如何将片段附加到 Navigationview
How to attach fragment to Navigationview
我在我的应用程序中使用 NaivgationView，当我从抽屉中 select 项目时，我设置的片段视图没有显示。我还添加了它显示的吐司，而我 select 任何人都可以帮我解决这个问题吗？
public class MainActivity extends AppCompatActivity
{
private DrawerLayout drawerLayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
//Setting Navigation View Item Selected Listener to handle the item click of the navigation menu
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
// This method will trigger on item Click of navigation menu
@Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
FragmentManager fragmentManager = getFragmentManager();
//Checking if the item is in checked state or not, if not make it in checked state
if(menuItem.isChecked()) menuItem.setChecked(false);
else menuItem.setChecked(true);
//Closing drawer on item click
drawerLayout.closeDrawers();
//Check to see which item was being clicked and perform appropriate action
switch (menuItem.getItemId()){
//Replacing the main content with ContentFragment Which is our Inbox View;
case R.id.home:
Toast.makeText(getApplicationContext(),"Inbox Selected", Toast.LENGTH_SHORT).show();
return true;
// For rest of the options we just show a toast on click
case R.id.be_the_donor:
Toast.makeText(getApplicationContext(),"Stared Selected",Toast.LENGTH_SHORT).show();
RegisterDonor frag = new RegisterDonor();
// update the main content by replacing fragments
fragmentManager.beginTransaction()
.replace(R.id.frame_container, frag)
.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN)
.addToBackStack(null)
.commit();
return true;
case R.id.search_donor:
Toast.makeText(getApplicationContext(),"Send Selected",Toast.LENGTH_SHORT).show();
return true;
case R.id.tools:
Toast.makeText(getApplicationContext(),"Drafts Selected",Toast.LENGTH_SHORT).show();
return true;
default:
Toast.makeText(getApplicationContext(),"Somethings Wrong",Toast.LENGTH_SHORT).show();
return true;
}
}
});
// Initializing Drawer Layout and ActionBarToggle
drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle actionBarDrawerToggle = new ActionBarDrawerToggle(this,drawerLayout,toolbar,R.string.navigation_drawer_open, R.string.navigation_drawer_close){
@Override
public void onDrawerClosed(View drawerView) {
// Code here will be triggered once the drawer closes as we dont want anything to happen so we leave this blank
super.onDrawerClosed(drawerView);
}
@Override
public void onDrawerOpened(View drawerView) {
// Code here will be triggered once the drawer open as we dont want anything to happen so we leave this blank
super.onDrawerOpened(drawerView);
}
};
//Setting the actionbarToggle to drawer layout
drawerLayout.setDrawerListener(actionBarDrawerToggle);
//calling sync state is necessay or else your hamburger icon wont show up
actionBarDrawerToggle.syncState();
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
片段
public class RegisterDonor extends Fragment{
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.register_donor, container, false);
return rootView;
}
}
activity_main.xml
<?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"
tools:openDrawer="start">
<LinearLayout
android:layout_height="match_parent"
android:layout_width="match_parent"
android:orientation="vertical"
>
<include
layout="@layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<FrameLayout
android:id="@+id/frame_container"
android:layout_width="match_parent"
android:layout_height="match_parent">
</FrameLayout>
</LinearLayout>
<android.support.design.widget.NavigationView
android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="@layout/nav_header_main"
app:menu="@menu/activity_main_drawer" />
</android.support.v4.widget.DrawerLayout>
content_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context="com.example.dayshift.bloodfinder.MainActivity"
tools:showIn="@layout/app_bar_main">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
register_donor
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.TextInputLayout
android:id="@+id/usernameWrapper"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<EditText
android:id="@+id/register_donor_username"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textEmailAddress"
android:hint="Enter Name"/>
</android.support.design.widget.TextInputLayout>
<android.support.design.widget.TextInputLayout
android:id="@+id/mobileWrapper"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<EditText
android:id="@+id/register_donor_mobile"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="number"
android:hint="Enter Mobile"/>
</android.support.design.widget.TextInputLayout>
<com.weiwangcn.betterspinner.library.material.MaterialBetterSpinner
android:id="@+id/register_donor_bloodgroup"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Material Design Spinner"
android:textColorHint="#05ab9a"
app:met_floatingLabel="normal" />
<com.weiwangcn.betterspinner.library.material.MaterialBetterSpinner
android:id="@+id/register_donor_city"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Material Design Spinner"
android:textColorHint="#05ab9a"
app:met_floatingLabel="normal" />
<AutoCompleteTextView
android:id="@+id/register_donor_area"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:text="">
<requestFocus />
</AutoCompleteTextView>
</LinearLayout>
你说 Toast 出现了，但片段没有出现，所以问题可能出在 FragmentManager
检查你导入的 fragmentManager 应该是
import android.support.v4.app.FragmentManager;
不应该是
import android.app.FragmentManager;
而你的碎片交易应该是这样的
FragmentManager fragmentManager = getSupportFragmentManager();
RegisterDonor frag = new RegisterDonor();
fragmentManager.beginTransaction()
.replace(R.id.frame_container, frag , "")
.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN)
.addToBackStack(null)
.commit();
希望对您有所帮助！
在 activity_main_drawer 中，在 onNavigationItemSelected 方法的 mainactivity 中为您的 ID 声明您的片段并提交
尝试这种方式，我想它工作正常:
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
int id = menuItem.getItemId();
switch (id) {
case R.id.be_the_donor:
Fragment registerDonor = new RegisterDonor();
fragmentTransaction.replace(R.id.frame_container, registerDonor);
fragmentTransaction.commit();
drawerLayout.closeDrawers();
break;
您的应用栏占据了整个屏幕。
<include
layout="@layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<FrameLayout
android:id="@+id/frame_container"
android:layout_width="match_parent"
android:layout_height="match_parent">
</FrameLayout>
更改应用栏以在高度上包裹内容
我在我的应用程序中使用 NaivgationView，当我从抽屉中 select 项目时，我设置的片段视图没有显示。我还添加了它显示的吐司，而我 select 任何人都可以帮我解决这个问题吗？
public class MainActivity extends AppCompatActivity
{
private DrawerLayout drawerLayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
//Setting Navigation View Item Selected Listener to handle the item click of the navigation menu
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
// This method will trigger on item Click of navigation menu
@Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
FragmentManager fragmentManager = getFragmentManager();
//Checking if the item is in checked state or not, if not make it in checked state
if(menuItem.isChecked()) menuItem.setChecked(false);
else menuItem.setChecked(true);
//Closing drawer on item click
drawerLayout.closeDrawers();
//Check to see which item was being clicked and perform appropriate action
switch (menuItem.getItemId()){
//Replacing the main content with ContentFragment Which is our Inbox View;
case R.id.home:
Toast.makeText(getApplicationContext(),"Inbox Selected", Toast.LENGTH_SHORT).show();
return true;
// For rest of the options we just show a toast on click
case R.id.be_the_donor:
Toast.makeText(getApplicationContext(),"Stared Selected",Toast.LENGTH_SHORT).show();
RegisterDonor frag = new RegisterDonor();
// update the main content by replacing fragments
fragmentManager.beginTransaction()
.replace(R.id.frame_container, frag)
.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN)
.addToBackStack(null)
.commit();
return true;
case R.id.search_donor:
Toast.makeText(getApplicationContext(),"Send Selected",Toast.LENGTH_SHORT).show();
return true;
case R.id.tools:
Toast.makeText(getApplicationContext(),"Drafts Selected",Toast.LENGTH_SHORT).show();
return true;
default:
Toast.makeText(getApplicationContext(),"Somethings Wrong",Toast.LENGTH_SHORT).show();
return true;
}
}
});
// Initializing Drawer Layout and ActionBarToggle
drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle actionBarDrawerToggle = new ActionBarDrawerToggle(this,drawerLayout,toolbar,R.string.navigation_drawer_open, R.string.navigation_drawer_close){
@Override
public void onDrawerClosed(View drawerView) {
// Code here will be triggered once the drawer closes as we dont want anything to happen so we leave this blank
super.onDrawerClosed(drawerView);
}
@Override
public void onDrawerOpened(View drawerView) {
// Code here will be triggered once the drawer open as we dont want anything to happen so we leave this blank
super.onDrawerOpened(drawerView);
}
};
//Setting the actionbarToggle to drawer layout
drawerLayout.setDrawerListener(actionBarDrawerToggle);
//calling sync state is necessay or else your hamburger icon wont show up
actionBarDrawerToggle.syncState();
}
@Override
public void onBackPressed() {
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
if (drawer.isDrawerOpen(GravityCompat.START)) {
drawer.closeDrawer(GravityCompat.START);
} else {
super.onBackPressed();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
片段
public class RegisterDonor extends Fragment{
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.register_donor, container, false);
return rootView;
}
}
activity_main.xml
<?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"
tools:openDrawer="start">
<LinearLayout
android:layout_height="match_parent"
android:layout_width="match_parent"
android:orientation="vertical"
>
<include
layout="@layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<FrameLayout
android:id="@+id/frame_container"
android:layout_width="match_parent"
android:layout_height="match_parent">
</FrameLayout>
</LinearLayout>
<android.support.design.widget.NavigationView
android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="@layout/nav_header_main"
app:menu="@menu/activity_main_drawer" />
</android.support.v4.widget.DrawerLayout>
content_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context="com.example.dayshift.bloodfinder.MainActivity"
tools:showIn="@layout/app_bar_main">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
register_donor
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.TextInputLayout
android:id="@+id/usernameWrapper"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<EditText
android:id="@+id/register_donor_username"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textEmailAddress"
android:hint="Enter Name"/>
</android.support.design.widget.TextInputLayout>
<android.support.design.widget.TextInputLayout
android:id="@+id/mobileWrapper"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<EditText
android:id="@+id/register_donor_mobile"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="number"
android:hint="Enter Mobile"/>
</android.support.design.widget.TextInputLayout>
<com.weiwangcn.betterspinner.library.material.MaterialBetterSpinner
android:id="@+id/register_donor_bloodgroup"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Material Design Spinner"
android:textColorHint="#05ab9a"
app:met_floatingLabel="normal" />
<com.weiwangcn.betterspinner.library.material.MaterialBetterSpinner
android:id="@+id/register_donor_city"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Material Design Spinner"
android:textColorHint="#05ab9a"
app:met_floatingLabel="normal" />
<AutoCompleteTextView
android:id="@+id/register_donor_area"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:text="">
<requestFocus />
</AutoCompleteTextView>
</LinearLayout>
你说 Toast 出现了，但片段没有出现，所以问题可能出在 FragmentManager
检查你导入的 fragmentManager 应该是
import android.support.v4.app.FragmentManager;
不应该是
import android.app.FragmentManager;
而你的碎片交易应该是这样的
FragmentManager fragmentManager = getSupportFragmentManager();
RegisterDonor frag = new RegisterDonor();
fragmentManager.beginTransaction()
.replace(R.id.frame_container, frag , "")
.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN)
.addToBackStack(null)
.commit();
希望对您有所帮助！
在 activity_main_drawer 中，在 onNavigationItemSelected 方法的 mainactivity 中为您的 ID 声明您的片段并提交
尝试这种方式，我想它工作正常:
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
int id = menuItem.getItemId();
switch (id) {
case R.id.be_the_donor:
Fragment registerDonor = new RegisterDonor();
fragmentTransaction.replace(R.id.frame_container, registerDonor);
fragmentTransaction.commit();
drawerLayout.closeDrawers();
break;
您的应用栏占据了整个屏幕。
<include
layout="@layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<FrameLayout
android:id="@+id/frame_container"
android:layout_width="match_parent"
android:layout_height="match_parent">
</FrameLayout>
更改应用栏以在高度上包裹内容