如何在不同情况下使用fragmentAdapter接收不同的片段
[英]How to use fragmentAdapter to recieve different fragments in different situations
问题描述
我有一个活动，即时通讯试图实现一个viewpager。 问题在于每个情况可以显示不同数量的片段和屏幕。
基本上在我当前的项目中，对象可以包含4个数据项，每个数据项对应一个不同的片段。
例如，如果我有数据项1、3和4，而缺少2，则滑动需要从一转到3，则4，而向后滑动则需要4,3,1
所以我写了getCount方法以确保我有多少，并且我使用地图来浏览列表并确保它们被正确映射。 但是，应用程序本身会出错，并显示与所需内容不同的片段。 我想知道我缺少什么，还有更好的方法吗？
public DemoFragmentAdapter(FragmentManager fm, MYObject currentObject) {
super(fm);
set_currentObject(currentObject);
createItemConvertionMap();
}
@Override
public int getCount() {
int count=0;
if (_currentObject.get_type1()!=null&&_currentObject.get_type1().isEmpty()==false)
{
count++;
}
if (_currentObject.get_type2()!=null&&
_currentObject.get_type2().isEmpty()==false)
{
count++;
}
if (_currentObject.get_type3()!=null&&
_currentObject.get_type3().isEmpty()==false)
{
count++;
}
if (_currentObject.get_type4()!=null&&_currentObject.get_type4().isEmpty()==false)
{
count++;
}
Log.d(MyApplication.LOG_TAG,"fragment adaprter - count:\n"+count);
return count;
}
public void createItemConvertionMap() {
_convertionMap=new HashMap<>();
int i=0;
if (_currentObject.get_type1()!=null&&_currentObject.get_type1().isEmpty()==false)
{
_convertionMap.put(i, TYPE1);
i++;
}
if (_currentObject.get_type2()!=null&&
_currentObject.get_type2().isEmpty()==false)
{
_convertionMap.put(i, TYPE2);
i++;
}
if (_currentObject.get_type3()!=null&&
_currentObject.get_type3().isEmpty()==false)
{
_convertionMap.put(i, TYPE3);
i++;
}
if (_currentObject.get_type4()!=null&&_currentObject.get_type4().isEmpty()==false)
{
_convertionMap.put(i, TYPE4);
i++;
}
}
@Override
public Fragment getItem(int i) {
Fragment fragment=new FragmentType1();//default
Bundle args = new Bundle();
int fragmentItem=get_convertionMap().get(i);
Log.d(MyApplication.LOG_TAG,"fragment adaprter - item key requested:"+i +" item convertion is:"+fragmentItem);
switch (fragmentItem) {
case TYPE1:
Log.d(MyApplication.LOG_TAG,"fragment adaprter - returning TYPE1 fragment");
fragment=new FragmenType1();
break;
case TYPE2:
Log.d(MyApplication.LOG_TAG,"fragment adaprter - returning TYPE2fragment");
fragment=new FragmentType2();
break;
case TYPE3:
Log.d(MyApplication.LOG_TAG,"fragment adaprter - returning TYPE3 fragment");
fragment=new FragmentType3();
break;
case TYPE4:
Log.d(MyApplication.LOG_TAG,"fragment adaprter - returning TYPE 4 fragment");
fragment=new FragmentType4();
break;
default:
Log.d(MyApplication.LOG_TAG,"fragment adaprter - an error with returend converted item returning default fragment");
break;
}
// TODO finish object bundle
args.putInt(MyActivity.ARG_OBJECT, i + 1);
fragment.setArguments(args);
return fragment;
}
激活后的第一个对象的日志显示很好，它有2个数据项，第二个都正确地工作了，它有3个数据项，但是当pagar通过它们时，它变为TYPE1，TYPE4，TYPE4而不是TYPE1，TYPE2，TYPE4：
03-17 15:05:16.482: D/GABI(955): fragment adaprter - count:
03-17 15:05:16.482: D/GABI(955): 2
03-17 15:05:16.492: D/GABI(955): fragment adaprter - count:
03-17 15:05:16.492: D/GABI(955): 2
03-17 15:05:16.494: D/GABI(955): fragment adaprter - item key requested:0 item convertion is:0
03-17 15:05:16.494: D/GABI(955): fragment adaprter - returning TYPE1 fragment
03-17 15:05:16.494: D/GABI(955): fragment adaprter - item key requested:1 item convertion is:3
03-17 15:05:16.494: D/GABI(955): fragment adaprter - returning TYPE4 fragment
03-17 15:05:16.494: D/GABI(955): fragment adaprter - count:
03-17 15:05:16.494: D/GABI(955): 2
03-17 15:05:16.550: D/GABI(955): fragment adaprter - count:
03-17 15:05:16.550: D/GABI(955): 2
03-17 15:05:16.588: D/GABI(955): fragment adaprter - count:
03-17 15:05:16.588: D/GABI(955): 2
03-17 15:05:16.588: D/GABI(955): fragment adaprter - count:
03-17 15:05:16.588: D/GABI(955): 2
03-17 15:05:16.589: D/GABI(955): fragment adaprter - count:
03-17 15:05:16.589: D/GABI(955): 2
03-17 15:05:43.133: D/GABI(955): fragment adaprter - count:
03-17 15:05:43.133: D/GABI(955): 2
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03-17 15:05:43.134: D/GABI(955): 2
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03-17 15:05:43.134: D/GABI(955): 2
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03-17 15:05:43.160: D/GABI(955): 2
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03-17 15:05:43.177: D/GABI(955): 2
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03-17 15:05:43.194: D/GABI(955): 2
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03-17 15:05:43.195: D/GABI(955): 2
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03-17 15:05:43.197: D/GABI(955): 2
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03-17 15:05:43.210: D/GABI(955): 2
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03-17 15:05:43.210: D/GABI(955): 2
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03-17 15:05:43.212: D/GABI(955): 2
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03-17 15:05:43.245: D/GABI(955): 2
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03-17 15:05:43.245: D/GABI(955): 2
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03-17 15:05:43.246: D/GABI(955): 2
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03-17 15:05:43.273: D/GABI(955): 2
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03-17 15:05:43.273: D/GABI(955): 2
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03-17 15:05:43.274: D/GABI(955): 2
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03-17 15:05:43.279: D/GABI(955): 2
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03-17 15:05:43.294: D/GABI(955): 2
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03-17 15:05:43.311: D/GABI(955): 2
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03-17 15:05:43.326: D/GABI(955): 2
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03-17 15:05:43.343: D/GABI(955): 2
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03-17 15:05:43.360: D/GABI(955): 2
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03-17 15:05:43.376: D/GABI(955): 2
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03-17 15:05:43.393: D/GABI(955): 2
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03-17 15:05:43.410: D/GABI(955): 2
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03-17 15:05:43.426: D/GABI(955): 2
03-17 15:05:43.443: D/GABI(955): fragment adaprter - count:
03-17 15:05:43.443: D/GABI(955): 2
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03-17 15:05:43.459: D/GABI(955): 2
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03-17 15:05:43.476: D/GABI(955): 2
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03-17 15:05:43.493: D/GABI(955): 2
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03-17 15:05:43.509: D/GABI(955): 2
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03-17 15:05:43.527: D/GABI(955): 2
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03-17 15:05:43.543: D/GABI(955): 2
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03-17 15:05:43.560: D/GABI(955): 2
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03-17 15:05:43.577: D/GABI(955): 2
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03-17 15:05:43.593: D/GABI(955): 2
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03-17 15:05:43.610: D/GABI(955): 2
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03-17 15:05:43.627: D/GABI(955): 2
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03-17 15:05:43.643: D/GABI(955): 2
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03-17 15:05:43.660: D/GABI(955): 2
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03-17 15:05:43.677: D/GABI(955): 2
03-17 15:05:43.694: D/GABI(955): fragment adaprter - count:
03-17 15:05:43.694: D/GABI(955): 2
03-17 15:05:43.710: D/GABI(955): fragment adaprter - count:
03-17 15:05:43.710: D/GABI(955): 2
03-17 15:05:43.727: D/GABI(955): fragment adaprter - count:
03-17 15:05:43.727: D/GABI(955): 2
03-17 15:05:43.744: D/GABI(955): fragment adaprter - count:
03-17 15:05:43.744: D/GABI(955): 2
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03-17 15:05:43.760: D/GABI(955): 2
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03-17 15:05:43.777: D/GABI(955): 2
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03-17 15:05:43.794: D/GABI(955): 2
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03-17 15:05:43.810: D/GABI(955): 2
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03-17 15:05:43.828: D/GABI(955): 2
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03-17 15:05:43.845: D/GABI(955): 2
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03-17 15:05:43.860: D/GABI(955): 2
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03-17 15:05:43.861: D/GABI(955): 2
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03-17 15:05:45.112: D/GABI(955): 2
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03-17 15:05:45.112: D/GABI(955): 2
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03-17 15:05:45.112: D/GABI(955): 2
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03-17 15:05:45.147: D/GABI(955): 2
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03-17 15:05:45.164: D/GABI(955): 2
03-17 15:05:45.180: D/GABI(955): fragment adaprter - count:
03-17 15:05:45.180: D/GABI(955): 2
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03-17 15:05:45.180: D/GABI(955): 2
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03-17 15:05:45.182: D/GABI(955): 2
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03-17 15:05:45.198: D/GABI(955): 2
03-17 15:05:45.199: D/GABI(955): fragment adaprter - count:
03-17 15:05:45.199: D/GABI(955): 2
03-17 15:05:45.200: D/GABI(955): fragment adaprter - count:
03-17 15:05:45.200: D/GABI(955): 2
03-17 15:05:45.214: D/GABI(955): fragment adaprter - count:
03-17 15:05:45.214: D/GABI(955): 2
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03-17 15:05:45.214: D/GABI(955): 2
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03-17 15:05:45.216: D/GABI(955): 2
03-17 15:05:45.243: D/GABI(955): fragment adaprter - count:
03-17 15:05:45.243: D/GABI(955): 2
03-17 15:05:45.243: D/GABI(955): fragment adaprter - count:
03-17 15:05:45.243: D/GABI(955): 2
03-17 15:05:45.244: D/GABI(955): fragment adaprter - count:
03-17 15:05:45.244: D/GABI(955): 2
03-17 15:05:45.251: D/GABI(955): fragment adaprter - count:
03-17 15:05:45.251: D/GABI(955): 2
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03-17 15:05:45.251: D/GABI(955): 2
03-17 15:05:45.252: D/GABI(955): fragment adaprter - count:
03-17 15:05:45.252: D/GABI(955): 2
03-17 15:05:45.264: D/GABI(955): fragment adaprter - count:
03-17 15:05:45.264: D/GABI(955): 2
03-17 15:05:45.264: D/GABI(955): fragment adaprter - count:
03-17 15:05:45.264: D/GABI(955): 2
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03-17 15:05:45.265: D/GABI(955): 2
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03-17 15:05:45.280: D/GABI(955): 2
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03-17 15:05:45.281: D/GABI(955): 2
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03-17 15:05:45.281: D/GABI(955): 2
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03-17 15:05:45.297: D/GABI(955): 2
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03-17 15:05:45.298: D/GABI(955): 2
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03-17 15:05:45.316: D/GABI(955): 2
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03-17 15:05:45.348: D/GABI(955): 2
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03-17 15:05:45.766: D/GABI(955): fragment adaprter - count:
03-17 15:05:45.766: D/GABI(955): 2
03-17 15:05:45.783: D/GABI(955): fragment adaprter - count:
03-17 15:05:45.783: D/GABI(955): 2
03-17 15:05:45.799: D/GABI(955): fragment adaprter - count:
03-17 15:05:45.799: D/GABI(955): 2
03-17 15:05:45.816: D/GABI(955): fragment adaprter - count:
03-17 15:05:45.816: D/GABI(955): 2
03-17 15:05:45.833: D/GABI(955): fragment adaprter - count:
03-17 15:05:45.833: D/GABI(955): 2
03-17 15:05:45.850: D/GABI(955): fragment adaprter - count:
03-17 15:05:45.850: D/GABI(955): 2
03-17 15:05:45.867: D/GABI(955): fragment adaprter - count:
03-17 15:05:45.867: D/GABI(955): 2
03-17 15:05:45.883: D/GABI(955): fragment adaprter - count:
03-17 15:05:45.883: D/GABI(955): 2
03-17 15:05:45.899: D/GABI(955): fragment adaprter - count:
03-17 15:05:45.899: D/GABI(955): 2
03-17 15:05:45.916: D/GABI(955): fragment adaprter - count:
03-17 15:05:45.916: D/GABI(955): 2
03-17 15:05:45.933: D/GABI(955): fragment adaprter - count:
03-17 15:05:45.933: D/GABI(955): 2
03-17 15:05:45.949: D/GABI(955): fragment adaprter - count:
03-17 15:05:45.949: D/GABI(955): 2
03-17 15:05:45.966: D/GABI(955): fragment adaprter - count:
03-17 15:05:45.966: D/GABI(955): 2
03-17 15:05:51.150: D/GABI(955): fragment adaprter - count:
03-17 15:05:51.150: D/GABI(955): 2
03-17 15:05:51.150: D/GABI(955): fragment adaprter - count:
03-17 15:05:51.150: D/GABI(955): 2
03-17 15:05:51.150: D/GABI(955): fragment adaprter - count:
03-17 15:05:51.150: D/GABI(955): 2
03-17 15:05:51.150: D/GABI(955): fragment adaprter - count:
03-17 15:05:51.150: D/GABI(955): 2
03-17 15:05:51.165: D/GABI(955): fragment adaprter - count:
03-17 15:05:51.165: D/GABI(955): 3
03-17 15:05:51.170: D/GABI(955): fragment adaprter - count:
03-17 15:05:51.170: D/GABI(955): 3
03-17 15:05:51.170: D/GABI(955): fragment adaprter - count:
03-17 15:05:51.170: D/GABI(955): 3
03-17 15:05:51.186: D/GABI(955): fragment adaprter - count:
03-17 15:05:51.186: D/GABI(955): 3
03-17 15:05:51.186: D/GABI(955): fragment adaprter - count:
03-17 15:05:51.186: D/GABI(955): 3
03-17 15:05:51.258: D/GABI(955): fragment adaprter - count:
03-17 15:05:51.258: D/GABI(955): 3
03-17 15:05:51.272: D/GABI(955): fragment adaprter - count:
03-17 15:05:51.272: D/GABI(955): 3
03-17 15:05:51.272: D/GABI(955): fragment adaprter - count:
03-17 15:05:51.272: D/GABI(955): 3
03-17 15:05:51.273: D/GABI(955): fragment adaprter - count:
03-17 15:05:51.273: D/GABI(955): 3
03-17 15:05:52.996: D/GABI(955): fragment adaprter - count:
03-17 15:05:52.996: D/GABI(955): 3
03-17 15:05:52.996: D/GABI(955): fragment adaprter - count:
03-17 15:05:52.996: D/GABI(955): 3
03-17 15:05:52.996: D/GABI(955): fragment adaprter - count:
03-17 15:05:52.996: D/GABI(955): 3
03-17 15:05:53.017: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.017: D/GABI(955): 3
03-17 15:05:53.034: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.034: D/GABI(955): 3
03-17 15:05:53.051: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.051: D/GABI(955): 3
03-17 15:05:53.051: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.051: D/GABI(955): 3
03-17 15:05:53.053: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.053: D/GABI(955): 3
03-17 15:05:53.067: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.067: D/GABI(955): 3
03-17 15:05:53.067: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.067: D/GABI(955): 3
03-17 15:05:53.069: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.069: D/GABI(955): 3
03-17 15:05:53.084: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.084: D/GABI(955): 3
03-17 15:05:53.084: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.084: D/GABI(955): 3
03-17 15:05:53.086: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.086: D/GABI(955): 3
03-17 15:05:53.100: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.100: D/GABI(955): 3
03-17 15:05:53.100: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.100: D/GABI(955): 3
03-17 15:05:53.101: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.101: D/GABI(955): 3
03-17 15:05:53.106: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.106: D/GABI(955): 3
03-17 15:05:53.106: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.106: D/GABI(955): 3
03-17 15:05:53.106: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.106: D/GABI(955): 3
03-17 15:05:53.117: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.117: D/GABI(955): 3
03-17 15:05:53.134: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.134: D/GABI(955): 3
03-17 15:05:53.151: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.151: D/GABI(955): 3
03-17 15:05:53.168: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.168: D/GABI(955): 3
03-17 15:05:53.184: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.184: D/GABI(955): 3
03-17 15:05:53.201: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.201: D/GABI(955): 3
03-17 15:05:53.218: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.218: D/GABI(955): 3
03-17 15:05:53.234: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.234: D/GABI(955): 3
03-17 15:05:53.251: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.251: D/GABI(955): 3
03-17 15:05:53.268: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.268: D/GABI(955): 3
03-17 15:05:53.284: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.284: D/GABI(955): 3
03-17 15:05:53.301: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.301: D/GABI(955): 3
03-17 15:05:53.318: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.318: D/GABI(955): 3
03-17 15:05:53.335: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.335: D/GABI(955): 3
03-17 15:05:53.351: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.351: D/GABI(955): 3
03-17 15:05:53.368: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.368: D/GABI(955): 3
03-17 15:05:53.385: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.385: D/GABI(955): 3
03-17 15:05:53.401: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.401: D/GABI(955): 3
03-17 15:05:53.418: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.418: D/GABI(955): 3
03-17 15:05:53.435: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.435: D/GABI(955): 3
03-17 15:05:53.452: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.452: D/GABI(955): 3
03-17 15:05:53.468: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.468: D/GABI(955): 3
03-17 15:05:53.485: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.485: D/GABI(955): 3
03-17 15:05:53.485: D/GABI(955): fragment adaprter - item key requested:2 item convertion is:3
03-17 15:05:53.485: D/GABI(955): fragment adaprter - returning TYPE4 fragment
03-17 15:05:53.485: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.485: D/GABI(955): 3
03-17 15:05:53.490: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.490: D/GABI(955): 3
03-17 15:05:53.490: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.490: D/GABI(955): 3
03-17 15:05:53.491: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.491: D/GABI(955): 3
03-17 15:05:53.976: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.976: D/GABI(955): 3
03-17 15:05:53.976: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.976: D/GABI(955): 3
03-17 15:05:53.976: D/GABI(955): fragment adaprter - count:
03-17 15:05:53.976: D/GABI(955): 3
03-17 15:05:54.003: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.003: D/GABI(955): 3
03-17 15:05:54.019: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.019: D/GABI(955): 3
03-17 15:05:54.020: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.020: D/GABI(955): 3
03-17 15:05:54.022: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.022: D/GABI(955): 3
03-17 15:05:54.036: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.036: D/GABI(955): 3
03-17 15:05:54.036: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.036: D/GABI(955): 3
03-17 15:05:54.038: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.038: D/GABI(955): 3
03-17 15:05:54.053: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.053: D/GABI(955): 3
03-17 15:05:54.053: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.053: D/GABI(955): 3
03-17 15:05:54.054: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.054: D/GABI(955): 3
03-17 15:05:54.069: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.069: D/GABI(955): 3
03-17 15:05:54.069: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.069: D/GABI(955): 3
03-17 15:05:54.070: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.070: D/GABI(955): 3
03-17 15:05:54.075: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.075: D/GABI(955): 3
03-17 15:05:54.075: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.075: D/GABI(955): 3
03-17 15:05:54.075: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.075: D/GABI(955): 3
03-17 15:05:54.086: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.086: D/GABI(955): 3
03-17 15:05:54.103: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.103: D/GABI(955): 3
03-17 15:05:54.120: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.120: D/GABI(955): 3
03-17 15:05:54.136: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.136: D/GABI(955): 3
03-17 15:05:54.153: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.153: D/GABI(955): 3
03-17 15:05:54.170: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.170: D/GABI(955): 3
03-17 15:05:54.187: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.187: D/GABI(955): 3
03-17 15:05:54.203: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.203: D/GABI(955): 3
03-17 15:05:54.220: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.220: D/GABI(955): 3
03-17 15:05:54.237: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.237: D/GABI(955): 3
03-17 15:05:54.254: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.254: D/GABI(955): 3
03-17 15:05:54.270: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.270: D/GABI(955): 3
03-17 15:05:54.287: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.287: D/GABI(955): 3
03-17 15:05:54.303: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.303: D/GABI(955): 3
03-17 15:05:54.321: D/GABI(955): fragment adaprter - count:
03-17 15:05:54.321: D/GABI(955): 3
1 个解决方案
解决方案1
1 已采纳 2017-03-17 14:07:15
我想我知道你的问题。 正如我所说的，viewpagers屏幕外默认值和最小值为1。因此，第一个片段的类型为1。第二个片段的类型为4。现在您的对象将被更新并添加类型2。 但是片段1（类型1）和片段2（类型4）已经加载，并已放入viewpagers缓存中。
更新前的地图：
索引0 =类型1
索引1 =类型4
更新后的地图：
索引0 =类型1
索引1 =类型2 <-这个是新的
索引2 =类型4
您当前在屏幕上看到的内容：
索引0 =类型1
索引1 =类型4 <-此值未更新（应该为2）
索引2 =类型4
但是新类型（类型2）不会被更新，因为它已经在索引1处加载和缓存。适配器将正确创建索引2的片段，即类型4。
如何在Android的单个活动中为不同的片段使用不同的工具栏？
[英]How to use different toolbar for different fragments in a single activity in android?
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