赞
踩
本节给大家带来基础UI控件部分的最后一个控件:DrawerLayout,官方给我们提供的一个侧滑菜单
控件,和上一节的ViewPager一样,3.0以后引入,低版本使用它,需要v4兼容包,说到侧滑,相信
很多人都用过github上的SlidingMenu,不过好像有两个版本,一个是单独的,另一个需要依赖另一
个开源项目:ActionBarSherlock;既然Google为我们提供了这个控件,为何不用咧,而且在
Material Design设计规范中,随处可见的很多侧滑菜单的动画效果,大都可以通过Toolbar +
DrawerLayout来实现~,本节我们就来探究下这个DrawerLayout的一个基本用法~还有人喜欢把他
称为抽屉控件~官方文档:DrawerLayout
- 1.主内容视图一定要是DrawerLayout的第一个子视图
- 2.主内容视图宽度和高度需要match_parent
- 3.必须显示指定侧滑视图的android:layout_gravity属性
android:layout_gravity = “start”时,从左向右滑出菜单
android:layout_gravity = “end”时,从右向左滑出菜单
不推荐使用left和right!!!- 侧滑视图的宽度以dp为单位,不建议超过320dp(为了总能看到一些主内容视图)
- 设置侧滑事件:mDrawerLayout.setDrawerListener(DrawerLayout.DrawerListener);
- 要说一点:可以结合Actionbar使用当用户点击Actionbar上的应用图标,弹出侧滑菜单!
这里就要通过ActionBarDrawerToggle,它是DrawerLayout.DrawerListener的具体实现类,
我们可以重写ActionBarDrawerToggle的onDrawerOpened()和onDrawerClosed()以监听抽屉拉出
或隐藏事件!但是这里我们不讲,因为5.0后我们使用的是Toolbar!有兴趣的可以自行查阅相关
文档!
运行效果图:
实现关键代码:
首先是我们的主布局,注意:最外层要是DrawerLayout哦!!!!
activity_main.xml:
- <android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:id="@+id/drawer_layout"
- android:layout_width="match_parent"
- android:layout_height="match_parent">
-
- <FrameLayout
- android:id="@+id/ly_content"
- android:layout_width="match_parent"
- android:layout_height="match_parent" />
-
- <ListView
- android:id="@+id/list_left_drawer"
- android:layout_width="180dp"
- android:layout_height="match_parent"
- android:layout_gravity="start"
- android:background="#080808"
- android:choiceMode="singleChoice"
- android:divider="#FFFFFF"
- android:dividerHeight="1dp" />
-
- </android.support.v4.widget.DrawerLayout>
接着ListView的布局代码和domain类:Item比较简单,就不给出了,直接上中间Fragment的
布局以及代码吧!另外Adapter直接复用我们之前写的那个可复用的MyAdapter!
fg_content.xml:
- <?xml version="1.0" encoding="utf-8"?>
- <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:orientation="vertical">
-
- <TextView
- android:id="@+id/tv_content"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_centerInParent="true"
- android:textSize="25sp" />
-
- </RelativeLayout>
ContentFragment.java:
- /**
- * Created by Jay on 2015/10/8 0008.
- */
- public class ContentFragment extends Fragment {
-
- private TextView tv_content;
-
- @Override
- public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
- View view = inflater.inflate(R.layout.fg_content, container, false);
- tv_content = (TextView) view.findViewById(R.id.tv_content);
- String text = getArguments().getString("text");
- tv_content.setText(text);
- return view;
- }
- }
最后是我们的Activity类
MainActivity.java:
- public class MainActivity extends AppCompatActivity implements AdapterView.OnItemClickListener{
-
- private DrawerLayout drawer_layout;
- private ListView list_left_drawer;
- private ArrayList<Item> menuLists;
- private MyAdapter<Item> myAdapter = null;
-
-
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
-
- drawer_layout = (DrawerLayout) findViewById(R.id.drawer_layout);
- list_left_drawer = (ListView) findViewById(R.id.list_left_drawer);
-
- menuLists = new ArrayList<Item>();
- menuLists.add(new Item(R.mipmap.iv_menu_realtime,"实时信息"));
- menuLists.add(new Item(R.mipmap.iv_menu_alert,"提醒通知"));
- menuLists.add(new Item(R.mipmap.iv_menu_trace,"活动路线"));
- menuLists.add(new Item(R.mipmap.iv_menu_settings,"相关设置"));
- myAdapter = new MyAdapter<Item>(menuLists,R.layout.item_list) {
- @Override
- public void bindView(ViewHolder holder, Item obj) {
- holder.setImageResource(R.id.img_icon,obj.getIconId());
- holder.setText(R.id.txt_content, obj.getIconName());
- }
- };
- list_left_drawer.setAdapter(myAdapter);
- list_left_drawer.setOnItemClickListener(this);
- }
-
-
- @Override
- public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
- ContentFragment contentFragment = new ContentFragment();
- Bundle args = new Bundle();
- args.putString("text", menuLists.get(position).getIconName());
- contentFragment.setArguments(args);
- FragmentManager fm = getSupportFragmentManager();
- fm.beginTransaction().replace(R.id.ly_content,contentFragment).commit();
- drawer_layout.closeDrawer(list_left_drawer);
- }
- }
代码很简单,就不多说了~
嗯,不知道你有没有发现,从上面的DrawerLayout的布局,我们大概可以猜到,DrawerLayout
最多由三个部分组成,中间的内容部分,左边的侧滑菜单部分,右边的侧滑菜单部分组成!
下面我们来写一个带有两个侧滑菜单的示例!
运行效果图:
代码实现:
————首先我们创建两个Fragment以及对应的布局,他们分别是左右侧滑菜单!
左边Fragment:
布局:fg_left.xml,这里就用了一个图片而以,点击后弹出一个新的Activity;
当然你可以根据自己的需求进行扩展!
- <?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">
-
- <ImageView
- android:id="@+id/img_bg"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:background="@mipmap/bg_menu_left"/>
-
- </LinearLayout>
对应的LeftFragment.java:
- /**
- * Created by Jay on 2015/10/9 0009.
- */
- public class LeftFragment extends Fragment{
-
- private DrawerLayout drawer_layout;
-
- @Override
- public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
- View view = inflater.inflate(R.layout.fg_left, container, false);
- ImageView img_bg = (ImageView) view.findViewById(R.id.img_bg);
- img_bg.setOnClickListener(new View.OnClickListener() {
- @Override
- public void onClick(View v) {
- getActivity().startActivity(new Intent(getActivity(),OtherActivity.class));
- drawer_layout.closeDrawer(Gravity.START);
- }
- });
- return view;
- }
-
- //暴露给Activity,用于传入DrawerLayout,因为点击后想关掉DrawerLayout
- public void setDrawerLayout(DrawerLayout drawer_layout){
- this.drawer_layout = drawer_layout;
- }
- }
右面的Fragment:
布局就三个按钮,点击后替换中间部分的Fragment,布局fg_right.xml代码如下:
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:background="#2F9AF2"
- android:gravity="center"
- android:orientation="vertical">
-
- <Button
- android:id="@+id/btn_one"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="菜单项一" />
-
- <Button
- android:id="@+id/btn_two"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="菜单项二" />
-
- <Button
- android:id="@+id/btn_three"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:text="菜单项三" />
-
- </LinearLayout>
然后对应的是RightFragment.java:
- /**
- * Created by Jay on 2015/10/9 0009.
- */
- public class RightFragment extends Fragment implements View.OnClickListener{
-
- private DrawerLayout drawer_layout;
- private FragmentManager fManager;
-
- @Override
- public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
- View view = inflater.inflate(R.layout.fg_right, container, false);
- view.findViewById(R.id.btn_one).setOnClickListener(this);
- view.findViewById(R.id.btn_two).setOnClickListener(this);
- view.findViewById(R.id.btn_three).setOnClickListener(this);
- fManager = getActivity().getSupportFragmentManager();
- return view;
- }
-
- @Override
- public void onClick(View v) {
- switch (v.getId()){
- case R.id.btn_one:
- ContentFragment cFragment1 = new ContentFragment("1.点击了右侧菜单项一",R.color.blue);
- fManager.beginTransaction().replace(R.id.fly_content,cFragment1).commit();
- drawer_layout.closeDrawer(Gravity.END);
- break;
- case R.id.btn_two:
- ContentFragment cFragment2 = new ContentFragment("2.点击了右侧菜单项二",R.color.red);
- fManager.beginTransaction().replace(R.id.fly_content,cFragment2).commit();
- drawer_layout.closeDrawer(Gravity.END);
- break;
- case R.id.btn_three:
- ContentFragment cFragment3 = new ContentFragment("3.点击了右侧菜单项三",R.color.yellow);
- fManager.beginTransaction().replace(R.id.fly_content,cFragment3).commit();
- drawer_layout.closeDrawer(Gravity.END);
- break;
- }
- }
-
- public void setDrawerLayout(DrawerLayout drawer_layout){
- this.drawer_layout = drawer_layout;
- }
-
- }
另外还有一个中间部分填充的ContentFragment,布局:fg_content.xml如下:
- <?xml version="1.0" encoding="utf-8"?>
- <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:orientation="vertical">
-
- <TextView
- android:id="@+id/tv_content"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_centerInParent="true"
- android:textSize="25sp" />
-
- </RelativeLayout>
ContentFragment.java:
- public class ContentFragment extends Fragment {
-
- private TextView tv_content;
- private String strContent;
- private int bgColor;
-
- public ContentFragment(String strContent,int bgColor) {
- this.strContent = strContent;
- this.bgColor = bgColor;
- }
-
- @Override
- public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
- View view = inflater.inflate(R.layout.fg_content, container, false);
- view.setBackgroundColor(getResources().getColor(bgColor));
- tv_content = (TextView) view.findViewById(R.id.tv_content);
- tv_content.setText(strContent);
- return view;
- }
- }
————编写好以后,就到我们的Activity的布局了以及Activity的代码了:
在此之前我们还需要些一个顶部条形栏的布局:
view_topbar.xml:
- <?xml version="1.0" encoding="utf-8"?>
- <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="match_parent"
- android:layout_height="wrap_content"
- android:background="#DCDEDB">
-
- <Button
- android:id="@+id/btn_right"
- android:layout_width="40dp"
- android:layout_height="40dp"
- android:layout_centerVertical="true"
- android:layout_alignParentRight="true"
- android:background="@drawable/btn_selctor"/>
-
- </RelativeLayout>
然后是activity_main.xml:
- <android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
- xmlns:tools="http://schemas.android.com/tools"
- android:id="@+id/drawer_layout"
- android:layout_width="match_parent"
- android:layout_height="match_parent">
-
- <LinearLayout
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:orientation="vertical">
-
- <include
- android:id="@+id/topbar"
- layout="@layout/view_topbar"
- android:layout_width="wrap_content"
- android:layout_height="48dp" />
-
- <FrameLayout
- android:id="@+id/fly_content"
- android:layout_width="match_parent"
- android:layout_height="match_parent" />
-
- </LinearLayout>
-
- <fragment
- android:id="@+id/fg_left_menu"
- android:name="jay.com.drawerlayoutdemo2.LeftFragment"
- android:layout_width="300dp"
- android:layout_height="match_parent"
- android:layout_gravity="start"
- android:tag="LEFT"
- tools:layout="@layout/fg_left" />
-
- <fragment
- android:id="@+id/fg_right_menu"
- android:name="jay.com.drawerlayoutdemo2.RightFragment"
- android:layout_width="100dp"
- android:layout_height="match_parent"
- android:layout_gravity="end"
- android:tag="RIGHT"
- tools:layout="@layout/fg_right" />
-
- </android.support.v4.widget.DrawerLayout>
最后是MainActivity.java:
- public class MainActivity extends AppCompatActivity implements View.OnClickListener {
-
- private DrawerLayout drawer_layout;
- private FrameLayout fly_content;
- private View topbar;
- private Button btn_right;
- private RightFragment fg_right_menu;
- private LeftFragment fg_left_menu;
- private FragmentManager fManager;
-
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
- fManager = getSupportFragmentManager();
- fg_right_menu = (RightFragment) fManager.findFragmentById(R.id.fg_right_menu);
- fg_left_menu = (LeftFragment) fManager.findFragmentById(R.id.fg_left_menu);
- initViews();
- }
-
- private void initViews() {
- drawer_layout = (DrawerLayout) findViewById(R.id.drawer_layout);
- fly_content = (FrameLayout) findViewById(R.id.fly_content);
- topbar = findViewById(R.id.topbar);
- btn_right = (Button) topbar.findViewById(R.id.btn_right);
- btn_right.setOnClickListener(this);
-
- //设置右面的侧滑菜单只能通过编程来打开
- drawer_layout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED,
- Gravity.END);
-
- drawer_layout.setDrawerListener(new DrawerLayout.DrawerListener() {
- @Override
- public void onDrawerSlide(View view, float v) {
-
- }
-
- @Override
- public void onDrawerOpened(View view) {
-
- }
-
- @Override
- public void onDrawerClosed(View view) {
- drawer_layout.setDrawerLockMode(
- DrawerLayout.LOCK_MODE_LOCKED_CLOSED, Gravity.END);
- }
-
- @Override
- public void onDrawerStateChanged(int i) {
-
- }
- });
-
- fg_right_menu.setDrawerLayout(drawer_layout);
- fg_left_menu.setDrawerLayout(drawer_layout);
- }
-
- @Override
- public void onClick(View v) {
- drawer_layout.openDrawer(Gravity.RIGHT);
- drawer_layout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED,
- Gravity.END); //解除锁定
- }
- }
好的,至此就大功告成了~,呼呼,下面说下看代码时可能会有的疑惑:
- 1. drawer_layout.openDrawer(Gravity.END);
这句是设置打开的哪个菜单START代表左边,END代表右边- 2. drawer_layout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED,Gravity.END);
锁定右面的侧滑菜单,不能通过手势关闭或者打开,只能通过代码打开!即调用openDrawer方法!
接着 drawer_layout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED,Gravity.END);
解除锁定状态,即可以通过手势关闭侧滑菜单
最后在drawer关闭的时候调用:
drawer_layout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED, Gravity.END);
再次锁定右边的侧滑菜单!- 3. 布局代码中的Tag属性的作用?
答:这里没用到,在重写DrawerListener的onDrawerSlide方法时,我们可以通过他的第一个
参数drawerView,调用drawerView.getTag().equals(“START”)判断触发菜单事件的是哪个
菜单!然后可以进行对应的操作!
Copyright © 2003-2013 www.wpsshop.cn 版权所有,并保留所有权利。