compile 'com.android.support:appcompat-v7:25.3.1'

<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
 <!-- Toolbar的颜色 -->
 <item name="colorPrimary">@color/colorPrimary</item>
 <!-- 通知栏的颜色 -->
 <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
 <!-- 悬浮图标等颜色，更多的表达了一种强调的意思，比如一些控件的选中状态也会使用该颜色 -->
 <item name="colorAccent">@color/colorAccent</item>
</style>

<android.support.design.widget.AppBarLayout
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
 
 <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"/>
  
</android.support.design.widget.AppBarLayout>

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

<android.support.design.widget.AppBarLayout
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
 <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"/>
</android.support.design.widget.AppBarLayout>

<android.support.v7.widget.RecyclerView
 android:id="@+id/recycler_view"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 app:layout_behavior="@string/appbar_scrolling_view_behavior"/>

compile 'com.android.support:design:25.3.1'

<android.support.design.widget.FloatingActionButton
 android:id="@+id/fab"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_gravity="bottom|end"
 android:layout_margin="16dp"
 android:src="@drawable/ic_circle"/>

Snackbar.make(view, "This is Snackbar.", Snackbar.LENGTH_SHORT)
  // 设置动作
  .setAction("ok", new View.OnClickListener() {
   @Override
   public void onClick(View view) {
    Toast.makeText(context, "onClick", Toast.LENGTH_SHORT);
   }
  }).show();

<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"/>
 <android.support.design.widget.FloatingActionButton
  android:id="@+id/fab"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_gravity="bottom|end"
  android:layout_margin="16dp"
  android:src="@drawable/ic_circle"/>
</android.support.design.widget.CoordinatorLayout>

compile 'com.android.support:cardview-v7:25.3.1'

<android.support.v7.widget.CardView
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 app:cardCornerRadius = "10dp"
 app:elevation="5dp"
 app:cardBackgroundColor="#71C3DE">

 <TextView
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:layout_gravity="center"
  android:layout_margin="20dp"
  android:text="CardView控件，可以设置阴影和圆角效果"/>

</android.support.v7.widget.CardView>

public class MainActivity extends AppCompatActivity {
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
   Window window = getWindow();
   window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS
     | WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
   window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
     | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
     | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
   window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
   window.setStatusBarColor(Color.TRANSPARENT);
   window.setNavigationBarColor(Color.TRANSPARENT);
  }
  setContentView(R.layout.activity_main);
 }
}

new android.support.v7.app.AlertDialog.Builder(context)
  .setTitle("AlertDialog")
  .setMessage("Something important.")
  .setCancelable(false) //设置点击Dialog以外的界面不消失，按返回键也不起作用
  .setPositiveButton("OK", new android.content.DialogInterface.OnClickListener() {
   @Override
   public void onClick(android.content.DialogInterface dialogInterface, int i) {
   }
  })
  .setNegativeButton("Cancel", null)
  .show();

ProgressDialog progressDialog = new ProgressDialog(context);
progressDialog.setTitle("ProgressDialog");
progressDialog.setMessage("Loading..");
progressDialog.setCancelable(true);
progressDialog.show();