Android开发仿IOS的滑动按钮

释放双眼,带上耳机,听听看~!

 

项目结构

 

 

MainActivity

 

public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}

 

activity_main.xml


<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:slideswitch="http://schemas.android.com/apk/res-auto"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context="com.example.abc.slieswitch.MainActivity">
<com.example.abc.slieswitch.SlideSwitch
android:id="@+id/swit"
android:layout_width="60dp"
android:layout_height="120dp"
slideswitch:isOpen="true"
slideswitch:shape="circle"
slideswitch:themeColor="#ff3399cc"  />
</RelativeLayout>

 


SlideSwitch.java
public class SlideSwitch extends View {
public static final int SHAPE_RECT = 1;
public static final int SHAPE_CIRCLE = 2;
private static final int RIM_SIZE = 6;
private static final int COLOR_THEME = Color.parseColor("#ff00ee00");
// 3 attributes
private int color_theme;
private boolean isOpen;
private int shape;
// varials of drawing
private Paint paint;
private Rect backRect;
private Rect frontRect;
private int alpha;
private int max_left;
private int min_left;
private int frontRect_left;
private int frontRect_left_begin = RIM_SIZE;
private int eventStartX;
private int eventLastX;
private int diffX = 0;
private SlideListener listener;
public interface SlideListener {
public void open();
public void close();
}
public SlideSwitch(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
listener = null;
paint = new Paint();
paint.setAntiAlias(true);
TypedArray a = context.obtainStyledAttributes(attrs,
R.styleable.slideswitch);
color_theme = a.getColor(R.styleable.slideswitch_themeColor,
COLOR_THEME);
isOpen = a.getBoolean(R.styleable.slideswitch_isOpen, false);
shape = a.getInt(R.styleable.slideswitch_shape, SHAPE_RECT);
a.recycle();
}
public SlideSwitch(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public SlideSwitch(Context context) {
this(context, null);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int width = measureDimension(280, widthMeasureSpec);
int height = measureDimension(140, heightMeasureSpec);
if (shape == SHAPE_CIRCLE) {
if (width < height)
width = height * 2;
}
setMeasuredDimension(width, height);
initDrawingVal();
}
public void initDrawingVal(){
int width = getMeasuredWidth();
int height = getMeasuredHeight();
backRect = new Rect(0, 0, width, height);
min_left = RIM_SIZE;
if (shape == SHAPE_RECT)
max_left = width / 2;
else
max_left = width - (height - 2 * RIM_SIZE) - RIM_SIZE;
if (isOpen) {
frontRect_left = max_left;
alpha = 255;
} else {
frontRect_left = RIM_SIZE;
alpha = 0;
}
frontRect_left_begin = frontRect_left;
}
public int measureDimension(int defaultSize, int measureSpec) {
int result;
int specMode = MeasureSpec.getMode(measureSpec);
int specSize = MeasureSpec.getSize(measureSpec);
if (specMode == MeasureSpec.EXACTLY) {
result = specSize;
} else {
result = defaultSize; // UNSPECIFIED
if (specMode == MeasureSpec.AT_MOST) {
result = Math.min(result, specSize);
}
}
return result;
}
@Override
protected void onDraw(Canvas canvas) {
if (shape == SHAPE_RECT) {
//画矩形
paint.setColor(Color.GRAY);
canvas.drawRect(backRect, paint);
paint.setColor(color_theme);
paint.setAlpha(alpha);
canvas.drawRect(backRect, paint);
frontRect = new Rect(frontRect_left, RIM_SIZE, frontRect_left
+ getMeasuredWidth() / 2 - RIM_SIZE, getMeasuredHeight()
- RIM_SIZE);
paint.setColor(Color.WHITE);
canvas.drawRect(frontRect, paint);
} else {
// 画圆形
int radius;
radius = backRect.height() / 2 - RIM_SIZE;
paint.setColor(Color.GRAY);
canvas.drawRoundRect(new RectF(backRect), radius, radius, paint);
paint.setColor(color_theme);
paint.setAlpha(alpha);
canvas.drawRoundRect(new RectF(backRect), radius, radius, paint);
frontRect = new Rect(frontRect_left, RIM_SIZE, frontRect_left
+ backRect.height() - 2 * RIM_SIZE, backRect.height()
- RIM_SIZE);
paint.setColor(Color.WHITE);
canvas.drawRoundRect(new RectF(frontRect), radius, radius, paint);
}
}
@Override
public boolean onTouchEvent(MotionEvent event) {
int action = MotionEventCompat.getActionMasked(event);
switch (action) {
case MotionEvent.ACTION_DOWN:
eventStartX = (int) event.getRawX();
break;
case MotionEvent.ACTION_MOVE:
eventLastX = (int) event.getRawX();
diffX = eventLastX - eventStartX;
int tempX = diffX + frontRect_left_begin;
tempX = (tempX > max_left ? max_left : tempX);
tempX = (tempX < min_left ? min_left : tempX);
if (tempX >= min_left && tempX <= max_left) {
frontRect_left = tempX;
alpha = (int) (255 * (float) tempX / (float) max_left);
invalidateView();
}
break;
case MotionEvent.ACTION_UP:
int wholeX = (int) (event.getRawX() - eventStartX);
frontRect_left_begin = frontRect_left;
boolean toRight;
toRight = (frontRect_left_begin > max_left / 2 ? true : false);
if (Math.abs(wholeX) < 3) {
toRight = !toRight;
}
moveToDest(toRight);
break;
default:
break;
}
return true;
}
/**
* draw again
*/
private void invalidateView() {
if (Looper.getMainLooper() == Looper.myLooper()) {
invalidate();
} else {
postInvalidate();
}
}
public void setSlideListener(SlideListener listener) {
this.listener = listener;
}
public void moveToDest(final boolean toRight) {
final Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
if (msg.what == 1) {
listener.open();
} else {
listener.close();
}
}
};
new Thread(new Runnable() {
@Override
public void run() {
if (toRight) {
while (frontRect_left <= max_left) {
alpha = (int) (255 * (float) frontRect_left / (float) max_left);
invalidateView();
frontRect_left += 3;
try {
Thread.sleep(3);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
alpha = 255;
frontRect_left = max_left;
isOpen = true;
if (listener != null)
handler.sendEmptyMessage(1);
frontRect_left_begin = max_left;
} else {
while (frontRect_left >= min_left) {
alpha = (int) (255 * (float) frontRect_left / (float) max_left);
invalidateView();
frontRect_left -= 3;
try {
Thread.sleep(3);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
alpha = 0;
frontRect_left = min_left;
isOpen = false;
if (listener != null)
handler.sendEmptyMessage(0);
frontRect_left_begin = min_left;
}
}
}).start();
}
public void setState(boolean isOpen) {
this.isOpen = isOpen;
initDrawingVal();
invalidateView();
if(listener != null)
if(isOpen == true){
listener.open();
}else{
listener.close();
}
}
public void setShapeType(int shapeType) {
this.shape = shapeType;
}
}

 

 

 

人已赞赏
Android文章

Android开发相机放大缩小的(关键代码)

2020-1-19 10:48:42

Android文章

Android开发ScrollView中嵌套ListView与GridView时滑动冲突解决方案

2020-1-19 11:02:43

个人中心
购物车
优惠劵
今日签到
有新私信 私信列表
有新消息 消息中心
搜索