我有一个线性布局，我想显示或隐藏与动画，推动布局向上或向下每当我改变其可见性。
我在那里看过一些样品，但没有一个适合我的需要。
我已经为动画创建了两个xml文件，但我不知道当我改变线性布局的可见性时如何启动它们。
当前回答
这里有另一种方法来处理多个按钮(在这个例子中是ImageView)
MainActivity.java
findViewById(R.id.arrowIV).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (strokeWidthIV.getAlpha() == 0f) {
findViewById(R.id.arrowIV).animate().rotationBy(180);
strokeWidthIV.animate().translationXBy(-120 * 4).alpha(1f);
findViewById(R.id.colorChooseIV).animate().translationXBy(-120 * 3).alpha(1f);
findViewById(R.id.saveIV).animate().translationXBy(-120 * 2).alpha(1f);
findViewById(R.id.clearAllIV).animate().translationXBy(-120).alpha(1f);
} else {
findViewById(R.id.arrowIV).animate().rotationBy(180);
strokeWidthIV.animate().translationXBy(120 * 4).alpha(0f);
findViewById(R.id.colorChooseIV).animate().translationXBy(120 * 3).alpha(0f);
findViewById(R.id.saveIV).animate().translationXBy(120 * 2).alpha(0f);
findViewById(R.id.clearAllIV).animate().translationXBy(120).alpha(0f);
}
}
});
activity_main.xml
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".activity.MainActivity">
<ImageView
android:id="@+id/strokeWidthIV"
android:layout_width="48dp"
android:layout_height="48dp"
android:layout_margin="8dp"
android:alpha="0"
android:contentDescription="Clear All"
android:padding="4dp"
android:scaleType="fitXY"
android:src="@drawable/ic_edit"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:ignore="HardcodedText" />
<ImageView
android:id="@+id/colorChooseIV"
android:layout_width="48dp"
android:layout_height="48dp"
android:layout_margin="8dp"
android:alpha="0"
android:contentDescription="Clear All"
android:padding="4dp"
android:scaleType="fitXY"
android:src="@drawable/ic_palette"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:ignore="HardcodedText" />
<ImageView
android:id="@+id/saveIV"
android:layout_width="48dp"
android:layout_height="48dp"
android:layout_margin="8dp"
android:alpha="0"
android:contentDescription="Clear All"
android:padding="4dp"
android:scaleType="fitXY"
android:src="@drawable/ic_save"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:ignore="HardcodedText" />
<ImageView
android:id="@+id/clearAllIV"
android:layout_width="48dp"
android:layout_height="48dp"
android:layout_margin="8dp"
android:alpha="0"
android:contentDescription="Clear All"
android:padding="4dp"
android:scaleType="fitXY"
android:src="@drawable/ic_clear_all"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:ignore="HardcodedText" />
<ImageView
android:id="@+id/arrowIV"
android:layout_width="48dp"
android:layout_height="48dp"
android:layout_margin="8dp"
android:contentDescription="Arrow"
android:padding="4dp"
android:scaleType="fitXY"
android:src="@drawable/ic_arrow"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:ignore="HardcodedText" />
</androidx.constraintlayout.widget.ConstraintLayout>
其他回答
你可以上下滑动任何视图或布局使用咆哮的代码在安卓应用程序
boolean isClicked = false;
LinearLayout mLayoutTab = (LinearLayout) findViewById(R.id.linearlayout);
if(isClicked) {
isClicked = false;
mLayoutTab.animate()
.translationYBy(120)
.translationY(0)
.setDuration(getResources().getInteger(android.R.integer.config_mediumAnimTime));
} else {
isClicked = true;
mLayoutTab.animate()
.translationYBy(0)
.translationY(120)
.setDuration(getResources().getInteger(android.R.integer.config_mediumAnimTime));
}
使用这个类:
public class ExpandCollapseExtention {
public static void expand(View view) {
view.setVisibility(View.VISIBLE);
final int widthSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
final int heightSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
view.measure(widthSpec, heightSpec);
ValueAnimator mAnimator = slideAnimator(view, 0, view.getMeasuredHeight());
mAnimator.start();
}
public static void collapse(final View view) {
int finalHeight = view.getHeight();
ValueAnimator mAnimator = slideAnimator(view, finalHeight, 0);
mAnimator.addListener(new Animator.AnimatorListener() {
@Override
public void onAnimationEnd(Animator animator) {
view.setVisibility(View.GONE);
}
@Override
public void onAnimationStart(Animator animation) {
}
@Override
public void onAnimationCancel(Animator animation) {
}
@Override
public void onAnimationRepeat(Animator animation) {
}
});
mAnimator.start();
}
private static ValueAnimator slideAnimator(final View v, int start, int end) {
ValueAnimator animator = ValueAnimator.ofInt(start, end);
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
int value = (Integer) valueAnimator.getAnimatedValue();
ViewGroup.LayoutParams layoutParams = v.getLayoutParams();
layoutParams.height = value;
v.setLayoutParams(layoutParams);
}
});
return animator;
}
}
使用ObjectAnimator
private fun slideDown(view: View) {
val height = view.height
ObjectAnimator.ofFloat(view, View.TRANSLATION_Y, 0f, height.toFloat()).apply {
duration = 1000
start()
}
}
private fun slideUp(view: View) {
val height = view.height
ObjectAnimator.ofFloat(view, View.TRANSLATION_Y, height.toFloat(), 0f)).apply {
duration = 1000
start()
}
}
如果你想同时显示/隐藏多个视图，你可以使用TransitionSet(因为你不能同时播放2个“单个”过渡)
fun slideTopBottomVisibility(topLayout: View, bottomLayout: View, show: Boolean) {
val topTransition: Transition = Slide(Gravity.TOP)
topTransition.duration = 600
topTransition.addTarget(topLayout)
val bottomTransition: Transition = Slide(Gravity.BOTTOM)
bottomTransition.duration = 600
bottomTransition.addTarget(bottomLayout)
val transitionSet = TransitionSet()
transitionSet.addTransition(topTransition)
transitionSet.addTransition(bottomTransition)
TransitionManager.beginDelayedTransition(topLayout.parent as ViewGroup, transitionSet)
topLayout.visibility = if (show) View.VISIBLE else View.GONE
bottomLayout.visibility = if (show) View.VISIBLE else View.GONE
}
一个完整的答案，在onClick中切换视图可见性，也翻转箭头，并在隐藏组件时平滑地向上移动其他视图。
private fun toggleRecyclerViewVisibility(
recyclerView: RecyclerView,
container: FrameLayout,
arrow: ImageView
) {
//toggle arrow direction, also block user clicks until animation finishes.
arrow
.animate()
.rotation(
if (arrow.rotation == 0F)
180F
else 0F
)
.withStartAction { container.isClickable = false }
.withEndAction { container.isClickable = true }
.start()
//toggle recyclerview visibility with animation.
with(recyclerView) {
var cof = -1
var vis = View.GONE
var alph = 0F
if (visibility == View.GONE) {
cof = 0
vis = View.VISIBLE
alph = 1F
}
animate()
.translationY(height.toFloat() * cof)
.alpha(alph)
.withStartAction {//in case showing the recyclerview show it at the beginning.
if (vis == View.VISIBLE)
visibility = View.VISIBLE
}
.withEndAction {//in case hiding the recyclerview hide it at the end.
if (vis == View.GONE)
visibility = View.GONE
}
.start()
}
}
视图是这样的
<LinearLayout
android:id="@+id/subRootLinearView"
android:animateLayoutChanges="true"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<!--other views-->
<LinearLayout
android:id="@+id/Container"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<FrameLayout
android:id="@+id/header"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/backgroundGray"
android:padding="16dp">
<TextView
android:id="@+id/text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/awaitingConfirmation"
android:textColor="@color/colorText"
android:textSize="16sp" />
<ImageView
android:id="@+id/arrow_image_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="end|center"
android:src="@drawable/ic_arrow" />
</FrameLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recycler"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager" />
</LinearLayout>
</LinearLayout>
<!--other views-->
</LinearLayout>
然后在代码中首先添加这一行，这解决了animateLayoutChanges在大嵌套视图中不工作的问题，这基本上使其他视图在隐藏recyclerview时平滑地向上移动
subRootLinearView.layoutTransition.enableTransitionType(LayoutTransition.CHANGING)
你的父线性布局也应该包含这个属性
android:animateLayoutChanges="true"
然后用视图调用该方法
toggleRecyclerViewVisibility(
recycler,
header,
arrowImageView
)
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