首次在android应用中加载布局时如何添加提示

Question

How to add hints during the loading of layout in the app for the first time. I am attaching the screenshot taken from a app. Any reply will be helpful.

Answer 1

First, create the layout for the hint overlay:

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Your text here"/>
    <Button 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Got it!"/>
</androidx.constraintlayout.widget.ConstraintLayout>

Next, in the layout of the Activity or Fragment that the hint should be shown over, add a ViewStub at the bottom:

<ViewStub android:id="@+id/stub"
     android:inflatedId="@+id/subTree"
     android:layout="@layout/hintLayout"
     android:layout_width="match_parent"
     android:layout_height="match_parent" />

Finally, in the onCreate of your Activity or onCreateView of your Fragment , inflate the stub if it hasn't already been shown by checking SharedPreferences:

val sharedPreferences = PreferenceManager.getDefaultSharedPreferences(applicationContext)
val hasShownHint = sharedPreferences.getBoolean("showedHint", false)
if (!hasShownHint) {
    val stub = findViewById(R.id.stub);
    stub.inflate();
    val editor = sharedPreferences.edit()
    editor.putBoolean("showedHint", true)
}

Answer 2

您可以检查此库，这可能对您有所帮助，这是链接https://github.com/TakuSemba/Spotlight