问题
Like the title says, I want to make a ViewPager which contains two sections:
1- a Listview (name of the places to go with PHP / MySQL / JSON)
2- and a GoogleMap with Markers depending of what you select in point 1
So, I have this code for a ListView and a second code for the GoogleMap with a location Button. I want to merge them in a ViewPager but I don't figure out how to make this possible. See my code below:
google class:
package com.bla;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import android.app.Activity;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import android.app.Activity;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
//extends FragmentActivity
public class google extends FragmentActivity implements LocationListener {
Button btnShowLocation;
// GPSTracker class
GPSTracker gps;
// GoogleMap googleMap;
LatLng myPosition;
private SupportMapFragment map;
private GoogleMap mMapView;
// add all necessary things
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_google);
// if Google Play Services are available then
// Getting reference to the SupportMapFragment of activity_main.xml
// SIRVE ... SupportMapFragment fm = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
/* fm = SupportMapFragment.newInstance();
FragmentTransaction fragmentTransaction =
getChildFragmentManager().beginTransaction();
fragmentTransaction.add(R.id.map, fm);
fragmentTransaction.commit(); */
// SupportMapFragment fm = (SupportMapFragment) getFragmentManager().findFragmentById(R.id.map);
FragmentManager fm = getSupportFragmentManager();
map = (SupportMapFragment) fm.findFragmentById(R.id.map);
if (map == null) {
map = SupportMapFragment.newInstance();
fm.beginTransaction().replace(R.id.map, map).commit();
}
// GoogleMap = mMapFragment.getMap();
// Getting GoogleMap object from the fragment
// mMapView = fm.getMap();
mMapView = map.getMap();
// Enabling MyLocation Layer of Google Map
mMapView.setMyLocationEnabled(true);
// Getting LocationManager object from System Service LOCATION_SERVICE
LocationManager locationManager = (LocationManager) getSystemService(LOCATION_SERVICE);
// Creating a criteria object to retrieve provider
Criteria criteria = new Criteria();
// Getting the name of the best provider
String provider = locationManager.getBestProvider(criteria, true);
// Getting Current Location
Location location = locationManager.getLastKnownLocation(provider);
if(location!=null){
// Getting latitude of the current location
double latitude = location.getLatitude();
// Getting longitude of the current location
double longitude = location.getLongitude();
// Creating a LatLng object for the current location
LatLng latLng = new LatLng(latitude, longitude);
myPosition = new LatLng(latitude, longitude);
mMapView.addMarker(new MarkerOptions().position(myPosition).title("Start"));
}
}
@Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
}
@Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
@Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
}
listview class:
package com.example.mysqltest;
import android.app.Activity;
import android.content.Context;
import android.location.Location;
import android.os.Bundle;
import android.os.Parcelable;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.TextView;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import android.app.Activity;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
import android.app.Activity;
import android.location.Criteria;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.view.View;
import android.widget.Button;
import com.example.mysqltest.R;
import com.viewpagerindicator.TabPageIndicator;
public class titlepager extends Activity {
// GoogleMap googleMap;
LatLng myPosition;
private SupportMapFragment map;
private GoogleMap mMapView;
//these are the titles that will appear on the "tabs"
final String[] page_titles = new String[]{"Home", "Me"};
//this will go the description TextView
final String[] desc = new String[]{
"Aqui ira el listview ",
"Aqui iraaa el mapa :D ",
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.title);
//Instantiating the adapter
GiloAdapter mAdapter = new GiloAdapter(this);
//instantiate the Views
ViewPager mPager = (ViewPager)findViewById(R.id.pager);
mPager.setAdapter(mAdapter);
TabPageIndicator mIndicator = (TabPageIndicator)findViewById(R.id.indicator);
mIndicator.setViewPager(mPager);
private class GiloAdapter extends PagerAdapter{
Context context;
public GiloAdapter(Context c){
this.context = c;
}
//This is the number of pages -- 5
@Override
public int getCount() {
// TODO Auto-generated method stub
return page_titles.length;
}
@Override
public boolean isViewFromObject(View v, Object o) {
// TODO Auto-generated method stub
return v.equals(o);
}
//This is the title of the page that will apppear on the "tab"
public CharSequence getPageTitle(int position) {
return page_titles[position];
}
//This is where all the magic happen
public Object instantiateItem(View pager, int position) {
final LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View v = inflater.inflate(R.layout.page, null, false);
View v2 = inflater.inflate(R.layout.page2, null, false);
TextView title = (TextView)v.findViewById(R.id.tvTitle);
TextView description = (TextView) v.findViewById(R.id.tvdesc);
title.setText(page_titles[position]);
description.setText(desc[position]);
//This is very important
( (ViewPager) pager ).addView( v, 0 );
( (ViewPager) pager ).addView( v2, 1 );
return v;
}
@Override
public void destroyItem(View pager, int position, Object view) {
((ViewPager) pager).removeView((View) view);
}
@Override
public void finishUpdate(View view) {
}
@Override
public void restoreState(Parcelable p, ClassLoader c) {
}
@Override
public Parcelable saveState() {
return null;
}
@Override
public void startUpdate(View view) {
}
}
}
Is there any options to merge these classes? Make a switch for every page and which layout to charge? I'm newer in Android, can you help me to know how do it?
回答1:
I've got three different fragments in a viewPager below. The example below is a dialogFragment but that doesn't make a difference it could be an activity or a fragment.
public class FragmentPagerSupport extends DialogFragment implements
OnPageChangeListener {
static int NUM_ITEMS = 3;
public interface FragmentPageRefresh {
void onRefresh();
}
MyAdapter mAdapter;
ViewPager mPager;
static FragmentPagerSupport newInstance(int startingPage) {
FragmentPagerSupport f = new FragmentPagerSupport();
// Supply num input as an argument.
Bundle args = new Bundle();
args.putInt("startingPage", startingPage);
f.setArguments(args);
return f;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
int startingPage = 0;
Bundle b = getArguments();
if (b != null) {
startingPage = b.getInt("startingPage");
}
View view = inflater.inflate(R.layout.fragment_pager, container);
mAdapter = new MyAdapter(this.getChildFragmentManager());
mPager = (ViewPager) view.findViewById(R.id.pager);
mPager.setAdapter(mAdapter);
mPager.setCurrentItem(startingPage);
mPager.setOnPageChangeListener(this);
getDialog().setTitle("Best Rides Settings");
return view;
}
public static class MyAdapter extends FragmentStatePagerAdapter {
// private Map<Integer, Fragment> mPageReferenceMap = new
// HashMap<Integer, Fragment>();
public MyAdapter(FragmentManager fm) {
super(fm);
}
@Override
public int getCount() {
return NUM_ITEMS;
}
@Override
public Fragment getItem(int position) {
Fragment ret = null;
switch (position) {
case 0:
ret = SettingMap.newInstance(position);
break;
case 1:
ret = SettingFollow.newInstance(position);
break;
case 2:
ret = SettingRecord.newInstance(position);
break;
}
// mPageReferenceMap.remove(position);
// mPageReferenceMap.put(position, ret);
return ret;
}
@Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "Map Type";
case 1:
return "Follow";
case 2:
return "Tracker";
default:
return "unused";
}
}
Here's how you do the ".newInstance" in the fragment.
public class SettingFollow extends Fragment implements
OnCheckedChangeListener,
android.widget.CompoundButton.OnCheckedChangeListener,
OnSeekBarChangeListener {
public static Fragment newInstance(int position) {
SettingFollow f = new SettingFollow();
// Supply num input as an argument.
Bundle args = new Bundle();
args.putInt("num", position);
f.setArguments(args);
return f;
}
...
}
simple layout
<?xml version="1.0" encoding="utf-8"?>
<!--
Copyright (C) 2010 The Android Open Source Project
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<!-- Top-level content view for the simple fragment sample. -->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/default_screen_bg"
android:orientation="vertical" >
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="0px"
android:layout_weight="1" >
<android.support.v4.view.PagerTitleStrip
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top" />
</android.support.v4.view.ViewPager>
</LinearLayout>
fire this beast up like this.
FragmentManager fm = getSupportFragmentManager();
FragmentPagerSupport editSettingsDialog = new FragmentPagerSupport();
// MapSettings editSettingsDialog = new MapSettings();
editSettingsDialog.show(fm, "fragment_edit_name");
来源：https://stackoverflow.com/questions/23571548/how-to-place-a-google-map-code-inside-a-viewpager