在我的应用程序中,我需要创建一个动态列表视图,该视图由从db中提取的元素填充。
这本身并不是一个大问题(有很多关于它的教程,比如this one),问题是,我的活动分为标签,因此,我有一个{每个标签{1}}(代码基本上是this)。
有很多方法我无法在Fragment
中使用,而且我真的很卡住。
如何在片段中实现动态布局解决方案?
编辑:代码为清晰起见:
片段:
Fragment
的活动:
package it.sii.mywaiter;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class AllerFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.aller_layout, container, false);
return rootView;
}
}
适配器
package it.sii.mywaiter;
import android.app.ActionBar.Tab;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
//import android.widget.*;
import android.app.ActionBar;
public class UserPrefActivity extends FragmentActivity implements ActionBar.TabListener {
private ViewPager viewPager;
private PrefPagerAdapter mAdapter;
private ActionBar actionBar;
// Tab titles
private String[] tabs = { "Ingredienti preferiti", "Allergie e Intolleranze" };
int tabsnum = tabs.length;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.user_pref_layout);
// Initilization
viewPager = (ViewPager) findViewById(R.id.pager);
actionBar = getActionBar();
mAdapter = new PrefPagerAdapter(getSupportFragmentManager());
mAdapter.setCount(tabsnum);
viewPager.setAdapter(mAdapter);
actionBar.setHomeButtonEnabled(false);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Adding Tabs
for (String tab_name : tabs) {
actionBar.addTab(actionBar.newTab().setText(tab_name)
.setTabListener(this));
}
/**
* on swiping the viewpager make respective tab selected
* */
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageSelected(int position) {
// on changing the page
// make respected tab selected
actionBar.setSelectedNavigationItem(position);
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
@Override
public void onPageScrollStateChanged(int arg0) {
}
});
}
@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// on tab selected
// show respected fragment view
viewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
}
}
片段的布局:
package it.sii.mywaiter;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
public class PrefPagerAdapter extends FragmentPagerAdapter {
private int count = 0;
public PrefPagerAdapter(FragmentManager fm) {
super(fm);
}
public void setCount(int count){
this.count = count;
}
@Override
public Fragment getItem(int index) {
switch (index) {
case 0:
return new PrefFragment();
case 1:
return new AllerFragment();
}
return null;
}
@Override
public int getCount() {
return count;
}
}
答案 0 :(得分:0)
正如你所说,你有碎片。每个Fragment都有自己的类,因此您可以创建CustomArrayAdapter并在Fragments onCreate
方法中使用它。在Fragment中,使用findViewByID
获取您在此片段的xml文件中定义的ListView,然后使用setAdapter(new YourCustomAdapterClass());
设置其适配器,然后在片段中拥有自定义动态ListView。