Android手势识别ViewFlipper触摸动画
Android手势识别ViewFlipper触摸动画
最近项目中用到了ViewFlipper这个类,感觉效果真的很炫,今天自己也试着做了下,确实还不错。首先在layout下定义viewflipper.xml
[html]- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout xmlns:Android="http://schemas.android.com/apk/res/android"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:orientation="vertical" >
- <ViewFlipper
- android:id="@+id/viewFlipper1"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent" >
- <ImageView
- android:id="@+id/imageView1"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:src="@drawable/b" />
- <ImageView
- android:id="@+id/imageView2"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:src="@drawable/c" />
- <ImageView
- android:id="@+id/imageView3"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:src="@drawable/d" />
- <ImageView
- android:id="@+id/imageView4"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:src="@drawable/f" />
- <ImageView
- android:id="@+id/imageView5"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:src="@drawable/g" />
- </ViewFlipper>
- </LinearLayout>
[html]
- public class ViewFlipperActivity extends Activity implements OnTouchListener, android.view.GestureDetector.OnGestureListener {
- private ViewFlipper flipper;
- GestureDetector mGestureDetector;
- private int mCurrentLayoutState;
- private static final int FLING_MIN_DISTANCE = 80;
- private static final int FLING_MIN_VELOCITY = 150;
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- // TODO Auto-generated method stub
- super.onCreate(savedInstanceState);
- setContentView(R.layout.viewflipper);
- flipper=(ViewFlipper) this.findViewById(R.id.viewFlipper1);
- //注册一个用于手势识别的类
- mGestureDetector = new GestureDetector(this);
- //给mFlipper设置一个listener
- flipper.setOnTouchListener(this);
- mCurrentLayoutState = 0;
- //允许长按住ViewFlipper,这样才能识别拖动等手势
- flipper.setLongClickable(true);
- }
- /**
- * 此方法在本例中未用到,可以指定跳转到某个页面
- * @param switchTo
- */
- public void switchLayoutStateTo(int switchTo) {
- while (mCurrentLayoutState != switchTo) {
- if (mCurrentLayoutState > switchTo) {
- mCurrentLayoutState--;
- flipper.setInAnimation(inFromLeftAnimation());
- flipper.setOutAnimation(outToRightAnimation());
- flipper.showPrevious();
- } else {
- mCurrentLayoutState++;
- flipper.setInAnimation(inFromRightAnimation());
- flipper.setOutAnimation(outToLeftAnimation());
- flipper.showNext();
- }
- }
- }
- /**
- * 定义从右侧进入的动画效果
- * @return
- */
- protected Animation inFromRightAnimation() {
- Animation inFromRight = new TranslateAnimation(
- Animation.RELATIVE_TO_PARENT, +1.0f,
- Animation.RELATIVE_TO_PARENT, 0.0f,
- Animation.RELATIVE_TO_PARENT, 0.0f,
- Animation.RELATIVE_TO_PARENT, 0.0f);
- inFromRight.setDuration(200);
- inFromRight.setInterpolator(new AccelerateInterpolator());
- return inFromRight;
- }
- /**
- * 定义从左侧退出的动画效果
- * @return
- */
- protected Animation outToLeftAnimation() {
- Animation outtoLeft = new TranslateAnimation(
- Animation.RELATIVE_TO_PARENT, 0.0f,
- Animation.RELATIVE_TO_PARENT, -1.0f,
- Animation.RELATIVE_TO_PARENT, 0.0f,
- Animation.RELATIVE_TO_PARENT, 0.0f);
- outtoLeft.setDuration(200);
- outtoLeft.setInterpolator(new AccelerateInterpolator());
- return outtoLeft;
- }
- /**
- * 定义从左侧进入的动画效果
- * @return
- */
- protected Animation inFromLeftAnimation() {
- Animation inFromLeft = new TranslateAnimation(
- Animation.RELATIVE_TO_PARENT, -1.0f,
- Animation.RELATIVE_TO_PARENT, 0.0f,
- Animation.RELATIVE_TO_PARENT, 0.0f,
- Animation.RELATIVE_TO_PARENT, 0.0f);
- inFromLeft.setDuration(200);
- inFromLeft.setInterpolator(new AccelerateInterpolator());
- return inFromLeft;
- }
- /**
- * 定义从右侧退出时的动画效果
- * @return
- */
- protected Animation outToRightAnimation() {
- Animation outtoRight = new TranslateAnimation(
- Animation.RELATIVE_TO_PARENT, 0.0f,
- Animation.RELATIVE_TO_PARENT, +1.0f,
- Animation.RELATIVE_TO_PARENT, 0.0f,
- Animation.RELATIVE_TO_PARENT, 0.0f);
- outtoRight.setDuration(200);
- outtoRight.setInterpolator(new AccelerateInterpolator());
- return outtoRight;
- }
- public boolean onDown(MotionEvent e) {
- // TODO Auto-generated method stub
- return false;
- }
- /*
- * 用户按下触摸屏、快速移动后松开即触发这个事件
- * e1:第1个ACTION_DOWN MotionEvent
- * e2:最后一个ACTION_MOVE MotionEvent
- * velocityX:X轴上的移动速度,像素/秒
- * velocityY:Y轴上的移动速度,像素/秒
- * 触发条件 :
- * X轴的坐标位移大于FLING_MIN_DISTANCE,且移动速度大于FLING_MIN_VELOCITY个像素/秒
- */
- public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
- float velocityY) {
- if (e1.getX() - e2.getX() > FLING_MIN_DISTANCE
- && Math.abs(velocityX) > FLING_MIN_VELOCITY) {
- // 当像左侧滑动的时候
- //设置View进入屏幕时候使用的动画
- flipper.setInAnimation(inFromRightAnimation());
- //设置View退出屏幕时候使用的动画
- flipper.setOutAnimation(outToLeftAnimation());
- flipper.showNext();
- } else if (e2.getX() - e1.getX() > FLING_MIN_DISTANCE
- && Math.abs(velocityX) > FLING_MIN_VELOCITY) {
- // 当像右侧滑动的时候
- flipper.setInAnimation(inFromLeftAnimation());
- flipper.setOutAnimation(outToRightAnimation());
- flipper.showPrevious();
- }
- return false;
- }
- public void onLongPress(MotionEvent e) {
- // TODO Auto-generated method stub
- }
- public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
- float distanceY) {
- // TODO Auto-generated method stub
- return false;
- }
- public void onShowPress(MotionEvent e) {
- // TODO Auto-generated method stub
- }
- public boolean onSingleTapUp(MotionEvent e) {
- // TODO Auto-generated method stub
- return false;
- }
- public boolean onTouch(View v, MotionEvent event) {
- // TODO Auto-generated method stub
- // 一定要将触屏事件交给手势识别类去处理(自己处理会很麻烦的)
- return mGestureDetector.onTouchEvent(event);
- }
- }
因为是手势识别效果不太好演示,所以大家自己实现了以后就可以看到效果啦!
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