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.backgroundMode(FlutterActivityLaunchConfigs.BackgroundMode.transparent)
.build(context)
);<code_end>
<code_start>// Using a new FlutterEngine.
startActivity(
FlutterActivity
.withNewEngine()
.backgroundMode(FlutterActivityLaunchConfigs.BackgroundMode.transparent)
.build(this)
);
// Using a cached FlutterEngine.
startActivity(
FlutterActivity
.withCachedEngine("my_engine_id")
.backgroundMode(FlutterActivityLaunchConfigs.BackgroundMode.transparent)
.build(this)
);<code_end>
You now have a FlutterActivity with a transparent background.info Note
Make sure that your Flutter content also includes a
translucent background. If your Flutter UI paints a
solid background color, then it still appears as
though your FlutterActivity has an opaque background.
<topic_end>
<topic_start>Add a Flutter Fragment to an Android app
This guide describes how to add a Flutter Fragment to an existing
Android app. In Android, a Fragment represents a modular
piece of a larger UI. A Fragment might be used to present
a sliding drawer, tabbed content, a page in a ViewPager,
or it might simply represent a normal screen in a
single-Activity app. Flutter provides a FlutterFragment
so that developers can present a Flutter experience any place
that they can use a regular Fragment.If an Activity is equally applicable for your application needs,
consider using a FlutterActivity instead of a
FlutterFragment, which is quicker and easier to use.FlutterFragment allows developers to control the following
details of the Flutter experience within the Fragment:FlutterFragment also comes with a number of calls that
must be forwarded from its surrounding Activity.
These calls allow Flutter to react appropriately to OS events.All varieties of FlutterFragment, and its requirements,
are described in this guide.<topic_end>
<topic_start>
Add a FlutterFragment to an Activity with a new FlutterEngine
The first thing to do to use a FlutterFragment is to add it to a host
Activity.To add a FlutterFragment to a host Activity, instantiate and
attach an instance of FlutterFragment in onCreate() within the
Activity, or at another time that works for your app:
<code_start>public class MyActivity extends FragmentActivity {
// Define a tag String to represent the FlutterFragment within this
// Activity's FragmentManager. This value can be whatever you'd like.
private static final String TAG_FLUTTER_FRAGMENT = "flutter_fragment";
// Declare a local variable to reference the FlutterFragment so that you
// can forward calls to it later.
private FlutterFragment flutterFragment;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Inflate a layout that has a container for your FlutterFragment.
// For this example, assume that a FrameLayout exists with an ID of
// R.id.fragment_container.
setContentView(R.layout.my_activity_layout);
// Get a reference to the Activity's FragmentManager to add a new
// FlutterFragment, or find an existing one.
FragmentManager fragmentManager = getSupportFragmentManager();
// Attempt to find an existing FlutterFragment,
// in case this is not the first time that onCreate() was run.
flutterFragment = (FlutterFragment) fragmentManager
.findFragmentByTag(TAG_FLUTTER_FRAGMENT);
// Create and attach a FlutterFragment if one does not exist.
if (flutterFragment == null) {
flutterFragment = FlutterFragment.createDefault();
fragmentManager
.beginTransaction()
.add(
R.id.fragment_container,
flutterFragment,
TAG_FLUTTER_FRAGMENT
)
.commit();
}
}
}<code_end>
<code_start>class MyActivity : FragmentActivity() {
companion object {
// Define a tag String to represent the FlutterFragment within this
// Activity's FragmentManager. This value can be whatever you'd like.
private const val TAG_FLUTTER_FRAGMENT = "flutter_fragment"
}
// Declare a local variable to reference the FlutterFragment so that you
// can forward calls to it later.
private var flutterFragment: FlutterFragment? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
// Inflate a layout that has a container for your FlutterFragment. For
// this example, assume that a FrameLayout exists with an ID of
// R.id.fragment_container.
setContentView(R.layout.my_activity_layout)
// Get a reference to the Activity's FragmentManager to add a new
// FlutterFragment, or find an existing one.
val fragmentManager: FragmentManager = supportFragmentManager
// Attempt to find an existing FlutterFragment, in case this is not the
// first time that onCreate() was run.
flutterFragment = fragmentManager