我对Android开发很新,目前我正在使用viewpager,试图了解我如何处理触摸/点击事件。我整个上午都在寻找答案,我似乎找不到任何可以帮助我的事情。
基本上我有一个包含5个片段的viewpager,它们都使用相同的布局。我想做的就是能够检测静止视图上的敲击/触摸时间(我不希望在拖动视图时发生任何检测)。
从我收集的内容来看,ViewPager默认拦截所有触摸事件似乎存在问题。我相信这可以通过使用:
来解决myPager.requestDisallowInterceptTouchEvent(true);
起初我涉足OnTouchListener并尝试记录onTouch方法是否被击中 - 它似乎没有。我也看到GestureDetector类作为这个问题的解决方案被抛出很多但是坦率地说我感到不知所措,我不确定我应该在这里使用哪些类/接口。
我想做的就是在使用ViewPager时选择简单的触摸/点击事件。
目前我正在使用Android开发者网站的动画教程代码的修改版本。这就是我在 MainActivity.java 文件中的内容:
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;
}
}
}
这就是我在 MyPageFragment.java 文件中的内容:
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;
}
}
仅供参考我已经检查了这两种资源,因为它们似乎经常被认为是我面临的问题的最佳解决方案(从我可以收集的内容):
android: ViewPager and HorizontalScrollVIew
Fling gesture detection on grid layout
但我无法得到他们的帮助。就像我说我对使用android很新,所以我真的很想熟悉基础知识!
由于
编辑:为了澄清,我想在每个片段中选择触摸事件,因为一旦我遇到这个障碍,我会想要一些片段来触摸事件,而其他只会显示无响应的内容。
答案 0 :(得分:8)
@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);
LinearLayout layout = (LinearLayout)rootView.findViewById(R.id.layout)// get your root layout
layout.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
Log.v(null, "TOUCH EVENT"); // handle your fragment number here
return false;
}
});
return rootView;
}