我创建了一个新的Android Studio项目，我已经实现了基于Github项目的导航抽屉（qazxsw poi）
到目前为止，一切都很好，但我唯一的问题是碎片之间的导航无法正常工作。
我希望抽屉里的每个项目都打开一个单独的片段。
这是我的MainActivity.java
Mike Penz
这是我的activity_main.xml
package com.senseidev.isensei.activities;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import com.mikepenz.fontawesome_typeface_library.FontAwesome;
import com.mikepenz.google_material_typeface_library.GoogleMaterial;
import com.mikepenz.iconics.IconicsDrawable;
import com.mikepenz.materialdrawer.AccountHeader;
import com.mikepenz.materialdrawer.AccountHeaderBuilder;
import com.mikepenz.materialdrawer.Drawer;
import com.mikepenz.materialdrawer.DrawerBuilder;
import com.mikepenz.materialdrawer.model.ProfileDrawerItem;
import com.mikepenz.materialdrawer.model.ProfileSettingDrawerItem;
import com.mikepenz.materialdrawer.model.SecondaryDrawerItem;
import com.mikepenz.materialdrawer.model.interfaces.IDrawerItem;
import com.mikepenz.materialdrawer.model.interfaces.IProfile;
import com.senseidev.isensei.R;
import com.senseidev.isensei.fragments.HomeFragment;
import com.senseidev.isensei.fragments.PhotosFragment;
import com.senseidev.isensei.fragments.ProductsFragment;
import com.senseidev.isensei.fragments.ProfileFragment;
import com.senseidev.isensei.fragments.ServicesFragment;
public class MainActivity extends AppCompatActivity {
private static final int PROFILE_SETTING = 1;
private Toolbar mainToolbar;
private AccountHeader headerResult = null;
private Drawer result = null;
private IProfile profile_1;
private IProfile profile_2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mainToolbar = (Toolbar) findViewById(R.id.main_toolbar);
setSupportActionBar(mainToolbar);
getSupportActionBar().setTitle(R.string.app_name);
profile_1 = new ProfileDrawerItem().withName("Dev").withEmail("[email protected]").withIcon(getResources().getDrawable(R.drawable.ip_user_bi_photo));
profile_2 = new ProfileDrawerItem().withName("Isen").withEmail("[email protected]").withIcon(getResources().getDrawable(R.drawable.ip_user_bi_photo));
// Create the AccountHeader
buildHeader(false, savedInstanceState);
//create the drawer and remember the `Drawer` result object
result = new DrawerBuilder()
.withActivity(this)
.withAccountHeader(headerResult)
.withToolbar(mainToolbar)
.addDrawerItems(
new SecondaryDrawerItem().withName(R.string.drawer_profile)
.withSelectedIconColor(ContextCompat.getColor(this, R.color.app_belize)).withIconTintingEnabled(true)
.withIcon(new IconicsDrawable(this, GoogleMaterial.Icon.gmd_account_box).actionBar().colorRes(R.color.material_drawer_dark_primary_text))
.withTag("Bullhorn"),
new SecondaryDrawerItem().withName(R.string.drawer_services)
.withSelectedIconColor(ContextCompat.getColor(this, R.color.app_belize)).withIconTintingEnabled(true)
.withIcon(new IconicsDrawable(this, GoogleMaterial.Icon.gmd_device_hub).actionBar().colorRes(R.color.material_drawer_dark_primary_text))
.withTag("Bullhorn"),
new SecondaryDrawerItem().withName(R.string.drawer_products)
.withSelectedIconColor(ContextCompat.getColor(this, R.color.app_belize)).withIconTintingEnabled(true)
.withIcon(new IconicsDrawable(this, GoogleMaterial.Icon.gmd_shopping_cart).actionBar().colorRes(R.color.material_drawer_dark_primary_text))
.withTag("Bullhorn"),
new SecondaryDrawerItem().withName(R.string.drawer_images)
.withSelectedIconColor(ContextCompat.getColor(this, R.color.app_belize)).withIconTintingEnabled(true)
.withIcon(new IconicsDrawable(this, GoogleMaterial.Icon.gmd_camera_roll).actionBar().colorRes(R.color.material_drawer_dark_primary_text))
.withTag("Bullhorn")
)
.withOnDrawerItemClickListener(new Drawer.OnDrawerItemClickListener() {
@Override
public boolean onItemClick(View view, int position, IDrawerItem drawerItem) {
// do something with the clicked item :D
selectDrawerItem((int) drawerItem.getIdentifier(), drawerItem);
return true;
}
})
.addStickyDrawerItems(
new SecondaryDrawerItem().withName(R.string.drawer_all_right_reserved).withIcon(FontAwesome.Icon.faw_copyright).withEnabled(false)
).build();
}
/**
* small helper method to reuse the logic to build the AccountHeader
* this will be used to replace the header of the drawer with a compact/normal header
*
* @param compact
* @param savedInstanceState
*/
private void buildHeader(boolean compact, Bundle savedInstanceState) {
headerResult = new AccountHeaderBuilder()
.withActivity(this)
.withHeaderBackground(R.drawable.ip_menu_header_bg)
.withCompactStyle(compact)
.addProfiles(
profile_1,
profile_2,
new ProfileSettingDrawerItem()
.withName("Add Account")
.withDescription("Add new GitHub Account")
.withIcon(new IconicsDrawable(this, GoogleMaterial.Icon.gmd_add)
.actionBar().paddingDp(5).colorRes(R.color.material_drawer_dark_primary_text)).withIdentifier(PROFILE_SETTING),
new ProfileSettingDrawerItem().withName("Manage Account").withIcon(GoogleMaterial.Icon.gmd_settings)
)
.withOnAccountHeaderListener(new AccountHeader.OnAccountHeaderListener() {
@Override
public boolean onProfileChanged(View view, IProfile profile, boolean current) {
//sample usage of the onProfileChanged listener
//if the clicked item has the identifier 1 add a new profile ;)
if (profile instanceof IDrawerItem && ((IDrawerItem) profile).getIdentifier() == PROFILE_SETTING) {
IProfile newProfile = new ProfileDrawerItem()
.withNameShown(true)
.withName("Kensei")
.withEmail("[email protected]")
.withIcon(getResources().getDrawable(R.drawable.ip_user_bi_photo));
if (headerResult.getProfiles() != null) {
//we know that there are 2 setting elements. set the new profile above them ;)
headerResult.addProfile(newProfile, headerResult.getProfiles().size() - 2);
} else {
headerResult.addProfiles(newProfile);
}
}
//false if you have not consumed the event and it should close the drawer
return false;
}
})
.build();
}
public void selectDrawerItem(int ItemId, IDrawerItem drawerItem) {
// Create a new fragment and specify the fragment to show based on nav item clicked
Fragment fragment = null;
Class fragmentClass;
switch (ItemId) {
case 1:
fragmentClass = ProfileFragment.class;
break;
case 2:
fragmentClass = ServicesFragment.class;
break;
case 3:
fragmentClass = ProductsFragment.class;
break;
case 4:
fragmentClass = PhotosFragment.class;
break;
default:
fragmentClass = HomeFragment.class;
}
try {
fragment = (Fragment) fragmentClass.newInstance();
} catch (Exception e) {
e.printStackTrace();
}
// Insert the fragment by replacing any existing fragment
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(R.id.flContent, fragment).commit();
result.closeDrawer();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
default:
return super.onOptionsItemSelected(item);
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
//add the values which need to be saved from the drawer to the bundle
outState = result.saveInstanceState(outState);
//add the values which need to be saved from the accountHeader to the bundle
outState = headerResult.saveInstanceState(outState);
super.onSaveInstanceState(outState);
}
@Override
public void onBackPressed() {
//handle the back press :D close the drawer first and if the drawer is closed close the activity
if (result != null && result.isDrawerOpen()) {
result.closeDrawer();
} else {
super.onBackPressed();
}
}
}
这是我的HomeFragment.java
<?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"
tools:context="com.senseidev.isensei.activities.MainActivity">
<android.support.v7.widget.Toolbar
android:id="@+id/main_toolbar"
android:layout_width="match_parent"
android:layout_height="?android:attr/actionBarSize"
android:background="@color/colorPrimary">
</android.support.v7.widget.Toolbar>
<FrameLayout
android:id="@+id/flContent"
android:layout_width="match_parent"
android:layout_height="match_parent">
</FrameLayout>
</RelativeLayout>
这是我的fragment_home.xml
package com.project.app.fragments;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.project.app.R;
/**
* A simple {@link Fragment} subclass.
*/
public class HomeFragment extends Fragment {
public HomeFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_home, container, false);
return view;
}
}
您的XLM活动布局应首先具有framelayout插槽，以便添加和替换您的片段。
添加这个新方法，该方法将负责根据从抽屉中选择的项目ID创建片段并将其添加到活动中：
<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.senseidev.isensei.fragments.HomeFragment">
<!-- TODO: Update blank fragment layout -->
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_vertical"
android:text="HOME" />
</FrameLayout>
从withOnDrawerItemClickListener调用此方法，如下所示：
public void selectDrawerItem(int ItemId,IDrawerItem drawerItem) {
// Create a new fragment and specify the fragment to show based on nav item clicked
Fragment fragment = null;
Class fragmentClass;
switch(ItemId) {
case 1:
fragmentClass = PageFragment2.class;
break;
case 2:
fragmentClass = PageFragment2.class;
break;
default:
fragmentClass = PageFragment2.class;
}
try {
fragment = (Fragment) fragmentClass.newInstance();
} catch (Exception e) {
e.printStackTrace();
}
// Insert the fragment by replacing any existing fragment
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction().replace(R.id.flContent, fragment).commit();
result.closeDrawer();
}
这可能无法模拟要求，但会为您提供逻辑，祝您好运。
添加.withIdentifier（）
.withOnDrawerItemClickListener(new Drawer.OnDrawerItemClickListener() {
@Override
public boolean onItemClick(View view, int position, IDrawerItem drawerItem)
{
// do something with the clicked item :D
selectDrawerItem((int)drawerItem.getIdentifier(), drawerItem);
return true;
}
})