Java 如何在片段类中显示listView?
我是android编程新手。我想尝试使用片段制作简单的选项卡布局应用程序,如何在片段中显示listView,我在谷歌上搜索并找到了一个解决方案,但它并没有使用fragment类。我可以显示webview,但如何显示listVIew 我的tab1类:Java 如何在片段类中显示listView?,java,android,listview,android-fragments,tabs,Java,Android,Listview,Android Fragments,Tabs,我是android编程新手。我想尝试使用片段制作简单的选项卡布局应用程序,如何在片段中显示listView,我在谷歌上搜索并找到了一个解决方案,但它并没有使用fragment类。我可以显示webview,但如何显示listVIew 我的tab1类: public class Tab1 extends Fragment { WebView webView; @Override public void onActivityCreated(Bundle savedInst
public class Tab1 extends Fragment {
WebView webView;
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
// get the url to open
// set up the WebView
webView = (WebView) getView().findViewById(R.id.webView);
webView.setWebViewClient(new MyBrowser());
webView.getSettings().setLoadsImagesAutomatically(true);
webView.getSettings().setJavaScriptEnabled(true);
webView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
webView.loadUrl("http://www.google.com");
}
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View v =inflater.inflate(R.layout.tab_1,container,false);
return v;
}
private class MyBrowser extends WebViewClient {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
}
}
我的tab2类(我想在这里显示listView):
片段适配器:
公共类ViewPagerAdapter扩展了FragmentStatePagerAdapter{
CharSequence Titles[]; // This will Store the Titles of the Tabs which are Going to be passed when ViewPagerAdapter is created
int NumbOfTabs; // Store the number of tabs, this will also be passed when the ViewPagerAdapter is created
// Build a Constructor and assign the passed Values to appropriate values in the class
public ViewPagerAdapter(FragmentManager fm,CharSequence mTitles[], int mNumbOfTabsumb) {
super(fm);
this.Titles = mTitles;
this.NumbOfTabs = mNumbOfTabsumb;
}
//This method return the fragment for the every position in the View Pager
@Override
public Fragment getItem(int position) {
if(position == 0) // if the position is 0 we are returning the First tab
{
Tab1 tab1 = new Tab1();
return tab1;
}
else //if (position == 1) // As we are having 2 tabs if the position is now 0 it must be 1 so we are returning second tab
{
Tab2 tab2 = new Tab2();
return tab2;
} // else // { // NewKasus newKasus = new NewKasus(); // return newKasus; // }
}
// This method return the titles for the Tabs in the Tab Strip
@Override
public CharSequence getPageTitle(int position) {
return Titles[position];
}
// This method return the Number of tabs for the tabs Strip
@Override
public int getCount() {
return NumbOfTabs;
} }
我的主要活动:
public class MainActivity extends ActionBarActivity {
//
// Declaring Your View and Variables
Toolbar toolbar;
ViewPager pager;
ViewPagerAdapter adapter;
SlidingTabLayout tabs;
CharSequence Titles[]={"Berita","Kasus","Add Kasus"};
int Numboftabs =3;
//
// bawaaan materal tab
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Creating The Toolbar and setting it as the Toolbar for the activity
toolbar = (Toolbar) findViewById(R.id.tool_bar);
setSupportActionBar(toolbar);
// Creating The ViewPagerAdapter and Passing Fragment Manager, Titles fot the Tabs and Number Of Tabs.
adapter = new ViewPagerAdapter(getSupportFragmentManager(),Titles,Numboftabs);
// Assigning ViewPager View and setting the adapter
pager = (ViewPager) findViewById(R.id.pager);
pager.setAdapter(adapter);
// Assiging the Sliding Tab Layout View
tabs = (SlidingTabLayout) findViewById(R.id.tabs);
tabs.setDistributeEvenly(true); // To make the Tabs Fixed set this true, This makes the tabs Space Evenly in Available width
// Setting Custom Color for the Scroll bar indicator of the Tab View
tabs.setCustomTabColorizer(new SlidingTabLayout.TabColorizer() {
@Override
public int getIndicatorColor(int position) {
return getResources().getColor(R.color.tabsScrollColor);
}
});
// Setting the ViewPager For the SlidingTabsLayout
tabs.setViewPager(pager);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
在这里,我给你们一个简单的例子,用片段显示列表 你的碎片先
public class Tab1 extends ListFragment {
String[] list_items;
Tab1(){
}
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View rootView =inflater.inflate(R.layout.tab_1,container,false);
list_items= getResources().getStringArray(R.array.list);
setListAdapter(new ArrayAdapter(getActivity(),android.R.layout.simple_list_item_1,list_items);
return rootView;
}
}
在您的strings.xml中
<string-array name="list">
<item>item1</item>
<item>item1</item>
<item>item1</item>
<item>item1</item>
<item>item1</item>
</string-array>
项目1
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您的tab_1布局必须具有..listView.with idandroid:list
只有在使用ListFragment类扩展片段时,才需要这样做。
如果您只是使用片段进行扩展,则无需添加此特定idandroid:list
对于这个例子,我给你需要以下在你的布局
<ListView android:id="@id/android:list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#00FF00"
android:layout_weight="1"
/>
这就是在片段中创建listView所需的全部内容
在您的例子中,您在数组中获取数据,然后在listView中传递它。
这里是我在本地使用的示例。希望有帮助!您的数据源是什么?如果您使用的是普通字符串,您可以在您的
onCreateView
方法中执行此操作,就像在活动中执行此操作一样
如果您是从数据库或网络获取数据,最好使用AsyncTask的
onPostExecute
方法执行此操作,请添加一个特定的问题声明-“它不起作用”可以假设,但它是如何工作的?什么错误消息或错误行为是其特征?请查看此答案中的代码:
<ListView android:id="@id/android:list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#00FF00"
android:layout_weight="1"
/>