Android practice-Location-Based Services (get the longitude and latitude of your location + Baidu map) and android longitude and latitude

Android practice-Location-Based Services (get the longitude and latitude of your location + Baidu map) and android longitude and latitude

The LocationManager class must be used for implementation. The following code is used:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/edit"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

The. java code is as follows:

package org.lxh.demo;

import java.util.List;

import android.app.Activity;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;

public class Hello extends Activity {
private TextView textView;
private LocationManager locationManager;
private String provider;

public void onCreate (Bundle savedInstanceState) {
super.onCreate (savedInstanceState); // Lifecycle method

super.setContentView (R.layout.main); // Set the layout manager to be used
Log.d ("111111", "4444444");
textView = (TextView) findViewById (R.id.edit);
locationManager = (LocationManager) getSystemService (Context.LOCATION_SERVICE);
List <String> providerList = locationManager.getProviders (true); // Get all available location providers
if (providerList.contains (LocationManager.GPS_PROVIDER)) {
provider = LocationManager.GPS_PROVIDER;
} else if (providerList.contains (LocationManager.NETWORK_PROVIDER)) {
provider = LocationManager.NETWORK_PROVIDER;
Log.d ("111111", "3333333");

} else {
Toast.makeText (this, "No location provider to use!",
Toast.LENGTH_SHORT) .show ();
return;
}
Location location = locationManager.getLastKnownLocation (provider);
if (location! = null) {
showLocation (location);
}
locationManager.requestLocationUpdates (provider, 5000, 1,
locationListener);

}

private void showLocation (Location location) {
String crrrentPositionString = "latitude is" + location.getLatitude ()
+ "\ n" + "longitude is" + location.getLongitude ();
textView.setText (crrrentPositionString);

}

LocationListener locationListener = new LocationListener () {

public void onStatusChanged (String provider, int status, Bundle extras) {
// TODO Auto-generated method stub

}

public void onProviderEnabled (String provider) {
// TODO Auto-generated method stub

}

public void onProviderDisabled (String provider) {
// TODO Auto-generated method stub

}

public void onLocationChanged (Location location) {
showLocation (location); // Update the current device information
Log.d ("111111", "222222");

}
};

protected void onDestroy () {
super .onDestroy ();
if (locationManager! = null) {
locationManager.removeUpdates (locationListener);
}
};
}

The AndroidManifest. xml Code is as follows:

<?xml version="1.0" encoding="utf-8"?>
<manifest 
	xmlns:android="http://schemas.android.com/apk/res/android"
	package="org.lxh.demo" 
	android:versionCode="1" 
	android:versionName="1.0">
	<uses-sdk android:minSdkVersion="10" />
	<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/><!-- 声明权限 -->
	<application 
		android:icon="@drawable/icon" 
		android:label="@string/app_name">
		<activity 
			android:name=".Hello" 
			android:label="@string/app_name">
			<intent-filter>
				<action android:name="android.intent.action.MAIN" />
				<category android:name="android.intent.category.LAUNCHER" />
			</intent-filter>
		</activity>
	</application>
	
</manifest>

Run the instance to display your current longitude and latitude. The following describes how to use Baidu map:

First, you need to apply for an API Key. You can use Baidu to download the jar package after completing all the operations:

Import the SDK:

Then set the layout file:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <com.baidu.mapapi.map.MapView
        android:id="@+id/map_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:clickable="true" />

</LinearLayout>

 

	
  


 

Then modify the MainActivity. java file:

package com.example.baidumaptest;

import java.util.List;

import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.widget.Toast;

import com.baidu.mapapi.BMapManager;
import com.baidu.mapapi.map.LocationData;
import com.baidu.mapapi.map.MapController;
import com.baidu.mapapi.map.MapView;
import com.baidu.mapapi.map.MyLocationOverlay;
import com.baidu.mapapi.map.PopupClickListener;
import com.baidu.mapapi.map.PopupOverlay;
import com.baidu.platform.comapi.basestruct.GeoPoint;

public class MainActivity extends Activity {

private BMapManager manager;

private MapView mapView;

private LocationManager locationManager;

private String provider;

@Override
protected void onCreate (Bundle savedInstanceState) {
super.onCreate (savedInstanceState);
manager = new BMapManager (this);
// API Key needs to be replaced with your own
manager.init ("SHVPoTtIpzfonPD3HCkc5sIt", null);
setContentView (R.layout.activity_main);
mapView = (MapView) findViewById (R.id.map_view);
mapView.setBuiltInZoomControls (true);
locationManager = (LocationManager) getSystemService (Context.LOCATION_SERVICE);
// Get all available location providers
List <String> providerList = locationManager.getProviders (true);
if (providerList.contains (LocationManager.GPS_PROVIDER)) {
provider = LocationManager.GPS_PROVIDER;
} else if (providerList.contains (LocationManager.NETWORK_PROVIDER)) {
provider = LocationManager.NETWORK_PROVIDER;
} else {
// When no location provider is available, pop up Toast to prompt the user
Toast.makeText (this, "No location provider to use",
Toast.LENGTH_SHORT) .show ();
return;
}
Location location = locationManager.getLastKnownLocation (provider);
if (location! = null) {
navigateTo (location);
}
}

private void navigateTo (Location location) {
MapController controller = mapView.getController ();
// Set the zoom level
controller.setZoom (16);
GeoPoint point = new GeoPoint ((int) (location.getLatitude () * 1E6),
(int) (location.getLongitude () * 1E6));
// Set the center point of the map
controller.setCenter (point);
MyLocationOverlay myLocationOverlay = new MyLocationOverlay (mapView);
LocationData locationData = new LocationData ();
// specify my location
locationData.latitude = location.getLatitude ();
locationData.longitude = location.getLongitude ();
myLocationOverlay.setData (locationData);
mapView.getOverlays (). add (myLocationOverlay);
// refresh for the new overlay to take effect
mapView.refresh ();
PopupOverlay pop = new PopupOverlay (mapView, new PopupClickListener () {
@Override
public void onClickedPopup (int index) {
// Click event of corresponding image
Toast.makeText (MainActivity.this,
"You clicked button" + index, Toast.LENGTH_SHORT)
.show ();
}
});
// create a Bitmap array of length 3
Bitmap [] bitmaps = new Bitmap [3];
try {
// read three pictures into memory
bitmaps [0] = BitmapFactory.decodeResource (getResources (),
R.drawable.left);
bitmaps [1] = BitmapFactory.decodeResource (getResources (),
R.drawable.middle);
bitmaps [2] = BitmapFactory.decodeResource (getResources (),
R.drawable.right);
} catch (Exception e) {
e.printStackTrace ();
}
pop.showPopup (bitmaps, point, 18);
}

@Override
protected void onDestroy () {
mapView.destroy ();
if (manager! = null) {
manager.destroy ();
manager = null;
}
super.onDestroy ();
}

@Override
protected void onPause () {
mapView.onPause ();
if (manager! = null) {
manager.stop ();
}
super.onPause ();
}

@Override
protected void onResume () {
mapView.onResume ();
if (manager! = null) {
manager.start ();
}
super.onResume ();
}

}

Configure the AndroidManifest. xml file:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.baidumaptest"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="14"
        android:targetSdkVersion="17" />

    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WRITE_SETTINGS" />
    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
    <uses-permission android:name="android.permission.CALL_PHONE" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_GPS" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.baidumaptest.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

Running instance: