osmdroid显示一个空网格 [英] osmdroid displays an empty grid

问题描述

我想尝试具有OpenStreetMap的集成由osmdroid，但我被困在了一个问题，我不知道什么是失踪。的情况如下：

I wanted to try out having OpenStreetMap integration by osmdroid, but I got stuck at an issue where I have no idea what is missing. The scenario is as follows:

症状：图窗口小部件被显示，但只能用一个空格

这是在我的Activity类：

This is in my Activity class:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    MapView mapView = new MapView(this, 256);
    mapView.setTileSource(TileSourceFactory.MAPNIK);
    mapView.setClickable(true);
    mapView.setBuiltInZoomControls(true);
    setContentView(mapView);
}

（我试过选择各种TileSources看似没有区别）

(I tried selecting various TileSources with seemingly no difference)

我的清单还包括这些权限（如℃的孩子;清单＆GT; ，在＆LT;使用-SDK＆GT; ）：

My Manifest also includes these permissions (as a child of <manifest>, after <uses-sdk>):

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

...和我的仿真器以其他方式连接到互联网，如。网页浏览器。

...and my emulator is otherwise connected to the internet, eg. web browsers work.

osmdroid和SLF4J是在构建路径。该应用程序编译没有问题，不会产生异常。

osmdroid and slf4j are in the build path. The app compiles without a problem and generates no exceptions.

什么地方出错了？

非常感谢！

解决：这是我的模拟器没有外部存储缓存地图图块引起

推荐答案

我是pretty的新OSMdroid太多，但尝试这样做呢？

I'm pretty new to OSMdroid too but try doing this?

setContentView(R.layout.offline_map_activity);
mapView = (MapView) findViewById(R.id.openmapview);

您还需要有offline_map_activity.xml在RES /布局：

You would also need to have offline_map_activity.xml in your res/layouts:

<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="vertical" >

    <org.osmdroid.views.MapView
        android:id="@+id/openmapview"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"/>
</LinearLayout>

希望这对你的作品。至少这个工作对我的codeS：）

Hope this works for you. At least this worked for my codes :)

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