Toolbar

简单使用

Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                android:background="?attr/colorPrimary"
                android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
                app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
                app:layout_scrollFlags="scroll|enterAlways|snap" /> // 添加命名空间

添加action 按钮，首先定义菜单选项

public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.toolbar, menu);
return true;
}

创建menu的toolbar.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">
    <item
        android:id="@+id/backup"
        android:icon="@drawable/ic_backup"
        android:title="Backup"
        app:showAsAction="always"/> // 始终显示在toolbar上
    <item
        android:id="@+id/delete"
        android:icon="@drawable/ic_delete"
        android:title="Delete"
        app:showAsAction="ifRoom"/>// 如果空间够，就显示，否则，显示到菜单栏中
    <item
        android:id="@+id/settings"
        android:icon="@drawable/ic_settings"
        android:title="Settings"
        app:showAsAction="never"/>//显示在菜单栏里
</menu>

处理选项的点击事件

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:
                mDrawerLayout.openDrawer(GravityCompat.START);
                break;
            case R.id.backup:
                Toast.makeText(this, "You clicked Backup", Toast.LENGTH_SHORT).show();
                break;
            case R.id.delete:
                Toast.makeText(this, "You clicked Delete", Toast.LENGTH_SHORT).show();
                break;
            case R.id.settings:
                Toast.makeText(this, "You clicked Settings", Toast.LENGTH_SHORT).show();
                break;
            default:
        }
        return true;
    }

DrawerLayout

<?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"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.design.widget.CoordinatorLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="?attr/actionBarSize"
                android:background="?attr/colorPrimary"
                android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
                app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
                app:layout_scrollFlags="scroll|enterAlways|snap" />
       
       .......省略.......

    </android.support.design.widget.CoordinatorLayout>

    <android.support.design.widget.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="start"  //必选指定，
        app:headerLayout="@layout/nav_header"
        app:menu="@menu/nav_menu" />

</android.support.v4.widget.DrawerLayout>

android:layout_gravity="left"
left: 表示菜单栏在左边
right:在右边
start:会自动根据系统语言判断

toolbar 和侧滑 结合，添加导航按钮

   mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
        NavigationView navView = (NavigationView) findViewById(R.id.nav_view);
        ActionBar actionBar = getSupportActionBar();
        if (actionBar != null) {
            actionBar.setDisplayHomeAsUpEnabled(true);
            actionBar.setHomeAsUpIndicator(R.drawable.ic_menu);
        }


    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:
              // 点击打开侧滑
                mDrawerLayout.openDrawer(GravityCompat.START);

NavigationView （侧滑的菜单区域）

    <android.support.design.widget.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        app:headerLayout="@layout/nav_header"  //头部区域
        app:menu="@menu/nav_menu" />  //菜单区域

代码逻辑

        navView.setCheckedItem(R.id.nav_call); // 默认选中项
        navView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
            @Override
            public boolean onNavigationItemSelected(MenuItem item) {
                mDrawerLayout.closeDrawers(); // 关闭侧滑
                return true;
            }
        });

FloatingActionButton

        <android.support.design.widget.FloatingActionButton
            android:id="@+id/fab"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="bottom|end" // 在屏幕的位置
            android:layout_margin="16dp"
            android:elevation="8dp"  投影
            android:src="@drawable/ic_done" />

CardView

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