我有一个Android活动正在启动子活动，该活动在surfaceview上运行Sygic导航。
启动子活动效果很好，导航启动。但是，当他们退出Sygic应用程序时，我想关闭子活动并返回显示父活动。如您所见，在Finish（）方法中，我尝试调用this.finish（）;和getParent（）。finish（）;但是两个都没有工作。它只是显示黑屏，我猜是表面视图。我有什么想法可以让它成功关闭子活动并再次显示父活动？
以下是启动子活动的代码：
NavigationActivity.SygicModule = this;
Log("Creating intent for navigation activity");
Intent intent = new Intent(getActivity(), NavigationActivity.class);
Log("Starting navigation activity");
getActivity().startActivity(intent);
以下是子导航活动视图的xml：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/layout">
<SurfaceView android:id="@+id/surfaceView" android:layout_height="match_parent" android:layout_width="match_parent"></SurfaceView>
</LinearLayout>
这是儿童导航活动的代码：
package ti.sygic;
public class NavigationActivity extends SygicDriveActivity {
private static final String LCAT = "SygicModule";
private static SError error = new SError();
private static Activity currentActivity = null;
public static SygicModule SygicModule;
private Handler mHandler = new Handler();
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
currentActivity = this;
super.onCreate(savedInstanceState);
try {
setContentView(TiRHelper.getApplicationResource("layout.sygicmain"));
final ApiCallback apicallback = new ApiCallback() {
public void onRunDrive() {
try {
final SurfaceView surface = (SurfaceView) findViewById(TiRHelper.getApplicationResource("id.surfaceView"));
mHandler.post(new Runnable() {
public void run() {
runDrive(surface, getPackageName()); // starts the drive app
}
});
} catch (ResourceNotFoundException e) {
// TODO Auto-generated catch block
Log("Failed to find id.surfaceView!");
e.printStackTrace();
} // surface
}
public void onInitApi() // gets called after runDrive();
{
// code to make sure that gps is enabled before initializing
Log("Checking that gps is enabled");
String provider = "com.android.settings.widget.SettingsAppWidgetProvider";
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.NO_REQUIREMENT);
criteria.setPowerRequirement(Criteria.NO_REQUIREMENT);
criteria.setCostAllowed(false);
ContentResolver contentResolver = getContentResolver();
if (!Settings.Secure.isLocationProviderEnabled(contentResolver, LocationManager.GPS_PROVIDER)) {
Log("Gps is not enabled, showing gps settings");
final Intent poke = new Intent();
poke.setClassName("com.android.settings", provider);
poke.addCategory(Intent.CATEGORY_ALTERNATIVE);
poke.setData(Uri.parse("3"));
sendBroadcast(poke);
}
int status = ApplicationAPI.InitApi(getPackageName(), true, msgHandler); // api initialization
Log("Status = " + Integer.toString(status));
if (status != 1) {
Log("InitApi failed! " + status);
}
else {
//start checking every second if application is running. if it isn't then finish this and parent activities.
//note: we wouldn't have to do this if APP_EXIT event actually fired. :(
CheckIfRunning();
}
}
};
ApplicationAPI.startDrive(apicallback);
} catch (ResourceNotFoundException e1) {
Log("Failed to find resource!");
e1.printStackTrace();
}
}
public static void navigateTo(Float latitude, Float longitude) {
try
{
Log("navigateTo: " + latitude + " / " + longitude);
Integer lat = (int)(latitude * 100000);
Integer lon = (int)(longitude * 100000);
//start navigation.
Log("Starting navigation for " + lat + " / " + lon);
SWayPoint wayPoint = new SWayPoint();
wayPoint.SetLocation(lat, lon);
ApplicationAPI.StartNavigation(error, wayPoint, 0, true, true, 0);//NavigationParams.NpMessageAvoidTollRoadsUnable
Log("Start navigation result: " + error.nCode + " " + error.GetDescription());
//if waiting for gps, call in a bit.
if(error.nCode == -6)
{
Thread.sleep(5000);
navigateTo(latitude, longitude);
}
}
catch(Exception exc)
{
Log(exc.getMessage());
}
}
final ApplicationHandler msgHandler = new ApplicationHandler() {
@Override
public void onApplicationEvent(int nEvent, String strData) {
Log("Event No. " + Integer.toString(nEvent) + " detected."); // event handling
switch (nEvent) {
case ApplicationEvents.EVENT_APP_EXIT:
Log("In EVENT_APP_EXIT event");
Finish();
break;
case ApplicationEvents.EVENT_WAIPOINT_VISITED:
Log("Waypoint visited.");
break;
case ApplicationEvents.EVENT_ROUTE_COMPUTED:
Log("Route computed.");
break;
case ApplicationEvents.EVENT_ROUTE_FINISH:
Log("Route finished.");
break;
case ApplicationEvents.EVENT_POI_WARNING:
Log("Poi warning!.");
break;
case ApplicationEvents.EVENT_CHANGE_LANGUAGE:
Log("Language changed.");
break;
case ApplicationEvents.EVENT_EXIT_MENU:
Log("Menu exited.");
break;
case ApplicationEvents.EVENT_MAIN_MENU:
Log("Entering main menu.");
break;
case ApplicationEvents.EVENT_BORDER_CROSSING:
Log("Crossing border.");
}
}
};
private void CheckIfRunning()
{
new Thread(new Runnable() {
@Override
public void run() {
try
{
int numTimesNotRunning = 0;
while(true)
{
boolean isRunning = ApplicationAPI.IsApplicationRunning(error, 0) == 1;
if(isRunning)
{
Log("App is running, will check again in 2 seconds");
numTimesNotRunning = 0;
Thread.sleep(2000);
}
else {
if(numTimesNotRunning < 3)
{
numTimesNotRunning++;
Log("App not running, num times " + numTimesNotRunning);
Thread.sleep(2000);
}
else
break;
}
}
Log("App is not running, calling sygicmodule finish!");
Finish();
}
catch(Exception exc)
{
Log(exc.getMessage());
}
}
}).start();
}
private void Finish()
{
Log("In NavigationActivity Finish");
runOnUiThread(new Runnable() {
public void run() {
try
{
//launch parent activity.
Log("Starting parent activity");
Intent intent = new Intent(currentActivity, SygicModule.getActivity().getClass());
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
currentActivity.startActivity(intent);
//finish current activity.
Log("Finishing activity");
//setContentView(null);
currentActivity.finish();
}
catch(Exception exc)
{
Log(exc.getMessage());
}
}
});
}
private static void Log(String message) {
//org.appcelerator.kroll.common.Log.i(LCAT, message);
if(message != null && message.length() > 0)
android.util.Log.i(LCAT, message);
}
}
答案 0 :(得分：2)
您必须引用父活动，而不是仅调用finish();
即。 YourActivityClassName.this.finish();
会导致您的活动完成，请务必在DriveEvent.EVENT_APP_EXIT上添加此调用，并且您的活动应在Sygic退出后关闭