【Android笔记】Fragment中显示高德地图

本文来自:fair-jm.iteye.com 转截请注明出处

官网的教程是在Activity下 在Fragment下在高德论坛找到一些方法 试了下可以显示 但是切换后总会有些问题

比如切换后就是新的了 切换后地图就不显示了

我这种方式可以在切换后保持地图状态 但是得限定屏幕为水平或者竖直 如果翻转的话也会报错

布局文件:

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3   android:layout_width="fill_parent"
 4   android:layout_height="fill_parent" >
 5 
 6   <com.amap.api.maps.MapView
 7     xmlns:android="http://schemas.android.com/apk/res/android"
 8     android:id="@+id/mapView"
 9     android:layout_width="match_parent"
10     android:layout_height="match_parent" >
11   </com.amap.api.maps.MapView>
12 
13 </RelativeLayout>

Java代码：

  1 package com.cc.android.map.fragment;
  2 
  3 import android.app.Activity;
  4 import android.os.Bundle;
  5 import android.support.v4.app.Fragment;
  6 import android.util.Log;
  7 import android.view.LayoutInflater;
  8 import android.view.View;
  9 import android.view.ViewGroup;
 10 
 11 import com.amap.api.maps.AMap;
 12 import com.amap.api.maps.MapView;
 13 import com.cc.android.map.MainActivity;
 14 import com.cc.android.map.R;
 15 import com.cc.android.map.constant.Constants;
 16 
 17 public class MapFragment extends Fragment {
 18   
 19   private static MapFragment fragment=null;
 20   public static final int POSITION=0;
 21   
 22   private MapView mapView;
 23   private AMap aMap;
 24   private View mapLayout;
 25   
 26   public static Fragment newInstance(){
 27     if(fragment==null){
 28       synchronized(MapFragment.class){
 29         if(fragment==null){
 30           fragment=new MapFragment();
 31         }
 32       }
 33     }
 34     return fragment;
 35   }
 36   @Override
 37   public View onCreateView(LayoutInflater inflater, ViewGroup container,
 38       Bundle savedInstanceState) {
 39     if (mapLayout == null) {
 40       Log.i("sys", "MF onCreateView() null");
 41       mapLayout = inflater.inflate(R.layout.map, null);
 42       mapView = (MapView) mapLayout.findViewById(R.id.mapView);
 43       mapView.onCreate(savedInstanceState);
 44       if (aMap == null) {
 45         aMap = mapView.getMap();
 46       }
 47     }else {
 48       if (mapLayout.getParent() != null) {
 49         ((ViewGroup) mapLayout.getParent()).removeView(mapLayout);
 50       }
 51     }
 52     return mapLayout;
 53   }
 54 
 55   @Override
 56   public void onAttach(Activity activity) {
 57     super.onAttach(activity);
 58     ((MainActivity) activity).onSectionAttached(Constants.MAP_FRAGMENT);
 59   }
 60   @Override
 61   public void onCreate(Bundle savedInstanceState) {
 62     super.onCreate(savedInstanceState);
 63     
 64   }
 65 
 66   @Override
 67   public void onResume() {
 68     Log.i("sys", "mf onResume");
 69     super.onResume();
 70     mapView.onResume();
 71   }
 72 
 73   /**
 74    * 方法必须重写
 75    * map的生命周期方法
 76    */
 77   @Override
 78   public void onPause() {
 79     Log.i("sys", "mf onPause");
 80     super.onPause();
 81     mapView.onPause();
 82   }
 83 
 84   /**
 85    * 方法必须重写
 86    * map的生命周期方法
 87    */
 88   @Override
 89   public void onSaveInstanceState(Bundle outState) {
 90     Log.i("sys", "mf onSaveInstanceState");
 91     super.onSaveInstanceState(outState);
 92     mapView.onSaveInstanceState(outState);
 93   }
 94 
 95   /**
 96    * 方法必须重写
 97    * map的生命周期方法
 98    */
 99   @Override
100   public void onDestroy() {
101     Log.i("sys", "mf onDestroy");
102     super.onDestroy();
103     mapView.onDestroy();
104   }
105 }

这样可以保证在切换fragment的时候 地图不会不显示或者还原

另外注意要在清单中注明app的方向 不能让屏幕翻转

在Activity标签中写:

1 android:screenOrientation="portrait"

参考原文：http://www.tuicool.com/articles/FnqYRf