How to create an image slider in eclipse?
i want, when a finger moves from left to right or from right to left on imageView, I want to change the photo.
No need to do any custom thing.As Android provides the facility like this in ViewFlipper class.It is actually made for it.
View Flipper:-
Simple ViewAnimator that will animate between two or more views that
have been added to it. Only one child is shown at a time. If
requested, can automatically flip between each child at a regular
interval.
Its very nice and also built in support for animation so just use this for this purpose.
To implement the ViewFlipper in your application I am sharing some good tutorials..
http://javatechig.com/android/android-viewflipper-example
http://www.yogeshblogspot.com/android-viewflipper-example/
http://learnandroideasily.blogspot.in/2013/06/android-viewflipper-example.html
You can also get more info at here.
http://developer.android.com/reference/android/widget/ViewFlipper.html.
Enjoy..!
View Pager refer this is one option, otherwise you can add a simple gesture listener to your image view.
//Adding gesture listener to image view.
final GestureDetector gdt = new GestureDetector(new GestureListener());
final ImageView imageView = (ImageView) findViewById(R.id.image_view);
imageView.setOnTouchListener(new OnTouchListener() {
#Override
public boolean onTouch(final View view, final MotionEvent event) {
gdt.onTouchEvent(event);
return true;
}
});
//The gesture listener class
private class GestureListener extends SimpleOnGestureListener {
#Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
if(e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
//load previous image here
return false; // Right to left
} else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
//load next image here
return false; // Left to right
}
if(e1.getY() - e2.getY() > SWIPE_MIN_DISTANCE && Math.abs(velocityY) > SWIPE_THRESHOLD_VELOCITY) {
return false; // Bottom to top
} else if (e2.getY() - e1.getY() > SWIPE_MIN_DISTANCE && Math.abs(velocityY) > SWIPE_THRESHOLD_VELOCITY) {
return false; // Top to bottom
}
return false;
}
}
Related
I'm trying to add 'kinetic' move in Y-axis from top of the screen to bottom (and vice versa) to custom layout displayed above all apps using the window manager.
I tried to do it in this way:
private void animateFlingInYAxis(View view) {
FlingAnimation fling = new FlingAnimation(view, DynamicAnimation.SCROLL_Y);
fling.setStartValue(0.9F);
fling.setStartVelocity(0f);
//fling.setMinValue(0.5F);
fling.setFriction(0.2F);
fling.start();
}
But the following result is no working correctly. I tried to change values SCROLL_Y to TRANSLATION_Y and set a custom range of values but without luck.
Action is processed in ACTION_MOVE event in this way:
case MotionEvent.ACTION_MOVE:
params.y = initialY + (int) (event.getRawY() - initialTouchY);
if(isMovingInYAxis((int) initialTouchY ,(int) event.getRawY())) {
windowManager.updateViewLayout(view, params);
animateFlingInYAxis(view);
}
break;
I would like to ask how to animate moving in Y-axis in the right way?
Many thanks for any advice.
Edit1: After setting setStartVelocity(2000); seems to be working better, but the view is partially hiding (see screenshot below).
Edit2: I Implemented GestureDetector.OnGestureListener in Custom View, now I am able to catch fling and scroll events. In onFling method, I am able to recognize direction of fling gesture (TOP_BOTTOM, BOTTOM_TOP), but I am not able to to do the animation of view of given direction.
#Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
Logger.d("onFling");
if(e1.getY() - e2.getY() > SWIPE_MIN_DISTANCE && Math.abs(velocityY) > SWIPE_THRESHOLD_VELOCITY) {
Logger.d("Bottom to top");
animateFlingInYAxis(view, "BOTTOM_TOP");
return false; // Bottom to top
} else if (e2.getY() - e1.getY() > SWIPE_MIN_DISTANCE && Math.abs(velocityY) > SWIPE_THRESHOLD_VELOCITY) {
Logger.d("Top to bottom");
animateFlingInYAxis(view, "TOP_BOTTOM");
return false; // Top to bottom
}
return false;
}
private void animateFlingInYAxis(View view, String type) {
FlingAnimation fling = new FlingAnimation(view, DynamicAnimation.TRANSLATION_Y);
if(type.equals("BOTTOM_TOP")) {
fling.setStartValue(100); //WHICH PARAMS TO PASS?
fling.setMinValue(480); //WHICH PARAMS TO PASS?
fling.setMaxValue(0); //WHICH PARAMS TO PASS?
} else{
fling.setStartValue(470);
fling.setMinValue(480);
fling.setMaxValue(0);
}
fling.setStartVelocity(2000);
fling.setFriction(0.8F);
fling.start();
I have created 5 activities, each has a ListView containing only images. I have used a simple swipe animation to change activities.
Here is the relevant code:
#Override
public boolean onTouchEvent(MotionEvent event) {
if (gestureDetector.onTouchEvent(event)) {
return true;
}
return super.onTouchEvent(event);
}
private void onLeftSwipe() {
Intent intent = new Intent(HimachalActivity.this, IndianWildlifeActivity.class);
startActivity(intent);
overridePendingTransition(R.anim.slide_left_in, R.anim.slide_left_out);
}
private void onRightSwipe() {
Intent intent = new Intent(HimachalActivity.this, BaseActivity.class);
startActivity(intent);
overridePendingTransition(R.anim.slide_right_in, R.anim.slide_right_out);
}
private class SwipeGestureDetector extends GestureDetector.SimpleOnGestureListener {
// Swipe properties, you can change it to make the swipe
// longer or shorter and speed
private static final int SWIPE_MIN_DISTANCE = 120;
private static final int SWIPE_MAX_OFF_PATH = 200;
private static final int SWIPE_THRESHOLD_VELOCITY = 200;
#Override
public boolean onFling(MotionEvent e1, MotionEvent e2,
float velocityX, float velocityY) {
try {
float diffAbs = Math.abs(e1.getY() - e2.getY());
float diff = e1.getX() - e2.getX();
if (diffAbs > SWIPE_MAX_OFF_PATH)
return false;
// Left swipe
if (diff > SWIPE_MIN_DISTANCE
&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
HimachalActivity.this.onLeftSwipe();
// Right swipe
} else if (-diff > SWIPE_MIN_DISTANCE
&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
HimachalActivity.this.onRightSwipe();
}
} catch (Exception e) {
Log.e("BaseActivity", "Error on gestures");
}
return false;
}
}
The problem is that the next activity or previous activity opens only after full swipe and the animation does not feel that smooth.
I want an animation in which the next activity or previous activity starts revealing itself as soon as I start swiping. Is there any built-in animation that can be applied. If not, please point me to any relevant resources for creating one myself, possibly, one which does not require me to modify the existing code much. Thanks.
As far as I know this feature is easily available in Lollipop material design module.
I reckon, it would be easier in case you follow #Whitney 's advice. Put your fragments in view pager as described here: http://developer.android.com/training/animation/screen-slide.html
The reason it is not working with your current implementation is that the device makes sense of fling gesture only after you have flinged. Thereafter, the animation takes place. Fling is not detected in real time. In case you want to implement real time fling, you might have to override touch events as described here: http://developer.android.com/training/custom-views/making-interactive.html
I want to animate onFling events on my list view.
The animation works fine, but at the wrong row.
For example:
ListView with only one item, the animation work as expected.
ListView with two items: with the gesture is make on the first item the second one is animated and vice-versa.
ListView with three items: with the gesture is make on the first item se last one is animated , on the second item the second item is animated (as expected), on the last item the first item is animated.
CODE:
#Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
int position = listView.pointToPosition(Math.round(e1.getX()),
Math.round(e1.getY()));
View row = listView.getChildAt(position);
TranslateAnimation anim = null;
if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH || row == null)
return true;
if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE
&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
anim = new TranslateAnimation(Animation.RELATIVE_TO_SELF,1,Animation.RELATIVE_TO_SELF, 0,
Animation.RELATIVE_TO_SELF,0,Animation.RELATIVE_TO_SELF,0);
this.handleSwipe.onHandleSwipeLeft(position);
} else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE
&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
anim = new TranslateAnimation(Animation.RELATIVE_TO_SELF,-1,Animation.RELATIVE_TO_SELF, 0,
Animation.RELATIVE_TO_SELF,0,Animation.RELATIVE_TO_SELF,0);
this.handleSwipe.onHandleSwipeRight(position);
}else{
return true;
}
anim.setDuration(500);
row.startAnimation(anim);
return true;
}
OBS:
Already debug, and the position and row are always right.
I'm using api level 7.
The code work fine on android 4.2
Guilherme, probably the code:
int position = listView.pointToPosition(Math.round(e1.getX()),
Math.round(e1.getY()));
Isn't returning the row id 3. Can you confirm that?
I can make a gesture which detects a movement when the user touches the screen from left to right.
But I don't know how to make the image move along with that movement.
The purpose of this is to do a lock screen inside my application like the iPhone lock/unlock feature.
I guess I have to do something like image_swipe.setAnimate... or something.
If anyone has any idea, please let me know.
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;
#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(e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
Toast.makeText(getApplicationContext(), "Right Swipe", Toast.LENGTH_SHORT).show();
//i would like to make ImageView "image_swipe" move along with gesture
}
} catch (Exception e) {
}
return true;
}
See the below link, it may help you. The image movement when you swipe (onFling) the screen is available in this example.
CoverFlow Widget Example
I have a viewflipper which includes a number of layouts. Each layout has a scrollview as the root.
Below the viewflipper I have a horizontal scrollview which contains textviews which acts as a navigation bar.
My original issue was that the fling stopped working as soon as I added a scrollview but I added the following code:
#Override
public boolean dispatchTouchEvent(MotionEvent ev){
super.dispatchTouchEvent(ev);
return gestureDetector.onTouchEvent(ev);
}
And the scrolling now works along with the fling.
The only issue I have now though is that the HSV nav bar now acts a little strange. Sometimes when I try to slide it across, to select new contents, the HSV springs back to where it was. Other times the HSV thinks I want to fling and moves to the next contents. This is of course dependant of the speed I try to scroll it.
I want the nav bar to work independently of the flipper.
I'm trying to understand the code to fix it myself but not getting anywhere.
I have the following in my onCreate:
gestureDetector = new GestureDetector(new MyGestureDetector());
gestureListener = new View.OnTouchListener() {
public boolean onTouch(View v, MotionEvent event) {
if (gestureDetector.onTouchEvent(event)) {
return true;
}
return false;
}};
I have the MyGestureDetector class:
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) {
flipper.setInAnimation(flip_in_from_right);
flipper.setOutAnimation(flip_out_to_left);
flipper.showNext();
} else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
flipper.setInAnimation(flip_in_from_left);
flipper.setOutAnimation(flip_out_to_right);
flipper.showPrevious();
}
} catch (Exception e) {
// nothing
}
And then the override:
#Override
public boolean dispatchTouchEvent(MotionEvent ev){
super.dispatchTouchEvent(ev);
return gestureDetector.onTouchEvent(ev);
}
Can anyone shed any light on this?
Where exactly is your HSV? Is it pinned to the bottom of the screen? If so, here's what I would do. Within your onFling event, check the Y position of the fling and make sure it's not within your HSV. If it is, then return false and you should be good to go.