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Android 7.1 导航栏增加按键

2020年07月27日 | 移动技术网IT编程 | 我要评论

需求说明

导航栏增加按键

平台:

rk3399 + Android 7.1

实现

1.导航栏增加按键

frameworks/base/packages/SystemUI/res/drawable-nodpi/ic_sysbar_back.png
frameworks/base/packages/SystemUI/res/values/strings.xml

添加strings,xml字符串
<string name="accessibility_power" translatable="false">Power</string>

2.增加按键layout.

|-- frameworks/base/packages/SystemUI/res/layout/power.xml

<com.android.systemui.statusbar.policy.KeyButtonView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:systemui="http://schemas.android.com/apk/res-auto"
    android:id="@+id/power"
    android:layout_width="@dimen/navigation_key_width"
    android:layout_height="match_parent"
    android:layout_weight="0"
    android:src="@drawable/ic_sysbar_back"
    systemui:keyCode="0"
    android:scaleType="center"
    android:contentDescription="@string/accessibility_power"
    android:paddingStart="@dimen/navigation_key_padding"
    android:paddingEnd="@dimen/navigation_key_padding"
    />

其中, keyCode是按键值, 若不想处理为按键, 则置为0

3.在NavigationBarView中添加Layout

（1）添加导航栏按键集合

|-- frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java

    public NavigationBarView(Context context, AttributeSet attrs) {
        super(context, attrs);

        mDisplay = ((WindowManager) context.getSystemService(
                Context.WINDOW_SERVICE)).getDefaultDisplay();

        mVertical = false;
        mShowMenu = false;
        mGestureHelper = new NavigationBarGestureHelper(context);

        mConfiguration = new Configuration();
        mConfiguration.updateFrom(context.getResources().getConfiguration());
        updateIcons(context, Configuration.EMPTY, mConfiguration);

        mBarTransitions = new NavigationBarTransitions(this);

        mButtonDisatchers.put(R.id.back, new ButtonDispatcher(R.id.back));
        mButtonDisatchers.put(R.id.home, new ButtonDispatcher(R.id.home));
        mButtonDisatchers.put(R.id.recent_apps, new ButtonDispatcher(R.id.recent_apps));
        mButtonDisatchers.put(R.id.menu, new ButtonDispatcher(R.id.menu));
        mButtonDisatchers.put(R.id.ime_switcher, new ButtonDispatcher(R.id.ime_switcher));
        mButtonDisatchers.put(R.id.screenshot, new ButtonDispatcher(R.id.screenshot));
        mButtonDisatchers.put(R.id.volume_add, new ButtonDispatcher(R.id.volume_add));
        mButtonDisatchers.put(R.id.volume_sub, new ButtonDispatcher(R.id.volume_sub));

         
    //添加到集合.
        mButtonDisatchers.put(R.id.power, new ButtonDispatcher(R.id.power));

    }

//供外部调用
    public ButtonDispatcher getPowerButton() {
        return mButtonDisatchers.get(R.id.power);
    }

（2）默认按键布局config_navBarLayout定义:

	frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarInflaterView.java:        return mContext.getString(R.string.config_navBarLayout);
	frameworks/base/packages/SystemUI/src/com/android/systemui/tuner/NavBarTuner.java:            navLayout = context.getString(R.string.config_navBarLayout);
	frameworks/base/packages/SystemUI/res/values/config.xml:    <string name="config_navBarLayout" translatable="false">space;volume_sub,back,home,recent,volume_add,screenshot;menu_ime</string>
	frameworks/base/packages/SystemUI/res/values-sw600dp/config.xml:    <string name="config_navBarLayout" translatable="false">space;volume_sub,back,home,recent,volume_add,screenshot;menu_ime</string>
	frameworks/base/packages/SystemUI/res/values-sw900dp/config.xml:    <string name="config_navBarLayout" translatable="false">space;volume_sub,back,home,recent,volume_add,screenshot;menu_ime</string>

增加导航栏个数:

diff --git a/frameworks/base/packages/SystemUI/res/values-sw600dp/config.xml b/frameworks/base/packages/SystemUI/res/values-sw600dp/config.xml
old mode 100644
new mode 100755
index aa03ab2..ef41fee
--- a/frameworks/base/packages/SystemUI/res/values-sw600dp/config.xml
+++ b/frameworks/base/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">space;volume_sub,back,home,recent,volume_add,screenshot;menu_ime</string>
+    <string name="config_navBarLayout" translatable="false">space;volume_sub,back,home,recent,volume_add,screenshot,power;menu_ime</string>
 
     <!-- Animation duration when using long press on recents to dock -->
     <integer name="long_press_dock_anim_duration">290</integer>
diff --git a/frameworks/base/packages/SystemUI/res/values-sw900dp/config.xml b/frameworks/base/packages/SystemUI/res/values-sw900dp/config.xml
old mode 100644
new mode 100755
index 016f7e5..c992349
--- a/frameworks/base/packages/SystemUI/res/values-sw900dp/config.xml
+++ b/frameworks/base/packages/SystemUI/res/values-sw900dp/config.xml
@@ -19,6 +19,6 @@
 <resources>
 
     <!-- Nav bar button default ordering/layout -->
-    <string name="config_navBarLayout" translatable="false">space;volume_sub,back,home,recent,volume_add,screenshot;menu_ime</string>
+    <string name="config_navBarLayout" translatable="false">space;volume_sub,back,home,recent,volume_add,screenshot,power;menu_ime</string>
 
 </resources>
diff --git a/frameworks/base/packages/SystemUI/res/values/config.xml b/frameworks/base/packages/SystemUI/res/values/config.xml
old mode 100644
new mode 100755
index da5f4bf..59e7161
--- a/frameworks/base/packages/SystemUI/res/values/config.xml
+++ b/frameworks/base/packages/SystemUI/res/values/config.xml
@@ -280,7 +280,7 @@
     <string name="config_systemUIFactoryComponent" translatable="false">com.android.systemui.SystemUIFactory</string>
 
     <!-- Nav bar button default ordering/layout -->
-    <string name="config_navBarLayout" translatable="false">space;volume_sub,back,home,recent,volume_add,screenshot;menu_ime</string>
+    <string name="config_navBarLayout" translatable="false">space;volume_sub,back,home,recent,volume_add,screenshot,power;menu_ime</string>
 
     <bool name="quick_settings_show_full_alarm">false</bool>

（3）加载Layout:

|-- frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarInflaterView.java

	public static final String POWER = "power";
//加载按键
    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();
        inflateChildren();
        clearViews();
        inflateLayout(getDefaultLayout());
    }
//默认按键
    protected String getDefaultLayout() {
        return mContext.getString(R.string.config_navBarLayout);
    }

    protected void inflateLayout(String newLayout) {
        mCurrentLayout = newLayout;
        if (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);
        // Inflate these in start to end order or accessibility traversal will be messed up.
        inflateButtons(start, (ViewGroup) mRot0.findViewById(R.id.ends_group), isRot0Landscape);
        inflateButtons(start, (ViewGroup) mRot90.findViewById(R.id.ends_group), !isRot0Landscape);
        LinearLayout centerLayout = (LinearLayout)mRot0.findViewById(R.id.center_group);
        mIsReverseInflateRot0 = !isRot0Landscape && !isSw600Dp() && mCurrentOrientation == Configuration.ORIENTATION_LANDSCAPE;
        if(mIsReverseInflateRot0)
            centerLayout.setOrientation(LinearLayout.VERTICAL);
        inflateButtons(center, centerLayout, isRot0Landscape);
        mIsReverseInflateRot0 = false;
        centerLayout = (LinearLayout)mRot90.findViewById(R.id.center_group);
        mIsReverseInflateRot90 = !isRot0Landscape && !isSw600Dp() && mCurrentOrientation == Configuration.ORIENTATION_PORTRAIT;
        if(mIsReverseInflateRot90)
            centerLayout.setOrientation(LinearLayout.HORIZONTAL);
        inflateButtons(center, centerLayout, !isRot0Landscape);
        mIsReverseInflateRot90 = false;
        addGravitySpacer((LinearLayout) mRot0.findViewById(R.id.ends_group));
        addGravitySpacer((LinearLayout) mRot90.findViewById(R.id.ends_group));

        inflateButtons(end, (ViewGroup) mRot0.findViewById(R.id.ends_group), isRot0Landscape);
        inflateButtons(end, (ViewGroup) mRot90.findViewById(R.id.ends_group), !isRot0Landscape);
    }

//加入导航栏
    @Nullable
    protected View inflateButton(String buttonSpec, ViewGroup parent, boolean landscape) {
        LayoutInflater inflater = landscape ? mLandscapeInflater : mLayoutInflater;
        float size = extractSize(buttonSpec);
        String button = extractButton(buttonSpec);
        View v = null;
        if (HOME.equals(button)) {
            v = inflater.inflate(R.layout.home, parent, false);
            if (landscape && isSw600Dp()) {
                setupLandButton(v);
            }
        } else if (BACK.equals(button)) {
            v = inflater.inflate(R.layout.back, parent, false);
            if (landscape && isSw600Dp()) {
                setupLandButton(v);
            }
        } else if (RECENT.equals(button)) {
            v = inflater.inflate(R.layout.recent_apps, parent, false);
            if (landscape && isSw600Dp()) {
                setupLandButton(v);
            }
        } else if (SCREENSHOT.equals(button)) {
            v = inflater.inflate(R.layout.screenshot, parent, false);
            if (landscape && isSw600Dp()) {
                setupLandButton(v);
            }
//下面增加POWER按键, layout.power.xml也是在这里使用
        }else if (POWER.equals(button)) {

            v = inflater.inflate(R.layout.power, parent, false);
            if (landscape && isSw600Dp()) {
                setupLandButton(v);
            }

        } else if (VOLUME_ADD.equals(button)) {
            v = inflater.inflate(R.layout.volume_add, parent, false);
            if (landscape && isSw600Dp()) {
                setupLandButton(v);
            }
        } else if (VOLUME_SUB.equals(button)) {
            v = inflater.inflate(R.layout.volume_sub, parent, false);
            if (landscape && isSw600Dp()) {
                setupLandButton(v);
            }
        } else if (MENU_IME.equals(button)) {
            v = inflater.inflate(R.layout.menu_ime, parent, false);
        } else if (NAVSPACE.equals(button)) {
            v = inflater.inflate(R.layout.nav_key_space, parent, false);
        } else if (CLIPBOARD.equals(button)) {
            v = inflater.inflate(R.layout.clipboard, parent, false);
        } else if (button.startsWith(KEY)) {
            String uri = extractImage(button);
            int code = extractKeycode(button);
            v = inflater.inflate(R.layout.custom_key, parent, false);
            ((KeyButtonView) v).setCode(code);
            if (uri != null) {
                ((KeyButtonView) v).loadAsync(uri);
            }
        } else {
            return null;
        }

        if (size != 0) {
            ViewGroup.LayoutParams params = v.getLayoutParams();
            params.width = (int) (params.width * size);
        }
        if(mIsReverseInflateRot0 || mIsReverseInflateRot90){
            setupVerticalButton(v);
        }

        parent.addView(v);
        addToDispatchers(v);

        View lastView = landscape ? mLastLandscape : mLastPortrait;
        if (lastView != null) {
            v.setAccessibilityTraversalAfter(lastView.getId());
        }
        if (landscape) {
            mLastLandscape = v;
        } else {
            mLastPortrait = v;
        }
        return v;
    }

4.添加设置按键事件可见:

|-- frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java

//导入接口
import android.widget.Toast;


//点击处理:
	private View.OnClickListener mPowerClickListener = new View.OnClickListener(){
		public void onClick(View v){
		
              Toast.makeText(mContext,"power power ",Toast.LENGTH_LONG).show();
		}
	};
	private void prepareNavigationBarView() {
        mNavigationBarView.reorient();

        ButtonDispatcher recentsButton = mNavigationBarView.getRecentsButton();
        recentsButton.setOnClickListener(mRecentsClickListener);
        recentsButton.setOnTouchListener(mRecentsPreloadOnTouchListener);
        recentsButton.setLongClickable(true);
        recentsButton.setOnLongClickListener(this::handleLongPressBackRecents);

        ButtonDispatcher backButton = mNavigationBarView.getBackButton();
        backButton.setLongClickable(true);
        backButton.setOnLongClickListener(this::handleLongPressBackRecents);

        ButtonDispatcher homeButton = mNavigationBarView.getHomeButton();
        homeButton.setOnTouchListener(mHomeActionListener);
        homeButton.setOnLongClickListener(mLongPressHomeListener);
 
        ButtonDispatcher screenshotButton=mNavigationBarView.getScreenshotButton();
        screenshotButton.setOnClickListener(mScreenshotClickListener);
        screenshotButton.setOnTouchListener(mScreenshotTouchListener);
        screenshotButton.setVisibility(View.VISIBLE);
        boolean isShow=Settings.System.getInt(mContext.getContentResolver(), Settings.System.SCREENSHOT_BUTTON_SHOW, 1)==1;
        if(isShow){
            screenshotButton.setVisibility(View.VISIBLE);
        }else{
            screenshotButton.setVisibility(View.GONE);
        }


//添加监听并使用按键可见.
	ButtonDispatcher powerButton=mNavigationBarView.getPowerButton();
        powerButton.setOnClickListener(mPowerClickListener);
        powerButton.setVisibility(View.VISIBLE);
		
	}

本文地址：https://blog.csdn.net/qq_32014215/article/details/107557201

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