Based on CoordinatorLayout, roll up the navigation bar ToolBar, roll down the navigation bar, and roll out the coordinatorlayout

Based on CoordinatorLayout, roll up the navigation bar ToolBar, roll down the navigation bar, and roll out the coordinatorlayout

 

 

Activity_main.xml:

1 <android. support. design. widget. coordinatorLayout xmlns: android = "http://schemas.android.com/apk/res/android" 2 xmlns: tools = "http://schemas.android.com/tools" 3 xmlns: app = "http://schemas.android.com/apk/res-auto" 4 android: id = "@ + id/main_content" 5 android: layout_width = "match_parent" 6 android: layout_height = "match_parent" 7 android: fitsSystemWindows = "true"> 8 9 <android. support. design. widget. appBar Layout10 android: id = "@ + id/appbar" 11 android: layout_width = "match_parent" 12 android: layout_height = "wrap_content"> 13 14 <! -- App: layout_scrollFlags = "scroll | enterAlways" --> 15 <! -- Role of this sentence: the Toolbar disappears when sliding up, And the ToolBar appears immediately when sliding down --> 16 <! -- If there is no scroll, sliding up the Toolbar will not disappear --> 17 <! -- If there is no enterAlways, sliding down the Toolbar will not appear immediately and there will be a short delay --> 18 19 20 <! -- Android: minHeight = "? Attr/actionBarSize "(for this purpose by default) sets the NavigationIcon location of the Toolbar --> 21 22 <android. support. v7.widget. toolbar23 android: id = "@ + id/toolBar" 24 android: layout_width = "match_parent" 25 android: layout_height = "wrap_content" 26 app: layout_scrollFlags = "scroll | enterAlways" 27 android: background = "#9C27B0" 28 android: minHeight = "? Attr/actionBarSize "> 29 30 <TextView31 android: layout_width =" wrap_content "32 android: layout_height =" wrap_content "33 android: text =" you can add multiple views, the title bar "34 android: textColor =" # E91E63 "/> 35 </android. support. v7.widget. toolbar> 36 37 <android. support. design. widget. tabLayout38 android: id = "@ + id/tabLayout" 39 android: layout_width = "match_parent" 40 android: layout_height = "wrap_content" 41 android: background = "# e0e0 E0 "42 app: tabIndicatorColor =" # ef5350 "43 app: tabSelectedTextColor =" #1976d2 "44 app: tabTextColor =" #90caf9 "/> 45 </android. support. design. widget. appBarLayout> 46 47 <! -- App: layout_behavior = "@ string/appbar_scrolling_view_behavior" is used to prevent the above two data from being overwritten by AppBarLayout --> 48 49 <android. support. v7.widget. recyclerView50 android: id = "@ + id/recyclerView" 51 android: layout_width = "match_parent" 52 android: layout_height = "match_parent" 53 app: layout_behavior = "@ string/appbar_scrolling_view_behavior"/> 54 <android. support. design. widget. floatingActionButton56 android: layout_width = "wrap_content" 57 android: layout_height = "wrap_content" 58 android: layout_gravity = "right | bottom" 59 android: layout_marginBottom = "10dip" 60 android: layout_marginRight = "10dip" 61 android: src = "@ drawable/ic_launcher" 62 app: backgroundTint = "# e57373" 63 app: borderWidth = "10dp" 64 app: elevation = "10dip" 65 app: fabSize = "normal" 66 app: pressedTranslationZ = "10dp" 67 app: rippleColor = "# c62828"/> 68 69 </android. support. design. widget. coordinatorLayout>

 

MainActivity. java:

1 package com. example. testappbarlayout_zzw; 2 3 4 import android. app. activity; 5 import android. content. context; 6 import android. OS. bundle; 7 import android. support. design. widget. tabLayout; 8 import android. support. v7.widget. linearLayoutManager; 9 import android. support. v7.widget. recyclerView; 10 import android. support. v7.widget. recyclerView. adapter; 11 import android. support. v7.widget. toolbar; 12 import android. support. v7.widget. recyclerView. viewHolder; 13 import android. view. layoutInflater; 14 import android. view. view; 15 import android. view. viewGroup; 16 import android. widget. linearLayout; 17 import android. widget. textView; 18 19 20 public class MainActivity extends Activity {21 22 @ Override23 protected void onCreate (Bundle savedInstanceState) {24 super. onCreate (savedInstanceState); 25 setContentView (R. layout. activity_main); 26 27 Toolbar mToolbar = (Toolbar) findViewById (R. id. toolBar); 28 mToolbar. setLogo (R. drawable. ic_launcher); 29 mToolbar. setNavigationIcon (R. drawable. ic_launcher); 30 mToolbar. setTitle ("Hello everyone"); 31 mToolbar. setSubtitle ("My name is xxx"); 32 33 TabLayout tabLayout = (TabLayout) findViewById (R. id. tabLayout); 34 for (int I = 0; I <10; I ++) 35 tabLayout. addTab (tabLayout. newTab (). setText ("option" + I); 36 tabLayout. setTabMode (TabLayout. MODE_SCROLLABLE); 37 38 RecyclerView mRecyclerView = (RecyclerView) findViewById (R. id. recyclerView); 39 LinearLayoutManager mLayoutManager = new LinearLayoutManager (this); 40 mLayoutManager. setOrientation (LinearLayout. VERTICAL); 41 mRecyclerView. setLayoutManager (mLayoutManager); 42 MyRecyclerViewAdapter adapter = new MyRecyclerViewAdapter (this); 43 mRecyclerView. setAdapter (adapter); 44 45} 46 47 private class MyViewHolder extends ViewHolder {48 49 public TextView text; 50 51 public MyViewHolder (View itemView) {52 super (itemView ); 53 text = (TextView) itemView. findViewById (android. r. id. text1); 54} 55} 56 57 private class MyRecyclerViewAdapter extends Adapter <MyViewHolder> {58 59 private LayoutInflater inflater; 60 61 public MyRecyclerViewAdapter (Context context) {62 inflater = LayoutInflater. from (context); 63} 64 65 @ Override66 public int getItemCount () {67 68 return 100; 69} 70 71 @ Override72 public void onBindViewHolder (MyViewHolder viewHolder, int position) {73 74 viewHolder. text. setText ("test data:" + position); 75} 76 77 @ Override78 public MyViewHolder onCreateViewHolder (ViewGroup viewGroup, int arg1) {79 80 View v = inflater. inflate (android. r. layout. simple_list_item_1, null); 81 MyViewHolder holder = new MyViewHolder (v); 82 83 return holder; 84} 85 86} 87 88}

 

Possible problems:

Java. lang. reflect. InvocationTargetException: http://www.cnblogs.com/zzw1994/p/5004564.html appears with android. support. v7.widget. RecyclerView

Java. lang. reflect. InvocationTargetException: http://www.cnblogs.com/zzw1994/p/5012467.html appears with android. support. design