tablayout 不在 android 中显示点

Question

我想显示带有 TabLayout 点的 viewPager 页面。但 tablayout 没有显示任何内容。

我的java代码：

public class MainActivity extends AppCompatActivity  {
private ViewPager viewPager;
private ViewPagerAdapter adapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

         //adapter + view pager
    adapter = new ViewPagerAdapter(getSupportFragmentManager());

    viewPager = (ViewPager) findViewById(R.id.container);
    viewPager.setAdapter(adapter);
    viewPager.setOnPageChangeListener(this);

    TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_dots);
    tabLayout.setupWithViewPager(viewPager,true);
}

我的xml代码：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/lib/com.app.chasebank"    android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/main_color"
tools:context="zekrshomargouya.maxsoft.com.zekrshomargouya.MainActivity">

<android.support.v7.widget.Toolbar
    android:id="@+id/toolbar"
    android:layout_height="wrap_content"
    android:layout_width="match_parent"
    android:fitsSystemWindows="true"
    android:minHeight="?attr/actionBarSize"
    app:navigationIcon="?attr/homeAsUpIndicator"
    style="@style/toolbar">
</android.support.v7.widget.Toolbar>


<android.support.v4.view.ViewPager
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    android:layout_marginBottom="50dp"
    android:layout_marginLeft="25dp" android:layout_marginRight="25dp"
    android:layout_marginTop="30dp"
    android:layout_gravity="top"
    android:layout_below="@id/toolbar"/>

<android.support.design.widget.TabLayout
    android:id="@+id/tab_dots"
    android:layout_width="match_parent"
    android:layout_height="40dp"
    app:tabBackground="@drawable/tab_selector"
    app:tabGravity="center"
    app:tabIndicatorHeight="2dp"
    android:background="#ff55ff"
    android:layout_marginTop="0dp"
    android:layout_gravity="center"
    android:layout_alignParentBottom="true"/>

我的点数代码：

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

<item android:drawable="@drawable/tab_indicator_seleced"
    android:state_selected="true"/>

<item android:drawable="@drawable/tab_indicator_default"/>

和

<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
    <shape
        android:innerRadius="0dp"
        android:shape="ring"
        android:thickness="10dp"
        android:useLevel="false">
        <solid android:color="@color/colorAccent"/>
    </shape>
</item>

我的build.gradle代码：

dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:25.0.1'
compile 'com.android.support:support-v4:25.0.1'
testCompile 'junit:junit:4.12'
compile 'com.android.support:design:25.0.1'
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
    exclude group: 'com.android.support', module: 'support-annotations'
})

正如你在这张图片中看到的，TabLayout 只是一条线（但我用的是点）

Answer 1

在这种情况下，您应该键入组件的属性，而不是 Copy/Paste。所以 app 替换为 app1。就是这个！

 <android.support.design.widget.TabLayout
    android:id="@+id/tab_dots"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    app:tabIndicatorHeight="0dp"
    app1:tabBackground="@drawable/tab_selector"
    app1:tabGravity="center"/>

tablayout 不在 android 中显示点

tablayout doesn't show dots in android

android

android-viewpager

android-tablayout