tablayout 的使用

<?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout 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"> <com.google.android.material.tabs.TabLayout android:layout_width="0dp" android:layout_height="wrap_content" android:id="@+id/tabLayout" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintStart_toStartOf="parent" android:layout_marginLeft="1dp" android:layout_marginStart="1dp" android:layout_marginEnd="1dp" android:layout_marginRight="1dp" app:layout_constraintHorizontal_bias="1.0" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintVertical_bias="0.991"> <com.google.android.material.tabs.TabItem android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="首页"/> <com.google.android.material.tabs.TabItem android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="分类"/> <com.google.android.material.tabs.TabItem android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="关于我"/> </com.google.android.material.tabs.TabLayout> </androidx.constraintlayout.widget.ConstraintLayout>

使用 include 引入

<?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout 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"> <Button android:text="back" android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/app_content_back" app:layout_constraintTop_toTopOf="parent" app:layout_constraintStart_toStartOf="parent" android:layout_marginLeft="132dp" app:layout_constraintBottom_toBottomOf="parent" android:layout_marginStart="132dp"/> <include layout="@layout/tab_bar" /> </androidx.constraintlayout.widget.ConstraintLayout>

绑定事件，就可以监听 导航条点击了

/** * 自定义回调 */ @Override protected void onCreateCustom() { btnBack.setOnClickListener(this); tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() { @Override public void onTabSelected(TabLayout.Tab tab) { System.out.println("ss"); System.out.println(tab.toString()); } @Override public void onTabUnselected(TabLayout.Tab tab) { } @Override public void onTabReselected(TabLayout.Tab tab) { } }); // TabLayout tabLayout = findViewById(R.id.tabLayout); }