如何在其活动布局上覆盖片段布局？

时间：2018-06-24 08:05:31

标签： java android

因此，我有一个“主页”活动，其中包含一个导航抽屉，我有一个名为“ Trade”的标签，同样，我还有一个名为“ Trade”的标签（以及其他几个标签，可以通过一个viewpager）。当用户在导航抽屉中选择“交易”时，将创建一个名为Trade.java的片段，并激活其布局。问题是，当触发片段的布局时，它不会在活动布局的顶部创建，因此当我与其片段布局（片段的）进行交互时，它不会干扰活动布局。相反，它正在做的是创建片段的布局并在屏幕上显示它，但是我仍然可以在活动布局中的选项卡上滑动（通过viewpager）。我将使Trade类成为活动，但是由于TabLayout也正在使用它（不仅是导航抽屉），所以我不能这样做。

这是首页活动

import android.content.Intent;
import android.support.annotation.NonNull;
import android.support.design.widget.NavigationView;
import android.support.design.widget.TabLayout;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.view.GravityCompat;
import android.support.v4.view.ViewPager;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.view.MenuItem;
import android.widget.Toast;

import com.example.alexl.silkroadja.NavigationDrawer.Account;
import com.example.alexl.silkroadja.NavigationDrawer.Categories;
import com.example.alexl.silkroadja.NavigationDrawer.Messages;
import com.example.alexl.silkroadja.NavigationDrawer.Notifications;
import com.example.alexl.silkroadja.NavigationDrawer.Settings_Preferences;
import com.example.alexl.silkroadja.NavigationDrawer.Trade;
import com.example.alexl.silkroadja.NavigationDrawer.TradeHistory;
import com.example.alexl.silkroadja.NavigationDrawer.WatchList;
import com.google.firebase.database.FirebaseDatabase;

public class Homepage extends AppCompatActivity {

    private DrawerLayout drawerLayout;
    private FirebaseDatabase fb;

    private TabLayout tabLayout;
    private ViewPager viewPager;
    public TabsPagerAdapter pagerAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_homepage);


        Toast.makeText(this, "You are now in the " + getClass().getName() + " class",Toast.LENGTH_LONG).show();
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        ActionBar actionbar = getSupportActionBar();
        actionbar.setDisplayHomeAsUpEnabled(true);
        actionbar.setHomeAsUpIndicator(R.drawable.hamburger_menu);

        tabLayout = findViewById(R.id.tabs);
        viewPager = findViewById(R.id.viewPager);
        drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);

        navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem item) {
                item.setChecked(true); // Item will stay highlighted when clicked


                switch(item.getItemId())
                {
                    case R.id.Homepage:
                        drawerLayout.closeDrawers();
                        break;
                    case R.id.Account:
                        startActivity(new Intent(getApplicationContext(), Account.class));
                        drawerLayout.closeDrawers();
                        break;
                    case R.id.Notifications:
                        startActivity(new Intent(getApplicationContext(), Notifications.class));
                        drawerLayout.closeDrawers();
                        break;
                    case R.id.Messages:
                        startActivity(new Intent(getApplicationContext(), Messages.class));
                        drawerLayout.closeDrawers();
                        break;
                    case R.id.Categories:
                        startActivity(new Intent(getApplicationContext(), Categories.class));
                        drawerLayout.closeDrawers();
                        break;
                    case R.id.Trade:
                        openFragment(new Trade());
                        drawerLayout.closeDrawers();
                        break;
                    case R.id.WatchList:
                        openFragment(new WatchList());
                        drawerLayout.closeDrawers();
                        break;
                    case R.id.TradeHistory:
                        startActivity(new Intent(getApplicationContext(), TradeHistory.class));
                        drawerLayout.closeDrawers();
                        break;
                    case R.id.Settings:
                        startActivity(new Intent(getApplicationContext(), Settings_Preferences.class));
                        drawerLayout.closeDrawers();
                        break;
                    default:
                        break;
                }
                return true;
            }
        });

        setUpViewPager();
    }

    public void openFragment(Fragment fragment)
    {
        FragmentManager fm = getSupportFragmentManager();
        FragmentTransaction ft = fm.beginTransaction();
        ft.replace(R.id.fragment_container, fragment);
        ft.addToBackStack(null);
        ft.commit();
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch(item.getItemId())
        {
            case android.R.id.home:
                drawerLayout.openDrawer(GravityCompat.START);
        }
        return super.onOptionsItemSelected(item);
    }

    private void setUpViewPager()
    {
        pagerAdapter = new TabsPagerAdapter(getSupportFragmentManager());
        pagerAdapter.addFragment(new Items());
        pagerAdapter.addFragment(new Services());
        pagerAdapter.addFragment(new Trade());
        pagerAdapter.addFragment(new WatchList());

        viewPager.setAdapter(pagerAdapter);
        tabLayout.setupWithViewPager(viewPager);
        tabLayout.getTabAt(0).setText("Items");
        tabLayout.getTabAt(1).setText("Services");
        tabLayout.getTabAt(2).setText("Trade");
        tabLayout.getTabAt(3).setText("Watch List");
    }
}

这是首页的布局

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout
    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:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true">

    <RelativeLayout
        android:id="@+id/main_content_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?android:attr/actionBarSize"
            android:background="?android:attr/colorPrimary"
            android:theme="@style/ThemeOverlay.AppCompat.ActionBar"></android.support.v7.widget.Toolbar>

        <android.support.design.widget.CoordinatorLayout
            android:id="@+id/coordinator_layout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_below="@id/toolbar"
            tools:context=".NavigationDrawer.Categories">

            <android.support.design.widget.AppBarLayout
                android:id="@+id/appBar"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:background="@color/TestColor"
                android:elevation="10dp"
                android:fitsSystemWindows="true">

                <android.support.design.widget.CollapsingToolbarLayout
                    android:id="@+id/collapsing_toolbar"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    app:layout_scrollFlags="scroll|exitUntilCollapsed">

                    <android.support.design.widget.TabLayout
                        android:id="@+id/tabs"
                        android:layout_width="match_parent"
                        android:layout_height="50dp"
                        app:tabMode="scrollable"
                        app:layout_collapseMode="parallax"></android.support.design.widget.TabLayout>

                </android.support.design.widget.CollapsingToolbarLayout>

            </android.support.design.widget.AppBarLayout>

                    <android.support.v4.view.ViewPager
                        android:id="@+id/viewPager"
                        android:layout_width="match_parent"
                        android:layout_height="match_parent"
                        app:layout_behavior="@string/appbar_scrolling_view_behavior"></android.support.v4.view.ViewPager>

        </android.support.design.widget.CoordinatorLayout>

        <FrameLayout
            android:id="@+id/fragment_container"
            android:layout_width="match_parent"
            android:layout_height="match_parent">
        </FrameLayout>

    </RelativeLayout>

    <android.support.design.widget.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="left"
        android:fitsSystemWindows="true"
        app:menu="@menu/nav_menu">
    </android.support.design.widget.NavigationView>

</android.support.v4.widget.DrawerLayout>

交易片段类

import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.example.alexl.silkroadja.R;

public class Trade extends Fragment
{
    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.trade_layout, container, false);
        return view;
    }
}

交易片段布局

<?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"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Hello There "
        android:textSize="20dp"
        android:layout_centerInParent="true"
        android:gravity="center_horizontal"/>
</RelativeLayout>

这是显示我的问题的几个屏幕截图

Before selecting Trade

Selecting Trade

TextView with Black background is from fragment

You can still swipe to different tabs, which I don't want

0 个答案:

没有答案
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