public class SwitchView extends LinearLayout {

private ImageView maskImage;              // 开关遮盖图片

private boolean open;                     // 开关当前状态

private boolean isAninFinish = true;      // 动画是否结束

private float x;                          // 记录ACTION_DOWN时候的横坐标

private boolean isChangedByTouch = false; // 是否在一次事件中已经切换过状态

private OnSwitchChangeListener switchChangeListener; // 监控开关状态

public interface OnSwitchChangeListener {

void onSwitchChanged(boolean open);

}

public SwitchView(Context context, AttributeSet attrs) {

super(context, attrs);

init();

}

public SwitchView(Context context) {

super(context);

init();

}

private void init() {

setBackgroundResource(R.drawable.switch_bg);

maskImage = new ImageView(getContext());

maskImage.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));

maskImage.setImageResource(R.drawable.switch_mask);

addView(maskImage);

}

public boolean getSwitchStatus() {

return open;

}

public void setSwitchStatus(boolean isOpen) {

this.open = isOpen;

if (isOpen) {

setGravity(Gravity.RIGHT);

} else {

setGravity(Gravity.LEFT);

}

}

@Override

public boolean onTouchEvent(MotionEvent event) {

switch (event.getAction()) {

case MotionEvent.ACTION_DOWN: {

x = event.getX();

break;

}

case MotionEvent.ACTION_MOVE: {

if (event.getX() - x > 5 && !open) { // 向右

changeStatus();

} else if (event.getX() - x 

changeStatus();

}

break;

}

case MotionEvent.ACTION_UP: {

if (Math.abs(event.getX() - x) <= 5) {

changeStatus();

}

isChangedByTouch = false;

break;

}

case MotionEvent.ACTION_CANCEL: {

isChangedByTouch = false;

break;

}

}

return true;

}

private void changeStatus() {

if (isAninFinish && !isChangedByTouch) {

isChangedByTouch = true;

open = !open;

isAninFinish = false;

if (switchChangeListener != null) {

switchChangeListener.onSwitchChanged(open);

}

changeOpenStatusWithAnim(open);

}

}

private void changeOpenStatusWithAnim(boolean open) {

if (open) {

// 左到右

Animation leftToRight = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 0,

Animation.ABSOLUTE, getWidth() - maskImage.getWidth(),

Animation.RELATIVE_TO_SELF, 0,

Animation.RELATIVE_TO_SELF, 0);

leftToRight.setDuration(300);

leftToRight.setAnimationListener(new AnimationListener() {

@Override

public void onAnimationStart(Animation animation) {

}

@Override

public void onAnimationRepeat(Animation animation) {

}

@Override

public void onAnimationEnd(Animation animation) {

maskImage.clearAnimation();

setGravity(Gravity.RIGHT);

isAninFinish = true;

}

});

maskImage.startAnimation(leftToRight);

} else {

// 右到左

Animation rightToLeft = new TranslateAnimation(Animation.RELATIVE_TO_SELF, 0,

Animation.ABSOLUTE, maskImage.getWidth() - getWidth(),

Animation.RELATIVE_TO_SELF, 0,

Animation.RELATIVE_TO_SELF, 0);

rightToLeft.setDuration(300);

rightToLeft.setAnimationListener(new AnimationListener() {

@Override

public void onAnimationStart(Animation animation) {

}

@Override

public void onAnimationRepeat(Animation animation) {

}

@Override

public void onAnimationEnd(Animation animation) {

maskImage.clearAnimation();

setGravity(Gravity.LEFT);

isAninFinish = true;

}

});

maskImage.startAnimation(rightToLeft);

}

}

public OnSwitchChangeListener getSwitchChangeListener() {

return switchChangeListener;

}

public void setOnSwitchChangeListener(OnSwitchChangeListener switchChangeListener) {

this.switchChangeListener = switchChangeListener;

}

}