[置顶] Android系统移植与调试之------->如何修改Android设备状态条上音量加减键在横竖屏的时候的切换与显示

2023-07-28 14:35:40

这两天由于一个客户的要求，将MID竖屏时候的状态条上的音量键去掉。所以尝试修改了一下，成功了，分享一下经验。

先看一下修改后的效果图，如下所示。

横屏的时候：有音量加减键

竖屏的时候：音量加减键被去掉了

然后来说一说我的解决思路。

首先我查看了\mx0831-0525\frameworks\base\packages\SystemUI\res\layout\system_bar.xml文件

<?xml version="1.0" encoding="utf-8"?>

<!--

 * Copyright (C) 2010 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.

-->

<!-- TabletStatusBarView extends FrameLayout -->

<com.android.systemui.statusbar.tablet.TabletStatusBarView

    xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:systemui="http://schemas.android.com/apk/res/com.android.systemui"

    android:background="@drawable/system_bar_background"

    >

    <FrameLayout

        android:id="@+id/bar_contents_holder"

        android:layout_width="match_parent"

        android:layout_height="@*android:dimen/system_bar_height"

        android:layout_gravity="bottom"

        >

        <RelativeLayout

            android:id="@+id/bar_contents"

            android:layout_width="match_parent"

            android:layout_height="match_parent"

            android:clipChildren="false"

            >

            <!-- notification icons & panel access -->

            <include layout="@layout/system_bar_notification_area"

                android:layout_width="wrap_content"

                android:layout_height="match_parent"

                android:layout_alignParentRight="true"

                android:layout_marginTop="1dp"

                />

            <!-- navigation controls -->

            <LinearLayout

                android:id="@+id/navigationArea"

                android:layout_width="wrap_content"

                android:layout_height="match_parent"

                android:layout_alignParentLeft="true"

                android:orientation="horizontal"

                android:clipChildren="false"

                android:clipToPadding="false"

                >

                <com.android.systemui.statusbar.policy.KeyButtonView android:id="@+id/back"

                    android:layout_width="@dimen/navigation_key_width"

                    android:layout_height="match_parent"

                    android:src="@drawable/ic_sysbar_back"

                    systemui:keyCode="4"

                    android:contentDescription="@string/accessibility_back"

                    systemui:glowBackground="@drawable/ic_sysbar_highlight"

                    />

                <com.android.systemui.statusbar.policy.KeyButtonView android:id="@+id/home"

                    android:layout_width="@dimen/navigation_key_width"

                    android:layout_height="match_parent"

                    android:src="@drawable/ic_sysbar_home"

                    systemui:keyCode="3"

                    android:contentDescription="@string/accessibility_home"

                    systemui:glowBackground="@drawable/ic_sysbar_highlight"

                    />

                <com.android.systemui.statusbar.policy.KeyButtonView android:id="@+id/recent_apps"

                    android:layout_width="@dimen/navigation_key_width"

                    android:layout_height="match_parent"

                    android:src="@drawable/ic_sysbar_recent"

                    android:contentDescription="@string/accessibility_recent"

                    systemui:glowBackground="@drawable/ic_sysbar_highlight"

                    />

				<com.android.systemui.statusbar.policy.KeyButtonView android:id="@+id/sub"

                     android:background="@drawable/sub_normal"

                     android:layout_width="70dip"

                     android:layout_height="match_parent"

                     android:visibility="invisible"

		     systemui:glowBackground="@drawable/ic_sysbar_highlight"

                     systemui:keyCode="25"

                     />

				<com.android.systemui.statusbar.policy.KeyButtonView android:id="@+id/add"

                     android:background="@drawable/add_normal"

                     android:layout_width="70dip"

		     android:layout_height="match_parent"

                     android:visibility="invisible"

                     systemui:glowBackground="@drawable/ic_sysbar_highlight"

                     systemui:keyCode="24"

                     />    	

 <com.android.systemui.statusbar.policy.KeyButtonView android:id="@+id/screenshot"

                    android:layout_width="@dimen/navigation_key_width"

                    android:layout_height="match_parent"

                    android:src="@drawable/ic_sysbar_screenshot"

                    android:contentDescription="@string/accessibility_screenshot"

                    systemui:glowBackground="@drawable/ic_sysbar_highlight"

                    />			

                <com.android.systemui.statusbar.policy.KeyButtonView android:id="@+id/menu"

                    android:layout_width="@dimen/navigation_menu_key_width"

                    android:layout_height="match_parent"

                    android:src="@drawable/ic_sysbar_menu"

                    systemui:keyCode="82"

                    android:visibility="invisible"

                    android:contentDescription="@string/accessibility_menu"

                    systemui:glowBackground="@drawable/ic_sysbar_highlight"

                    />

            </LinearLayout>

            <!-- fake space bar zone -->

            <com.android.systemui.statusbar.policy.EventHole android:id="@+id/fake_space_bar"

                android:layout_height="match_parent"

                android:layout_width="0dp"

                android:paddingLeft="8dip"

                android:paddingRight="8dip"

                android:layout_toRightOf="@+id/navigationArea"

                android:layout_toLeftOf="@+id/notificationArea"

                android:visibility="gone"

                />

        </RelativeLayout>

    </FrameLayout>

    <FrameLayout

        android:id="@+id/bar_shadow_holder"

        android:layout_width="match_parent"

        android:layout_height="@*android:dimen/system_bar_height"

        android:layout_gravity="bottom"

        >

        <!-- lights out shade -->

        <RelativeLayout

            android:id="@+id/bar_shadow"

            android:layout_width="match_parent"

            android:layout_height="match_parent"

            android:background="#FF000000"

            android:visibility="gone"

            >

            <ImageView

                android:id="@+id/dot0"

                android:layout_width="80dip"

                android:layout_height="48dip"

                android:src="@drawable/ic_sysbar_lights_out_dot_small"

                android:layout_alignParentLeft="true"

                android:layout_alignParentBottom="true"

                />

            <ImageView

                android:id="@+id/dot1"

                android:layout_width="80dip"

                android:layout_height="48dip"

                android:src="@drawable/ic_sysbar_lights_out_dot_large"

                android:layout_toRightOf="@+id/dot0"

                android:layout_alignParentBottom="true"

                />

            <ImageView

                android:id="@+id/dot2"

                android:layout_width="80dip"

                android:layout_height="48dip"

                android:src="@drawable/ic_sysbar_lights_out_dot_small"

                android:layout_toRightOf="@+id/dot1"

                android:layout_alignParentBottom="true"

                />

            <ImageView

                android:id="@+id/dot3"

                android:layout_width="80dip"

                android:layout_height="48dip"

                android:src="@drawable/ic_sysbar_lights_out_dot_small"

                android:layout_alignParentRight="true"

                android:layout_alignParentBottom="true"

                />

        </RelativeLayout>

    </FrameLayout>

</com.android.systemui.statusbar.tablet.TabletStatusBarView>

在该文件中设置了add按钮（即音量加按钮）和sub按钮（即音量减按钮）的属性，android:visibility="invisible"设置为不可见

但是这样不能达到切换横竖屏的时候的消失和显示的效果。

然后我查看了mx0831-0525\frameworks\base\packages\SystemUI\src\com\android\systemui\statusbar\tablet\TabletStatusBar.java文件

然后修改了该文件的 onConfigurationChanged(Configuration newConfig)方法，修改如下

 @Override

    protected void onConfigurationChanged(Configuration newConfig) {

        loadDimens();

	//edited by ouyangpeng start

	if(newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE){

			mVolumeUpButton.setVisibility(View.VISIBLE);

			mVolumeDownButton.setVisibility(View.VISIBLE);

		}else if(newConfig.orientation == Configuration.ORIENTATION_PORTRAIT){

			mVolumeUpButton.setVisibility(View.GONE);

			mVolumeDownButton.setVisibility(View.GONE);

	}

        //edited by ouyangpeng 	end

        mNotificationPanelParams.height = getNotificationPanelHeight();

        WindowManagerImpl.getDefault().updateViewLayout(mNotificationPanel,

                mNotificationPanelParams);

        mRecentsPanel.updateValuesFromResources();

        mShowSearchHoldoff = mContext.getResources().getInteger(

                R.integer.config_show_search_delay);

        updateSearchPanel();

    }

这样就可以根据android横竖屏来动态设置音量键的消失和显示了。

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作者：欧阳鹏欢迎转载，与人分享是进步的源泉！

转载请保留原文地址：http://blog.csdn.net/ouyang_peng/

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