带有片段或活动的 Android Studio 导航抽屉 [英] Android studio navigation drawer with fragment or activities

问题描述

我正在尝试使用 Android Studio 的导航抽屉模板开发应用程序.所以，我使用这个模板创建了一个新项目.但是当我运行程序并单击菜单项时，视图不会改变.我在互联网上到处搜索，但我不知道如何处理.

I'm trying to develop an application using the Navigation drawer template of Android Studio. So, I created a new project using this template. But when I run the program and click on a menu item, the view doesn't change. I searched everywhere on internet, but I didn't see how I can handle this.

这是Android Studio提供的代码:

This is the code provided by Android Studio:

 public boolean onNavigationItemSelected(MenuItem item) {
    // Handle navigation view item clicks here.

    int id = item.getItemId();

    if (id == R.id.nav_camara) {


    } else if (id == R.id.nav_gallery) {

    } else if (id == R.id.nav_slideshow) {

    } else if (id == R.id.nav_manage) {

    } else if (id == R.id.nav_share) {

    } else if (id == R.id.nav_send) {

    }

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    drawer.closeDrawer(GravityCompat.START);
    return true;
}

我想要实现的是将当前视图替换为单击菜单项的适当视图.

What I want to achieve is to replace the current view with the appropriate view for the menu item clicked.

Fragment 是实现此目的的最佳方式，还是应该为每个菜单项创建不同的活动?

Is Fragment the best way to do this or should I create a different activity for each menu item?

推荐答案

在您的情况下，添加片段将是最佳解决方案.

In your case adding fragment will be the best solution.

创建一个片段 BlankFragment.java

create a fragment BlankFragment.java

public class BlankFragment extends Fragment {

    public BlankFragment() {
        // Required empty public constructor
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.fragment_blank, container, false);
    }

}

并创建 fragment_black.xml

and create fragment_black.xml

    <FrameLayout 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"
    tools:context="com.above_inc.shyam.drawer.BlankFragment">

    <!-- TODO: Update blank fragment layout -->
    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:text="@string/hello_blank_fragment" />

</FrameLayout>

现在替换你的方法

public boolean onNavigationItemSelected(MenuItem item) {
    // Handle navigation view item clicks here.
    int id = item.getItemId();

    Fragment fragment = null;
    if (id == R.id.nav_camera) {
        // Handle the camera action
        fragment = new BlankFragment();
    } else if (id == R.id.nav_gallery) {

    } else if (id == R.id.nav_slideshow) {

    } else if (id == R.id.nav_manage) {

    } else if (id == R.id.nav_share) {

    } else if (id == R.id.nav_send) {

    }

    if (fragment != null) {
        FragmentManager fragmentManager = getSupportFragmentManager();
        fragmentManager.beginTransaction()
                .replace(R.id.frame_container, fragment).commit();

    }
    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    drawer.closeDrawer(GravityCompat.START);
    return true;

}

在 content_main.xml 中添加以下代码

add below code in your content_main.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"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="com.above_inc.shyam.drawer.MainActivity"
    tools:showIn="@layout/app_bar_main">


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

你也可以在上面的代码中添加更多片段到与相机相同的其他选项

you can also add more fragment to other options same as camera in above code

这篇关于带有片段或活动的 Android Studio 导航抽屉的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！