我遵循了微软关于如何在Xamarin.Android中制作一个闪屏的教程，并且它工作正常。 现在我想在位图下面插入一个进度环。 我试过不同的方法，但似乎找不到正确的方法
这是闪屏代码:
splash_screen.xml
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<color android:color="@color/splash_background"/>
</item>
<item android:left="20dp">
<bitmap
android:src="@mipmap/coronamap_bianco"
android:tileMode="disabled"
android:gravity="center"/>
</item>
</layer-list>
参考资料>中splash样式； 值>； styles.xml
<style name="MyTheme.Splash" parent ="Theme.AppCompat.Light.NoActionBar">
<item name="android:windowBackground">@drawable/splash_screen</item>
<item name="android:windowNoTitle">true</item>
<item name="android:windowFullscreen">false</item>
<item name="android:windowContentOverlay">@null</item>
<item name="android:windowActionBar">true</item>
<item name="android:statusBarColor">#304057</item>
</style>
飞溅活性cs
[Activity(Theme = "@style/MyTheme.Splash", MainLauncher = true, NoHistory = true)]
public class SplashActivity : AppCompatActivity
{
public override void OnCreate(Bundle savedInstanceState, PersistableBundle persistentState)
{
base.OnCreate(savedInstanceState, persistentState);
}
// Launches the startup task
protected override void OnResume()
{
base.OnResume();
StartActivity(new Intent(Application.Context, typeof(MainActivity)));
Finish();
}
}
您可以为闪屏创建一个布局，在该布局中创建一个图像和一个加载圆圈
splash_screen.xml activity代码
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/iv_splash_screeen"
android:layout_width="100dp"
android:layout_height="100dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.45"
app:srcCompat="@drawable/my_logo" />
<ProgressBar
android:id="@+id/progress_bar"
style="?android:attr/progressBarStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/iv_splash_screeen" />
</androidx.constraintlayout.widget.ConstraintLayout>
在activity中，OnCreate设置布局SplashActivity.cs
[Activity(Theme = "@style/MyTheme.Splash", MainLauncher = true, NoHistory = true)]
public class SplashActivity : AppCompatActivity
{
public override void OnCreate(Bundle savedInstanceState, PersistableBundle persistentState)
{
base.OnCreate(savedInstanceState, persistentState);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.splash_screen);
}
.....
...
}
输出:
