java - 工具栏 addView 不起作用

Question

我需要用自己的自定义工具栏替换普通的工具栏。我使用以下代码，但没有显示任何内容:

我的MainActivity:

    public class MainActivity extends AppCompatActivity {

    private Toolbar mToolbar;
    private View mView;
    private TabLayout mTabLayout;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        mToolbar = (Toolbar) findViewById(R.id.toolbar);

        setSupportActionBar(mToolbar);

        mView = 
       LayoutInflater.from(this).inflate(R.layout.item_toolbar_main, null);
        mToolbar.addView(mView);

        ViewPager viewPager = (ViewPager) findViewById(R.id.viewpager);

        setupViewPager(viewPager);

        mTabLayout = (TabLayout) findViewById(R.id.tabs);
        mTabLayout.setupWithViewPager(viewPager);

        View view1 = View.inflate(this, R.layout.item_tablayout_item, 
    null);



 view1.findViewById(R.id.icon).setBackgroundResource(R.drawable.ic_solved);

        View view2 = View.inflate(this, R.layout.item_tablayout_item, 
  null);



 view2.findViewById(R.id.icon).setBackgroundResource(R.drawable.ic_unsolved)
   ;

        try {
            mTabLayout.getTabAt(0).setCustomView(mView);
            mTabLayout.getTabAt(1).setCustomView(mView);
        } catch (Exception ex) {
            //Add crashlitics;
        }

    } }

我的 MainActivity 的 XML:

<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"
    tools:context="com.divofmod.quizerfield.Activities.MainActivity">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/colorWhite"
            android:paddingBottom="@dimen/activity_margin_quarter"
            android:paddingLeft="@dimen/activity_margin_half"
            android:paddingRight="@dimen/activity_margin_half"
            app:contentInsetEnd="@dimen/activity_margin_zero"
            app:contentInsetLeft="@dimen/activity_margin_zero"
            app:contentInsetRight="@dimen/activity_margin_zero"
            app:contentInsetStart="@dimen/activity_margin_zero"
            app:layout_scrollFlags="scroll|enterAlways"/>

        <android.support.design.widget.TabLayout
            android:id="@+id/tabs"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            app:tabGravity="fill"
            app:tabMode="fixed"/>
    </android.support.design.widget.AppBarLayout>

    <android.support.v4.view.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"/>
</android.support.design.widget.CoordinatorLayout>

我的工具栏项目的XML:

<RelativeLayout 
             xmlns:android="http://schemas.android.com/apk/res/android"
                xmlns:tools="http://schemas.android.com/tools"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:descendantFocusability="beforeDescendants"
                android:focusableInTouchMode="true"
                >

    <ImageView
        android:id="@+id/logoQuizer"
        android:layout_width="match_parent"
        android:layout_height="@dimen/image_medium"
        android:layout_marginBottom="@dimen/activity_margin_half"
        android:layout_marginTop="@dimen/activity_margin_half"
        android:foregroundGravity="center_vertical"
        android:src="@drawable/logo_quizer"/>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/logoQuizer"
        android:orientation="horizontal">

        <ImageView
            android:id="@+id/send"
            android:layout_width="@dimen/icon_small"
            android:layout_height="@dimen/icon_small"
            android:layout_alignParentLeft="true"
            android:layout_centerHorizontal="true"
            android:layout_marginLeft="@dimen/activity_margin_half"
            android:src="@drawable/ic_send"/>

        <ImageView
            android:id="@+id/sort"
            android:layout_width="@dimen/icon_small"
            android:layout_height="@dimen/icon_small"
            android:layout_centerHorizontal="true"
            android:layout_marginLeft="@dimen/activity_margin_quarter"
            android:layout_marginRight="@dimen/activity_margin_half"
            android:layout_toLeftOf="@+id/refresh"
            android:src="@drawable/ic_sort"/>

        <ImageView
            android:id="@+id/refresh"
            android:layout_width="@dimen/icon_small"
            android:layout_height="@dimen/icon_small"
            android:layout_alignParentRight="true"
            android:layout_centerHorizontal="true"
            android:layout_marginLeft="@dimen/activity_margin_quarter"
            android:layout_marginRight="@dimen/activity_margin_half"
            android:src="@drawable/ic_refresh"/>
    </RelativeLayout>
</RelativeLayout>

我的应用程序主题:

style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <!-- Customize your theme here. -->
        <item name="windowActionBar">false</item>
        <item name="windowNoTitle">true</item>
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>

Answer 1

最简单的方法是采用整个布局 item_toolbar_main并将其设置为 Toolbar直接在 xml 中而不使用任何 Java代码。所以改变 Toolbar在布局中查看 activity_main.xml像这样的事情:

<android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/colorWhite"
        android:paddingBottom="@dimen/activity_margin_quarter"
        android:paddingLeft="@dimen/activity_margin_half"
        android:paddingRight="@dimen/activity_margin_half"
        app:contentInsetEnd="@dimen/activity_margin_zero"
        app:contentInsetLeft="@dimen/activity_margin_zero"
        app:contentInsetRight="@dimen/activity_margin_zero"
        app:contentInsetStart="@dimen/activity_margin_zero"
        app:layout_scrollFlags="scroll|enterAlways">

             <include layout="@layout/item_toolbar_main"/>

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

这会起作用。我用过<include>但您也可以复制并粘贴整个 View从布局item_toolbar_main到 android.support.v7.widget.Toolbar 的内部而不是<include layout="@layout/item_toolbar_main"> .