导航抽屉切换活动而不是片段

Question

是否可以在Android中使用导航抽屉,但不是更新片段,我想在应用程序中切换活动作为我的导航方式.

Answer 1

是的,这是可能的 - 这就是我为我的应用所做的.我已经设置了许多活动,而不是将它们全部转换为碎片,我想要定制导航抽屉以适应所有这些活动.不幸的是,这不是一个快速的解决方法,所以如果您可以选择使用片段,我会继续使用它.但不管这是我怎么做的:

假设我有2个活动,我想要有导航抽屉.在layout.xml每个,我指定一个DrawerLayout具有适当ListView持有我的导航选项.基本上,每次我在活动之间切换时都会生成导航抽屉,从而提供持久的外观.为了让生活更轻松,我采用了设置导航抽屉所需的常用方法并将它们放在自己的类中:NavigationDrawerSetup.java.这样我的活动可以使用相同的自定义适配器等.

在这NavigationDrawerSetup.java堂课中,我有以下内容:

• configureDrawer()-这树立ActionBar, ActionBarDrawerToggle以及所需的听众
• 我的自定义数组适配器(用于填充列表中的导航选项)
• 该selectOptions()方法处理抽屉项目点击

当您在活动中的一个内设置抽屉式导航您只需创建一个新的NavigationDrawerSetup对象,并通过在所需的布局参数(如DrawerLayout,ListView等).然后你打电话configureDrawer():

        navigationDrawer = new NavigationDrawerSetup(mDrawerView, mDrawerLayout,
            mDrawerList, actionBar, mNavOptions, currentActivity);

    navigationDrawer.configureDrawer();

currentActivity由于导航抽屉与您所在的活动相关联,因此传入.您必须在设置时使用它ActionBarDrawerToggle:

mDrawerToggle = new ActionBarDrawerToggle(currentActivity, // host Activity
        mDrawerLayout, /* DrawerLayout object */
        R.drawable.ic_drawer, /* nav drawer image to replace 'Up' caret */
        R.string.drawer_open, /* "open drawer" description for accessibility */
        R.string.drawer_close /* "close drawer" description for accessibility */
        )

currentActivity设置自定义时还需要使用Adapter:

至于如何通过导航抽屉切换活动,您可以在selectItem()方法中设置新的意图:

private void selectItem(int position) {

    // Handle Navigation Options
    Intent intent;
    switch (position) {
        case 0:
            intent = new Intent(currentActivity, NewActivity.class);
            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
            currentActivity.startActivity(intent);
            break;
        case 1: 
            // etc.
    }

只需确保您的新设备Activity也有导航抽屉设置,它应该显示.

你可以做很多事情来根据自己的需要定制这个方法,但这是我如何做到这一点的一般结构.希望这可以帮助!

Answer 2

您需要一个BaseDrawerActivity实现导航抽屉的工具然后扩展BaseDrawerActivity您需要导航抽屉的每个活动.

首先创建BaseDrawerActivity.java:

public class BaseDrawerActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener{

    DrawerLayout drawerLayout;
    Toolbar toolbar;
    FrameLayout frameLayout;
    NavigationView navigationView;

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

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        frameLayout = (FrameLayout) findViewById(R.id.content_frame);

        drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
            this, drawerLayout, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
        drawerLayout.setDrawerListener(toggle);
        toggle.syncState();

        navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);
    }

    @Override
    public void onBackPressed() {
        if (drawerLayout.isDrawerOpen(GravityCompat.START)) {
            drawerLayout.closeDrawer(GravityCompat.START);
        } else {
            super.onBackPressed();
        }
    }

    @Override
    public boolean onNavigationItemSelected(MenuItem item) {
        int id = item.getItemId();

        //to prevent current item select over and over
        if (item.isChecked()){
            drawerLayout.closeDrawer(GravityCompat.START);
            return false;
        }

        if (id == R.id.nav_camera) {
            // Handle the camera action
            startActivity(new Intent(getApplicationContext(), CameraActivity.class));
        } else if (id == R.id.nav_gallery) {
            startActivity(new Intent(getApplicationContext(), GalleryActivity.class));
        } else if (id == R.id.nav_slideshow) {
            startActivity(new Intent(getApplicationContext(), SlideshowActivity.class));
        } else if (id == R.id.nav_manage) {
            startActivity(new Intent(getApplicationContext(), ManageActivity.class));
        } else if (id == R.id.nav_share) {
            startActivity(new Intent(getApplicationContext(), ShareActivity.class));
        } else if (id == R.id.nav_send) {
            startActivity(new Intent(getApplicationContext(), SendActivity.class));
        }
        drawerLayout.closeDrawer(GravityCompat.START);
        return true;
    }
}

然后activity_base_drawer.xml在res/layout文件夹中创建:

<?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"
    tools:openDrawer="start">

    <include layout="@layout/app_bar_home"/>

    <android.support.design.widget.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        app:headerLayout="@layout/nav_header_home"
        app:menu="@menu/activity_home_drawer" />

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

在哪里@layout/app_bar_home:

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout 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:fitsSystemWindows="true">

    <android.support.design.widget.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:popupTheme="@style/AppTheme.PopupOverlay" />

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

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

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

接下来,输入将具有导航抽屉的活动,例如CameraActivity.java:

public class CameraActivity extends BaseDrawerActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getLayoutInflater().inflate(R.layout.activity_camera, frameLayout);

        /**
        * Setting title
        */
        setTitle("Camera");

    }

    @Override
    protected void onResume() {
        super.onResume();
        // to check current activity in the navigation drawer
        navigationView.getMenu().getItem(0).setChecked(true);
    }
}

R.layout.activity_camera你的布局在哪里CameraActivity.java.

然后创建其他类似于Activity的GalleryActivity.java导航抽屉:

public class GalleryActivity extends BaseDrawerActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getLayoutInflater().inflate(R.layout.activity_gallery, frameLayout);

        // Setting title
        setTitle("Gallery");

    }

    @Override
    protected void onResume() {
        super.onResume();
        navigationView.getMenu().getItem(1).setChecked(true);
    }
}