我有一个导航抽屉，其中有很多菜单项 . 我已经制作了一个片段“Home”，然后单击Home Fragment应该打开的Home菜单项 . 但它没有打开 .
我的java代码是：
package com.example.hsports.weddingplanner.Activities;
import android.support.design.widget.NavigationView;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.os.Handler;
import android.support.v7.widget.Toolbar;
import android.view.MenuItem;
import android.view.View;
import com.example.hsports.weddingplanner.Fragments.Home;
import com.example.hsports.weddingplanner.R;
public class FrontPage extends AppCompatActivity {
NavigationView navigationView;
DrawerLayout drawer;
Toolbar toolbar;
String nameOnTitleBar[];
int indexSelected=0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_front_page);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
drawer=(DrawerLayout)findViewById(R.id.drawer_layout);
navigationView=(NavigationView)findViewById(R.id.nav_view);
nameOnTitleBar=getResources().getStringArray(R.array.nav_list_items);
setupNavigationView();
}
private void setupNavigationView() {
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(MenuItem item) {
switch(item.getItemId())
{
case R.id.Home:
indexSelected=0;
markTheItemSelected(indexSelected);
changeNameofTitleBar(indexSelected);
fragmentTodisplay(indexSelected);
break;
case R.id.SignIn:
indexSelected=1;
markTheItemSelected(indexSelected);
changeNameofTitleBar(indexSelected);
fragmentTodisplay(indexSelected);
break;
case R.id.SignOut:
indexSelected=2;
markTheItemSelected(indexSelected);
changeNameofTitleBar(indexSelected);
fragmentTodisplay(indexSelected);
break;
case R.id.AboutUs:
indexSelected=3;
markTheItemSelected(indexSelected);
changeNameofTitleBar(indexSelected);
fragmentTodisplay(indexSelected);
break;
case R.id.ContactUs:
indexSelected=4;
markTheItemSelected(indexSelected);
changeNameofTitleBar(indexSelected);
fragmentTodisplay(indexSelected);
break;
}
drawer.closeDrawers();
return true;
}
});
ActionBarDrawerToggle actionBarDrawerToggle=new ActionBarDrawerToggle(this,drawer,toolbar,R.string.openDrawer,R.string.closeDrawer){
@Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
}
@Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
}
};
actionBarDrawerToggle.syncState();
}
private void fragmentTodisplay(int indexSelected) {
switch (indexSelected)
{
case 0:
Home obj=new Home();
FragmentTransaction transaction=getSupportFragmentManager().beginTransaction();
transaction.add(R.id.frame,obj,"HOME");
transaction.commit();
break;
}
}
private void markTheItemSelected(int indexSelected) {
navigationView.setCheckedItem(indexSelected);
}
private void changeNameofTitleBar(int indexSelected) {
toolbar.setTitle(nameOnTitleBar[indexSelected]);
}
}
片段代码如下：Home.java
package com.example.hsports.weddingplanner.Fragments;
import android.os.Bundle;
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.hsports.weddingplanner.R;
/**
* Created by I324671 on 11/27/2016.
*/
public class Home extends Fragment {
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
return inflater.inflate(R.layout.fragmentaboutus,container,false);
}
}
我的navoigation_drawer.xml是这样的：
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<group android:checkableBehavior="single"
>
<item
android:id="@+id/Home"
android:title="HOME"
/>
<item
android:id="@+id/SignIn"
android:title="SIGN-IN"
/>
<item
android:id="@+id/SignOut"
android:title="SIGN-OUT"
/>
</group>
<item android:title="OTHER">
<menu>
<item
android:id="@+id/AboutUs"
android:title="ABOUT US"/>
<item
android:id="@+id/ContactUs"
android:title="CONTACT US"
/>
<item
android:id="@+id/Share"
android:title="SHARE"
/>
</menu>
</item>
</menu>
fragmentaboutus.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Home"
/>
</LinearLayout>
现在，当我单击导航抽屉中的主页图标时，不会显示特定的主页片段 .
这是app_bar_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="match_parent"
android:layout_width="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:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:id="@+id/toolbar"
app:popupTheme="@style/AppTheme.PopupOverlay"
android:background="@color/blue"
>
</android.support.v7.widget.Toolbar>
</android.support.design.widget.AppBarLayout>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/frame"
></FrameLayout>
</android.support.design.widget.CoordinatorLayout>
Activity_front_page.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/drawer_layout"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="@layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<android.support.design.widget.NavigationView
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:menu="@menu/navigation_drawer"
android:id="@+id/nav_view"
></android.support.design.widget.NavigationView>
</android.support.v4.widget.DrawerLayout>
1 回答
尝试更换
同