我正在尝试开始使用mapbox android，并且无法使任何示例项目正常工作。
我的问题是与进口有关
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import com.mapbox.mapboxandroiddemo.R;
我得到“无法解析符号注释”，“无法解析符号v7”和“无法解析符号mapboxandroiddemo”的信息。
我觉得这是一个Android问题，我只是无法正确理解，所以如果有人有一些很棒的见解。我尝试删除一些代码并使用建议的错误修复程序，但所做的一切都破坏了我的项目。
这是整个MainActivity.java文件
package com.example.mapboxtut;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import androidx.appcompat.app.AppCompatActivity;
import com.mapbox.geojson.Feature;
import com.mapbox.geojson.FeatureCollection;
import com.mapbox.geojson.Point;
import com.mapbox.mapboxandroiddemo.R;
import com.mapbox.mapboxsdk.Mapbox;
import com.mapbox.mapboxsdk.maps.MapView;
import com.mapbox.mapboxsdk.maps.MapboxMap;
import com.mapbox.mapboxsdk.maps.OnMapReadyCallback;
import com.mapbox.mapboxsdk.maps.Style;
import com.mapbox.mapboxsdk.style.layers.SymbolLayer;
import com.mapbox.mapboxsdk.style.sources.GeoJsonSource;
import com.mapbox.mapboxsdk.utils.BitmapUtils;
import static com.mapbox.mapboxsdk.style.expressions.Expression.get;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconAllowOverlap;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconIgnorePlacement;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.iconImage;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textAllowOverlap;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textField;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textIgnorePlacement;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.textOffset;
/**
* Use the {@link MapView#addOnStyleImageMissingListener(MapView.OnStyleImageMissingListener)}
* to handle the situation where a SymbolLayer tries using a missing image as an icon. If an icon-image
* cannot be found in a map style, a custom image can be provided to the map via
* the listener.
*/
public class MissingIconActivity extends AppCompatActivity {
private static final String ICON_SOURCE_ID = "ICON_SOURCE_ID";
private static final String ICON_LAYER_ID = "ICON_LAYER_ID";
private static final String PROFILE_NAME = "PROFILE_NAME";
private static final String CARLOS = "Carlos";
private static final String ANTONY = "Antony";
private static final String MARIA = "Maria";
private static final String LUCIANA = "Luciana";
private MapView mapView;
private MapboxMap mapboxMap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Mapbox access token is configured here. This needs to be called either in your application
// object or in the same activity which contains the mapview.
Mapbox.getInstance(this, getString(R.string.access_token));
// This contains the MapView in XML and needs to be called after the access token is configured.
setContentView(R.layout.activity_styles_missing_icon);
mapView = findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(new OnMapReadyCallback() {
@Override
public void onMapReady(@NonNull final MapboxMap mapboxMap) {
// Add Features which represent the location of each profile photo SymbolLayer icon
Feature carlosFeature = Feature.fromGeometry(Point.fromLngLat(-7.9760742,
41.2778064));
carlosFeature.addStringProperty(PROFILE_NAME, CARLOS);
Feature antonyFeature = Feature.fromGeometry(Point.fromLngLat(-8.0639648,
37.5445773));
antonyFeature.addStringProperty(PROFILE_NAME, ANTONY);
Feature mariaFeature = Feature.fromGeometry(Point.fromLngLat(-9.1845703,
38.9764924));
mariaFeature.addStringProperty(PROFILE_NAME, MARIA);
Feature lucianaFeature = Feature.fromGeometry(Point.fromLngLat(-7.5146484,
40.2459915));
lucianaFeature.addStringProperty(PROFILE_NAME, LUCIANA);
// Use a URL to build and add a Style object to the map. Then add a source to the Style.
mapboxMap.setStyle(
new Style.Builder().fromUrl(Style.LIGHT)
.withSource(new GeoJsonSource(ICON_SOURCE_ID,
FeatureCollection.fromFeatures(new Feature[] {
carlosFeature,
antonyFeature,
mariaFeature,
lucianaFeature}))),
new Style.OnStyleLoaded() {
@Override
public void onStyleLoaded(@NonNull Style style) {
MissingIconActivity.this.mapboxMap = mapboxMap;
// Add a SymbolLayer to the style. iconImage is set to a value that will
// be used later in the addOnStyleImageMissingListener below
style.addLayer(new SymbolLayer(ICON_LAYER_ID, ICON_SOURCE_ID).withProperties(
iconImage(get(PROFILE_NAME)),
iconIgnorePlacement(true),
iconAllowOverlap(true),
textField(get(PROFILE_NAME)),
textIgnorePlacement(true),
textAllowOverlap(true),
textOffset(new Float[] {0f, 2f})
));
}
});
}
});
// Use the listener to match the id with the appropriate person. The correct profile photo is
// given to the map during "runtime".
mapView.addOnStyleImageMissingListener(new MapView.OnStyleImageMissingListener() {
@Override
public void onStyleImageMissing(@NonNull String id) {
switch (id) {
case CARLOS:
addImage(id, R.drawable.carlos);
break;
case ANTONY:
addImage(id, R.drawable.antony);
break;
case MARIA:
addImage(id, R.drawable.maria);
break;
case LUCIANA:
addImage(id, R.drawable.luciana);
break;
default:
addImage(id, R.drawable.carlos);
break;
}
}
});
}
private void addImage(String id, int drawableImage) {
Style style = mapboxMap.getStyle();
if (style != null) {
style.addImageAsync(id, BitmapUtils.getBitmapFromDrawable(
getResources().getDrawable(drawableImage)));
}
}
// Add the mapView lifecycle to the activity's lifecycle methods
@Override
public void onResume() {
super.onResume();
mapView.onResume();
}
@Override
protected void onStart() {
super.onStart();
mapView.onStart();
}
@Override
protected void onStop() {
super.onStop();
mapView.onStop();
}
@Override
public void onPause() {
super.onPause();
mapView.onPause();
}
@Override
public void onLowMemory() {
super.onLowMemory();
mapView.onLowMemory();
}
@Override
protected void onDestroy() {
super.onDestroy();
mapView.onDestroy();
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mapView.onSaveInstanceState(outState);
}
}