我正在实现一个扩展SimpleOnGestureListener的MyGestureDetector.我从
http://www.codeshogun.com/blog/tag/view-flipper/借用了这个类,允许在ViewFlipper中进行滑动操作.我无法在模拟器上运行.有什么建议?
以下是所有代码:
main.java
- import android.app.Activity;
- import android.os.Bundle;
- import android.view.GestureDetector;
- import android.view.KeyEvent;
- import android.view.MotionEvent;import android.view.View;
- import android.view.GestureDetector.SimpleOnGestureListener;
- import android.view.animation.Animation;
- import android.view.animation.AnimationUtils;
- import android.webkit.WebView;
- import android.widget.ViewFlipper;
- public class main extends Activity {
- private static final int SWIPE_MIN_DISTANCE = 120;
- private static final int SWIPE_MAX_OFF_PATH = 250;
- private static final int SWIPE_THRESHOLD_VELOCITY = 200;
- private GestureDetector gestureDetector;
- View.OnTouchListener gestureListener;
- private Animation slideLeftIn;
- private Animation slideLeftOut;
- private Animation slideRightIn;
- private Animation slideRightOut;
- private ViewFlipper viewFlipper;
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- // ---------------------------------Sets Swipe Animation to Next View -->
- viewFlipper = (ViewFlipper)findViewById(R.id.AC4313);
- slideLeftIn = AnimationUtils.loadAnimation(this,R.anim.slide_left_in);
- slideLeftOut = AnimationUtils.loadAnimation(this,R.anim.slide_left_out);
- slideRightIn = AnimationUtils.loadAnimation(this,R.anim.slide_right_in);
- slideRightOut = AnimationUtils.loadAnimation(this,R.anim.slide_right_out);
- gestureDetector = new GestureDetector(new MyGestureDetector());
- gestureListener = new View.OnTouchListener() {
- public boolean onTouch(View v,MotionEvent event) {
- if (gestureDetector.onTouchEvent(event)) {
- return true;
- }
- return false;
- }
- };
- }
- class MyGestureDetector extends SimpleOnGestureListener {
- @Override
- public boolean onFling(MotionEvent e1,MotionEvent e2,float velocityX,float velocityY) {
- try {
- if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH)
- return false;
- // right to left swipe
- if(e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
- viewFlipper.setInAnimation(slideLeftIn);
- viewFlipper.setOutAnimation(slideLeftOut);
- viewFlipper.showNext();
- } else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
- viewFlipper.setInAnimation(slideRightIn);
- viewFlipper.setOutAnimation(slideRightOut);
- viewFlipper.showPrevIoUs();
- }
- } catch (Exception e) {
- // nothing
- }
- return false;
- }
- }
- @Override // ------------------------------ Catch the Gesture Event by Overriding onTouch() method: -->
- public boolean onTouchEvent(MotionEvent event) {
- if (gestureDetector.onTouchEvent(event))
- return true;
- else
- return false;
- }
动画* .xml的:
- <?xml version="1.0" encoding="utf-8"?>
- <set xmlns:android="http://schemas.android.com/apk/res/android">
- <translate android:fromXDelta="100%p" android:toXDelta="0" android:duration="800"/>
- </set>