我开始制作前台服务，根据文档，我需要将任何前台服务与通知相关联，让用户跟踪我的服务是否正常工作。
我的问题是我选择了一个图标，将它创建为图像 Assets 并选择白色作为它的颜色，但是无论我在它的 xml 中更改什么值，它看起来都是黑色的(我实际上已经将每个颜色值都更改为白色并且仍然它是黑色的)。
我想知道问题的原因是应用程序主题(有一些主题属性我必须覆盖)还是图像 xml 中缺少属性，我知道对于 Lollipop 和最重要的是所有图标都必须是白色的但是 pre 呢？ - Lollipop ？如果状态栏颜色为白色，那么如何将图标颜色更改为黑色呢？
我在 api 18 上使用 Theme.MaterialComponents
我的图片 Assets xml
<vector xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:width="24dp"
android:height="24dp"
android:viewportWidth="24"
android:viewportHeight="24"
android:tint="@color/white"
app:tint="@color/white"
android:alpha="0.8">
<group android:scaleX="1.2"
android:scaleY="1.2"
android:translateX="-2.4"
android:translateY="-2.4">
<path
android:fillColor="@android:color/white"
android:pathData="M11.99,2C6.47,2 2,6.48 2,12s4.47,10 9.99,10C17.52,22 22,17.52 22,12S17.52,2 11.99,2zM12,20c-4.42,0 -8,-3.58 -8,-8s3.58,-8 8,-8 8,3.58 8,8 -3.58,8 -8,8z"/>
<path
android:fillColor="@android:color/white"
android:pathData="M12.5,7H11v6l5.25,3.15 0.75,-1.23 -4.5,-2.67z"/>
</group>
</vector>
我的通知代码在服务中
NotificationCompat.Builder builder = new NotificationCompat.Builder(this, CHANNEL_ID)
.setSmallIcon(R.drawable.ic_clock)
.setContentTitle(getText(R.string.starting_notification_title))
.setContentText(getText(R.string.starting_notification_desc))
.setPriority(priority);
Notification notification = builder.build();
startForeground(startId,notification);
更新
(正常)themes.xml
<resources xmlns:tools="http://schemas.android.com/tools">
<!-- Base application theme. -->
<style name="Theme.FacebookTest" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
<!-- Primary brand color. -->
<item name="colorPrimary">@color/purple_500</item>
<item name="colorPrimaryVariant">@color/purple_700</item>
<item name="colorOnPrimary">@color/white</item>
<!-- Secondary brand color. -->
<item name="colorSecondary">@color/teal_200</item>
<item name="colorSecondaryVariant">@color/teal_700</item>
<item name="colorOnSecondary">@color/black</item>
<!-- Status bar color. -->
<item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
<!-- Customize your theme here. -->
</style>
<style name="number_picker_custom_style" parent="@android:style/Theme" />
<style name="Theme.FacebookTest.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>
<style name="Theme.FacebookTest.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
<style name="Theme.FacebookTest.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
<style name="ShapeAppearanceOverlay.App.CornerSize50Percent" parent="">
<item name="cornerFamily">rounded</item>
<item name="cornerSize">50%</item>
</style>
</resources>
(夜晚)theme.xml
<resources xmlns:tools="http://schemas.android.com/tools">
<!-- Base application theme. -->
<style name="Theme.FacebookTest" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
<!-- Primary brand color. -->
<item name="colorPrimary">@color/purple_200</item>
<item name="colorPrimaryVariant">@color/purple_700</item>
<item name="colorOnPrimary">@color/black</item>
<!-- Secondary brand color. -->
<item name="colorSecondary">@color/teal_200</item>
<item name="colorSecondaryVariant">@color/teal_200</item>
<item name="colorOnSecondary">@color/black</item>
<!-- Status bar color. -->
<item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
<!-- Customize your theme here. -->
</style>
<style name="Theme.FacebookTest.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>
<style name="Theme.FacebookTest.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
<style name="Theme.FacebookTest.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
</resources>
应用 list
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.pretest">
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.FOREGROUND_SERVICE"/>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<!--android:maxSdkVersion="28"
android:hardwareAccelerated="false"
android:largeHeap="true"-->
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/Theme.MaterialComponents">
<meta-data android:name="com.facebook.sdk.ApplicationId" android:value="@string/facebook_app_id"/>
<meta-data android:name="com.facebook.sdk.ClientToken" android:value="@string/facebook_client_token"/>
<activity android:name="com.facebook.FacebookActivity"
android:configChanges=
"keyboard|keyboardHidden|screenLayout|screenSize|orientation"
android:label="@string/app_name" />
<activity
android:name="com.facebook.CustomTabActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data android:scheme="@string/fb_login_protocol_scheme" />
</intent-filter>
</activity>
<activity
android:name="com.example.pretest.MainActivity"
android:label="@string/app_name"
android:theme="@style/Theme.FacebookTest.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".services.BootBroadcastReceiver" android:exported="true">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED"/>
</intent-filter>
</receiver>
<service android:name=".services.AlarmSettingService" android:exported="false"/>
<receiver
android:name=".services.AlarmReceiver"
android:enabled="true"
android:exported="true" />
</application>
</manifest>
更新
我的可绘制文件(我正在使用 ic_clock，它旁边似乎没有任何版本代码)
最佳答案
所以我检查了您的代码并发现问题出在您使用的颜色资源上。如果您将鼠标悬停在 @android:color/white
您会看到一条消息显示:
Resource references will not work correctly in images generated for this vector icon for API < 21; check generated icon to make sure it looks acceptable
因此，您需要将此类颜色资源更改为直接颜色代码。例如 android:fillColor="#FFFFFF"
您最终的可绘制对象看起来像这样:
<vector xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:width="24dp"
android:height="24dp"
android:alpha="0.8"
android:viewportWidth="24"
android:viewportHeight="24">
<group
android:scaleX="1.2"
android:scaleY="1.2"
android:translateX="-2.4"
android:translateY="-2.4">
<path
android:fillColor="#FFFFFF"
android:pathData="M11.99,2C6.47,2 2,6.48 2,12s4.47,10 9.99,10C17.52,22 22,17.52 22,12S17.52,2 11.99,2zM12,20c-4.42,0 -8,-3.58 -8,-8s3.58,-8 8,-8 8,3.58 8,8 -3.58,8 -8,8z" />
<path
android:fillColor="#FFFFFF"
android:pathData="M12.5,7H11v6l5.25,3.15 0.75,-1.23 -4.5,-2.67z" />
</group>
</vector>
关于java - 无论我做什么，状态栏通知图标都保持黑色，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/69120017/