android-viewpager

问题 I have an activity with a view pager and three pages to display. When ever the activity loads, only the first two pages are instantiated i.e instantiateitem in the pageradapter class is called only for position 0 and 1. Is there a way to instantiate all the three pages? 回答1: Try setOffScreenPageLimit(2). By default only one page to the left and to the right are instantiated. By setting to 2 it should instantiate your 3 pages. 来源： https://stackoverflow.com/questions/10046484/instantiate-all

问题 I have a problem using CoordinatorLayout in conjunction with ViewPager and the ViewPager: the layout does not resize correctly. Supose that the height solved includes tabs height. So when I scroll to bottom i see this: main layout code: <?xml version="1.0" encoding="utf-8"?> <android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:id="@

问题 I made a ViewPager to display images. When I advance some pages I get an java.lang.OutOfMemoryError: bitmap size exceeds VM budget error. There are more questions about this issue but I did not find the solution ( BitMap.Recycle , System.gc() etc). If you have a suggestion or solution please let me know! The PNG's are 628KB, 478KB, 587KB, 132KB, 139KB, 149KB, 585KB (crash). If you have an other solution (scroll images like pages) for me let met know! My code: package nl.ipear.vngmagazine;

问题 I've been trying to create a Camera Preview that displays a View Pager with several transparent images over the preview. But, I'm getting this error: 05-10 03:31:23.614: E/AndroidRuntime(674): FATAL EXCEPTION: main 05-10 03:31:23.614: E/AndroidRuntime(674): java.lang.NullPointerException 05-10 03:31:23.614: E/AndroidRuntime(674): at com.android.gs1.MainActivity$CameraPreview.surfaceCreated(MainActivity.java:102) 05-10 03:31:23.614: E/AndroidRuntime(674): at android.view.SurfaceView

问题 I'm trying to add/remove dynamically fragments in a ViewPager following a button click, but if I remove the fragment (a form) by clicking on back button, and add the fragment again, the form has kept its data (EditText not empty). Here is my adapter : package com.thomas.playlists.viewPager; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentPagerAdapter; import java.util.ArrayList; public class ViewPagerAdapter extends

问题 I've been trying to test how to mix all these things together and I'm having problems!! I just want an app with three tabs using the ActionBar.Tab. For example, this tabs can be movies genres Action, Adventure and Animation, the user can swipe through the tabs, so it will use the ViewPager and each tab will show a list of movies of that genre. There's no need to have three different fragments classes because all tabs will be the same format a simple list. And I'm having problems because when

问题 I create a view pager programmatically and I add this view pager into layout but it doesn't run. ViewPager viewPager = new ViewPager(this); viewPager.setAdapter(new MyPagerAdapter()); addView(viewPager); The view pager is not working; but when I use it from XML it works fine. I want to use it dynamically. 回答1: Please, post also the code of 'addView' method. Right now I would only suggest adding some layout attributes like width and height to your viewPager. UPDATE: Ok, I just encountered that

问题 My problem I am using a ViewPager to display fragments inside a FragmentActivity . ViewPager gets fragments from the attached FragmentPagerAdapter . mViewPager = (ViewPager) findViewById(R.id.view_pager); mAdapter = new HomePagerAdapter(getSupportFragmentManager()); mViewPager.setAdapter(mAdapter); Suppose ViewPager has 3 fragments to display: Fragment1 , Fragment2 , Fragment3 . Fragment1 is a grid fragment and displays a grid. Fragment2 and Fragment3 have their own content to display. When

问题 I m using Jake Wharton's example for showing viewpager indicator. www.viewpagerindicator.com I am using snap circle indicator. can anyone please tell me how to increase the width between the circles? What parameter should be changed? 回答1: We need to increase the "threeRadius" parameter to higher value. Thanks. 回答2: You can find all parameter in file res/values/vpi_attrs.xml. The style associated of CirclePageIndicator specified : <!-- Radius of the circles. This is also the spacing between

问题 Im trying to figure out how to implement Actionbar items based on the Fragment that is being loaded inside my viewpager. My code is below and im just trying to figure out the best practice for working with ABS + ViewPager + Fragments. MainActivity public class MainActivity extends SherlockFragmentActivity { private ViewPager mPager; private TitlePageIndicator mIndicator; private MainPagerAdapter mAdapter; private List<Fragment> mFragments; private static final String FRAGMENT1 = Fragment1