Android 列表视图向右/向左滑动，如通话记录 [英] Android list view Right / Left swipes like call logs
问题描述
我有一个 Android 应用程序，其中有像这样的列表视图
I have an Android application in which there is List View Like this one
现在我想以同样的方式在列表项的右/左滑动上执行两个不同的活动原生通话记录的工作原理
Now I want to perform two different activities on right/Left swipe of the List Items in the same way How native call log works
向右滑动列表
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.
I want this type of swipes. Can anyone know how to make it happen. Basically I wan to implement SimpleOnGestureListener.
我读过 sir gav 回答的帖子 网格上的投掷手势检测布局 之后，我成功地实现了向左滑动和向右滑动检测，但唯一没有得到的是发生了滑动的列表项.
I have read a post answered by sir gav Fling gesture detection on grid layout and after that I am successful in implementing left swipe and right swipe detection but the only thing I am not getting on which List Item the swipe has occurred.
更新 2013 年 5 月 24 日
Update 24 May 2013
现在我可以使用此代码检测滑动操作 --
Now I am able to detect swipe action using this code --
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您的 ListView 一起使用
Now use it with your ListView in this fashion
// Set the touch listener
final SwipeDetector swipeDetector = new SwipeDetector();
lv.setOnTouchListener(swipeDetector);
在您的 setOnItemClickListener 中，您可以检测这样的滑动事件
In your setOnItemClickListener you can detect the swipe events like these
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为滑动设置动画:
But still I am not able to animate the swipe like these:
推荐答案
OnSwipeTouchListener.java:
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();
}
});
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