我有一个Android应用程序,其中有List View就像这个
现在我想以相同的方式对列表项的右/左滑动执行两个不同的活动本机呼叫日志的工作方式
右键清单
我想要这种类型的滑动。任何人都可以知道如何实现它。基本上我想实现SimpleOnGestureListener
。
我已经阅读了 sir gav Fling gesture detection on grid layout回复的帖子,之后我成功实现了左滑动和右滑动检测,但我唯一没有得到哪个列表项滑动已经发生。
更新 2013年5月24日
现在我可以使用此代码检测滑动操作 -
SwipeDetector.java
/**
* Class swipe detection to View
*/
public class SwipeDetector implements View.OnTouchListener {
public static enum Action {
LR, // Left to right
RL, // Right to left
TB, // Top to bottom
BT, // Bottom to top
None // Action not found
}
private static final int HORIZONTAL_MIN_DISTANCE = 30; // The minimum
// distance for
// horizontal swipe
private static final int VERTICAL_MIN_DISTANCE = 80; // The minimum distance
// for vertical
// swipe
private float downX, downY, upX, upY; // Coordinates
private Action mSwipeDetected = Action.None; // Last action
public boolean swipeDetected() {
return mSwipeDetected != Action.None;
}
public Action getAction() {
return mSwipeDetected;
}
/**
* Swipe detection
*/@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
{
downX = event.getX();
downY = event.getY();
mSwipeDetected = Action.None;
return false; // allow other events like Click to be processed
}
case MotionEvent.ACTION_MOVE:
{
upX = event.getX();
upY = event.getY();
float deltaX = downX - upX;
float deltaY = downY - upY;
// horizontal swipe detection
if (Math.abs(deltaX) > HORIZONTAL_MIN_DISTANCE) {
// left or right
if (deltaX < 0) {
mSwipeDetected = Action.LR;
return true;
}
if (deltaX > 0) {
mSwipeDetected = Action.RL;
return true;
}
} else
// vertical swipe detection
if (Math.abs(deltaY) > VERTICAL_MIN_DISTANCE) {
// top or down
if (deltaY < 0) {
mSwipeDetected = Action.TB;
return false;
}
if (deltaY > 0) {
mSwipeDetected = Action.BT;
return false;
}
}
return true;
}
}
return false;
}
}
现在以这种方式将它与ListView一起使用
// Set the touch listener
final SwipeDetector swipeDetector = new SwipeDetector();
lv.setOnTouchListener(swipeDetector);
在setOnItemClickListener
中,您可以检测到这些滑动事件
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView <? > parent, View view,
int position, long id) {
if (swipeDetector.swipeDetected()) {
if (swipeDetector.getAction() == SwipeDetector.Action.LR) {
Toast.makeText(getApplicationContext(),
"Left to right", Toast.LENGTH_SHORT).show();
}
if (swipeDetector.getAction() == SwipeDetector.Action.RL) {
Toast.makeText(getApplicationContext(),
"Right to left", Toast.LENGTH_SHORT).show();
}
}
}
});
但我仍然无法像这样滑动动画:
答案 0 :(得分:13)
OnSwipeTouchListener.java:
import android.view.GestureDetector;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
public class OnSwipeTouchListener implements OnTouchListener {
private final GestureDetector gestureDetector = new GestureDetector(new GestureListener());
public boolean onTouch(final View view, final MotionEvent motionEvent) {
super.onTouch(view, motionEvent);
return gestureDetector.onTouchEvent(motionEvent);
}
private final class GestureListener extends SimpleOnGestureListener {
private static final int SWIPE_THRESHOLD = 100;
private static final int SWIPE_VELOCITY_THRESHOLD = 100;
@Override
public boolean onDown(MotionEvent e) {
return true;
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
boolean result = false;
try {
float diffY = e2.getY() - e1.getY();
float diffX = e2.getX() - e1.getX();
if (Math.abs(diffX) > Math.abs(diffY)) {
if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
if (diffX > 0) {
onSwipeRight();
} else {
onSwipeLeft();
}
}
} else {
if (Math.abs(diffY) > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {
if (diffY > 0) {
onSwipeBottom();
} else {
onSwipeTop();
}
}
}
} catch (Exception exception) {
exception.printStackTrace();
}
return result;
}
}
public void onSwipeRight() {}
public void onSwipeLeft() {}
public void onSwipeTop() {}
public void onSwipeBottom() {}
}
用法:
imageView.setOnTouchListener(new OnSwipeTouchListener() {
public void onSwipeTop() {
Toast.makeText(MyActivity.this, "top", Toast.LENGTH_SHORT).show();
}
public void onSwipeRight() {
Toast.makeText(MyActivity.this, "right", Toast.LENGTH_SHORT).show();
}
public void onSwipeLeft() {
Toast.makeText(MyActivity.this, "left", Toast.LENGTH_SHORT).show();
}
public void onSwipeBottom() {
Toast.makeText(MyActivity.this, "bottom", Toast.LENGTH_SHORT).show();
}
});
答案 1 :(得分:1)
您可以将Fragments用于此要求。使用FragmentPagerAdapter并覆盖getItem(int position),它将返回片段。 将适配器设置为viewPager,在setOnPageChangeListener中,您可以拥有调用不同片段的逻辑。
Shrishail