I'm quite new to android development and at the moment I'm working with a viewpager, trying to understand how I can handle touch/tap events. I've spent all morning searching for answers to this and I can't seem to find anything that helps me.
Basically I have a viewpager with 5 fragments that all use the same layout. All I want to do is be able to detect when there's a tap/touch on the stationary view (I don't want any detection to happen when a view is being dragged).
From what I gather, there seems to be an issue with the ViewPager intercepting all touch events by default. I believe this can be dealt with by using:
myPager.requestDisallowInterceptTouchEvent(true);
At first I dabbled with OnTouchListener and tried to log whether the onTouch method was ever hit - it appeared not. I've also seen the GestureDetector class thrown about a lot as a solution to this problem but frankly I feel overwhelmed and I'm not sure which classes/interfaces I should be using here.
All I'd like to do is pick up simple touch/tap events while using a ViewPager.
At the moment I'm using a modified version of the Animation tutorial code from the android developer site. This is what I have in my MainActivity.java file:
package com.example.pbinteractive;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
public class MainActivity extends FragmentActivity {
/**
* The number of pages (wizard steps) to show in this demo.
*/
private static final int NUM_PAGES = 5;
/**
* The pager widget, which handles animation and allows swiping horizontally to access previous
* and next wizard steps.
*/
private ViewPager mPager;
/**
* The pager adapter, which provides the pages to the view pager widget.
*/
private PagerAdapter mPagerAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Instantiate a ViewPager and a PagerAdapter.
mPager = (ViewPager) findViewById(R.id.pager);
mPagerAdapter = new ScreenSlidePagerAdapter(getSupportFragmentManager());
mPager.setAdapter(mPagerAdapter);
}
/**
* A simple pager adapter that represents 5 {@link ScreenSlidePageFragment} objects, in
* sequence.
*/
private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter {
public ScreenSlidePagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
return MyPageFragment.create(position);
}
@Override
public int getCount() {
return NUM_PAGES;
}
}
}
And this is what I have in my MyPageFragment.java file:
package com.example.pbinteractive;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.ViewGroup;
public class MyPageFragment extends Fragment implements OnTouchListener {
/**
* The argument key for the page number this fragment represents.
*/
public static final String ARG_PAGE = "page";
/**
* The fragment's page number, which is set to the argument value for {@link #ARG_PAGE}.
*/
private int mPageNumber;
/**
* Factory method for this fragment class. Constructs a new fragment for the given page number.
*/
public static MyPageFragment create(int pageNumber) {
MyPageFragment fragment = new MyPageFragment();
Bundle args = new Bundle();
args.putInt(ARG_PAGE, pageNumber);
fragment.setArguments(args);
return fragment;
}
public MyPageFragment() {
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mPageNumber = getArguments().getInt(ARG_PAGE);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout containing a title and body text.
ViewGroup rootView = (ViewGroup) inflater
.inflate(R.layout.fragment_slide, container, false);
// Set the title view to show the page number.
//((TextView) rootView.findViewById(android.R.id.text1)).setText(
// getString(R.string.title_template_step, mPageNumber + 1));
return rootView;
}
/**
* Returns the page number represented by this fragment object.
*/
public int getPageNumber() {
return mPageNumber;
}
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
return false;
}
}
FYI I've checked both of these resources, as they often seem to be cited as the best solution to the problem I'm facing (from what I can gather):
android: ViewPager and HorizontalScrollVIew
Fling gesture detection on grid layout
But I haven't been able to get much help from them. Like I said I'm quite new to working with android so I'd really like to just get familiar with the basics!
Thanks
EDIT: Just to clarify, I'd like to pick up the touch events within each fragment, since once I get past this hurdle I'd like some fragments to have touch events working while others will just display unresponsive content.
