basic activity

zhgc

1. package com.example.administrator.myapplication;
   
2. 
   
3. import android.os.Bundle;
   
4. import android.support.design.widget.FloatingActionButton;
   
5. import android.support.design.widget.Snackbar;
   
6. import android.support.v7.app.AppCompatActivity;
   
7. import android.support.v7.widget.Toolbar;
   
8. import android.view.View;
   
9. import android.view.Menu;
   
10. import android.view.MenuItem;
    
11. 
    
12. public class MainActivity extends AppCompatActivity {
    
13. 
    
14.     @Override
    
15.     protected void onCreate(Bundle savedInstanceState) {
    
16.         super.onCreate(savedInstanceState);
    
17.         setContentView(R.layout.activity_main);
    
18.         Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    
19.         setSupportActionBar(toolbar);
    
20. 
    
21.         FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
    
22.         fab.setOnClickListener(new View.OnClickListener() {
    
23.             @Override
    
24.             public void onClick(View view) {
    
25.                 Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
    
26.                         .setAction("Action", null).show();
    
27.             }
    
28.         });
    
29.     }
    
30. 
    
31.     @Override
    
32.     public boolean onCreateOptionsMenu(Menu menu) {
    
33.         // Inflate the menu; this adds items to the action bar if it is present.
    
34.         getMenuInflater().inflate(R.menu.menu_main, menu);
    
35.         return true;
    
36.     }
    
37. 
    
38.     @Override
    
39.     public boolean onOptionsItemSelected(MenuItem item) {
    
40.         // Handle action bar item clicks here. The action bar will
    
41.         // automatically handle clicks on the Home/Up button, so long
    
42.         // as you specify a parent activity in AndroidManifest.xml.
    
43.         int id = item.getItemId();
    
44. 
    
45.         //noinspection SimplifiableIfStatement
    
46.         if (id == R.id.action_settings) {
    
47.             return true;
    
48.         }
    
49. 
    
50.         return super.onOptionsItemSelected(item);
    
51.     }
    
52. }
    

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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:layout_width="match_parent"
   
6.     android:layout_height="match_parent"
   
7.     android:fitsSystemWindows="false"
   
8.     tools:context="com.example.administrator.myapplication.MainActivity">
   
9. 
   
10.     <android.support.design.widget.AppBarLayout
    
11.         android:layout_width="match_parent"
    
12.         android:layout_height="wrap_content"
    
13.         android:theme="@style/AppTheme.AppBarOverlay">
    
14. 
    
15.         <android.support.v7.widget.Toolbar
    
16.             android:id="@+id/toolbar"
    
17.             android:layout_width="match_parent"
    
18.             android:layout_height="?attr/actionBarSize"
    
19.             android:background="?attr/colorPrimary"
    
20.             app:popupTheme="@style/AppTheme.PopupOverlay" />
    
21. 
    
22.     </android.support.design.widget.AppBarLayout>
    
23. 
    
24.     <include layout="@layout/content_main" />
    
25. 
    
26.     <android.support.design.widget.FloatingActionButton
    
27.         android:id="@+id/fab"
    
28.         android:layout_width="wrap_content"
    
29.         android:layout_height="wrap_content"
    
30.         android:layout_gravity="bottom|end"
    
31.         android:layout_margin="@dimen/fab_margin"
    
32.         app:srcCompat="@android:drawable/ic_dialog_email" />
    
33. 
    
34. </android.support.design.widget.CoordinatorLayout>
    

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zhgc

1. <?xml version="1.0" encoding="utf-8"?>
   
2. <android.support.constraint.ConstraintLayout 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:layout_width="match_parent"
   
6.     android:layout_height="match_parent"
   
7.     app:layout_behavior="@string/appbar_scrolling_view_behavior"
   
8.     tools:context="com.example.administrator.myapplication.MainActivity"
   
9.     tools:showIn="@layout/activity_main">
   
10. 
    
11.     <TextView
    
12.         android:layout_width="wrap_content"
    
13.         android:layout_height="wrap_content"
    
14.         android:text="Hello World!"
    
15.         app:layout_constraintBottom_toBottomOf="parent"
    
16.         app:layout_constraintLeft_toLeftOf="parent"
    
17.         app:layout_constraintRight_toRightOf="parent"
    
18.         app:layout_constraintTop_toTopOf="parent" />
    
19. 
    
20. </android.support.constraint.ConstraintLayout>
    

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zhgc

1. <menu 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.     tools:context="com.example.administrator.myapplication.MainActivity">
   
5.     <item
   
6.         android:id="@+id/action_settings"
   
7.         android:orderInCategory="100"
   
8.         android:title="@string/action_settings"
   
9.         app:showAsAction="never" />
   
10.     <item
    
11.         android:orderInCategory="101"
    
12.         android:title="Item" />
    
13.     <item android:title="Item" />
    
14.     <item android:title="Item" />
    
15. </menu>
    

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zhgc

1. <?xml version="1.0" encoding="utf-8"?>
   
2. <resources>
   
3.     <color name="colorPrimary">#3F51B5</color>
   
4.     <color name="colorPrimaryDark">#303F9F</color>
   
5.     <color name="colorAccent">#FF4081</color>
   
6. </resources>
   

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