Android:使用 ViewPager 访问 Fragment 内的 Mapview [英] Android : Access Mapview Inside Fragment With ViewPager
问题描述
我正在使用 View Pager 显示三个视图.
I am Using View Pager to Display three Views.
"Filter","Streets","Around"
每个视图都由 Fragment 定义.
Each View is Defined by Fragment.
我想要什么:我想在我的 FilterFragment 中使用 Mapview.
WHAT I WANT : I want to Use Mapview Inside My FilterFragment.
我做了什么:
我想在过滤器片段中使用 MapView 但无法成功运行.并获取日志分类错误:
I want to Use MapView Inside Filter Fragment but Could Not Able to Run Successfully. and Getting Log cate Error:
android.view.InflateException: Binary XML file line #33: Error inflating class com.google.android.maps.MapView
我还在 Net 和 Stackoverflow 上搜索过这个问题，并找到了 LINK和 LINK 但无法找到与我的问题相关的链接使用带有 ViewPager 的片段.
I have also Searched on Net and Stackoverflow about this Problem and Found the LINK and LINK but Could not able to Found this link Related to my Problem as i am using Fragment With ViewPager.
我的代码如下.
这是我的 MainViewPager.java 代码:
Here is My Code for MainViewPager.java:
package com.example.viewpageractivitydemo;
import com.example.viewpageractivitydemo.viewpager.TitlePageIndicator;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.util.Log;
public class MainViewPager extends FragmentActivity {
TestFragmentAdapter adapter;
ViewPager pager;
@Override
protected void onCreate(Bundle arg0) {
// TODO Auto-generated method stub
super.onCreate(arg0);
Log.i("MainViewPager","Inside Oncreate");
setContentView(R.layout.mainviewpager);
pager = (ViewPager) findViewById(R.id.pager);
adapter = new TestTitleFragmentAdapter(getSupportFragmentManager());
pager.setAdapter(adapter);
TitlePageIndicator indicator = (TitlePageIndicator) findViewById(R.id.indicator);
indicator.setViewPager(pager);
pager.setCurrentItem(1);
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
// pager.setCurrentItem(1);
}
}
这是 TestFragmentAdapter.java 的代码
Here is Code for TestFragmentAdapter.java
package com.example.viewpageractivitydemo;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.util.Log;
public class TestFragmentAdapter extends FragmentPagerAdapter {
protected static final String[] CONTENT = new String[] { "Filter",
"Streets", "Around" };
public String TAG = "TestFragmentAdapter";
private int mCount = CONTENT.length;
public TestFragmentAdapter(FragmentManager fm) {
super(fm);
// TODO Auto-generated constructor stub
}
@Override
public Fragment getItem(int position) {
// TODO Auto-generated method stub
Log.i(TAG, "Inside getItemMethod with position " + position);
if (position == 0) {
Log.i("TestFragmentAdapter","Inside if Condition");
return FilterFragment.newInstance(position);
} else if (position == 1) {
return StreetsFragment.newInstance(position);
} else if (position == 2) {
return AroundFragment.newInstance(position);
} else {
return null;
}
// return MainFragment.newInstance(CONTENT[position % CONTENT.length]);
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return mCount;
}
public void setCount(int count) {
if (count > 0 && count <= 10) {
mCount = count;
notifyDataSetChanged();
}
}
}
这是我的 FilterFragment.java 代码:
Here is My Code for FilterFragment.java:
package com.example.viewpageractivitydemo;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class FilterFragment extends Fragment {
/*
* @Override protected Class<? extends Activity> getActivityClass() { //
* TODO Auto-generated method stub return MyFilterActivity.class; }
*/
public static Fragment newInstance(int position) {
Log.i("FilterFragment","Inside New Instasnce");
FilterFragment filterFragment = new FilterFragment();
return filterFragment;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
Log.i("FilterFragment","Inside OcCreateView");
View view = inflater.inflate(R.layout.filter, null);
return view;
}
}
这是我的 filter.xml 代码:
Here is My Code for filter.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#C6CDD4"
android:gravity="center"
android:orientation="vertical" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#93A4BA"
android:gravity="center" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_margin="5dp"
android:gravity="center"
android:text="Where Am I"
android:textColor="#ffffff"
android:textSize="18dp"
android:textStyle="bold" >
</TextView>
</LinearLayout>
<com.google.android.maps.MapView
android:id="@+id/whereami_mapview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:apiKey="0-PaH6rk7RKrZSMd_lqdrZi6FazYyIlX5r6YFyA"
android:clickable="true" />
<!--
<com.google.android.maps.MapView
android:id="@+id/whereami_mapview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:apiKey="0-PaH6rk7RKrZSMd_lqdrZi6FazYyIlX5r6YFyA" />
-->
</LinearLayout>
</LinearLayout>
请任何人都可以建议我回答以解决我的问题.我在这上面花了很多时间.仍然对我的问题没有任何想法.提前致谢.
Please Can anyone Suggest Me Answer to Solve My Problem. I have Spent many Hours on this. Still not getting any Idea about my Question. Thnks in Advance.
推荐答案
您可以使用 LocalActivityManager 在片段中托管 Activity.这是一个已弃用的类，但它提供了最简单的解决方案.
You can use LocalActivityManager to host a Activity inside a fragment. It is a deprecated class, but it offers the simplest solution.
这是片段的代码(MyFilterFragment 在您的代码中).YourMapActivity 是扩展 MapActivity 的基本活动.
Here is the code for a fragment (MyFilterFragment in your code). YourMapActivity is a basic activity that extends MapActivity.
public class MapFragment extends Fragment {
private static final String KEY_STATE_BUNDLE = "localActivityManagerState";
private LocalActivityManager mLocalActivityManager;
protected LocalActivityManager getLocalActivityManager() {
return mLocalActivityManager;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Bundle state = null;
if (savedInstanceState != null) {
state = savedInstanceState.getBundle(KEY_STATE_BUNDLE);
}
mLocalActivityManager = new LocalActivityManager(getActivity(), true);
mLocalActivityManager.dispatchCreate(state);
}
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
//This is where you specify you activity class
Intent i = new Intent(getActivity(), YourMapActivity.class);
Window w = mLocalActivityManager.startActivity("tag", i);
View currentView=w.getDecorView();
currentView.setVisibility(View.VISIBLE);
currentView.setFocusableInTouchMode(true);
((ViewGroup) currentView).setDescendantFocusability(ViewGroup.FOCUS_AFTER_DESCENDANTS);
return currentView;
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putBundle(KEY_STATE_BUNDLE,
mLocalActivityManager.saveInstanceState());
}
@Override
public void onResume() {
super.onResume();
mLocalActivityManager.dispatchResume();
}
@Override
public void onPause() {
super.onPause();
mLocalActivityManager.dispatchPause(getActivity().isFinishing());
}
@Override
public void onStop() {
super.onStop();
mLocalActivityManager.dispatchStop();
}
@Override
public void onDestroy() {
super.onDestroy();
mLocalActivityManager.dispatchDestroy(getActivity().isFinishing());
}
}
<小时>
自发布此答案以来，Google 已经发布了带有官方 MapFragment 类的片段支持的 Google Maps Android API.
Since this answer was posted, Google has released Google Maps Android API with fragment support with an official MapFragment class.
这篇关于Android:使用 ViewPager 访问 Fragment 内的 Mapview的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
