出现此问题可能是由于获取地图样式文档的路径错误或无法访问导致的。需要检查代码中获取地图样式文档的路径是否正确,并确认网络连接是否正常。以下是一个示例:
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import com.amazonaws.mobile.client.AWSMobileClient;
import com.amazonaws.mobile.config.AWSConfiguration;
import com.amazonaws.mobileconnectors.appsync.AWSAppSyncClient;
import com.amazonaws.mobileconnectors.appsync.fetcher.AppSyncResponseFetchers;
import com.amazonaws.mobileconnectors.mapbox.Mapbox;
public class MainActivity extends AppCompatActivity {
private AWSAppSyncClient mAWSAppSyncClient;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Initialize AWS services
AWSMobileClient.getInstance().initialize(this).execute();
AWSConfiguration awsConfiguration = new AWSConfiguration(this);
mAWSAppSyncClient = AWSAppSyncClient.builder()
.context(getApplicationContext())
.awsConfiguration(awsConfiguration)
.build();
// Initialize Mapbox and set style URL
Mapbox.getInstance(this, "Mapbox API key goes here");
String styleUrl = "https://my-mapbox-style-url.com/style.json";
Mapbox.getMapAsync(mapboxMap -> mapboxMap.setStyleUrl(styleUrl));
// Query data from AppSync
mAWSAppSyncClient.query(GetDataQuery.builder().build())
.responseFetcher(AppSyncResponseFetchers.CACHE_AND_NETWORK)
.enqueue(queryCallback);
}
private GraphQLCall.Callback<GetDataQuery.Data> queryCallback = new GraphQLCall.Callback<GetDataQuery.Data>() {
@Override
public void onResponse(@Nonnull Response<GetDataQuery.Data> response) {
// Handle response from AppSync
}
@Override
public void onFailure(@Nonnull ApolloException e) {
Log.e("Apollo", e.getMessage(), e);
}
};
}
在上述代码中,如果styleUrl
设置不正确或无法访问,则会导致获取地图样式文