Android 如何使用支持库实现波纹动画？
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How to achieve ripple animation using support library?
提问by N Sharma
I am trying to add a ripple animation on button click. I did like below but it requires minSdKVersion to 21.
我正在尝试在按钮单击时添加波纹动画。我确实喜欢下面，但它需要 minSdKVersion 到 21。
ripple.xml
涟漪文件
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
android:color="?android:colorControlHighlight">
<item>
<shape android:shape="rectangle">
<solid android:color="?android:colorAccent" />
</shape>
</item>
</ripple>
Button
按钮
<com.devspark.robototextview.widget.RobotoButton
android:id="@+id/loginButton"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/ripple"
android:text="@string/login_button" />
I want to make it backward compatible with the design library.
我想让它与设计库向后兼容。
How this can be done?
如何做到这一点？
回答by Ben De La Haye
Basic ripple setup
基本纹波设置
Ripples contained within the view.
android:background="?selectableItemBackground"Ripples that extend beyond the view's bounds:
android:background="?selectableItemBackgroundBorderless"Have a look herefor resolving
?(attr)xml references in Java code.
视图中包含的涟漪。
android:background="?selectableItemBackground"超出视图边界的涟漪：
android:background="?selectableItemBackgroundBorderless"查看此处以解析
?(attr)Java 代码中的 xml 引用。
Support Library
支持库
- Using
?attr:(or the?shorthand) instead of?android:attrreferences the support library, so is available back to API 7.
- 使用
?attr:（或?简写）而不是?android:attr引用支持库，因此可返回 API 7。
Ripples with images/backgrounds
带有图像/背景的涟漪
- To have a image or background and overlaying ripple the easiest solution is to wrap the
Viewin aFrameLayoutwith the ripple set withsetForeground()orsetBackground().
- 要拥有图像或背景并叠加波纹，最简单的解决方案是将
ViewaFrameLayout与波纹设置为setForeground()或setBackground()。
Honestly there is no clean way of doing this otherwise.
老实说，否则没有干净的方法可以做到这一点。
回答by Marcin Orlowski
I formerly voted to close this question as off-topic but actually I changed my mind as this is quite nice visual effect which, unfortunately, is not yet part of support library. It will most likely show up in future update, but there's no time frame announced.
我以前投票决定关闭这个问题作为题外话，但实际上我改变了主意，因为这是非常好的视觉效果，不幸的是，它还不是支持库的一部分。它很可能会出现在未来的更新中，但没有公布时间框架。
Luckily there are few custom implementations already available:
幸运的是，很少有自定义实现可用：
- https://github.com/traex/RippleEffect
- https://github.com/balysv/material-ripple
- https://github.com/siriscac/RippleView
- https://github.com/ozodrukh/RippleDrawable
- https://github.com/traex/RippleEffect
- https://github.com/balysv/material-ripple
- https://github.com/siriscac/RippleView
- https://github.com/ozodrukh/RippleDrawable
including Materlial themed widget sets compatible with older versions of Android:
包括与旧版 Android 兼容的 Material 主题小部件集：
so you can try one of these or google for other "material widgets" or so...
所以你可以尝试其中之一或谷歌搜索其他“材料小部件”等等......
回答by Nicolas Tyler
I made a simple class that makes ripple buttons, i never needed it in the end so its not the best, But here it is:
我做了一个简单的类来制作波纹按钮，我最后从来不需要它，所以它不是最好的，但它是：
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Handler;
import android.support.annotation.NonNull;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.Button;
public class RippleView extends Button
{
private float duration = 250;
private float speed = 1;
private float radius = 0;
private Paint paint = new Paint();
private float endRadius = 0;
private float rippleX = 0;
private float rippleY = 0;
private int width = 0;
private int height = 0;
private OnClickListener clickListener = null;
private Handler handler;
private int touchAction;
private RippleView thisRippleView = this;
public RippleView(Context context)
{
this(context, null, 0);
}
public RippleView(Context context, AttributeSet attrs)
{
this(context, attrs, 0);
}
public RippleView(Context context, AttributeSet attrs, int defStyleAttr)
{
super(context, attrs, defStyleAttr);
init();
}
private void init()
{
if (isInEditMode())
return;
handler = new Handler();
paint.setStyle(Paint.Style.FILL);
paint.setColor(Color.WHITE);
paint.setAntiAlias(true);
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh)
{
super.onSizeChanged(w, h, oldw, oldh);
width = w;
height = h;
}
@Override
protected void onDraw(@NonNull Canvas canvas)
{
super.onDraw(canvas);
if(radius > 0 && radius < endRadius)
{
canvas.drawCircle(rippleX, rippleY, radius, paint);
if(touchAction == MotionEvent.ACTION_UP)
invalidate();
}
}
@Override
public boolean onTouchEvent(@NonNull MotionEvent event)
{
rippleX = event.getX();
rippleY = event.getY();
switch(event.getAction())
{
case MotionEvent.ACTION_UP:
{
getParent().requestDisallowInterceptTouchEvent(false);
touchAction = MotionEvent.ACTION_UP;
radius = 1;
endRadius = Math.max(Math.max(Math.max(width - rippleX, rippleX), rippleY), height - rippleY);
speed = endRadius / duration * 10;
handler.postDelayed(new Runnable()
{
@Override
public void run()
{
if(radius < endRadius)
{
radius += speed;
paint.setAlpha(90 - (int) (radius / endRadius * 90));
handler.postDelayed(this, 1);
}
else
{
clickListener.onClick(thisRippleView);
}
}
}, 10);
invalidate();
break;
}
case MotionEvent.ACTION_CANCEL:
{
getParent().requestDisallowInterceptTouchEvent(false);
touchAction = MotionEvent.ACTION_CANCEL;
radius = 0;
invalidate();
break;
}
case MotionEvent.ACTION_DOWN:
{
getParent().requestDisallowInterceptTouchEvent(true);
touchAction = MotionEvent.ACTION_UP;
endRadius = Math.max(Math.max(Math.max(width - rippleX, rippleX), rippleY), height - rippleY);
paint.setAlpha(90);
radius = endRadius/4;
invalidate();
return true;
}
case MotionEvent.ACTION_MOVE:
{
if(rippleX < 0 || rippleX > width || rippleY < 0 || rippleY > height)
{
getParent().requestDisallowInterceptTouchEvent(false);
touchAction = MotionEvent.ACTION_CANCEL;
radius = 0;
invalidate();
break;
}
else
{
touchAction = MotionEvent.ACTION_MOVE;
invalidate();
return true;
}
}
}
return false;
}
@Override
public void setOnClickListener(OnClickListener l)
{
clickListener = l;
}
}
EDIT
编辑
Since many people are looking for something like this i made a class that can make other views have the ripple effect:
由于很多人都在寻找这样的东西，我创建了一个可以使其他视图产生连锁反应的类：
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.os.Handler;
import android.support.annotation.NonNull;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
public class RippleViewCreator extends FrameLayout
{
private float duration = 150;
private int frameRate = 15;
private float speed = 1;
private float radius = 0;
private Paint paint = new Paint();
private float endRadius = 0;
private float rippleX = 0;
private float rippleY = 0;
private int width = 0;
private int height = 0;
private Handler handler = new Handler();
private int touchAction;
public RippleViewCreator(Context context)
{
this(context, null, 0);
}
public RippleViewCreator(Context context, AttributeSet attrs)
{
this(context, attrs, 0);
}
public RippleViewCreator(Context context, AttributeSet attrs, int defStyleAttr)
{
super(context, attrs, defStyleAttr);
init();
}
private void init()
{
if (isInEditMode())
return;
paint.setStyle(Paint.Style.FILL);
paint.setColor(getResources().getColor(R.color.control_highlight_color));
paint.setAntiAlias(true);
setWillNotDraw(true);
setDrawingCacheEnabled(true);
setClickable(true);
}
public static void addRippleToView(View v)
{
ViewGroup parent = (ViewGroup)v.getParent();
int index = -1;
if(parent != null)
{
index = parent.indexOfChild(v);
parent.removeView(v);
}
RippleViewCreator rippleViewCreator = new RippleViewCreator(v.getContext());
rippleViewCreator.setLayoutParams(v.getLayoutParams());
if(index == -1)
parent.addView(rippleViewCreator, index);
else
parent.addView(rippleViewCreator);
rippleViewCreator.addView(v);
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh)
{
super.onSizeChanged(w, h, oldw, oldh);
width = w;
height = h;
}
@Override
protected void dispatchDraw(@NonNull Canvas canvas)
{
super.dispatchDraw(canvas);
if(radius > 0 && radius < endRadius)
{
canvas.drawCircle(rippleX, rippleY, radius, paint);
if(touchAction == MotionEvent.ACTION_UP)
invalidate();
}
}
@Override
public boolean onInterceptTouchEvent(MotionEvent event)
{
return true;
}
@Override
public boolean onTouchEvent(@NonNull MotionEvent event)
{
rippleX = event.getX();
rippleY = event.getY();
touchAction = event.getAction();
switch(event.getAction())
{
case MotionEvent.ACTION_UP:
{
getParent().requestDisallowInterceptTouchEvent(false);
radius = 1;
endRadius = Math.max(Math.max(Math.max(width - rippleX, rippleX), rippleY), height - rippleY);
speed = endRadius / duration * frameRate;
handler.postDelayed(new Runnable()
{
@Override
public void run()
{
if(radius < endRadius)
{
radius += speed;
paint.setAlpha(90 - (int) (radius / endRadius * 90));
handler.postDelayed(this, frameRate);
}
else if(getChildAt(0) != null)
{
getChildAt(0).performClick();
}
}
}, frameRate);
break;
}
case MotionEvent.ACTION_CANCEL:
{
getParent().requestDisallowInterceptTouchEvent(false);
break;
}
case MotionEvent.ACTION_DOWN:
{
getParent().requestDisallowInterceptTouchEvent(true);
endRadius = Math.max(Math.max(Math.max(width - rippleX, rippleX), rippleY), height - rippleY);
paint.setAlpha(90);
radius = endRadius/3;
invalidate();
return true;
}
case MotionEvent.ACTION_MOVE:
{
if(rippleX < 0 || rippleX > width || rippleY < 0 || rippleY > height)
{
getParent().requestDisallowInterceptTouchEvent(false);
touchAction = MotionEvent.ACTION_CANCEL;
break;
}
else
{
invalidate();
return true;
}
}
}
invalidate();
return false;
}
@Override
public final void addView(@NonNull View child, int index, ViewGroup.LayoutParams params)
{
//limit one view
if (getChildCount() > 0)
{
throw new IllegalStateException(this.getClass().toString()+" can only have one child.");
}
super.addView(child, index, params);
}
}
回答by Amintabar
It's very simple ;-)
这很简单;-)
First you must create two drawable file one for old api version and another one for newest version, Of course! if you create the drawable file for newest api version android studio suggest you to create old one automatically. and finally set this drawable to your background view.
首先，您必须创建两个可绘制文件，一个用于旧 api 版本，另一个用于最新版本，当然！如果您为最新的 api 版本 android studio 创建可绘制文件，建议您自动创建旧的。最后将此 drawable 设置为您的背景视图。
Sample drawable for new api version (res/drawable-v21/ripple.xml):
新 api 版本的可绘制示例 (res/drawable-v21/ripple.xml)：
<?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
android:color="?android:colorControlHighlight">
<item>
<shape android:shape="rectangle">
<solid android:color="@color/colorPrimary" />
<corners android:radius="@dimen/round_corner" />
</shape>
</item>
</ripple>
Sample drawable for old api version (res/drawable/ripple.xml)
旧 api 版本的示例可绘制 (res/drawable/ripple.xml)
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<solid android:color="@color/colorPrimary" />
<corners android:radius="@dimen/round_corner" />
</shape>
For more info about ripple drawable just visit this: https://developer.android.com/reference/android/graphics/drawable/RippleDrawable.html
有关波纹可绘制的更多信息，请访问：https: //developer.android.com/reference/android/graphics/drawable/RippleDrawable.html
回答by Kenny Orellana
Sometimes you have a custom background, in that cases a better solution is use android:foreground="?selectableItemBackground"
有时您有自定义背景，在这种情况下，使用更好的解决方案 android:foreground="?selectableItemBackground"
回答by Jatin Mandanka
sometimes will b usable this line on any layout or components.
有时会在任何布局或组件上使用此行。
android:background="?attr/selectableItemBackground"
Like as.
像作为。
<RelativeLayout
android:id="@+id/relative_ticket_checkin"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
android:background="?attr/selectableItemBackground">
