate KeyButtonDrawable mImeIcon;private KeyButtonDrawable mMenuIcon;private KeyButtonDrawable mAccessibilityIcon;+ private KeyButtonDrawable mLowerVolumeIcon;+ private KeyButtonDrawable mIncreaseVolumeIcon;private GestureHelper mGestureHelper;private DeadZone mDeadZone;@@ -214,15 +216,25 @@ public class NavigationBarView extends FrameLayout implements PluginListener<NavupdateIcons(context, Configuration.EMPTY, mConfiguration);mBarTransitions = new NavigationBarTransitions(this);-+ +mButtonDispatchers.put(R.id.lower, new ButtonDispatcher(R.id.lower));mButtonDispatchers.put(R.id.back, new ButtonDispatcher(R.id.back));mButtonDispatchers.put(R.id.home, new ButtonDispatcher(R.id.home));mButtonDispatchers.put(R.id.recent_apps, new ButtonDispatcher(R.id.recent_apps));+mButtonDispatchers.put(R.id.increase, new ButtonDispatcher(R.id.increase));mButtonDispatchers.put(R.id.menu, new ButtonDispatcher(R.id.menu));mButtonDispatchers.put(R.id.ime_switcher, new ButtonDispatcher(R.id.ime_switcher));mButtonDispatchers.put(R.id.accessibility_button,new ButtonDispatcher(R.id.accessibility_button));}+ + public ButtonDispatcher getLower_VolumeButton() {+ return mButtonDispatchers.get(R.id.lower);+ }+ + public ButtonDispatcher getIncrease_VolumeButton() {+ return mButtonDispatchers.get(R.id.increase);+ }public BarTransitions getBarTransitions() {return mBarTransitions;@@ -331,6 +343,10 @@ public class NavigationBarView extends FrameLayout implements PluginListener<NavmRecentIcon = getDrawable(ctx,R.drawable.ic_sysbar_recent, R.drawable.ic_sysbar_recent);mMenuIcon = getDrawable(ctx, R.drawable.ic_sysbar_menu, R.drawable.ic_sysbar_menu);+ mLowerVolumeIcon = getDrawable(ctx,+R.drawable.ic_lower_volume, R.drawable.ic_lower_volume);+ mIncreaseVolumeIcon = getDrawable(ctx,+R.drawable.ic_increase_volume, R.drawable.ic_increase_volume);mAccessibilityIcon = getDrawable(ctx, R.drawable.ic_sysbar_accessibility_button,R.drawable.ic_sysbar_accessibility_button);@@ -423,6 +439,8 @@ public class NavigationBarView extends FrameLayout implements PluginListener<Nav!= 0);getImeSwitchButton().setVisibility(showImeButton ? View.VISIBLE : View.INVISIBLE);getImeSwitchButton().setImageDrawable(mImeIcon);+getLower_VolumeButton().setImageDrawable(mLowerVolumeIcon);+getIncrease_VolumeButton().setImageDrawable(mIncreaseVolumeIcon);// Update menu button in case the IME state has changed.setMenuVisibility(mShowMenu, true);@@ -452,6 +470,9 @@ public class NavigationBarView extends FrameLayout implements PluginListener<Nav|| ((disabledFlags & View.STATUS_BAR_DISABLE_RECENT) != 0);final boolean disableBack = ((disabledFlags & View.STATUS_BAR_DISABLE_BACK) != 0)&& ((mNavigationIconHints & StatusBarManager.NAVIGATION_HINT_BACK_ALT) == 0);+ + boolean disableLowerVolume = true;+boolean disableIncreaseVolume = true;ViewGroup navButtons = (ViewGroup) getCurrentView().findViewById(R.id.nav_buttons);if (navButtons != null) {@@ -467,10 +488,18 @@ public class NavigationBarView extends FrameLayout implements PluginListener<Nav// Unless home is hidden, then in DPM locked mode and no exit available.disableRecent = false;}++String internalModel = SystemProperties.get("ro.internal.model","unknown");+ // 这里根据型号判断，不需要的设备就不显示+ if(internalModel.equals("custom")){+ disableLowerVolume = false;+ disableIncreaseVolume = false;+ }getBackButton().setVisibility(disableBack? View.INVISIBLE : View.VISIBLE);getHomeButton().setVisibility(disableHome? View.INVISIBLE : View.VISIBLE);getRecentsButton().setVisibility(disableRecent ? View.INVISIBLE : View.VISIBLE);+getLower_VolumeButton().setVisibility(disableLowerVolume ? View.GONE : View.VISIBLE);+getIncrease_VolumeButton().setVisibility(disableIncreaseVolume ? View.GONE : View.VISIBLE);}private boolean inLockTask() {
4. 延伸说明
从上面的补丁看，貌似没看到音量键的点击事件，那么是怎么做到，点击左边按钮减少音量，点击右边按钮增加音量的呢？其实，很简单，就是在按钮布局中，有这么一句话：systemui:keyCode="25"；这句话的意思就是，点击的时候，模拟按键，上报按键事件是25；按键值与对应事件在Keyevent.java这个类中声明，路径是frameworks/base/core/java/android/view/KeyEvent.java；在这个类中搜索24、25对应的事件，刚好是对应音量的加、减。
/** Key code constant: Directional Pad Center key.* May also be synthesized from trackball motions. */public static final int KEYCODE_DPAD_CENTER= 23;/** Key code constant: Volume Up key.* Adjusts the speaker volume up. */public static final int KEYCODE_VOLUME_UP = 24;/** Key code constant: Volume Down key.* Adjusts the speaker volume down. */public static final int KEYCODE_VOLUME_DOWN= 25;/** Key code constant: Power key. */public static final int KEYCODE_POWER = 26;
