导航的 BaseActivity
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【中文标题】导航的 BaseActivity【英文标题】：BaseActivity for Navigation 【发布时间】：2016-01-05 16:51:40 【问题描述】：我正在构建一个用于导航的基本 Activity，并且想要一些灵活的东西，因此 Activity 向 Base Activity 指示要膨胀的布局。
我有以下
public abstract class BaseActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener
private int mLayoutRes;
protected void setLayout(int layoutRes)
mLayoutRes = layoutRes;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(mLayoutRes);
// Layout implements toolbar
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
if (toolbar != null)
setSupportActionBar(toolbar);
DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
// The layout implements the nav
if (drawer != null)
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.setDrawerListener(toggle);
toggle.syncState();
NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
// Other Nav code ommitted as its too verbose
然后 Layout 从 Activity 传递如下
public class Home extends BaseActivity
private final String TAG = "Home";
@Override
protected void onCreate(Bundle savedInstanceState)
super.setLayout(R.layout.activity_home);
super.onCreate(savedInstanceState);
// Other Activity code
有没有更好的方法来实现这一点？ 也许设置一个带有内容框架的基本布局并膨胀到其中？
任何建议将不胜感激。
【问题讨论】：
从概念上讲，在基类中定义 getLayout() 并在子类中覆盖它会更好。 super.set() 不是你经常看到的。 【参考方案1】：您可以通过 Google IO 应用程序关注 BaseActivity。只需覆盖setContentView，您就不需要setLayout
这是我的 BaseActivity
package com.vtcmobile.kqviet.activity;
public class BaseActivity extends AppCompatActivity
private Toolbar toolbar;
private DrawerLayout drawerLayout;
private ActionBarDrawerToggle drawerToggle;
private NavigationView navigationView;
protected Context mContext;
public NavigationView getNavigationView()
return navigationView;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
mContext = BaseActivity.this;
@Override
public void setContentView(int layoutResID)
super.setContentView(layoutResID);
initToolbar();
private void initToolbar()
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
private void setUpNav()
drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
drawerToggle = new ActionBarDrawerToggle(BaseActivity.this, drawerLayout, R.string.app_name, R.string.app_name);
drawerLayout.setDrawerListener(drawerToggle);
getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowTitleEnabled(false);
navigationView = (NavigationView) findViewById(R.id.navigation);
// Setting Navigation View Item Selected Listener to handle the item
// click of the navigation menu
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener()
public boolean onNavigationItemSelected(MenuItem menuItem)
// 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
Intent intent;
switch (menuItem.getItemId())
case R.id.xxxx:
return true;
return false;
);
// Setting the actionbarToggle to drawer layout
// calling sync state is necessay or else your hamburger icon wont show
// up
drawerToggle.syncState();
@Override
public void onPostCreate(Bundle savedInstanceState)
super.onPostCreate(savedInstanceState);
setUpNav();
drawerToggle.syncState();
@Override
public void onConfigurationChanged(Configuration newConfig)
super.onConfigurationChanged(newConfig);
drawerToggle.onConfigurationChanged(newConfig);
@Override
public boolean onCreateOptionsMenu(Menu menu)
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
@Override
public boolean onOptionsItemSelected(MenuItem item)
if (drawerToggle.onOptionsItemSelected(item))
return true;
// 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();
if (id == R.id.action_settings)
return true;
return super.onOptionsItemSelected(item);
【讨论】：
你好@Nam Trung，很好解释，但我遇到了一些问题，最后我得到了解决方案，如果有人在工具栏中遇到同样的空指针问题，你可以参考这个链接：***.com/questions/33009469/… 【参考方案2】：我使用 baseactivity 的膨胀布局和重用对 BaseActivity 类进行了一些更改，您可以使用以下类仅扩展到您的任何一个 Activity 类中。
import android.content.Context;
import android.content.res.Configuration;
import android.os.Bundle;
import android.support.design.widget.NavigationView;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.FrameLayout;
public class BaseActivity extends AppCompatActivity
public Toolbar toolbar;
public DrawerLayout drawerLayout;
public ActionBarDrawerToggle drawerToggle;
public NavigationView navigationView;
public Context mContext;
public NavigationView getNavigationView()
return navigationView;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
mContext = BaseActivity.this;
setContentView(R.layout.base_activity);
@Override
public void setContentView(int layoutResID)
DrawerLayout fullView = (DrawerLayout)getLayoutInflater().inflate(R.layout.base_activity, null);
FrameLayout activityContainer = (FrameLayout) fullView.findViewById(R.id.activity_content);
getLayoutInflater().inflate(layoutResID, activityContainer, true);
super.setContentView(fullView);
initToolbar();
private void initToolbar()
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
private void setUpNav()
drawerLayout = (DrawerLayout) findViewById(R.id.activity_container);
drawerToggle = new ActionBarDrawerToggle(BaseActivity.this, drawerLayout, R.string.app_name, R.string.app_name);
drawerLayout.setDrawerListener(drawerToggle);
getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowTitleEnabled(false);
navigationView = (NavigationView) findViewById(R.id.navigation);
// Setting Navigation View Item Selected Listener to handle the item
// click of the navigation menu
navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener()
public boolean onNavigationItemSelected(MenuItem menuItem)
// 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
Intent intent;
switch (menuItem.getItemId())
case R.id.xxxx:
return true;
return false;
);
// Setting the actionbarToggle to drawer layout
// calling sync state is necessay or else your hamburger icon wont show
// up
drawerToggle.syncState();
@Override
public void onPostCreate(Bundle savedInstanceState)
super.onPostCreate(savedInstanceState);
setUpNav();
drawerToggle.syncState();
@Override
public void onConfigurationChanged(Configuration newConfig)
super.onConfigurationChanged(newConfig);
drawerToggle.onConfigurationChanged(newConfig);
@Override
public boolean onCreateOptionsMenu(Menu menu)
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
@Override
public boolean onOptionsItemSelected(MenuItem item)
if (drawerToggle.onOptionsItemSelected(item))
return true;
// 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();
if (id == R.id.action_settings)
return true;
return super.onOptionsItemSelected(item);
这是我的 base_activity.xml，
<android.support.v4.widget.DrawerLayout
android:id="@+id/activity_container"
android:layout_
android:layout_
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_
android:layout_
android:orientation="vertical">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_
android:layout_
/>
<FrameLayout
android:id="@+id/activity_content"
android:layout_
android:layout_ />
</LinearLayout>
<android.support.design.widget.NavigationView
android:id="@+id/navigation"
android:layout_
android:layout_
android:layout_gravity="start"
/>
</android.support.v4.widget.DrawerLayout>
【讨论】：
如果任何人在访问任何视图时都会出现空指针异常，我要求使用它为我工作的所有支持库版本 23.0.0。比如，编译 'com.android.support:appcompat-v7:23.0.0' 并编译 'com.android.support:design:23.0.0'【参考方案3】：你可以参考我下面的代码，在我的基础活动中注意addContentView（这里我命名为NavigationDrawerActivity）
基础活动：
public class NavigationDrawerActivity extends AppCompatActivity
private DrawerLayout mDrawerLayout;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_navigation_drawer);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
this, mDrawerLayout, toolbar, R.string.drawer_open, R.string.drawer_close);
mDrawerLayout.setDrawerListener(toggle);
toggle.syncState();
/**
* called in extending activities instead of setContentView...
*
* @param layoutId The content Layout Id of extending activities
*/
public void addContentView(int layoutId)
LayoutInflater inflater = (LayoutInflater) this
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View contentView = inflater.inflate(layoutId, null, false);
mDrawerLayout.addView(contentView, 0);
然后在其他活动中，例如MainActivity：
public class MainActivity extends NavigationDrawerActivity
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
super.addContentView(R.layout.activity_main);
希望这会有所帮助！
【讨论】：
感谢@BNK 这对我来说非常有效，但唯一的问题是我没有看到切换图标。相反，它总是在 ActionBar 中向我显示返回图标。你知道我们该如何解决这个问题吗？ 永远不要使用这种方法【参考方案4】：您可以在您的BaseActivity 中覆盖setContentView 并在超级调用之后初始化所有内容，或者将所有DrawerLayout 相关的东西移动到protected 方法并从BaseActivity 的每个孩子调用它，在你之后致电setContentView。我认为第一个应该很简单，从您发布的内容来看，您可以避免在 BaseActivity 中覆盖 onCreate
【讨论】：
【参考方案5】： Common Navigation DraweFor All Activity
## BaseActivity.java ##
public class BaseActivity extends FragmentActivity
final String[] navDrawMenuItems = "My Project" , "My Project1", "MyProject2", "MyProject3" ,"MyProject4","MyProject5","MyProject6";
final int[] navDrawMenuIcons = R.drawable.vendor,
R.drawable.vendor,
R.drawable.vendor,
R.drawable.vendor,
R.drawable.log_icon,
R.drawable.vendor,
;
public RelativeLayout mRelativeLayout;
public FrameLayout actContent;
public ListView navList;
LinearLayout drawer_List;
TextView text_emp_name;
public MenuDrawerAdapter menuDrawerAdapter;
public ArrayList<Vendor_Wrapper> menuDrawerList = new ArrayList<>();
public DrawerArrowDrawable drawerArrowDrawable;
public ImageView drawer_indicator;
public DrawerLayout drawer_layout;
public float offset;
public boolean flipped;
SharedPreferences _SP;
SharedPreferences.Editor _EDITOR;
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
for (int i = 0; i < navDrawMenuItems.length; i++)
menuDrawerList.add(new Vendor_Wrapper(""+i,navDrawMenuItems[i], navDrawMenuIcons[0]));
@Override
public void setContentView(int layoutResID)
mRelativeLayout = (RelativeLayout) getLayoutInflater().inflate(R.layout.activity_base, null);
actContent = (FrameLayout) mRelativeLayout.findViewById(R.id.main);
// set the drawer dialog_view as main content view of Activity.
setContentView(mRelativeLayout);
// add dialog_view of BaseActivities inside framelayout.i.e. frame_container
getLayoutInflater().inflate(layoutResID, actContent, true);
drawer_layout = (DrawerLayout) findViewById(R.id.drawer_layout);
// =========================================
final Resources resources = getResources();
drawerArrowDrawable = new DrawerArrowDrawable(resources);
drawer_indicator = (ImageView) findViewById(R.id.drawer_indicator);
drawerArrowDrawable.setStrokeColor(resources.getColor(android.R.color.white));
drawer_indicator.setImageDrawable(drawerArrowDrawable);
// =========================================
text_emp_name=(TextView)findViewById(R.id.text_emp_name) ;
_SP = getSharedPreferences(Constants.pref_name, MODE_PRIVATE);
text_emp_name.setText(_SP.getString("empName",""));
drawer_List=(LinearLayout)findViewById(R.id.drawer_List);
navList = (ListView) findViewById(R.id.drawer_List1);
menuDrawerAdapter = new MenuDrawerAdapter(BaseActivity.this, menuDrawerList);
navList.setAdapter(menuDrawerAdapter);
navList.setOnItemClickListener(new AdapterView.OnItemClickListener()
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long l)
Intent intent;
// Toast.makeText(getApplicationContext(),"position "+position,30).show();
Log.i(Constants.TAG,"drawer_position: "+position);
switch (position)
case 0:
intent = new Intent(BaseActivity.this, List_of_projects.class);
startActivityForResult(intent,Constants.EXIT);
//
break;
case 1:
intent = new Intent(BaseActivity.this, List_of_projects.class);
startActivityForResult(intent,Constants.EXIT);
// drawer_indicator.performClick();
break;
case 2:
intent = new Intent(BaseActivity.this, List_of_projects.class);
startActivityForResult(intent,Constants.EXIT);
// drawer_indicator.performClick();
break;
case 3:
intent = new Intent(BaseActivity.this, List_of_projects.class);
startActivityForResult(intent,Constants.EXIT);
// drawer_indicator.performClick();
break;
case 4:
intent = new Intent(BaseActivity.this, List_of_projects.class);
intent.putExtra("Type","Complaints");
startActivityForResult(intent,Constants.EXIT);
// drawer_indicator.performClick();
break;
case 5:
intent = new Intent(BaseActivity.this, List_of_projects.class);
intent.putExtra("Type","Suggestions");
startActivityForResult(intent,Constants.EXIT);
break;
case 6:
intent = new Intent(BaseActivity.this, List_of_projects.class);
startActivityForResult(intent,Constants.EXIT);
break;
case 7:
System.out.println("Logout clickedddddd ");
SharedPreferences.Editor editor = getSharedPreferences("my_pref", MODE_PRIVATE).edit();
editor.clear();
editor.commit();
setResult(Constants.EXIT);
finish();
break;
default:
break;
);
initViewsandSharedPreferencesandSQLiteAdapter();
clickToViews();
public void setMenuDrawer(ArrayList<Vendor_Wrapper> menuDrawerList, String email)
navList = (ListView) findViewById(R.id.drawer_List1);
menuDrawerAdapter = new MenuDrawerAdapter(BaseActivity.this, menuDrawerList);
navList.setAdapter(menuDrawerAdapter);
public void initViewsandSharedPreferencesandSQLiteAdapter()
_SP = getSharedPreferences(Constants.TAG, MODE_PRIVATE);
_EDITOR = _SP.edit();
drawer_indicator_LL = (LinearLayout) findViewById(R.id.drawer_indicator_LL);
/**
* Take care of popping the fragment back stack or finishing the activity
* as appropriate.
*/
@Override
public void onBackPressed()
super.onBackPressed();
if (drawer_layout.isDrawerVisible(Gravity.RIGHT))
drawer_layout.closeDrawer(drawer_List);
else
finish();
public void clickToViews()
drawer_layout.setDrawerListener(new DrawerLayout.SimpleDrawerListener()
@Override
public void onDrawerSlide(View drawerView, float slideOffset)
offset = slideOffset;
// Sometimes slideOffset ends up so close to but not quite 1 or 0.
if (slideOffset >= .995)
flipped = true;
drawerArrowDrawable.setFlip(flipped);
else if (slideOffset <= .005)
flipped = false;
drawerArrowDrawable.setFlip(flipped);
drawerArrowDrawable.setParameter(offset);
);
drawer_indicator.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
if (drawer_layout.isDrawerVisible(Gravity.RIGHT))
drawer_layout.closeDrawer(drawer_List);
else
drawer_layout.openDrawer(drawer_List);
);
drawer_indicator_LL.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View v)
if (drawer_layout.isDrawerVisible(Gravity.RIGHT))
drawer_layout.closeDrawer(drawer_List);
else
drawer_layout.openDrawer(drawer_List);
);
public void NavigationPerformClick()
drawer_indicator.performClick();
private class MenuDrawerAdapter extends BaseAdapter
ArrayList<Vendor_Wrapper> menuDrawerList;
Context context;
public MenuDrawerAdapter(Context context, ArrayList<Vendor_Wrapper> menuDrawerList)
super();
this.context = context;
this.menuDrawerList = menuDrawerList;
@Override
public int getCount()
return menuDrawerList.size();
@Override
public Object getItem(int position)
return position;
@Override
public long getItemId(int position)
return position;
@Override
public View getView(int position, View convertView, ViewGroup parent)
LayoutInflater layoutInflater = LayoutInflater.from(BaseActivity.this);
ViewHolder viewHolder;
if (convertView == null)
viewHolder = new ViewHolder();
convertView = layoutInflater.inflate(R.layout.row_menu_drawer, null);
viewHolder.tvTitle = (TextView) convertView.findViewById(R.id.tv_title);
viewHolder.imgIcon = (ImageView) convertView.findViewById(R.id.img_icon);
viewHolder.main_RL = (RelativeLayout)convertView.findViewById(R.id.main_RL);
viewHolder.imgIcon.setVisibility(View.GONE);
convertView.setTag(viewHolder);
else
viewHolder = (ViewHolder) convertView.getTag();
Vendor_Wrapper menuDrawerModel = menuDrawerList.get(position);
//## Setup Data below
String Name = menuDrawerModel.getName();
String id = menuDrawerModel.getId();
viewHolder.tvTitle.setText(menuDrawerModel.getName());
// viewHolder.main_RL.setOnClickListener(new ClickToView(BaseActivity.this,position,id,Name));
viewHolder.imgIcon.setImageResource(menuDrawerModel.getDrawable_icon());
return convertView;
public class ViewHolder
TextView tvTitle;
ImageView imgIcon;
RelativeLayout main_RL;
protected class MenuDrawerModel
private String title;
private int icon;
public String Icon_url;
public MenuDrawerModel(String title, int icon, String icon_url)
this.title = title;
this.icon = icon;
Icon_url = icon_url;
public MenuDrawerModel(String title, int icon)
super();
this.title = title;
this.icon = icon;
public MenuDrawerModel()
super();
public String getTitle()
return title;
public void setTitle(String title)
this.title = title;
public int getIcon()
return icon;
public void setIcon(int icon)
this.icon = icon;
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
super.onActivityResult(requestCode, resultCode, data);
System.out.println("Logout onActivityResult "+resultCode);
if(resultCode==Constants.EXIT)
setResult(Constants.EXIT);
finish();
## MainActivity.java ##
public class MainActivity extends BaseActivity
@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
## activity_base.xml ##
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:custom="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_
android:layout_
android:background="@color/white">
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/drawer_layout"
android:layout_
android:layout_>
<RelativeLayout
android:layout_
android:layout_>
<include
android:id="@+id/header_view"
layout="@layout/layout_header_view"
android:layout_
android:layout_ />
<FrameLayout
android:id="@+id/main"
android:layout_
android:layout_
android:layout_below="@+id/header_view">
</FrameLayout>
</RelativeLayout>
<LinearLayout
android:id="@+id/drawer_List"
android:layout_
android:layout_
android:layout_gravity="start"
android:layout_marginTop="50dp"
android:background="@color/white"
android:choiceMode="singleChoice"
android:orientation="vertical"
android:weightSum="10">
<LinearLayout
android:layout_
android:layout_
android:layout_weight="3"
android:background="@drawable/bagroundg"
android:orientation="vertical"
android:visibility="gone"
android:weightSum="5">
</LinearLayout>
<ListView
android:id="@+id/drawer_List1"
android:layout_
android:layout_
android:layout_gravity="start"
android:background="@color/white"
android:choiceMode="singleChoice" />
</LinearLayout>
</android.support.v4.widget.DrawerLayout>
</RelativeLayout>
## activity_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"
android:layout_
android:layout_>
<LinearLayout
android:layout_
android:layout_>
<TextView
android:layout_
android:layout_
android:gravity="center"
android:text="Hello World!"
android:textSize="30dp" />
</LinearLayout>
</RelativeLayout>
public class Vendor_Wrapper
private String id;
public Vendor_Wrapper(String id, String name, int drawable_icon)
this.id = id;
Name = name;
this.drawable_icon = drawable_icon;
private String Name;
private String contact_no;
private String Email_id;
private String Address;
private String img;
private String PAY_MODE;
private String min;
private String max;
private String imgs;
private int drawable_icon;
public int getDrawable_icon()
return drawable_icon;
public void setDrawable_icon(int drawable_icon)
this.drawable_icon = drawable_icon;
public String getEmail_id()
return Email_id;
public void setEmail_id(String email_id)
Email_id = email_id;
public String getId()
return id;
public void setId(String id)
this.id = id;
public String getName()
return Name;
public void setName(String name)
Name = name;
public String getContact_no()
return contact_no;
public void setContact_no(String contact_no)
this.contact_no = contact_no;
public String getAddress()
return Address;
public void setAddress(String address)
Address = address;
public String getImg()
return img;
public void setImg(String img)
this.img = img;
public String getPAY_MODE()
return PAY_MODE;
public void setPAY_MODE(String PAY_MODE)
this.PAY_MODE = PAY_MODE;
public String getMin()
return min;
public void setMin(String min)
this.min = min;
public String getMax()
return max;
public void setMax(String max)
this.max = max;
public String getImgs()
return imgs;
public void setImgs(String imgs)
this.imgs = imgs;
public Vendor_Wrapper(String id, String name, String contact_no, String email_id, String address, String img, String PAY_MODE, String min, String max, String imgs)
this.id = id;
Name = name;
this.contact_no = contact_no;
Email_id = email_id;
Address = address;
this.img = img;
this.PAY_MODE = PAY_MODE;
this.min = min;
this.max = max;
this.imgs = imgs;
【讨论】：
这将帮助您在不添加到所有活动的情况下使用通用导航抽屉 看起来不错，很干净将调查将我当前的解决方案换成这个！ 您可以从此链接下载项目github.com/Rishisahu/BaseActivityConcept【参考方案6】：这是我实现 BaseActivity 的示例，我发现我的做法不同，它对我有用。
我的基本活动
public abstract class BaseActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener
@Override
public void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
public boolean onNavigationItemSelected(MenuItem item)
// Handle navigation view item clicks here.
int id = item.getItemId();
//swap this to a switch statement
if (id == R.id.nav_newgame)
// Start new game
Log.e("Base","new Game");
else if (id == R.id.nav_players)
else if (id == R.id.nav_history)
else if (id == R.id.nav_tools)
else if (id == R.id.nav_share)
else if (id == R.id.nav_about)
DrawerLayout drawer = findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
return true;
任何共享同一个导航抽屉的活动
public class MainActivity extends BaseActivity
NavigationView navigationView;
@Override
public void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
navigationView = findViewById(R.id.nav_view);
navigationView.setNavigationItemSelectedListener(this);
在您的基础活动中允许使用一个动态导航抽屉，从而省去了一遍又一遍地编写代码的麻烦。此外，您可以覆盖 Base Activity 的 Nav Drawer，并针对不同情况生成不同的结果。
【讨论】：
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