我正在尝试构建一个将实现操作栏选项卡的应用程序。其中一个选项卡应包含 MapFragment。
如何实现带有选项卡的操作栏,其中一个是地图片段?
你能帮我解决这个问题吗?
这是我到目前为止所拥有的:
主班
package com.nfc.demo;
import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentTransaction;
import android.os.Bundle;
public class NFCDemoActivity extends Activity {
Tab selectedTab = null;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ActionBar bar = getActionBar();
bar.setDisplayShowHomeEnabled(false);
bar.setDisplayShowTitleEnabled(false);
bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
bar.setCustomView(R.layout.main);
ActionBar.Tab mapTab = bar.newTab().setText("Map");
ActionBar.Tab settingsTab = bar.newTab().setText("Settings");
ActionBar.Tab aboutTab = bar.newTab().setText("About");
MapFragment mapFragment = new MapFragment();
SettingsFragment settingsFragment = new SettingsFragment();
AboutFragment aboutFragment = new AboutFragment();
mapTab.setTabListener(new TabListener(mapFragment));
settingsTab.setTabListener(new TabListener(settingsFragment));
aboutTab.setTabListener(new TabListener(aboutFragment));
Tab selectedTab = (Tab) getLastNonConfigurationInstance();
if (selectedTab == null) {
bar.addTab(mapTab, false);
bar.addTab(settingsTab, false);
bar.addTab(aboutTab, true);
}
setContentView(R.layout.main);
}
public Object onRetainNonConfigurationInstance() {
return selectedTab;
}
protected boolean isRouteDisplayed() {
return false;
}
protected class TabListener implements ActionBar.TabListener {
private Fragment fragment;
public TabListener(Fragment fragment) {
this.fragment = fragment;
}
public void onTabSelected(Tab tab, FragmentTransaction fragmentTransaction) {
fragmentTransaction.replace(R.id.mainFragment, this.fragment, null);
selectedTab = tab;
}
public void onTabUnselected(Tab tab, FragmentTransaction fragmentTransaction) {
fragmentTransaction.remove(this.fragment);
}
public void onTabReselected(Tab tab, FragmentTransaction fragmentTransaction) {
//do nothing
}
}
}
Fragment 类都只是返回一个带有 .xml 布局的充气器。
XML 布局:
main.xml(地图应该在这个 XML 文件上)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/mainFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
</LinearLayout>
settings.xml 和 about.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<TextView
android:id="@+id/textView123"
android:text="asdfg"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
但是添加MapFragment
thws 一个错误:
Error inflating class fragment
error caused by java.lang.IllegalArgumentException:
Binary XML file line #2: Duplicate id 0x7f040005, tag null, or parent id 0x1020002 with another fragment for com.google.android.gms.maps.MapFragment 12-28 21:14:07.991: E/AndroidRuntime(26189): at android.app.Activity.onCreateView(Activity.java:4722)
几天来我一直在试图弄清楚如何进行,但我真的很困惑。任何帮助/提示将不胜感激。
还有,怎么getLastNonConfigurationInstance()
办?它已被弃用。