【Android】说做就做：都市列表+卫星地图

前言：为了得奖。。。android。。。T_T。。。

完成notepad 3部曲，又看了其他人的MapView使用例子，手痒啊，做了个简陋的都市列表，并用MapView来看卫星地图，还有目前路况（traffic，如果有的话），Zoom In/Out，纯抄袭，羞愧中。。。

基本上基于notepad样板，做了个City的list：（偷工减料，static一下了，其实应该从db或者web service上面拿。。。）

java 代码

static {
        cities = new ArrayList<String>();
        cities.add("beijing");
        cities.add("london");
        cities.add("bangalore");
        cities.add("potsdam");
        cities.add("brasilia");

        geocodes = new HashMap<String, GeoPoint>();
        geocodes.put("beijing", new GeoPoint(40.25f,116.5f));
        geocodes.put("london", new GeoPoint(51.52f,-0.1f));
        geocodes.put("bangalore", new GeoPoint(12.97f,77.56f));
        geocodes.put("potsdam", new GeoPoint(52.4f,13.07f));
        geocodes.put("brasilia", new GeoPoint(-15.78f,-47.91f));

    }

geocode是从IBM一个Perl的例子上copy的。。。

接下来把notepad copy一下，改成自己的东西。。。

java 代码

@Override
    protected void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(R.layout.city_list);
        fillData();
    }

    private void fillData() {
        ArrayAdapter<String> cities =
            new ArrayAdapter<String>(this, R.layout.city_row, MapConstants.cities);
        setListAdapter(cities);
    }


    @Override
    protected void onListItemClick(ListView l, View v, int position, long id) {
        super.onListItemClick(l, v, position, id);

        Intent i = new Intent(this, CityMap.class);
//这里传递选择的城市名字
        i.putExtra(MapConstants.CITY_NAME, MapConstants.cities.get(position));
        startSubActivity(i, ACTIVITY_VIEW);
    }

//mapview 回来的时候显示城市list
    @Override
    protected void onActivityResult(int requestCode, int resultCode, String data, Bundle extras) {
        super.onActivityResult(requestCode, resultCode, data, extras);
        fillData();
    }

现在是重点了，CityMap：

java 代码

public class CityMap extends MapActivity

要extends MapActivity，因为是个View嘛。。。

在onCreate()里面拿到传递进去的city，然后拿city的geocode：

java 代码

private MapView myMapView;

    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);

        Bundle extras = getIntent().getExtras();

        // get the geopoint by city
        String city = extras.getString(MapConstants.CITY_NAME);

        GeoPoint gp = MapConstants.geocodes.get(city);

GeoPoint是个DTO/VO，里面就放两个float的经度和纬度：

java 代码

public class GeoPoint {

    private float latitude;
    private float longitude;

java 代码

myMapView = new MapView(this);

Point p = new Point((int) (gp.getLatitude() * 1000000),
                              (int) (gp.getLongitude() * 1000000));
        // 地图控制器。。。
        MapController mc = myMapView.getController();

        mc.animateTo(p);
        // 21是最zoom in的一级，一共是1-21级
        mc.zoomTo(21);

        setContentView(myMapView);
        // 切换到卫星地图
        myMapView.toggleSatellite();

搞定显示，接下来是key events：
i: zoom in
o: zoom out
s: satellite
t: traffic

java 代码

public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_I) {
            // zoom in
            myMapView.getController().zoomTo(myMapView.getZoomLevel() + 1);
            return true;
        } else if (keyCode == KeyEvent.KEYCODE_O) {
            // zoom out
            myMapView.getController().zoomTo(myMapView.getZoomLevel() - 1);
            return true;
        } else if (keyCode == KeyEvent.KEYCODE_S) {
          // 卫星地图
            myMapView.toggleSatellite();
            return true;
        } else if (keyCode == KeyEvent.KEYCODE_T) {
            // traffic，路况
            myMapView.toggleTraffic();
            return true;
        }
        return false;
    }

最后加个回到城市list的menu：

java 代码

@Override
    public boolean onCreateOptionsMenu(Menu menu) {
        super.onCreateOptionsMenu(menu);
        menu.add(0, EXIT_ID, R.string.exit_citymap);
        return true;
    }

    @Override
    public boolean onMenuItemSelected(int featureId, Item item) {
        super.onMenuItemSelected(featureId, item);
        switch(item.getId()) {
        case EXIT_ID:
            finish();
            break;
        }

        return true;
    }

评论

14 楼 fastzch 2007-12-10  

各位有在android中如何开发Web Service的教程或例子吗？

13 楼 lordhong 2007-12-01  

慢慢来,我也是刚起步,东抄西抄的...

12 楼 qiuzhiqing 2007-11-30  

跑了个HelloWorld！呵呵
差距啊~~~

11 楼 andy54321 2007-11-26  

暂时还没研究这个地步,看来差距不小呢

10 楼 huanghero0663 2007-11-21  

crazyox 写道

好东西, 不知道以后做这种手机软件的公司会不会多, 前景好不好啊!

关注中，希望又新的东西出来^_^

9 楼 crazyox 2007-11-20  

好东西, 不知道以后做这种手机软件的公司会不会多, 前景好不好啊!

8 楼 lordhong 2007-11-20  

今天就adb shell。。。rm了一把，NND，程序都改了，emulator竟然不把新的app load进去，真是白痴。。。害我debug半个多小时。。，

7 楼 yb31 2007-11-19  

试了下
adb shell 里已经有了.
重新rm掉.再install,或push也不行

6 楼 fins 2007-11-19  

lordhong 写道

我用adb install lordhong.MapDemo1.apk，然后显示0 bytes虾米的，emulator里面也找不到。。。怎么回事？严格按照google doc：
Running an Android Application

To run a compiled application, you will upload the .apk file to the /data/app/ directory in the emulator using the adb tool as described here:

   1. Start the emulator (run <your_sdk_dir>/tools/emulator from the command line)
   2. On the emulator, navigate to the home screen (it is best not to have that application running when you reinstall it on the emulator; press the Home key to navigate away from that application).
   3. Run adb install myproject/bin/<appname>.apk to upload the executable. So, for example, to install the Lunar Lander sample, navigate in the command line to <your_sdk_dir>/sample/LunarLander and type ../../tools/adb install bin/LunarLander.apk
   4. In the emulator, open the list of available applications, and scroll down to select and start your application.

—T.T...

进 adb shell里 看不到?? 如果能看到 rm了 然后从新 push吧

5 楼 fins 2007-11-19  

lordhong 写道

我用adb install lordhong.MapDemo1.apk，然后显示0 bytes虾米的，emulator里面也找不到。。。怎么回事？严格按照google doc：
Running an Android Application

To run a compiled application, you will upload the .apk file to the /data/app/ directory in the emulator using the adb tool as described here:

   1. Start the emulator (run <your_sdk_dir>/tools/emulator from the command line)
   2. On the emulator, navigate to the home screen (it is best not to have that application running when you reinstall it on the emulator; press the Home key to navigate away from that application).
   3. Run adb install myproject/bin/<appname>.apk to upload the executable. So, for example, to install the Lunar Lander sample, navigate in the command line to <your_sdk_dir>/sample/LunarLander and type ../../tools/adb install bin/LunarLander.apk
   4. In the emulator, open the list of available applications, and scroll down to select and start your application.

—T.T...

进 adb shell里 看不到?? 如果能看到 rm了 然后从新 push吧

4 楼 crazyox 2007-11-19  

今天javaeye是怎么了? 老打不开自己的博客?

3 楼 crazyox 2007-11-19  

android做出来的东西可以直接在手机上看?

2 楼 lordhong 2007-11-19  

我用adb install lordhong.MapDemo1.apk，然后显示0 bytes虾米的，emulator里面也找不到。。。怎么回事？严格按照google doc：
Running an Android Application

To run a compiled application, you will upload the .apk file to the /data/app/ directory in the emulator using the adb tool as described here:

   1. Start the emulator (run <your_sdk_dir>/tools/emulator from the command line)
   2. On the emulator, navigate to the home screen (it is best not to have that application running when you reinstall it on the emulator; press the Home key to navigate away from that application).
   3. Run adb install myproject/bin/<appname>.apk to upload the executable. So, for example, to install the Lunar Lander sample, navigate in the command line to <your_sdk_dir>/sample/LunarLander and type ../../tools/adb install bin/LunarLander.apk
   4. In the emulator, open the list of available applications, and scroll down to select and start your application.

—T.T...

1 楼 lordhong 2007-11-19  

靠！有附件就发不上去，去掉附件就可以了，JE大bug啊。。。附件续上。。。