I have an Android application in which there is List View Like this one
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
Right Swipe of list
I want this type of swipes. Can anyone know how to make it happen. Basically I wan to implement SimpleOnGestureListener.
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.
Update 24 May 2013
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;
}
}
Now use it with your ListView in this fashion
// Set the touch listener
final SwipeDetector swipeDetector = new SwipeDetector();
lv.setOnTouchListener(swipeDetector);
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();
}
}
}
});
But still I am not able to animate the swipe like these:
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() {}
}
USAGE:
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();
}
});
you can use Fragments for this requirement. Use FragmentPagerAdapter and overide getItem(int position) which will return you the fragment. set the adapter to viewPager and in the setOnPageChangeListener you can have the logic for calling different fragment.
Shrishail
来源：https://stackoverflow.com/questions/16017988/android-list-view-right-left-swipes-like-call-logs