android中的TabLayout类为您提供了一个TabItem,可以让您指定文本和图标。 是否可以将自定义视图用作TabItem?
我的标签看起来像这样
除了图标和文字标签之外,我还可以看到一个通知符号(黄色圆圈内的数字)。我该如何制作这样的标签?
答案 0 :(得分:36)
在某些情况下,我们可能希望为每个选项卡应用自定义XML布局,而不是默认选项卡视图。为实现此目的,在将滑动标签附加到寻呼机后迭代所有TabLayout.Tabs:
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Get the ViewPager and set it's PagerAdapter so that it can display items
ViewPager viewPager = (ViewPager) findViewById(R.id.viewpager);
SampleFragmentPagerAdapter pagerAdapter =
new SampleFragmentPagerAdapter(getSupportFragmentManager(), MainActivity.this);
viewPager.setAdapter(pagerAdapter);
// Give the TabLayout the ViewPager
TabLayout tabLayout = (TabLayout) findViewById(R.id.sliding_tabs);
tabLayout.setupWithViewPager(viewPager);
// Iterate over all tabs and set the custom view
for (int i = 0; i < tabLayout.getTabCount(); i++) {
TabLayout.Tab tab = tabLayout.getTabAt(i);
tab.setCustomView(pagerAdapter.getTabView(i));
}
}
//...
}
接下来,我们将getTabView(position)方法添加到SampleFragmentPagerAdapter类:
public class SampleFragmentPagerAdapter extends FragmentPagerAdapter {
private String tabTitles[] = new String[] { "Tab1", "Tab2" };
private int[] imageResId = { R.drawable.ic_one, R.drawable.ic_two };
public View getTabView(int position) {
// Given you have a custom layout in `res/layout/custom_tab.xml` with a TextView and ImageView
View v = LayoutInflater.from(context).inflate(R.layout.custom_tab, null);
TextView tv = (TextView) v.findViewById(R.id.textView);
tv.setText(tabTitles[position]);
ImageView img = (ImageView) v.findViewById(R.id.imgView);
img.setImageResource(imageResId[position]);
return v;
}
}
使用此功能,您可以为适配器中的每个页面设置任何自定义选项卡内容。
答案 1 :(得分:0)
尝试一下
private View mCustomView;
private ImageView mImageViewCustom;
private TextView mTextViewCustom;
private int count = 0;
public View getCustomTab() {
mCustomView = LayoutInflater.from(NewHomePageActivity.this).inflate(R.layout.custom_tab, null);
mImageViewCustom = (ImageView) mCustomView.findViewById(R.id.custom_tab_imageView);
mTextViewCustom = (TextView) mCustomView.findViewById(R.id.custom_tab_textView_count);
if (count > 0) {
mTextViewCustom.setVisibility(View.VISIBLE);
mTextViewCustom.setText(String.valueOf(count));
} else {
mTextViewCustom.setVisibility(View.GONE);
}
return mCustomView;
}
private void setupTabIcons() {
tabLayout.getTabAt(0).setIcon(R.mipmap.ic_home_gray_48);
tabLayout.getTabAt(1).setIcon(R.mipmap.ic_follow_gray_48);
tabLayout.getTabAt(2).setIcon(R.mipmap.ic_follower_gray_48);
tabLayout.getTabAt(3).setIcon(R.mipmap.ic_news_event_gray_48);
tabLayout.getTabAt(4).setCustomView(getCustomTab());
tabLayout.getTabAt(5).setIcon(R.mipmap.ic_menu_gray_48);
}
XML
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@color/colorPrimary">
<ImageView
android:id="@+id/custom_tab_imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@mipmap/ic_bell_gray_48"
android:contentDescription="@string/image_dsc" />
<TextView
android:id="@+id/custom_tab_textView_count"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:layout_marginEnd="5dp"
android:layout_marginRight="5dp"
android:layout_marginBottom="5dp"
android:background="@drawable/shape_circle"
android:padding="2dp"
android:text="1"
android:textColor="@color/colorWhite"
android:textSize="11sp" />
</FrameLayout>
答案 2 :(得分:0)
您可以为每个选项卡项目使用任何布局。首先像这样将TabItems添加到TabLayout; (我的布局有2个textview和每个选项卡1个图像)
<com.google.android.material.tabs.TabLayout
android:id="@+id/tabLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintTop_toTopOf="parent">
<com.google.android.material.tabs.TabItem
android:id="@+id/ti_payroll_tab_tab1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout="@layout/your_custom_layout" />
<com.google.android.material.tabs.TabItem
android:id="@+id/ti_payroll_tab_tab2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout="@layout/your_custom_layout" />
</com.google.android.material.tabs.TabLayout>
然后,您必须在自定义布局中找到并设置视图。
TabLayout.Tab tab1 = tabLayout.getTabAt(0);
tvTab1Title = tab1.getCustomView().findViewById(R.id.txt_payroll_tab_title);
tvTab1Value = tab1.getCustomView().findViewById(R.id.txt_payroll_tab_value);
ivTab1 = tab1.getCustomView().findViewById(R.id.img_payroll_tab_image);
答案 3 :(得分:0)
关于这个主题的文档很差。我们可以使用 setCustomView
选项卡的方法来设置自定义视图。以下是一个工作示例:
tab_layout.xml
<com.google.android.material.tabs.TabLayout
android:id="@+id/tabLayout"
android:layout_width="match_parent"
android:layout_height="@dimen/tab_height"
android:background="@color/primary_dark" />
custom_tab_item.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="@dimen/tab_height"
android:orientation="horizontal"
android:padding="@dimen/tab_padding">
<ImageView
android:id="@+id/tabIcon"
android:layout_width="@dimen/tab_icon"
android:layout_height="@dimen/tab_icon"
android:layout_centerVertical="true"/>
<TextView
android:id="@+id/tabTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toEndOf="@+id/tabIcon"
android:textColor="@color/white" />
<TextView
android:id="@+id/tabSubTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/tabTitle"
android:layout_toEndOf="@+id/tabIcon"
android:textColor="@color/white" />
</RelativeLayout>
MainActivity.kt
TabLayoutMediator(binding.tabLayout, binding.viewPager) { tab, position ->
when (position) {
0 -> {
tab.setCustomView(R.layout.tab_item)
tab.customView?.findViewById<ImageView>(R.id.tabIcon)
?.setImageResource(R.drawable.tab1)
tab.customView?.findViewById<TextView>(R.id.tabTitle)?.setText(R.string.tab1)
}
1 -> {
tab.setCustomView(R.layout.tab_item)
tab.customView?.findViewById<ImageView>(R.id.tabIcon)
?.setImageResource(R.drawable.tab2)
tab.customView?.findViewById<TextView>(R.id.tabTitle)
?.setText(R.string.tab2)
}
}
}.attach()