可折叠的ToolBar+抽屉菜单NavigationView+浮动按钮FloatButton

   <h2>使用Material Design风格的ToolBar和抽屉导航</h2>    <p>先看个简单的运行效果</p>    <p style="text-align:center"><img src="https://simg.open-open.com/show/735eaecc03e4521f6eedde3cc6f692fa.gif"></p>    <p style="text-align:center">run</p>    <h2>主要记录下布局的写法</h2>    <h3>1 用到的Google Design依赖和V7包依赖</h3>    <pre>  <code class="language-java">compile 'com.android.support:cardview-v7:25.0.0'  compile 'com.android.support:recyclerview-v7:25.0.0'  compile 'com.android.support:design:25.0.0'  compile 'com.android.support:appcompat-v7:25.0.0'</code></pre>    <h3>2 主布局结构</h3>    <p style="text-align:center"><img src="https://simg.open-open.com/show/74a50ca10a00fcd0eb54a46b5e2dff32.png"></p>    <p style="text-align:center">主布局结构</p>    <h3>3 主布局内容</h3>    <pre>  <code class="language-java"><android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"      xmlns:app="http://schemas.android.com/apk/res-auto"      android:id="@+id/drawer_main"      android:layout_width="match_parent"      android:layout_height="match_parent">        <FrameLayout          android:layout_width="match_parent"          android:layout_height="match_parent">            <!--CoordinatorLayout 布局属性:FrameLayout-->          <android.support.design.widget.CoordinatorLayout              android:layout_width="match_parent"              android:layout_height="match_parent">                <!--AppBar  布局属性:LinearLayout 默认子元素垂直排列-->              <android.support.design.widget.AppBarLayout                  android:id="@+id/appbar"                  android:layout_width="match_parent"                  android:layout_height="200dp"                  android:fitsSystemWindows="true">                    <!--提供了一个可以折叠的Toolbar 布局属性:FrameLayout-->                  <android.support.design.widget.CollapsingToolbarLayout                      android:layout_width="match_parent"                      android:layout_height="match_parent"                      app:layout_scrollFlags="scroll|exitUntilCollapsed">                        <View                          android:layout_width="match_parent"                          android:layout_height="match_parent"                          android:background="@color/colorPrimary"                          app:layout_collapseMode="parallax"                          app:layout_collapseParallaxMultiplier="0.5" />                        <android.support.v7.widget.Toolbar                          android:id="@+id/toolbar"                          android:layout_width="match_parent"                          android:layout_height="?android:attr/actionBarSize"                          app:contentInsetStart="0dp"                          app:layout_collapseMode="pin"                          app:title="@string/app_name" />                    </android.support.design.widget.CollapsingToolbarLayout>                </android.support.design.widget.AppBarLayout>                <android.support.v7.widget.RecyclerView                  android:id="@+id/recycler"                  android:layout_width="match_parent"                  android:layout_height="wrap_content"                  android:background="@color/divider"                  app:layout_behavior="@string/appbar_scrolling_view_behavior" />            </android.support.design.widget.CoordinatorLayout>            <!--Float Button-->          <android.support.design.widget.FloatingActionButton              android:id="@+id/float_btn"              android:layout_width="wrap_content"              android:layout_height="wrap_content"              android:layout_gravity="bottom|end"              android:layout_marginBottom="10dp"              android:layout_marginEnd="10dp"              android:src="@drawable/ic_action_important"              app:elevation="10dp" />        </FrameLayout>        <!--左侧抽屉-->      <android.support.design.widget.NavigationView          android:id="@+id/navigation"          android:layout_width="wrap_content"          android:layout_height="match_parent"          android:layout_gravity="start"          app:headerLayout="@layout/layout_navigation_header_main"          app:menu="@menu/main_navigation">        </android.support.design.widget.NavigationView>  </android.support.v4.widget.DrawerLayout></code></pre>    <h3>4 抽屉导航头布局内容 (layout_navigation_header_main.xml)</h3>    <pre>  <code class="language-java"><FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"      android:layout_width="match_parent"      android:layout_height="200dp"      android:background="@color/colorAccent">        <TextView          android:layout_width="wrap_content"          android:layout_height="wrap_content"          android:layout_gravity="center"          android:drawablePadding="5dp"          android:drawableStart="@mipmap/ic_launcher"          android:gravity="center"          android:text="@string/hello"          android:textColor="@color/icons"          android:textSize="20sp" />  </FrameLayout></code></pre>    <h3>5 界面逻辑很简单，给RecyclerView绑定数据，抽屉菜单的打开关闭(MainActivity内容)</h3>    <pre>  <code class="language-java">public class MainActivity extends AppCompatActivity {      private final String[] data = {"Hello,Word!",               "Hello,Android!", "Hello,Material design!",              "Hello,Word!", "Hello,Android!", "Hello,Material design!",              "Hello,Word!", "Hello,Android!", "Hello,Material design!",              "Hello,Word!", "Hello,Android!", "Hello,Material design!",              "Hello,Word!", "Hello,Android!", "Hello,Material design!"};        private FloatingActionButton floatBtn;      private DrawerLayout drawerLayout;        @Override      protected void onCreate(final Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.activity_main);          Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);          //设置ToolBar作为ActionBar          setSupportActionBar(toolbar);          ActionBar actionBar = getSupportActionBar();          if (actionBar != null) {              //设置ActionBar左上角按钮              actionBar.setHomeAsUpIndicator(R.drawable.ic_nav);              actionBar.setDisplayHomeAsUpEnabled(true);          }          drawerLayout = (DrawerLayout) findViewById(R.id.drawer_main);          floatBtn = (FloatingActionButton) findViewById(R.id.float_btn);          floatBtn.setOnClickListener(new View.OnClickListener() {              @Override              public void onClick(View view) {                  Toast.makeText(MainActivity.this, "Float Button", Toast.LENGTH_SHORT).show();              }          });            RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recycler);          MyAdapter myAdapter = new MyAdapter();          recyclerView.setAdapter(myAdapter);          recyclerView.setLayoutManager(new LinearLayoutManager(this));      }        @Override      public boolean onCreateOptionsMenu(Menu menu) {          MenuInflater menuInflater = getMenuInflater();          menuInflater.inflate(R.menu.main_menu, menu);          return super.onCreateOptionsMenu(menu);      }        @Override      public boolean onOptionsItemSelected(MenuItem item) {          switch (item.getItemId()) {              case android.R.id.home:                  if (drawerLayout.isDrawerOpen(GravityCompat.START)) {                      drawerLayout.closeDrawers();                  } else {                      drawerLayout.openDrawer(GravityCompat.START);                  }                  break;              case R.id.menu_1:                  Toast.makeText(MainActivity.this, item.getTitle(), Toast.LENGTH_SHORT).show();                  break;          }          return super.onOptionsItemSelected(item);      }        private class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {            class ViewHolder extends RecyclerView.ViewHolder {              private TextView tv;                ViewHolder(View itemView) {                  super(itemView);                  tv = (TextView) itemView.findViewById(R.id.tv);              }            }            @Override          public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {              View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_list, parent, false);              return new ViewHolder(view);          }            @Override          public void onBindViewHolder(ViewHolder holder, int position) {              holder.tv.setText(data[holder.getAdapterPosition()]);          }            @Override          public int getItemCount() {              return data.length;          }      }  }</code></pre>    <h3>6 总结</h3>    <ol>     <li>Google提供的抽屉菜单(NavigationView)确实方便了许多，可以直接通过设置Menu资源作为抽屉菜单的菜单项，可以直接设置layout作为抽屉菜单的头部</li>     <li>可折叠的ToolBar<br> ( CoordinatorLayout + AppBarLayout + CollapsingToolbarLayout + Toolbar )使嵌套滚动的实现变得容易</li>     <li>浮动按钮( <strong>FloatActionButton</strong> )也是方便了实现material design风格</li>    </ol>    <p> </p>    <p>来自：http://www.jianshu.com/p/eef5878a7627</p>    <p> </p>