话说BMoveView
最初只是为了实现一个底部RadioButtton
的移动动画实现的效果,都是很久之前的一个自定义View了,现在重新修改了部分实现,优化了一些方法,支持更多的RadioButtton
个数了,以前只支持三个,现在支持五、六、七、八、N个RadioButtton
了,添加了动态实现方式。
动态图还是以前的。O(∩_∩)O
过时的上一篇链接 BMoveView,RadioGroup添加移动的特效View
RadioButton
除了变颜色,添加图片显示外,我们还可以添加如下的特定效果。动画可以增加APP的美感。
先上图:
RadioButtton移动特效.gif很多属性可以自定义
我的github 源码使用链接
BMoveView链接
很多的自定义View
欢迎点个Star
属性 | 含义 |
---|---|
circleColor | 圆环的颜色 |
lineColor | 下面的线条的颜色 |
lineDuration | 线条头的移动时间(单位ms) |
lineWidth | 线条的宽度 |
circleDuration | 圆圈的动画时间(单位ms) |
circleCenterColor | 圆圈中心的颜色(可以不和背景一样) |
circlemRadio | 圆圈的半径 |
buttonCount | button个数 |
最后一个属性是新添加的 buttonCount
,可以设置button的个数,也可以通过代码设置
mBMoveView.setButonCount(4);
以上是所有的属性,可以实现多个button的移动动画。使用方法还是差不多。可以查看github连接
在布局文件XML里
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:gravity="center"
android:layout_height="match_parent"
xmlns:yk="http://schemas.android.com/apk/res-auto"
tools:context="com.yk.bmoveview.MainActivity">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="60dp">
<com.yk.bmoveview.BMoveView
android:id="@+id/bmoveview"
android:layout_width="match_parent"
android:layout_height="60dp"
yk:circleColor="#fd4040"
yk:lineColor="#fd4040"
yk:lineDuration="800"
yk:lineWidth="3"
yk:circleDuration="500"
yk:circleCenterColor="#FFFFFF"
yk:circlemRadio="22"
/>
<RadioGroup
android:id="@+id/rg_group"
android:gravity="center"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="60dp">
<RadioButton
android:id="@+id/rb_rec"
android:button="@null"
android:text="推荐"
android:visibility="visible"
android:layout_weight="1"
android:textColor="@drawable/rb_button"
android:textSize="18sp"
android:gravity="center"
android:layout_width="0dp"
android:layout_height="match_parent"/>
<RadioButton
android:id="@+id/rb_first"
android:button="@null"
android:text="索引"
android:layout_weight="1"
android:textColor="@drawable/rb_button"
android:textSize="18sp"
android:gravity="center"
android:layout_width="0dp"
android:layout_height="match_parent"/>
<RadioButton
android:id="@+id/rb_second"
android:button="@null"
android:text="热门"
android:layout_weight="1"
android:textColor="@drawable/rb_button"
android:textSize="18sp"
android:gravity="center"
android:layout_width="0dp"
android:layout_height="match_parent"/>
<RadioButton
android:id="@+id/rb_third"
android:button="@null"
android:text="我的"
android:layout_weight="1"
android:textColor="@drawable/rb_button"
android:textSize="18sp"
android:gravity="center"
android:layout_width="0dp"
android:layout_height="match_parent"/>
</RadioGroup>
</RelativeLayout>
BMoveView
作为背景实现,添加RadioGroup
,务必保证RadioButton
的个数和我们设置的buttonCount保持一致,否者会出错。
在Activity里,如下:
public class MainActivity extends AppCompatActivity {
private int mFirstPos;
private int mLastPos;
private BMoveView mBMoveView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
bMoveInit();
}
private void bMoveInit() {
mBMoveView = (BMoveView) findViewById(R.id.bmoveview);
RadioGroup mRadioGroup= (RadioGroup) findViewById(R.id.rg_group);
((RadioButton) (mRadioGroup.getChildAt(0))).setChecked(true);
mFirstPos = 0;
mBMoveView.setButonCount(4);
mBMoveView.startAnim();
mRadioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
for (int i = 0; i < group.getChildCount(); i++) {
boolean checked = ((RadioButton) (group.getChildAt(i))).isChecked();
if(checked){
mLastPos = i;
mBMoveView.setTwoPos(mFirstPos, mLastPos);
mFirstPos = mLastPos;
}
}
}
});
}
}
主要是记录两次的位置,就能实现这个效果了,使用起来并不是很复杂。其中关键方法为
mBMoveView.setTwoPos(mFirstPos, mLastPos);
设置两次的位置,默认第一次设为0,即表示第一个位置在第一位,也是默认的选中第一个。
使用方法讲完了,下面介绍是如何实现的
主要是在onDraw里,绘制我们的view,分析动画和过程
- 一个圆圈的动画,就是旋转
- 下面一个线条,添加移动效果
- 线条移动头和尾的移动时间不同
- 移动的方向和位置
主要由以上四步骤实现,弧,移动的线条,位置,方向
/**
* Created by yukun on 18-11-12.
*/
public class BMoveView extends View {
private int mWidth;
private int mHeight;
private Paint mPaint;
private Paint mPaintLine;
private RectF mRectF;
private int mBoardWidth=50;
private int firstPos; //第一次点击位置
private int mRoationx=0;
private int mRadio=5;
private int position=0;//点击到的button位置
private int mLineEndLength;
private int mLineLength;
private int mCircleColor;
private int mLineColor;
private int mLineDuration;
private int mLineWidth;
private int mCircleDuration;
private int mCircleCenterColor;
private int mCirclemRadio;
private int mButonCount;
public BMoveView(Context context) {
super(context);
init(context,null,0);
}
public BMoveView(Context context, AttributeSet attrs) {
super(context, attrs);
init(context,attrs,0);
}
public BMoveView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context,attrs,defStyleAttr);
}
private void init(Context context, AttributeSet attrs, int defStyleAttr) {
TypedArray a = context.getTheme().obtainStyledAttributes(attrs, R.styleable.BMoveView, defStyleAttr, 0);
int n = a.getIndexCount();
for (int i = 0; i < n; i++) {
int attr = a.getIndex(i);
switch (attr) {
case R.styleable.BMoveView_circleColor:
mCircleColor = a.getColor(attr, Color.WHITE);
break;
case R.styleable.BMoveView_lineColor:
mLineColor = a.getColor(attr, Color.GRAY);
break;
case R.styleable.BMoveView_circleCenterColor:
mCircleCenterColor = a.getColor(attr, Color.GRAY);
break;
case R.styleable.BMoveView_lineDuration:
mLineDuration = a.getInt(attr,500);
break;
case R.styleable.BMoveView_lineWidth:
mLineWidth = a.getInt(attr, 5);
break;
case R.styleable.BMoveView_circleDuration:
mCircleDuration = a.getInt(attr,500);
break;
case R.styleable.BMoveView_circlemRadio:
mCirclemRadio = a.getInt(attr,500);
break;
case R.styleable.BMoveView_buttonCount:
mButonCount = a.getInt(attr,3);
break;
}
}
a.recycle();
mBoardWidth=dip2px(context,mCirclemRadio);
mRadio=dip2px(context,mLineWidth);
mPaint=new Paint();
mPaintLine = new Paint();
}
/**
* 初始化第一次的位置
* @param firstPos
* @param lastPos
*/
public void setTwoPos(int firstPos,int lastPos) {
this.firstPos = firstPos;
this.position=lastPos;
this.mRoationx = 0;
//动画的方法 (lastPos-firstPos)两次相减得到需要移动的距离
leftToRigth(lastPos - firstPos);
}
/**
* button个数
* @param butonCount
*/
public void setButonCount(int butonCount) {
mButonCount = butonCount;
}
/**
*
* @param startLineLastPosition 正为向右,负为想左,如果是1.则跨度为一,如果是2,则跨度为2;
*/
private void leftToRigth(int startLineLastPosition) {
startAnim();
startLineAnim(startLineLastPosition);
startLineEndAnim(startLineLastPosition);
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
mWidth = w;
mHeight = h;
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
//画弧度
mPaint.setColor(mCircleColor);
mPaint.setAntiAlias(true);
mPaint.setStrokeWidth(mRadio);
mPaint.setStyle(Paint.Style.STROKE);//只有边
//画圆弧的矩形位置
mRectF=new RectF(mWidth/(mButonCount*2)-mBoardWidth+position*mWidth/mButonCount,mHeight/2-mBoardWidth,mWidth/(mButonCount*2)+mBoardWidth+position*mWidth/mButonCount,mHeight/2+mBoardWidth);
canvas.drawArc(mRectF,90,mRoationx,false,mPaint);
//画圆覆盖
mPaintLine.setColor(Color.BLUE);
mPaintLine.setAntiAlias(true);
mPaintLine.setStyle(Paint.Style.FILL);
//可以画内圆圈的颜色
// canvas.drawArc(mRectF,90,mRoationx,true,mPaintLine);
//画线条
mPaintLine.setColor(mLineColor);
mPaintLine.setStrokeWidth(mRadio);
//起始和结束不同,每次动画结束位置是相同的,控制起始点和结束点
canvas.drawLine(mWidth/(mButonCount*2)+firstPos*mWidth/mButonCount+mLineEndLength,mHeight/2+mBoardWidth,mWidth/(mButonCount*2)+firstPos*mWidth/mButonCount+mLineLength,mHeight/2+mBoardWidth, mPaintLine);
}
//圆圈的动画
public void startAnim(){
ValueAnimator animator = ValueAnimator.ofInt(0,360);
animator.setDuration(mCircleDuration);
animator.setStartDelay(mCircleDuration);
animator.setInterpolator(new LinearInterpolator());
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
mRoationx = (int)animation.getAnimatedValue();
postInvalidate();
}
});
animator.start();
}
//线条开始的动画
private void startLineAnim(int startLineLastPosition){
ValueAnimator animator = ValueAnimator.ofInt(0,(mWidth/mButonCount)*startLineLastPosition);
animator.setDuration(mLineDuration);
animator.setInterpolator(new LinearInterpolator());
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
mLineLength = (int)animation.getAnimatedValue();
postInvalidate();
}
});
animator.start();
}
//线条结束的动画
private void startLineEndAnim(int startLineLastPosition){
ValueAnimator animator = ValueAnimator.ofInt(0,(mWidth/mButonCount)*startLineLastPosition);
animator.setDuration(mCircleDuration);
animator.setInterpolator(new LinearInterpolator());
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
mLineEndLength = (int)animation.getAnimatedValue();
postInvalidate();
}
});
animator.start();
}
private static int dip2px(Context context, float dpValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dpValue * scale + 0.5f);
}
}
主要代码如下
/**
* @param startLineLastPosition 正为向右,负为想左,如果是1.则跨度为一,如果是2,则跨度为2;
*/
private void leftToRigth(int startLineLastPosition) {
startAnim();
startLineAnim(startLineLastPosition);
startLineEndAnim(startLineLastPosition);
}
调用的方法
主要是传递过来的startLineLastPosition
值
//动画的方法 (lastPos-firstPos)两次相减得到需要移动的距离
leftToRigth(lastPos - firstPos);
其中lastPos - firstPos
可以得到我们需要移动的跨度是一个button还是两个button的距离,其正负数表示我们的方向,这里对以前的方法做了简化。具体的可以看动画实现。如下:
//圆圈的动画
public void startAnim(){
ValueAnimator animator = ValueAnimator.ofInt(0,360);
animator.setDuration(mCircleDuration);
animator.setStartDelay(mCircleDuration);
animator.setInterpolator(new LinearInterpolator());
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
mRoationx = (int)animation.getAnimatedValue();
postInvalidate();
}
});
animator.start();
}
//线条开始的动画
private void startLineAnim(int startLineLastPosition){
ValueAnimator animator = ValueAnimator.ofInt(0,(mWidth/mButonCount)*startLineLastPosition);
animator.setDuration(mLineDuration);
animator.setInterpolator(new LinearInterpolator());
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
mLineLength = (int)animation.getAnimatedValue();
postInvalidate();
}
});
animator.start();
}
//线条结束的动画
private void startLineEndAnim(int startLineLastPosition){
ValueAnimator animator = ValueAnimator.ofInt(0,(mWidth/mButonCount)*startLineLastPosition);
animator.setDuration(mCircleDuration);
animator.setInterpolator(new LinearInterpolator());
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
mLineEndLength = (int)animation.getAnimatedValue();
postInvalidate();
}
});
animator.start();
}
对于弧度的动画,我们为你记录了弧度由0~360的弧度,通过delay延迟得到画弧度的实现,对于移动的线条,其实很容易就得到了最后的位置,其中也记录了之前的位置,为了实现动画,通过两个线条的参数,通过ValueAnimator
动画得到不同的延迟,显示线条移动的轨迹。
下面是onDraw
的实现,
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
//画弧度
mPaint.setColor(mCircleColor);
mPaint.setAntiAlias(true);
mPaint.setStrokeWidth(mRadio);
mPaint.setStyle(Paint.Style.STROKE);//只有边
//画圆弧的矩形位置
mRectF=new RectF(mWidth/(mButonCount*2)-mBoardWidth+position*mWidth/mButonCount,mHeight/2-mBoardWidth,mWidth/(mButonCount*2)+mBoardWidth+position*mWidth/mButonCount,mHeight/2+mBoardWidth);
canvas.drawArc(mRectF,90,mRoationx,false,mPaint);
//画圆覆盖
// mPaintLine.setColor(Color.BLUE);
mPaintLine.setAntiAlias(true);
mPaintLine.setStyle(Paint.Style.FILL);
//可以画内圆圈的颜色
// canvas.drawArc(mRectF,90,mRoationx,true,mPaintLine);
//画线条
mPaintLine.setColor(mLineColor);
mPaintLine.setStrokeWidth(mRadio);
//起始和结束不同,每次动画结束位置是相同的,控制起始点和结束点
canvas.drawLine(mWidth/(mButonCount*2)+firstPos*mWidth/mButonCount+mLineEndLength,mHeight/2+mBoardWidth,mWidth/(mButonCount*2)+firstPos*mWidth/mButonCount+mLineLength,mHeight/2+mBoardWidth, mPaintLine);
}
几个变量控制,需要理解清除,一个是弧度的mRoationx
,这个由0~360度的变化。mLineEndLength
,mLineLength
,分别是线条移动的时间差,得到移动的动画效果。通过delay的连接,使它们连接起来,形成完整的动画效果。
------------------------- 特别提醒 -------------------------
解开注释
//画圆覆盖
mPaintLine.setColor(Color.BLUE);
mPaintLine.setAntiAlias(true);
mPaintLine.setStyle(Paint.Style.FILL);
//可以画内圆圈的颜色
canvas.drawArc(mRectF,90,mRoationx,true,mPaintLine);
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