状态栏颜色未更改，相对布局作为根元素 [英] Status Bar Color not changing with Relative Layout as root element

问题描述

我刚刚开始学习android，正在学习添加AppBar.但是，如果我使用相对布局"作为根，则状态栏"不要使用主题中定义的颜色"colorPrimaryDark".但是，将布局更改为 CoordinatorLayout 可以使其正常工作.

I am just starting to learn android, I am learning to add AppBar. But if I use Relative Layout as the root then Status Bar don't use the color "colorPrimaryDark" defined in the theme. But changing the layout to CoordinatorLayout make it works.

有人可以解释其中的区别吗?是否需要使用CoordinatorLayout布局?

Can someone explain the difference? is it a requirement to use the CoordinatorLayout Layout?

活动扩展了AppCompatActivity.

Activity Extends AppCompatActivity.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:context="com.example.ankit.designdemo.MainActivity">


    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="@color/colorPrimary"
        app:theme="@style/ThemeOverlay.AppCompat.Dark">

    </android.support.v7.widget.Toolbar>
</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:context="com.example.ankit.designdemo.MainActivity">


    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="?attr/actionBarSize"
        android:background="@color/colorPrimary"
        app:theme="@style/ThemeOverlay.AppCompat.Dark">

    </android.support.v7.widget.Toolbar>
</android.support.design.widget.CoordinatorLayout>

<!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>

    <style name="AppTheme.NoActionBar">
        <item name="windowActionBar">false</item>
        <item name="windowNoTitle">true</item>
    </style>

    <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />

    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />


public class MainActivity extends AppCompatActivity {

    private DrawerLayout mDrawerLayout;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.custom_activity);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        ActionBar actionBar = getSupportActionBar();
        actionBar.setHomeAsUpIndicator(R.drawable.ic_menu);
        actionBar.setDisplayHomeAsUpEnabled(true);


    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }


}

推荐答案

在v21/styles.xml中，您可能具有以下代码行:

In v21/styles.xml you probably have this line of code:

  <item name="android:statusBarColor">@android:color/transparent</item>

在API 23上运行时，声明的样式将从v21/styles.xml中的样式中覆盖.

And as you are running on API 23, the declared styles are overrided from the ones in v21/styles.xml.

作为解决方案:

只需删除该行，它将正常工作

这篇关于状态栏颜色未更改，相对布局作为根元素的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！