Android中TabLayout添加小红点

ゝ一纸荒年。 2023-06-08 10:58 123阅读 0赞

\# Android中TabLayout添加小红点

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## 1.主布局文件 ##

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        tools:context="com.bxkj.dylan.tablayoutreddot.MainActivity">
        <android.support.design.widget.TabLayout
            android:id="@+id/tabLayout"
            app:tabBackground="@android:color/white"
            app:tabTextColor="@color/colorBlack"
            app:tabSelectedTextColor="@color/colorAccent"
            app:tabMode="scrollable"
            android:layout_width="match_parent"
            android:layout_height="40dp" />
    </LinearLayout>

## 2.要显示小红点的自定义布局文件 ##

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="wrap_content"
        android:layout_height="40dp"
        android:layout_gravity="center"
        android:orientation="horizontal">
        <TextView
            android:id="@+id/tv_tab_title"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:gravity="center"
            android:textColor="@color/colorBlack"
            android:textSize="15sp" />
    
        <TextView
            android:id="@+id/iv_tab_red"
            android:layout_gravity="right"
            android:layout_width="18dp"
            android:text="5"
            android:gravity="center"
            android:textColor="@android:color/white"
            android:layout_height="18dp"
            android:background="@drawable/red_dot" />
    </LinearLayout>

## 3.设置TabLayout加载的各个Tab ##

import android.content.res.Resources;
    import android.support.design.widget.TabLayout;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.TextView;
    
    /**
     * @author dylan
     */
    public class MainActivity extends AppCompatActivity {
        private TabLayout tabLayout;
        private TextView tv_tab_title;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            tabLayout = findViewById(R.id.tabLayout);
            initData();
        }
    
        private void initData() {
            TabLayout.Tab tab = tabLayout.newTab().setText("全部");
            tabLayout.addTab(tab);
    
            //待付款栏目-加载自定义显示小红点的布局
            tab = tabLayout.newTab();
            tab.setCustomView(R.layout.tab_wait_for_pay);
            tv_tab_title = tab.getCustomView().findViewById(R.id.tv_tab_title);
            tv_tab_title.setText("待付款");
            tabLayout.addTab(tab);
    
    
            tab = tabLayout.newTab().setText("待发货");
            tabLayout.addTab(tab);
    
            tab = tabLayout.newTab().setText("待收货");
            tabLayout.addTab(tab);
    
            tab = tabLayout.newTab().setText("已完成");
            tabLayout.addTab(tab);
    
            tab = tabLayout.newTab().setText("已取消");
            tabLayout.addTab(tab);
    
            //添加tabLayout选中监听
            tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
                @Override
                public void onTabSelected(TabLayout.Tab tab) {
                    //设置选中时的文字颜色
                    if (tab.getCustomView() != null) {
                        tv_tab_title.setTextColor(getResources().getColor(R.color.colorAccent));
                    }
                }
    
                @Override
                public void onTabUnselected(TabLayout.Tab tab) {
                    //设置未选中时的文字颜色
                    if (tab.getCustomView() != null) {
                        tv_tab_title.setTextColor(getResources().getColor(R.color.colorBlack));
                    }
                }
    
                @Override
                public void onTabReselected(TabLayout.Tab tab) {
    
                }
            });
        }
    }

[format_png]: /images/20230531/c55ab87997af46afaecc5df47869a8ce.png