转载地址：http://mobiarch.wordpress.com/2012/07/17/testing-with-mock-location-data-in-android/
The DDMS tool can be used to push out test location during testing. However, it has two serious limitations:
- DDMS sets location for GPS location provider only. If your application uses network provider then you are out of luck.
- DDMS can set location for an emulator device only. You can not do testing using a real device.
If you need to test with real device or using the network location provider, you will need to develop a mock provider within the application. A mock provider can represent any location provider – network or GPS. Writing a mock provider itself is easy. Just be careful about removing the feature before publishing your application.
In this article, we will see how to create a mock location provider.
First, we will develop a class that will encapsulate the details:
public class MockLocationProvider {
String providerName;
Context ctx;
public MockLocationProvider(String name, Context ctx) {
this.providerName = name;
this.ctx = ctx;
LocationManager lm = (LocationManager) ctx.getSystemService(
Context.LOCATION_SERVICE);
lm.addTestProvider(providerName, false, false, false, false, false,
true, true, 0, 5);
lm.setTestProviderEnabled(providerName, true);
}
public void pushLocation(double lat, double lon) {
LocationManager lm = (LocationManager) ctx.getSystemService(
Context.LOCATION_SERVICE);
Location mockLocation = new Location(providerName);
mockLocation.setLatitude(lat);
mockLocation.setLongitude(lon);
mockLocation.setAltitude(0);
mockLocation.setTime(System.currentTimeMillis());
lm.setTestProviderLocation(providerName, mockLocation);
}
public void shutdown() {
LocationManager lm = (LocationManager) ctx.getSystemService(
Context.LOCATION_SERVICE);
lm.removeTestProvider(providerName);
}
}
A brief description of the MockLocationProvider class may be helpful:
- The constructor takes the name of the location provider that this mock provider will replace. For example, LocationManager.GPS_PROVIDER. The calls to the addTestProvider() and setTestProviderEnabled() tells the LocationManager that the given provider will be replaced by mock data.
- The pushLocation() method supplies mock location data for a given provider.
Any activity or service can easily use the class. Here, we are replacing the network provider with a mock one.
public class MainActivity extends Activity {
MockLocationProvider mock;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mock = new MockLocationProvider(LocationManager.NETWORK_PROVIDER, this);
//Set test location
mock.pushLocation(-12.34, 23.45);
LocationManager locMgr = (LocationManager)
getSystemService(LOCATION_SERVICE);
LocationListener lis = new LocationListener() {
public void onLocationChanged(Location location) {
//You will get the mock location
}
//...
};
locMgr.requestLocationUpdates(
LocationManager.NETWORK_PROVIDER, 1000, 1, lis);
}
protected void onDestroy() {
mock.shutdown();
super.onDestroy();
}
}
Setting up Security
For mock location to work, certain permissions have to be set.
You will need to request the android.permission.ACCESS_MOCK_LOCATION permission, in addition to any other permission.
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/> <uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION"/>
Finally, you will need to enable mock locations for the device using Settings > Developer options > Allow mock locations.
Disabling Mock Location
It is important that you hide the mock location provider business from the release build. A good way to do that is to enable mock location only if the application is being run in debug mode. In your code, check if debuggable flag is set:
if ((getApplication().getApplicationInfo().flags &
ApplicationInfo.FLAG_DEBUGGABLE) != 0) {
mock = new MockLocationProvider(
LocationManager.NETWORK_PROVIDER, this);
//Set test location
mock.pushLocation(-12.34, 23.45);
}
When you test the app using USB debugging or using the emulator, the debug flag is set automatically.