How To Add Camera In Action Bar Android Studio

In its most basic form, the action bar displays the championship for the activeness on 1 side and an overflow menu on the other. Even in this simple form, the app bar provides useful information to the users, and helps to give Android apps a consistent look and feel.

Figure i. An app bar with the app title and overflow menu.

Beginning with Android three.0 (API level 11), all activities that utilize the default theme have an ActionBar as an app bar. However, app bar features accept gradually been added to the native ActionBar over various Android releases. As a result, the native ActionBar behaves differently depending on what version of the Android system a device may be using. By contrast, the most recent features are added to the support library'south version of Toolbar, and they are available on any device that tin use the support library.

For this reason, you should use the back up library's Toolbar form to implement your activities' app bars. Using the back up library's toolbar helps ensure that your app will accept consistent beliefs beyond the widest range of devices. For example, the Toolbar widget provides a cloth design experience on devices running Android ii.1 (API level 7) or after, but the native action bar doesn't support material blueprint unless the device is running Android 5.0 (API level 21) or later.

These steps depict how to gear up a Toolbar as your activity's app bar:

1. Add the v7 appcompat support library to your project, as described in Support Library Setup.
2. Make sure the activeness extends AppCompatActivity:

   Kotlin

   class MyActivity : AppCompatActivity() {   // ... }                

   Java

   public grade MyActivity extends AppCompatActivity {   // ... }                

   Note: Make this alter for every activity in your app that uses a Toolbar equally an app bar.

3. In the app manifest, set the <application> element to utilise one of appcompat's NoActionBar themes. Using i of these themes prevents the app from using the native ActionBar class to provide the app bar. For example:

   <application     android:theme="@way/Theme.AppCompat.Lite.NoActionBar"     />            

4. Add a Toolbar to the activity's layout. For case, the following layout code adds a Toolbar and gives it the advent of floating in a higher place the action:

   <android.back up.v7.widget.Toolbar    android:id="@+id/my_toolbar"    android:layout_width="match_parent"    android:layout_height="?attr/actionBarSize"    android:groundwork="?attr/colorPrimary"    android:summit="4dp"    android:theme="@fashion/ThemeOverlay.AppCompat.ActionBar"    app:popupTheme="@way/ThemeOverlay.AppCompat.Low-cal"/>            

   See the Material Design specification for recommendations regarding app bar top.

   Position the toolbar at the top of the activity's layout, since you lot are using it as an app bar.

5. In the activity's onCreate() method, telephone call the activity's setSupportActionBar() method, and pass the activity's toolbar. This method sets the toolbar every bit the app bar for the activity. For instance:

   Kotlin

   override fun onCreate(savedInstanceState: Packet?) {     super.onCreate(savedInstanceState)     setContentView(R.layout.activity_my)     // Note that the Toolbar defined in the layout has the id "my_toolbar"                  setSupportActionBar(findViewById(R.id.my_toolbar))                  }                

   Java

   @Override protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.activity_my);                  Toolbar myToolbar = (Toolbar) findViewById(R.id.my_toolbar);     setSupportActionBar(myToolbar);                  }                

Your app now has a basic action bar. By default, the action bar contains just the name of the app and an overflow menu. The options bill of fare initially contains just the Settings item. Y'all tin add together more actions to the activeness bar and the overflow bill of fare, as described in Adding and Treatment Deportment.

Employ App Bar Utility Methods

Once yous set the toolbar as an activity'south app bar, you have access to the diverse utility methods provided past the v7 appcompat support library'south ActionBar class. This arroyo lets yous do a number of useful things, like hide and testify the app bar.

To use the ActionBar utility methods, call the activity's getSupportActionBar() method. This method returns a reference to an appcompat ActionBar object. Once you have that reference, yous can phone call any of the ActionBar methods to accommodate the app bar. For example, to hide the app bar, call ActionBar.hide().

Source: https://developer.android.com/training/appbar/setting-up

Posted by: hamiltonchadoicy.blogspot.com

Share this post