应用程序从 GPS 获取位置后关闭！请帮忙！我已经使用
此代码来获取位置。但我仍然遇到问题！
MainActivity.java
package com.locationremind.app;
import android.app.Activity;
import android.content.Context;
import android.location.Location;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import com.locationremind.app.MyLocation.LocationResult;
public class LocationReminderActivity extends Activity {
//Location loc;
Context context;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
context=this;
Button btn_ok=(Button) findViewById(R.id.btn_set);
EditText txt_msg=(EditText) findViewById(R.id.txt_alarm);
String msg= txt_msg.getText().toString();
btn_ok.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
LocationResult locationResult = new LocationResult(){
@Override
public void gotLocation(Location location){
//Got the location
try {
Toast.makeText(context, "Location set to\n Latitude:"+location.getLatitude()+",Longitude:"+location.getLongitude(), Toast.LENGTH_LONG).show();
doWithLocation(location);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
Toast.makeText(context, "Error Finding Location"+e.getMessage(), Toast.LENGTH_LONG).show();
}
}};
MyLocation myLocation = new MyLocation();
myLocation.getLocation(context, locationResult);
};
});
}
public boolean doWithLocation(Location location) throws NullPointerException
{
if(location==null)
return false;
TextView tv_lat= (TextView) findViewById(R.id.tv_lat);
tv_lat.setVisibility(View.VISIBLE);
TextView tv_lat_value=(TextView) findViewById(R.id.tv_lat_value);
tv_lat_value.setText(Double.toString(location.getLatitude()));
tv_lat_value.setVisibility(View.VISIBLE);
TextView tv_long=(TextView) findViewById(R.id.tv_long);
tv_long.setVisibility(View.VISIBLE);
TextView tv_long_value=(TextView) findViewById(R.id.tv_long_value);
tv_long_value.setText(Double.toString(location.getLongitude()));
tv_long_value.setVisibility(View.VISIBLE);
//loc.set(location);
return true;
}
}
我的位置.java
package com.locationremind.app;
import java.util.Timer;
import java.util.TimerTask;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.widget.Toast;
public class MyLocation {
Timer timer1;
LocationManager lm;
LocationResult locationResult;
boolean gps_enabled=false;
boolean network_enabled=false;
Context con;
public boolean getLocation(Context context, LocationResult result)
{ con=context;
//I use LocationResult callback class to pass location value from MyLocation to user code.
locationResult=result;
if(lm==null)
lm = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
//exceptions will be thrown if provider is not permitted.
try{gps_enabled=lm.isProviderEnabled(LocationManager.GPS_PROVIDER);}catch(Exception ex){ex.printStackTrace();}
try{network_enabled=lm.isProviderEnabled(LocationManager.NETWORK_PROVIDER);}catch(Exception ex){ex.printStackTrace();}
//don't start listeners if no provider is enabled
if(!gps_enabled && !network_enabled)
return false;
if(gps_enabled)
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, locationListenerGps);
//if(network_enabled)
//lm.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 0, 0, locationListenerNetwork);
timer1=new Timer();
timer1.schedule(new GetLastLocation(), 60*2*1000);
return true;
}
LocationListener locationListenerGps = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
timer1.cancel();
locationResult.gotLocation(location);
lm.removeUpdates(this);
//lm.removeUpdates(locationListenerNetwork);
}
@Override
public void onProviderDisabled(String provider) {
Toast.makeText(con.getApplicationContext(), "Please enable GPS in Settings!", Toast.LENGTH_LONG).show();
Message msg = handler.obtainMessage();
msg.arg1 = 1;
handler.sendMessage(msg);
}
@Override
public void onProviderEnabled(String provider) {}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {}
};
private final Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
if(msg.arg1 == 1){
// Without this in certain cases application will show ANR
AlertDialog.Builder builder = new AlertDialog.Builder(con.getApplicationContext());
builder.setMessage("Your GPS is disabled! Would you like to enable it?").setCancelable(false).setPositiveButton("Enable GPS", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
Intent gpsOptionsIntent = new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS);
con.startActivity(gpsOptionsIntent);
}
});
builder.setNegativeButton("Do nothing", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alert = builder.create();
alert.show();
}
}
};
class GetLastLocation extends TimerTask {
@Override
public void run() {
lm.removeUpdates(locationListenerGps);
//lm.removeUpdates(locationListenerNetwork);
Location gps_loc=null;
if(gps_enabled)
gps_loc=lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
//if(network_enabled)
// net_loc=lm.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
//if there are both values use the latest one
if(gps_loc!=null){
//if(gps_loc.getTime()>net_loc.getTime())
locationResult.gotLocation(gps_loc);
//else
//locationResult.gotLocation(net_loc);
return;
}
//if(gps_loc!=null){
// locationResult.gotLocation(gps_loc);
//return;
//}
/*if(net_loc!=null){
locationResult.gotLocation(net_loc);
return;
}*/
//locationResult.gotLocation(null);
}
}
public static abstract class LocationResult{
public abstract void gotLocation(Location location);
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.locationremind.app"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".LocationReminderActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".NotificationClass"
android:label="YOU ARE IN PROXIMITY AREA!!!"
android:exported="false">
<intent-filter>
<action android:name="com.locationsensor.notif"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
</activity>
</application>
</manifest>
请帮忙。我已经在真正的手机上试过了，我在这里发帖。我不想使用网络位置。有什么建议么？