android - shadow effect and marquee effect Textview

1. TextView with shadow

①. android:shadowColor="@color/black"
sets the shadow color and needs to be used with shadowRadius
②. android:shadowRadius="3.0"
sets the shadow blur level. Setting it to 0.1 will change the font color. It is recommended to set 3.0
③. android :shadowDx="10"
sets the offset of the shadow in the horizontal direction, the abscissa position where the shadow starts in the horizontal direction
④, android:shadowDy="10"
sets the offset of the shadow in the vertical direction, the ordinate position where the shadow starts in the vertical direction Location

Example:

    <androidx.appcompat.widget.AppCompatTextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        android:shadowRadius="3.0"
        android:shadowColor="@color/black"
        android:shadowDx="10"
        android:shadowDy="10"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

2. TextView with marquee effect

①, android:singleLine="true"
content is displayed in the line
②, android:focusable="true"
whether it can obtain focus
③, android:focusableInTouchMode="true"
controls whether the view can obtain focus in touch mode
④, android:ellipsize=
Where does "marquee" add omitted text⑤
, android:marqueeRepeatLimit="marquee_forever"
subtitle animation repetition times

Implementation method 1: Create a new textview that inherits AppCompatTextView and overrides the isFocused() method

public class CustomTextView extends AppCompatTextView {
    
    

    public CustomTextView(@NonNull Context context) {
    
    
        super(context);
    }
    public CustomTextView(@NonNull Context context, @Nullable AttributeSet attrs) {
    
    
        super(context, attrs);
    }
    public CustomTextView(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
    
    
        super(context, attrs, defStyleAttr);
    }
    @Override
    public boolean isFocused() {
    
    
        return true;
    }
}

Use custom views in xml:

  <com.lxd.xdplayer.CustomTextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World!"
        android:singleLine="true"
        android:focusable="true"
        android:focusableInTouchMode="true"
        android:ellipsize="marquee"
        android:marqueeRepeatLimit="marquee_forever"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"/>

Implementation method 2: Add in AppCompatTextView of xml layout file

    <androidx.appcompat.widget.AppCompatTextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World!"
        android:singleLine="true"
        android:focusable="true"
        android:focusableInTouchMode="true"
        android:ellipsize="marquee"
        android:marqueeRepeatLimit="marquee_forever"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">
        <requestFocus/>
    </androidx.appcompat.widget.AppCompatTextView>