单击注销按钮时，通过 http post 在我的数据库中将标志设置为零，但我在同一页面 (MainActivity.Java) 中实现了位置监听器，因此当更新位置时，它将数据库中的标志值更改为1. 我的问题是，即使在我单击注销按钮后，一些挂起的位置值也会传递到网络服务器，因此标志会变为 1。我的问题是，如何在单击“注销”按钮后停止位置列表器发送挂起的值？
下面是我使用 LocationListner 实现的“MainActivity.java”，注销按钮也存在于同一类中。
public class MainActivity extends Activity implements LocationListener
{
LocationManager locationManager;
String latitude;
String longitude;
String reverseString=null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView txtLoc = (TextView) findViewById(R.id.textView1);
final int pswd= SaveSharedPreference.getUserId(getBaseContext());
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);
try
{
if (SaveSharedPreference.getVehiclenm(getBaseContext()).length()>0)
{
final String vname=SaveSharedPreference.getVehiclenm(getBaseContext());
// Log.v("Set vname",""+vname);
TextView setuser=(TextView) findViewById(R.id.vname);
setuser.setText(vname);
}
if (SaveSharedPreference.getVhColor(getBaseContext()).length()>0)
{
final String vclr=SaveSharedPreference.getVhColor(getBaseContext());
// Log.v("Set vcolor",""+vclr);
TextView setvclr=(TextView) findViewById(R.id.vcolor);
setvclr.setText(vclr);
}
if (SaveSharedPreference.getNumPlate(getBaseContext()).length()>0)
{
final String vplate=SaveSharedPreference.getNumPlate(getBaseContext());
// Log.v("Set vplate",""+vplate);
TextView setvplt=(TextView) findViewById(R.id.nplate);
setvplt.setText(vplate);
}
}
catch (Exception e) {
Log.e("my error", e.toString());
}
Button lgt= (Button) findViewById(R.id.btn_lgt);
lgt.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
new Thread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(ServerConnection.ip+"logout.jsp");
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
// Log.v("pswd id for logout:",""+pswd);
nameValuePairs.add(new BasicNameValuePair("password", ""+pswd));
try {
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
ResponseHandler<String> responseHandler = new BasicResponseHandler();
String response = httpclient.execute(httppost, responseHandler);
reverseString = response.trim();
// Log.v("Response device id from logout",reverseString);
}
catch (Exception e) {
// Log.e("logout error:",e.toString());
runOnUiThread(new Runnable()
{
@Override
public void run()
{
if (AppStatus.getInstance(getBaseContext()).isOnline(getBaseContext())) {
Toast.makeText(getBaseContext(), "Logout Error", Toast.LENGTH_SHORT).show();
}
else {
Toast.makeText(getBaseContext(), "Connection Error", Toast.LENGTH_SHORT).show();
}
} });
}
if(reverseString!=null){
SaveSharedPreference.clearUserDetails(getBaseContext());
Intent myIntent= new Intent (getBaseContext(),login.class);
startActivity(myIntent);
finish();
}
}
}).start();
}
});
}
@Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
TextView txtLoc = (TextView) findViewById(R.id.textView1);
if(latitude==String.valueOf(location.getLatitude())&&longitude==String.valueOf(location.getLongitude()))
{
return;
}
latitude=String.valueOf(location.getLatitude());
longitude=String.valueOf(location.getLongitude());
final int driver_id=SaveSharedPreference.getUserId(getBaseContext());
Thread thread = new Thread() {
@Override
public void run() {
//JSONObject j = new JSONObject();
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(ServerConnection.ip+"updatedata.jsp");
try {
//j.put("lat",latitude);
//j.put("lon", longitude);
//Toast.makeText(getBaseContext(), ""+j.toString(), Toast.LENGTH_LONG).show();
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(3);
nameValuePairs.add(new BasicNameValuePair("lat", latitude));
nameValuePairs.add(new BasicNameValuePair("lon", longitude));
nameValuePairs.add(new BasicNameValuePair("password", ""+pswd));
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
// Execute HTTP Post Request
ResponseHandler<String> responseHandler = new BasicResponseHandler();
String response = httpclient.execute(httppost, responseHandler);
//This is the response from a jsp application
String reverseString = response.trim();
// Log.v("Response of password",reverseString);
//Toast.makeText(this, "response" + reverseString, Toast.LENGTH_LONG).show();
} catch (Exception e) {
Log.e("jsonLocation 0:",e.toString());
}
}
};
thread.start();
// Log.d("Test","test");
//txtLat.setText(location.getLatitude().+location.getLongitude());
}
@Override
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
// Log.d("Latitude", "disable");
Toast.makeText(getBaseContext(), "Please turn on GPS", Toast.LENGTH_SHORT).show();
Intent gpsOptionsIntent = new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(gpsOptionsIntent);
}
@Override
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
// Log.d("Latitude","enable");
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
// TODO Auto-generated method stub
// Log.d("Latitude","status");
}
}
单击注销按钮后，如何阻止位置列表器向网络服务器发送挂起的位置值？
任何一段代码都会受到赞赏，因为我是 Android 新手，并提前致谢。
最佳答案
当您注销时，您需要告诉LocationManager您不再需要更新。类似的东西——
locationManager.removeUpdates(MainActivity.this)
在注销按钮中onClickListener。
关于java - 当我单击注销按钮时，如何阻止 Android 应用程序将挂起位置发送到网络服务器？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/26569534/