I have an app in which I added the Navigation Drawer by looking at the example android studio gives you. But now I want to add the drawer to other activities. To try to do this, I made an new project with the Navigation Drawer Activity that Android Studio gives you. I found that the easiest way to achieve this is to make a BaseActivity and extends all my other activities that need a Navigation Drawer from the BaseActivity Here is some of my code.
我有一个应用程序,我通过查看Android工作室为您提供的示例添加了导航抽屉。但现在我想将抽屉添加到其他活动中。为了尝试这样做,我使用Android Studio为您提供的导航抽屉活动创建了一个新项目。我发现实现这一目标的最简单方法是创建一个BaseActivity,并从BaseActivity扩展我需要导航抽屉的所有其他活动。这是我的一些代码。
BaseActivity.java
package com.example.eddie.drawerapp2;
//I did not include the imports to make this shorter
public class BaseActivity extends AppCompatActivity implements
NavigationView.OnNavigationItemSelectedListener
{
protected FrameLayout frameLayout;
private DrawerLayout drawer;
private NavigationView navView;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.base_activity);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
android.support.v7.app.ActionBarDrawerToggle toggle = new android.support.v7.app.ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
frameLayout = (FrameLayout)findViewById(R.id.content_frame);
drawer = (DrawerLayout)findViewById(R.id.drawer_layout);
navView = (NavigationView)findViewById(R.id.nav_view);
navView.setNavigationItemSelectedListener(this);
}
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
// Handle the camera action
} else if (id == R.id.nav_gallery) {
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
activity_base.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">
<FrameLayout
android:id="@+id/content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<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>
When I go to activity_base.xml and change it to design view it looks fine.
当我转到activity_base.xml并将其更改为设计视图时,它看起来很好。
MainActivity.java
package com.example.eddie.drawerapp2;
//skip imports
public class MainActivity extends BaseActivity{
private DrawerLayout drawer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
LayoutInflater inflater = (LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
//inflate your activity layout here!
drawer = (findViewById(R.id.drawer_layout));
View contentView = inflater.inflate(R.layout.activity_main, null, false);
drawer.addView(contentView, 0);
}
}
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">
<include
layout="@layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<FrameLayout
android:id="@+id/content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</android.support.v4.widget.DrawerLayout>
app_bar_main.xml
<?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"
tools:context="com.example.eddie.drawerapp2.MainActivity">
<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>
<include layout="@layout/content_main" />
</android.support.design.widget.CoordinatorLayout>
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.eddie.drawerapp2.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>
activity_main.xml and MainActivity.java have logic error. It just displays the content, and a blank tool bar. Swiping to open the NavigationDrawer doesn't do anything either. I really do not know what to do, this was just my attempt. Please help me, I am really stuck. What do I need to do to add the NavigationDrawer to the MainActivity and than other activities?
activity_main.xml和MainActivity.java有逻辑错误。它只显示内容和空白工具栏。滑动以打开NavigationDrawer也不会执行任何操作。我真的不知道该怎么做,这只是我的尝试。请帮帮我,我真的被卡住了。将NavigationDrawer添加到MainActivity和其他活动需要做什么?
1 个解决方案
#1
1
I have done this before, I think what you lack in your code for BaseActivity.java is overiding the setContentView methods so that content view can be set into the framelayout creating the behaviour of other activity implement this like subclasses.
我之前已经这样做了,我认为您在BaseActivity.java的代码中缺少的是覆盖setContentView方法,以便可以将内容视图设置到framelayout中,从而创建其他活动的行为,实现此类子类。
1. BaseActivity.java
package com.example.eddie.drawerapp2;
//I did not include the imports to make this shorter
public class BaseActivity extends AppCompatActivity implements
NavigationView.OnNavigationItemSelectedListener
{
protected FrameLayout frameLayout;
private DrawerLayout drawer;
private NavigationView navView;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.base_activity);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
android.support.v7.app.ActionBarDrawerToggle toggle = new android.support.v7.app.ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
frameLayout = (FrameLayout)findViewById(R.id.content_frame);
drawer = (DrawerLayout)findViewById(R.id.drawer_layout);
navView = (NavigationView)findViewById(R.id.nav_view);
navView.setNavigationItemSelectedListener(this);
}
/* Overriding all setContentView methods to put the content view to the FrameLayout frameLayout
* so that, we can make other activity implementations looks like normal activity subclasses.
*/
@Override
public void setContentView(int layoutResID) {
if (frameLayout != null) {
LayoutInflater inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.MATCH_PARENT);
View stubView = inflater.inflate(layoutResID, frameLayout, false);
frameLayout.addView(stubView, lp);
}
}
@Override
public void setContentView(View view) {
if (frameLayout != null) {
ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.MATCH_PARENT);
frameLayout.addView(view, lp);
}
}
@Override
public void setContentView(View view, ViewGroup.LayoutParams params) {
if (frameLayout != null) {
frameLayout.addView(view, params);
}
}
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
// Handle the camera action
} else if (id == R.id.nav_gallery) {
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
-
Your MainActivity.java should something look like this MainActivity.java
您的MainActivity.java应该看起来像这个MainActivity.java
package com.example.eddie.drawerapp2; //skip imports public class MainActivity extends BaseActivity{ private DrawerLayout drawer; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } }
3. 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"
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">
<include
layout="@layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>
#1
1
I have done this before, I think what you lack in your code for BaseActivity.java is overiding the setContentView methods so that content view can be set into the framelayout creating the behaviour of other activity implement this like subclasses.
我之前已经这样做了,我认为您在BaseActivity.java的代码中缺少的是覆盖setContentView方法,以便可以将内容视图设置到framelayout中,从而创建其他活动的行为,实现此类子类。
1. BaseActivity.java
package com.example.eddie.drawerapp2;
//I did not include the imports to make this shorter
public class BaseActivity extends AppCompatActivity implements
NavigationView.OnNavigationItemSelectedListener
{
protected FrameLayout frameLayout;
private DrawerLayout drawer;
private NavigationView navView;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.base_activity);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
android.support.v7.app.ActionBarDrawerToggle toggle = new android.support.v7.app.ActionBarDrawerToggle(
this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
drawer.addDrawerListener(toggle);
toggle.syncState();
frameLayout = (FrameLayout)findViewById(R.id.content_frame);
drawer = (DrawerLayout)findViewById(R.id.drawer_layout);
navView = (NavigationView)findViewById(R.id.nav_view);
navView.setNavigationItemSelectedListener(this);
}
/* Overriding all setContentView methods to put the content view to the FrameLayout frameLayout
* so that, we can make other activity implementations looks like normal activity subclasses.
*/
@Override
public void setContentView(int layoutResID) {
if (frameLayout != null) {
LayoutInflater inflater = (LayoutInflater) getSystemService(LAYOUT_INFLATER_SERVICE);
ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.MATCH_PARENT);
View stubView = inflater.inflate(layoutResID, frameLayout, false);
frameLayout.addView(stubView, lp);
}
}
@Override
public void setContentView(View view) {
if (frameLayout != null) {
ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.MATCH_PARENT);
frameLayout.addView(view, lp);
}
}
@Override
public void setContentView(View view, ViewGroup.LayoutParams params) {
if (frameLayout != null) {
frameLayout.addView(view, params);
}
}
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
// Handle navigation view item clicks here.
int id = item.getItemId();
if (id == R.id.nav_camera) {
// Handle the camera action
} else if (id == R.id.nav_gallery) {
} else if (id == R.id.nav_slideshow) {
} else if (id == R.id.nav_manage) {
} else if (id == R.id.nav_share) {
} else if (id == R.id.nav_send) {
}
drawer.closeDrawer(GravityCompat.START);
return true;
}
}
-
Your MainActivity.java should something look like this MainActivity.java
您的MainActivity.java应该看起来像这个MainActivity.java
package com.example.eddie.drawerapp2; //skip imports public class MainActivity extends BaseActivity{ private DrawerLayout drawer; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } }
3. 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"
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">
<include
layout="@layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>