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
其中一个简单的方法是:
containerView.setLayoutTransition(LayoutTransition())
containerView.layoutTransition.enableTransitionType(LayoutTransition.CHANGING)
随着Android 3.0 (Honeycomb)引入的新动画API，创建这样的动画非常简单。
将视图向下滑动一段距离:
view.animate().translationY(distance);
你可以稍后将视图滑回原来的位置，如下所示:
view.animate().translationY(0);
您还可以轻松地组合多个动画。下面的动画会将一个视图按高度向下滑动，同时淡入:
// Prepare the View for the animation
view.setVisibility(View.VISIBLE);
view.setAlpha(0.0f);
// Start the animation
view.animate()
.translationY(view.getHeight())
.alpha(1.0f)
.setListener(null);
然后，您可以将视图淡出，并将其滑回原始位置。我们还设置了一个AnimatorListener，这样我们可以在动画完成后将视图的可见性设置为GONE:
view.animate()
.translationY(0)
.alpha(0.0f)
.setListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
super.onAnimationEnd(animation);
view.setVisibility(View.GONE);
}
});
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
}
现在可见性改变动画应该通过过渡API来完成，该API在支持(androidx)包中可用。只需调用TransitionManager。beginDelayedTransition方法使用Slide过渡，然后改变视图的可见性。
import androidx.transition.Slide;
import androidx.transition.Transition;
import androidx.transition.TransitionManager;
private void toggle(boolean show) {
View redLayout = findViewById(R.id.redLayout);
ViewGroup parent = findViewById(R.id.parent);
Transition transition = new Slide(Gravity.BOTTOM);
transition.setDuration(600);
transition.addTarget(R.id.redLayout);
TransitionManager.beginDelayedTransition(parent, transition);
redLayout.setVisibility(show ? View.VISIBLE : View.GONE);
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/parent"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<Button
android:id="@+id/btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="play" />
<LinearLayout
android:id="@+id/redLayout"
android:layout_width="match_parent"
android:layout_height="400dp"
android:background="#5f00"
android:layout_alignParentBottom="true" />
</RelativeLayout>
用另一个默认和自定义转换示例检查这个答案。
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>
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