所以我想在用户点击“添加圈子”按钮时将对象添加到我有地图的地图,但是当我尝试从xml获取地图时,我会在{{{{{{{{{{{ 1}} .getmap()
下的任何修复或解决方法?示例代码很有用。
newCircle()
的xml:
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import com.google.android.gms.maps.*;
import com.google.android.gms.maps.model.CircleOptions;
import com.google.android.gms.maps.model.LatLng;
public class GoogleMaps extends FragmentActivity {
GoogleMap mMap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_google_maps);
makeCircleButton();
}
private void makeCircleButton() {
OnClickListener onClickListener = new OnClickListener() {
@Override
public void onClick(View v) {
newCircle();
}
};
Button button = (Button) findViewById(R.id.add_circular_area);
button.setOnClickListener(onClickListener);
}
public void newCircle() {
mMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.map))
.getMap();
// Instantiates a new CircleOptions object and defines the center and
// radius
CircleOptions circleOptions = new CircleOptions().center(
new LatLng(37.4, -122.1)).radius(1000); // In meters
mMap.addCircle(circleOptions);
// Get back the mutable Circle
// Circle circle = mMap.addCircle(circleOptions);
}
xml include:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<include
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
layout="@layout/fragment" />
<ScrollView
android:id="@+id/map_scrollview"
android:layout_width="match_parent"
android:layout_height="100dp"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:fadingEdge="none"
android:scrollbarAlwaysDrawVerticalTrack="true" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<Button
android:id="@+id/button1"
android:layout_width="245dp"
android:layout_height="wrap_content"
android:text="Add rectangular area" />
<Button
android:id="@+id/add_circular_area"
android:layout_width="245dp"
android:layout_height="wrap_content"
android:text="Add circular area" />
</LinearLayout>
</ScrollView>
</RelativeLayout>
答案 0 :(得分:2)
您已将片段名称用作com.google.android.gms.maps.SupportMapFragment
,因此无法获取MapFragment
您应使用getSupportFragmentManager()
代替getFragmentManager()
并将其投放到SupportMapFragment
。
更改
mMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.map))
.getMap();
到
mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
.getMap();
希望它会有所帮助。