Android 7.0导航栏上添加图标

Android  7.0的代码和6.0有很大变化,在导航栏上添加图标修改的文件更多些,

我先列出需要修改的文件:

1,frameworks/base/packages/SystemUI/res/layout/mark.xml 

2,frameworks/base/packages/SystemUI/res/drawable-sw600dp/custom_mark.png

3,frameworks/base/packages/SystemUI/res/values-sw600dp/config.xml

4,frameworks/base/SystemUI/res/values-sw600dp/config.xml

5,frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarInflaterView.java

6,frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java

下面一个一个把修改的文件代码列出,首先是mark.xml文件,Andoid 7.0的recent,back,home定义按键都是定义xml文件.我也是按照这三个按键的定义标准来.

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2016 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.
-->

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:systemui="http://schemas.android.com/apk/res-auto"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_weight="1"
    >
    <com.android.systemui.statusbar.policy.KeyButtonView
        android:id="@+id/markTest"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_marginEnd="2dp"
        android:src="@drawable/custom_mark"
        android:scaleType="centerInside"
        systemui:keyCode="82"
        android:contentDescription="@string/accessibility_menu"
        />
	
</FrameLayout>

2,custom_mark.png就是mark.xml所引用的图片,这个没什么说的,随便找一张图片就行

3,frameworks/base/packages/SystemUI/res/values-sw600dp/config.xml文件

<string name="config_navBarLayout" translatable="false">mark;back,home,recent,allapps;space</string>    //在这里添加mark

4,frameworks/base/packages/SystemUI/res/values/config.xml文件

<string name="config_navBarLayout" translatable="false">mark;back,home,recent,allapps;space</string>   //同样添加mark 

5,frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarInflaterView.java文件

  @Nullable
    protected View inflateButton(String buttonSpec, ViewGroup parent, boolean landscape,
            int indexInParent) {
        LayoutInflater inflater = landscape ? mLandscapeInflater : mLayoutInflater;
        float size = extractSize(buttonSpec);
        String button = extractButton(buttonSpec);
        View v = null;
        if("mark".equals(button)){    //判断当前的keyguarButton,如果是mark的话,inflate它
	        v = parent.findViewById(R.id.markTest);
	        if (null == v) {
                isAddToParent = true;
		    v = inflater.inflate(R.layout.mark, parent, false);
            }
	        changeViewPaddingAndWidth(v,landscape,mIsBookuiMode);
    }

6,frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/NavigationBarView.java文件

    public ButtonDispatcher getMarkButton() {    //定义获取mark的方法
        return mButtonDisatchers.get(R.id.markTest);
    }

    public void setDisabledFlags(int disabledFlags, boolean force) {
        if (!force && mDisabledFlags == disabledFlags) return;

        mDisabledFlags = disabledFlags;

        ......
        
        getMarkButton().setVisibility(View.VISIBLE);    //在这里设置图标可见
        ......
    }

然后可以单独编译一下SystemUI,就可以看到自己的图标出现到导航栏上了~