Android

Question

我有一个在我的应用程序中实现的底部导航视图。它有 3 个图标：

地图Activity，片段A，片段B像这样：

这是我的地图Activity的样子

所以我设法显示了片段 A 和 B。但似乎我在 xml 的某处弄乱了片段（我是新手，所以我仍在努力思考在 xmls 的布局周围），如果我在搜索栏来自地图 Activity 的屏幕顶部单击，则搜索栏将显示为我的片段 "transparent" ，但您实际上看不到片段上的搜索栏。

我的意思是：我如何让我的片段 A 和 B 完全覆盖下面的 activity，这样它们就不会 "transparent"

activity_maps.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                xmlns:app="http://schemas.android.com/apk/res-auto"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="vertical"
                android:id="@+id/fragmentContainer">

    <fragment
            android:id="@+id/place_autocomplete_fragment"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:name="com.google.android.gms.location.places.ui.PlaceAutocompleteFragment"
    />
    <fragment 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"
              android:id="@+id/map"
              tools:context=".MapsActivity"
              android:name="com.google.android.gms.maps.SupportMapFragment"
              android:layout_below="@id/place_autocomplete_fragment"
              android:layout_above="@id/bottom_navigation"
    />
    <android.support.design.widget.BottomNavigationView
            android:id="@+id/bottom_navigation"
            app:menu="@menu/bottom_nav_menu"
            android:background="@color/colorPrimaryDark"
            android:layout_width="match_parent"
            app:itemIconTint="@color/common_google_signin_btn_text_dark_default"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true" android:layout_marginBottom="0dp"
            android:layout_alignParentLeft="true" android:layout_marginLeft="0dp"
            android:layout_alignParentStart="true" android:layout_marginStart="0dp"/>
</RelativeLayout>

fragment_a.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:orientation="vertical"
              android:background="@color/common_google_signin_btn_text_dark_pressed">

    <TextView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="Fragment A"
            android:gravity="center_vertical|center_horizontal"/>

</LinearLayout>

我在MapsActivity.kt.

中这样显示我的片段

class MapsActivity : AppCompatActivity(), OnMapReadyCallback {
        private val mOnNavigationItemSelectedListener = BottomNavigationView.OnNavigationItemSelectedListener {item->
        when(item.itemId){
            R.id.nav_map -> {
                Log.d(TAG, "map pressed")
                // if there's a fragment, close it

                return@OnNavigationItemSelectedListener true
            }
            R.id.nav_A -> {
                Log.d(TAG, "fragment A pressed")
                replaceFragment(FragmentA())
                return@OnNavigationItemSelectedListener true
            }
            R.id.nav_B -> {
                Log.d(TAG, "fragment B pressed")
                replaceFragment(FragmentB())
                return@OnNavigationItemSelectedListener true
            }
        }
        false
    }    

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_maps)
        val mapFragment = supportFragmentManager
            .findFragmentById(R.id.map) as SupportMapFragment
        mapFragment.getMapAsync(this)

        val bottomNavigation: BottomNavigationView = findViewById(R.id.bottom_navigation)
        bottomNavigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener)
}

    private fun replaceFragment(fragment: Fragment){
        val fragmentTransaction = supportFragmentManager.beginTransaction()

        fragmentTransaction.replace(R.id.fragmentContainer, fragment)
        fragmentTransaction.commit()
    }
...
...
}

我遇到的另一个问题，我会在解决当前 post 的问题后解决，但是有谁知道如何在我单击地图 Activity 图标时关闭当前片段在导航栏中？

Answer 1

像下面这样为片段的所有父布局添加背景

<?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                    xmlns:app="http://schemas.android.com/apk/res-auto"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
     *like this     android:background="#fff"
                    android:orientation="vertical"
                    android:id="@+id/fragmentContainer">

        <fragment
                android:id="@+id/place_autocomplete_fragment"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
             android:name="com.google.android.gms.location.places.ui.PlaceAutocompleteFragment"
        />
        <fragment 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"
                  android:id="@+id/map"
                  tools:context=".MapsActivity"
                  android:name="com.google.android.gms.maps.SupportMapFragment"
                  android:layout_below="@id/place_autocomplete_fragment"
                  android:layout_above="@id/bottom_navigation"
        />
        <android.support.design.widget.BottomNavigationView
                android:id="@+id/bottom_navigation"
                app:menu="@menu/bottom_nav_menu"
                android:background="@color/colorPrimaryDark"
                android:layout_width="match_parent"
                app:itemIconTint="@color/common_google_signin_btn_text_dark_default"
                android:layout_height="wrap_content"
                android:layout_alignParentBottom="true" android:layout_marginBottom="0dp"
                android:layout_alignParentLeft="true" android:layout_marginLeft="0dp"
                android:layout_alignParentStart="true" android:layout_marginStart="0dp"/>
    </RelativeLayout>

这应该有效并且另一个修复方法是将 android:clickable="true" 添加到片段视图因为这将使片段响应可能修复 'your click through' 问题的点击像这样
Fragment_a.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:clickable="true"
              android:orientation="vertical"
              android:background="@color/common_google_signin_btn_text_dark_pressed">

    <TextView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="Fragment A"
            android:gravity="center_vertical|center_horizontal"/>

</LinearLayout>

Android - 片段是 "transparent"，我可以点击它

Android - Fragment is "transparent", i'm able to click through it

android-fragments

android-activity

kotlin

bottomnavigationview