在android中无法执行警报对话框中的片段事务
在android中无法执行警报对话框中的片段事务
提问于 2017-06-20 10:32:18
我有一个片段，其中我有谷歌地图，我试图将这个片段保存在一个警报对话框中。但这绝不是接受。
首先，它不允许我在对话框中允许v4片段。我甚至试图通过构造函数传递这个v4片段对象。
我收到一个错误，说该活动不应该有构造函数!！这是多么令人沮丧!！
这是我的片段代码：
package com.motowala.AfterLogin;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapView;
import com.google.android.gms.maps.MapsInitializer;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import com.acs.R;
public class MapDialogFragment extends Fragment implements OnMapReadyCallback {
View v;
MapView googleMapView;
GoogleMap googleMap;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
v = inflater.inflate(R.layout.google_map_fragment, container, false);
return v;
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
googleMapView=(MapView)v.findViewById(R.id.google_map_view);
googleMapView.onCreate(null);
googleMapView.onResume();
googleMapView.getMapAsync(this);
}
@Override
public void onMapReady(GoogleMap googleMap) {
MapsInitializer.initialize(getActivity());
this.googleMap=googleMap;
googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
googleMap.addMarker(new MarkerOptions().position(new LatLng(16,80)));
}
}我用于片段布局的代码如下
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:name="com.acs.AlertAndProgressDialogs.GoogleMapLocationPicker"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<com.google.android.gms.maps.MapView
android:id="@+id/google_map_view"
android:layout_width="match_parent"
android:layout_height="match_parent">
</com.google.android.gms.maps.MapView>
</FrameLayout>我用于警报对话框的代码如下：
package com.acs.AlertAndProgressDialogs;
import android.app.Dialog;
import android.app.DialogFragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import com.google.android.gms.maps.MapView;
import com.acs.AfterLogin.MapDialogFragment;
import com.acs.R;
public class GoogleMapLocationPicker extends DialogFragment {
View layout;
MapView mapView;
MapDialogFragment googleMapFragment;
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
LayoutInflater inflater = getActivity().getLayoutInflater();
layout = inflater.inflate(R.layout.google_map_frag_dialog, null);
googleMapFragment=new MapDialogFragment();
FragmentManager manager=getActivity().getFragmentManager();
FragmentTransaction transaction=manager.beginTransaction();
transaction.replace(R.id.map_replacable_frag,googleMapFragment);
/* This is where I'm ending with error. It is saying it requires a fragment
object but it found object of type MapDialogFragment.
I have even tried using getChildFragmentManager() even that is also not
working at here.*/
}
}提前谢谢..。
回答 2
Stack Overflow用户
回答已采纳
发布于 2017-06-20 11:13:53
我为你的problem..Tested找到了一个解决方案，它正在起作用。
以下是代码：
public class GoogleMapLocationPicker extends DialogFragment implements OnMapReadyCallback {
View layout;
MapView mapView;
GoogleMap googleMap;
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
LayoutInflater inflater = getActivity().getLayoutInflater();
layout = inflater.inflate(R.layout.google_map_frag_dialog, null);
mapView = (MapView) layout.findViewById(R.id.google_map_view);
AlertDialog.Builder builder=new AlertDialog.Builder(getActivity());
builder.setView(layout);
return builder.create();
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
mapView.onCreate(null);
mapView.onResume();
mapView.getMapAsync(this);
}
@Override
public void onMapReady(GoogleMap googleMap) {
Toast.makeText(getActivity(), "Map ready...", Toast.LENGTH_SHORT).show();
MapsInitializer.initialize(getActivity());
this.googleMap=googleMap;
googleMap.setMapType(GoogleMap.MAP_TYPE_TERRAIN);
googleMap.addMarker(new MarkerOptions().position(new LatLng(16,80)));
}
}这个对话框随图而来。希望这会有所帮助:)
Stack Overflow用户
发布于 2017-06-20 10:44:34
你试图实现这一错误的方式。不能用对话框片段替换v4片段。首先，在对话框片段中使用google是不可取的，但是如果仍然想以这种方式使用它，则应该使用自定义的对话框片段。
试试这个：
public class CustomDialogFragment extends DialogFragment {
/** The system calls this to get the DialogFragment's layout, regardless
of whether it's being displayed as a dialog or an embedded fragment. */
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout to use as dialog or embedded fragment
return inflater.inflate(R.layout.yourmaplayout, container, false);
}
/** The system calls this only when creating the layout in a dialog. */
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// The only reason you might override this method when using onCreateView() is
// to modify any dialog characteristics. For example, the dialog includes a
// title by default, but your custom layout might not need it. So here you can
// remove the dialog title, but you must call the superclass to get the Dialog.
Dialog dialog = super.onCreateDialog(savedInstanceState);
dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
return dialog;
}
}然后显示对话框：
FragmentManager fragmentManager = getSupportFragmentManager();
CustomDialogFragment newFragment = new CustomDialogFragment();
newFragment.show(fragmentManager, "dialog");页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/44650621
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