【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