【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:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent" >

  <com.amap.api.maps.MapView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/mapView"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
  </com.amap.api.maps.MapView>

</RelativeLayout>

Java代码：

package com.cc.android.map.fragment;

import android.app.Activity;
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;

import com.amap.api.maps.AMap;
import com.amap.api.maps.MapView;
import com.cc.android.map.MainActivity;
import com.cc.android.map.R;
import com.cc.android.map.constant.Constants;

public class MapFragment extends Fragment {
  
  private static MapFragment fragment=null;
  public static final int POSITION=0;
  
  private MapView mapView;
  private AMap aMap;
  private View mapLayout;
  
  public static Fragment newInstance(){
    if(fragment==null){
      synchronized(MapFragment.class){
        if(fragment==null){
          fragment=new MapFragment();
        }
      }
    }
    return fragment;
  }
  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container,
      Bundle savedInstanceState) {
    if (mapLayout == null) {
      Log.i("sys", "MF onCreateView() null");
      mapLayout = inflater.inflate(R.layout.map, null);
      mapView = (MapView) mapLayout.findViewById(R.id.mapView);
      mapView.onCreate(savedInstanceState);
      if (aMap == null) {
        aMap = mapView.getMap();
      }
    }else {
      if (mapLayout.getParent() != null) {
        ((ViewGroup) mapLayout.getParent()).removeView(mapLayout);
      }
    }
    return mapLayout;
  }

  @Override
  public void onAttach(Activity activity) {
    super.onAttach(activity);
    ((MainActivity) activity).onSectionAttached(Constants.MAP_FRAGMENT);
  }
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    
  }

  @Override
  public void onResume() {
    Log.i("sys", "mf onResume");
    super.onResume();
    mapView.onResume();
  }

  /**
   * 方法必须重写
   * map的生命周期方法
   */
  @Override
  public void onPause() {
    Log.i("sys", "mf onPause");
    super.onPause();
    mapView.onPause();
  }

  /**
   * 方法必须重写
   * map的生命周期方法
   */
  @Override
  public void onSaveInstanceState(Bundle outState) {
    Log.i("sys", "mf onSaveInstanceState");
    super.onSaveInstanceState(outState);
    mapView.onSaveInstanceState(outState);
  }

  /**
   * 方法必须重写
   * map的生命周期方法
   */
  @Override
  public void onDestroy() {
    Log.i("sys", "mf onDestroy");
    super.onDestroy();
    mapView.onDestroy();
  }
}

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:

android:screenOrientation="portrait"

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