Tabbed Activity

zhgc

1. package com.example.administrator.myapplicationb;
   
2. 
   
3. import android.support.design.widget.FloatingActionButton;
   
4. import android.support.design.widget.Snackbar;
   
5. import android.support.v7.app.AppCompatActivity;
   
6. import android.support.v7.widget.Toolbar;
   
7. 
   
8. import android.support.v4.app.Fragment;
   
9. import android.support.v4.app.FragmentManager;
   
10. import android.support.v4.app.FragmentPagerAdapter;
    
11. import android.support.v4.view.ViewPager;
    
12. import android.os.Bundle;
    
13. import android.view.LayoutInflater;
    
14. import android.view.Menu;
    
15. import android.view.MenuItem;
    
16. import android.view.View;
    
17. import android.view.ViewGroup;
    
18. 
    
19. import android.widget.TextView;
    
20. 
    
21. public class MainActivity extends AppCompatActivity {
    
22. 
    
23.     /**
    
24.      * The {@link android.support.v4.view.PagerAdapter} that will provide
    
25.      * fragments for each of the sections. We use a
    
26.      * {@link FragmentPagerAdapter} derivative, which will keep every
    
27.      * loaded fragment in memory. If this becomes too memory intensive, it
    
28.      * may be best to switch to a
    
29.      * {@link android.support.v4.app.FragmentStatePagerAdapter}.
    
30.      */
    
31.     private SectionsPagerAdapter mSectionsPagerAdapter;
    
32. 
    
33.     /**
    
34.      * The {@link ViewPager} that will host the section contents.
    
35.      */
    
36.     private ViewPager mViewPager;
    
37. 
    
38.     @Override
    
39.     protected void onCreate(Bundle savedInstanceState) {
    
40.         super.onCreate(savedInstanceState);
    
41.         setContentView(R.layout.activity_main);
    
42. 
    
43.         Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    
44.         setSupportActionBar(toolbar);
    
45. 
    
46.         // Create the adapter that will return a fragment for each of the three
    
47.         // primary sections of the activity.
    
48.         mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
    
49. 
    
50.         // Set up the ViewPager with the sections adapter.
    
51.         mViewPager = (ViewPager) findViewById(R.id.container);
    
52.         mViewPager.setAdapter(mSectionsPagerAdapter);
    
53. 
    
54.         FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
    
55.         fab.setOnClickListener(new View.OnClickListener() {
    
56.             @Override
    
57.             public void onClick(View view) {
    
58.                 Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
    
59.                         .setAction("Action", null).show();
    
60.             }
    
61.         });
    
62. 
    
63.     }
    
64. 
    
65. 
    
66.     @Override
    
67.     public boolean onCreateOptionsMenu(Menu menu) {
    
68.         // Inflate the menu; this adds items to the action bar if it is present.
    
69.         getMenuInflater().inflate(R.menu.menu_main, menu);
    
70.         return true;
    
71.     }
    
72. 
    
73.     @Override
    
74.     public boolean onOptionsItemSelected(MenuItem item) {
    
75.         // Handle action bar item clicks here. The action bar will
    
76.         // automatically handle clicks on the Home/Up button, so long
    
77.         // as you specify a parent activity in AndroidManifest.xml.
    
78.         int id = item.getItemId();
    
79. 
    
80.         //noinspection SimplifiableIfStatement
    
81.         if (id == R.id.action_settings) {
    
82.             return true;
    
83.         }
    
84. 
    
85.         return super.onOptionsItemSelected(item);
    
86.     }
    
87. 
    
88.     /**
    
89.      * A placeholder fragment containing a simple view.
    
90.      */
    
91.     public static class PlaceholderFragment extends Fragment {
    
92.         /**
    
93.          * The fragment argument representing the section number for this
    
94.          * fragment.
    
95.          */
    
96.         private static final String ARG_SECTION_NUMBER = "section_number";
    
97. 
    
98.         public PlaceholderFragment() {
    
99.         }
    
100. 
     
101.         /**
     
102.          * Returns a new instance of this fragment for the given section
     
103.          * number.
     
104.          */
     
105.         public static PlaceholderFragment newInstance(int sectionNumber) {
     
106.             PlaceholderFragment fragment = new PlaceholderFragment();
     
107.             Bundle args = new Bundle();
     
108.             args.putInt(ARG_SECTION_NUMBER, sectionNumber);
     
109.             fragment.setArguments(args);
     
110.             return fragment;
     
111.         }
     
112. 
     
113.         @Override
     
114.         public View onCreateView(LayoutInflater inflater, ViewGroup container,
     
115.                                  Bundle savedInstanceState) {
     
116.             View rootView = inflater.inflate(R.layout.fragment_main, container, false);
     
117.             TextView textView = (TextView) rootView.findViewById(R.id.section_label);
     
118.             textView.setText(getString(R.string.section_format, getArguments().getInt(ARG_SECTION_NUMBER)));
     
119.             return rootView;
     
120.         }
     
121.     }
     
122. 
     
123.     /**
     
124.      * A {@link FragmentPagerAdapter} that returns a fragment corresponding to
     
125.      * one of the sections/tabs/pages.
     
126.      */
     
127.     public class SectionsPagerAdapter extends FragmentPagerAdapter {
     
128. 
     
129.         public SectionsPagerAdapter(FragmentManager fm) {
     
130.             super(fm);
     
131.         }
     
132. 
     
133.         @Override
     
134.         public Fragment getItem(int position) {
     
135.             // getItem is called to instantiate the fragment for the given page.
     
136.             // Return a PlaceholderFragment (defined as a static inner class below).
     
137.             return PlaceholderFragment.newInstance(position + 1);
     
138.         }
     
139. 
     
140.         @Override
     
141.         public int getCount() {
     
142.             // Show 3 total pages.
     
143.             return 3;
     
144.         }
     
145.     }
     
146. }
     

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zhgc

1. <?xml version="1.0" encoding="utf-8"?>
   
2. <android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
   
3.     xmlns:app="http://schemas.android.com/apk/res-auto"
   
4.     xmlns:tools="http://schemas.android.com/tools"
   
5.     android:id="@+id/main_content"
   
6.     android:layout_width="match_parent"
   
7.     android:layout_height="match_parent"
   
8.     android:fitsSystemWindows="true"
   
9.     tools:context="com.example.administrator.myapplicationb.MainActivity">
   
10. 
    
11.     <android.support.design.widget.AppBarLayout
    
12.         android:id="@+id/appbar"
    
13.         android:layout_width="match_parent"
    
14.         android:layout_height="wrap_content"
    
15.         android:paddingTop="@dimen/appbar_padding_top"
    
16.         android:theme="@style/AppTheme.AppBarOverlay">
    
17. 
    
18.         <android.support.v7.widget.Toolbar
    
19.             android:id="@+id/toolbar"
    
20.             android:layout_width="match_parent"
    
21.             android:layout_height="?attr/actionBarSize"
    
22.             android:layout_weight="1"
    
23.             android:background="?attr/colorPrimary"
    
24.             app:layout_scrollFlags="scroll|enterAlways"
    
25.             app:popupTheme="@style/AppTheme.PopupOverlay"
    
26.             app:title="@string/app_name">
    
27. 
    
28.         </android.support.v7.widget.Toolbar>
    
29. 
    
30.     </android.support.design.widget.AppBarLayout>
    
31. 
    
32.     <android.support.v4.view.ViewPager
    
33.         android:id="@+id/container"
    
34.         android:layout_width="match_parent"
    
35.         android:layout_height="match_parent"
    
36.         app:layout_behavior="@string/appbar_scrolling_view_behavior" />
    
37. 
    
38.     <android.support.design.widget.FloatingActionButton
    
39.         android:id="@+id/fab"
    
40.         android:layout_width="wrap_content"
    
41.         android:layout_height="wrap_content"
    
42.         android:layout_gravity="end|bottom"
    
43.         android:layout_margin="@dimen/fab_margin"
    
44.         app:srcCompat="@android:drawable/ic_dialog_email" />
    
45. 
    
46. </android.support.design.widget.CoordinatorLayout>
    

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zhgc

1. <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
   
2.     xmlns:app="http://schemas.android.com/apk/res-auto"
   
3.     xmlns:tools="http://schemas.android.com/tools"
   
4.     android:id="@+id/constraintLayout"
   
5.     android:layout_width="match_parent"
   
6.     android:layout_height="match_parent"
   
7.     tools:context="com.example.administrator.myapplicationb.MainActivity$PlaceholderFragment">
   
8. 
   
9.     <TextView
   
10.         android:id="@+id/section_label"
    
11.         android:layout_width="wrap_content"
    
12.         android:layout_height="wrap_content"
    
13.         android:layout_marginBottom="@dimen/activity_vertical_margin"
    
14.         android:layout_marginEnd="@dimen/activity_horizontal_margin"
    
15.         android:layout_marginStart="@dimen/activity_horizontal_margin"
    
16.         android:layout_marginTop="@dimen/activity_vertical_margin"
    
17.         app:layout_constraintLeft_toLeftOf="parent"
    
18.         app:layout_constraintTop_toTopOf="@+id/constraintLayout"
    
19.         tools:layout_constraintLeft_creator="1"
    
20.         tools:layout_constraintTop_creator="1" />
    
21. 
    
22. </android.support.constraint.ConstraintLayout>

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