java - 动画横幅从左向右滑动(屏幕外到屏幕上)

Question

我正在尝试通过单击按钮将文本横幅从线性布局外部设置为线性布局屏幕上的动画，但通知文本横幅在应用程序启动时仍保留在屏幕上。

带有通知横幅文本的我的 Activity

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:orientation="vertical"
    android:background="@color/white"
    android:clipChildren="false"
    android:layout_height="match_parent">

<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/colorPrimary" >
    <ImageButton
        android:id="@+id/go_back"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="13dp"
        android:layout_alignLeft="@id/title"
        android:layout_alignParentLeft="true"
        android:background="@mipmap/back" />

    <TextView
        android:id="@+id/title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="View Product"
        android:textStyle="bold"
        android:textSize="25sp"
        android:layout_centerInParent="true"
        android:paddingBottom="5dp"
        android:textAlignment="center"
        android:layout_marginTop="10dp"
        android:layout_marginBottom="10dp"
        android:textColor="@color/white"/>

    <include android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignRight="@id/title"
        android:layout_alignParentRight="true"
        layout="@layout/notification_layout"/>
</RelativeLayout>

<include android:layout_width="match_parent"
    android:layout_height="wrap_content"
    layout="@layout/loader"/>

<include android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignRight="@id/title"
    android:layout_alignParentRight="true"
    layout="@layout/alert_banner"/>
<ImageView
    android:id="@+id/product_image"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:layout_marginLeft="10dp"
    android:layout_marginRight="10dp"
    android:layout_marginTop="10dp"
    android:scaleType="fitXY"
    android:adjustViewBounds="true"
    app:srcCompat="@drawable/slider_item_2" />

<TextView
    android:id="@+id/product_name"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="Nike Air Mag - Limited Edition Sneakers"
    android:textStyle="bold"
    android:textSize="25sp"
    android:textAlignment="center"
    android:layout_margin="4dp"
    android:textColor="@color/print"/>

<Button
    android:id="@+id/add_to_cart"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:drawableRight="@mipmap/add"
    android:layout_marginLeft="25dp"
    android:layout_marginRight="25dp"
    android:layout_marginTop="30dp"
    android:textColor="@color/white"
    android:textStyle="bold"
    android:textSize="20sp"
    android:layout_marginBottom="10dp"
    android:background="@drawable/button_rounded_corners"
    android:paddingRight="10dp"
    android:text="Add to Cart" />

在我的 java 类中，我用下面的代码开始动画

  //This is done when initializing the view
LinearLayout.LayoutParams params = (LinearLayout.LayoutParams)
            product_image.getLayoutParams();
    params.setMargins(-1 * alert_info.getWidth(), 0, 0, 0);
    alert_info.setLayoutParams(params);

//when the button is clicked
ObjectAnimator animX = ObjectAnimator.ofFloat(alert_info,
                    View.TRANSLATION_X, -1* alert_info.getWidth(), 0);
            animX.setDuration(500);
            // alert_info.setVisibility(View.VISIBLE);
            animX.start();

但它不起作用，应用程序启动时 View 仍保留在屏幕上

Answer 1

这里是 View 滑动动画的代码。

在FromRightAnimation

private Animation inFromRightAnimation() {
    Animation inFromRight = new TranslateAnimation( Animation.RELATIVE_TO_PARENT, +1.0f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f);
    inFromRight.setDuration(500);
    inFromRight.setInterpolator(new AccelerateInterpolator()); 
    return inFromRight; 
}

outToLeft动画

private Animation outToLeftAnimation() {
    Animation outtoLeft = new TranslateAnimation( Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, -1.0f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f);
    outtoLeft.setDuration(500);
    outtoLeft.setInterpolator(new AccelerateInterpolator());
    return outtoLeft;
} 

在FromLeftAnimation

private Animation inFromLeftAnimation() {
    Animation inFromLeft = new TranslateAnimation( Animation.RELATIVE_TO_PARENT, -1.0f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f);
    inFromLeft.setDuration(500);
    inFromLeft.setInterpolator(new AccelerateInterpolator());
    return inFromLeft;
}

outToRight动画

private Animation outToRightAnimation() {
    Animation outtoRight = new TranslateAnimation( Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, +1.0f, Animation.RELATIVE_TO_PARENT, 0.0f, Animation.RELATIVE_TO_PARENT, 0.0f);
    outtoRight.setDuration(500);
    outtoRight.setInterpolator(new AccelerateInterpolator());
    return outtoRight;
}

现在在 View 上开始动画

View.startAnimation(inFromRightAnimation());