android – 选中时在TabLayout中的Tab上更改图像
作者:互联网
我正在使用Design TabLayout,
<android.support.design.widget.TabLayout
android:id="@+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabBackground="@color/ColorPrimary"
app:tabIndicatorColor="@color/orange"
app:tabIndicatorHeight="3dp"
/>
我已经在Tabs中添加了customview
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@null">
<ImageView
android:id="@+id/imgTab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/tab_image"
android:layout_centerHorizontal="true"
android:focusable="true"
android:focusableInTouchMode="true"/>
<TextView
android:id="@+id/tabTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/imgTab"
android:text="Home"
android:background="@null"
android:layout_centerHorizontal="true"
android:textColor="@color/selector_tab_text"/>
</RelativeLayout>
tab.setCustomView(view);
我想在选择Tab时在自定义视图中更改图像.
在imageview上使用Selector尝试它不起作用.
我无法在运行时将视图分配给Tab,它只包含setCustomView方法.
怎么实现呢?
解决方法:
将setOnTabSelectedListener添加到tabLayout对象
i named mine
navigation
navigation.setOnTabSelectedListener(
new TabLayout.ViewPagerOnTabSelectedListener(mainView) {
@Override
public void onTabSelected(TabLayout.Tab tab) {
super.onTabSelected(tab);
// 1. get the custom View you've added
View tabView = tab.getCustomView();
// get inflated children Views the icon and the label by their id
TextView tab_label = (TextView) tabView.findViewById(R.id.nav_label);
ImageView tab_icon = (ImageView) tabView.findViewById(R.id.nav_icon);
// change the label color, by getting the color resource value
tab_label.setTextColor(getResources().getColor(R.color.active_color));
// change the image Resource
// i defined all icons in an array ordered in order of tabs appearances
// call tab.getPosition() to get active tab index.
tab_icon.setImageResource(navIconsActive[tab.getPosition()]);
}
// do as the above the opposite way to reset tab when state is changed
// as it not the active one any more
@Override
public void onTabUnselected(TabLayout.Tab tab) {
super.onTabUnselected(tab);
View tabView = tab.getCustomView();
TextView tab_label = (TextView) tabView.findViewById(R.id.nav_label);
ImageView tab_icon = (ImageView) tabView.findViewById(R.id.nav_icon);
// back to the black color
tab_label.setTextColor(getResources().getColor(R.color.dark_grey));
// and the icon resouce to the old black image
// also via array that holds the icon resources in order
// and get the one of this tab's position
tab_icon.setImageResource(navIcons[tab.getPosition()]);
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
super.onTabReselected(tab);
}
}
);
标签:android,android-tabs,android-tablelayout 来源: https://codeday.me/bug/20190516/1116904.html