我有活动1和活动2.活动2有一个GeoCoder类（公共类GeoCoder扩展AsynTask）有什么方法可以从Activity 1执行GeoCoder类？
screen1.java
public class screen1 extends Activity implements View.OnClickListener {
ProgressDialog dialog, dialog2, dialog3;
LayoutInflater inflater;
SharedPreferences.Editor editor;
SharedPreferences preferences;
// Strings
String username, password, firstName, lastName, lastLatitudeUpdate;
int checkedin, Minute, Hour, Time;
Timer EnableLocationonResume;
Vibrator vib;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.screen1);
vib = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
///// Calls String from AgentPortalActivity class to pass through to screen1 class //////////////////////////////////////////////////////////////////////
Intent i = getIntent(); //
username = i.getExtras().getString("uid"); //
password = i.getExtras().getString("pwd"); ////// Boolean for Check-In Button Sharedpreferences/////////// //
firstName = i.getExtras().getString("firstName"); preferences = getPreferences(MODE_PRIVATE); // //
lastName = i.getExtras().getString("lastName"); final boolean tgpref; tgpref = preferences.getBoolean("tgpref", true); //
lastLatitudeUpdate = i.getExtras().getString("lastLatitudeUpdate"); checkinbutton.setChecked(tgpref); // //
checkedin = i.getExtras().getInt("checkedin"); /////////////////////////////////////////////////////////////// //
Minute = i.getExtras().getInt("Minute"); //
Hour = i.getExtras().getInt("Hour"); //
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////// Gets Time since last GPS Update and compares LastUpdate time to Current Time (-60 Minutes) and displays Update GPS status if nessecary //////////
SimpleDateFormat parserSDF=new SimpleDateFormat("M/d/yyyy h:m:s a"); // <--- Correct format to read "lastLatitudeUpdate" //
try { //
Date d = parserSDF.parse(lastLatitudeUpdate); //
//
Calendar now = Calendar.getInstance(); //
// Go back 1 Hour. //
now.add(Calendar.MINUTE, -60); //
Date HourAgo = now.getTime(); //
//
if (d.before(HourAgo)) { //
GPSUPDATE.setText("Please update your gps to stay current on standby list"); //
} //
} catch (java.text.ParseException e1) { //
// TODO Auto-generated catch block //
e1.printStackTrace(); //
} //
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// //////
//-------------------------------------------------------Checks to see if Driver is Currently Checked-In or Checked-Out and toggles checkinbutton respectively------------------------------------------------------//
//----------------------------------------------------------------------Also Changes "information.settext" to display either hello or goodbye-----------------------------------------------------------------------//
if (checkedin == 0) {
String text = "<font color=\"grey\"> You are currently Checked-Out </font>"; //
checkin.setText(Html.fromHtml(text), BufferType.SPANNABLE);
//
// Boolean Preferences for Checkinbutton ToggleButton Remembers Toggle State Checked
editor = preferences.edit(); //
checkinbutton.setChecked(false);
editor.putBoolean("tgpref", true); editor.commit(); //
information.setText("Thank you for todays hard work, " + (firstName) + " " + (lastName) + "!" + "\n" + " You have checked out for the day "); //
}
//
if (checkedin == 1) {
String text = "<font color=\"#A2E8\"> You are currently Checked-In </font>"; //
checkin.setText(Html.fromHtml(text), BufferType.SPANNABLE);
//
// Boolean Preferences for Checkinbutton ToggleButton Remembers Toggle State Checked
editor = preferences.edit(); //
checkinbutton.setChecked(true);
editor.putBoolean("tgpref", true); editor.commit(); //
information.setText("Welcome back, " + (firstName) + " " + (lastName) + "!" + "\n" + " Your last GPS update was on " + (lastLatitudeUpdate)); //
}//----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
/// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// /// //////
//-------------------------------------------------------Check IN ToggleButton-------------------------------------------------------//
checkinbutton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
vib.vibrate(40);
//---------------------------Only Displays Mile-in Zip-in and submitin Button---------------------------------------//
if (checkinbutton.isChecked()) { //
milein.setVisibility(View.VISIBLE); mileout.setVisibility(View.GONE); //
submitin.setVisibility(View.VISIBLE); submitout.setVisibility(View.GONE); //
CancelIN.setVisibility(View.VISIBLE); CancelOUT.setVisibility(View.GONE); //
zipin.setVisibility(View.VISIBLE); zipout.setVisibility(View.GONE); //
dispatch.setVisibility(View.GONE); dispatchnum.setVisibility(View.GONE); //
donotcallus.setVisibility(View.GONE); googletalk.setVisibility(View.GONE); //
csr.setVisibility(View.GONE); csrnum.setVisibility(View.GONE); //
it.setVisibility(View.GONE); itnum.setVisibility(View.GONE); //
thoughts.setVisibility(View.GONE); feed.setVisibility(View.GONE); //
send.setVisibility(View.GONE); information.setVisibility(View.GONE); //
checkinbutton.setEnabled(false); //
//------------------------------------------------------------------------------------------------------------------//
// Boolean Preferences for Checkinbutton ToggleButton Remembers Toggle State Checked
editor = preferences.edit();
preferences = getPreferences(MODE_PRIVATE);
checkinbutton.setChecked(tgpref); checkinbutton.setChecked(false);
editor.putBoolean("tgpref", true); editor.commit();
String text = "<font color=\"#CC0000\"> Checking-In... </font>";
checkin.setText(Html.fromHtml(text), BufferType.SPANNABLE);
} else {
mileout.setVisibility(View.VISIBLE); milein.setVisibility(View.GONE);
zipout.setVisibility(View.VISIBLE); zipin.setVisibility(View.GONE);
submitout.setVisibility(View.VISIBLE); submitin.setVisibility(View.GONE);
CancelOUT.setVisibility(View.VISIBLE); CancelIN.setVisibility(View.GONE);
dispatch.setVisibility(View.GONE); dispatchnum.setVisibility(View.GONE);
csr.setVisibility(View.GONE); csrnum.setVisibility(View.GONE);
it.setVisibility(View.GONE); itnum.setVisibility(View.GONE);
donotcallus.setVisibility(View.GONE); googletalk.setVisibility(View.GONE);
thoughts.setVisibility(View.GONE); feed.setVisibility(View.GONE);
send.setVisibility(View.GONE); information.setVisibility(View.GONE);
checkinbutton.setChecked(true);
vib.vibrate(80);
//-------------------------------------------------------Custom Layout View for Check-Out Checkbox-------------------------------------------------------//
inflater = getLayoutInflater();
final View checkboxLayout = inflater.inflate(R.anim.verify, null);
final CheckBox AgreeCheckBox = (CheckBox) checkboxLayout.findViewById(R.id.checkBox);
//-------------------------------------------------------AlertDialog Meal-Periods Button Configurations-------------------------------------------------------//
AlertDialog alertDialog = new AlertDialog.Builder(screen1.this).create();
alertDialog.setCancelable(false);
alertDialog.setTitle(" Rest Periods");
alertDialog.setView(checkboxLayout);
//-------------------------------------------------------FLAG_BLURBEHIND TO BLUR BACKGROUND-------------------------------------------------------//
WindowManager.LayoutParams lp = alertDialog.getWindow().getAttributes();
//alertDialog.getWindow().addFlags(WindowManager.LayoutParams.FLAG_BLUR_BEHIND); // <--Blurring is no longer supported, Draws from hardware. Too many rendering issues and unresponsiveness with certain phones
alertDialog.getWindow().addFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);
lp.dimAmount = .35f;
alertDialog.getWindow().setAttributes(lp);
alertDialog.setButton("Agree", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,
int which) {
if (AgreeCheckBox.isChecked()) {
// If CheckBox is Checked
String text = "<font color=\"#CC0000\"> Checking-Out... </font>";
checkin.setText(Html.fromHtml(text),BufferType.SPANNABLE);
checkinbutton.setEnabled(false);
} else {
// If CheckBox Isnt Checked
String text = "<font color=\"#A2E8\"> You are currently Checked-In </font>";
checkin.setText(Html.fromHtml(text),BufferType.SPANNABLE);
statuspage.java
public class statuspage extends MapActivity {
////////////////////////// Map and MapView Initializers //////////////////////////////////////////////
LocationManager locationManager; MapView mapView; Criteria criteria; Vibrator vib; ///
Location location; Geocoder gc; Address address; ///
MapController mapController; MyLocationOverlay myLocation; ///
////////////////////////////////////////////////////////////////////////////////////////////////////////////
StringBuilder sb;
String username, password, bestProvider, firstName, lastName, lastLatitudeUpdate;
String LOCATION_SERVICE = "location", addressString = "Searching for nearest address";
int checkedin, Minute, Hour;
Timer EnableLocationonResume;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.statuspage);
vib = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
public class GeoCoder extends AsyncTask<Void, Void, Void> {
String lat = "Acquiring", lng ="Acquiring";
// scrollview will be used to view jobs using a listview Latitude and Longitude TextView
TextView YourLocation = (TextView) findViewById(R.id.YourLocation);
TextView etlongitude = (TextView) findViewById(R.id.etlongitude);
TextView etlatitude = (TextView) findViewById(R.id.etlatitude);
@Override
protected Void doInBackground(Void... params) {
if (location != null) {
//double latitude = myLocation.getMyLocation().getLatitudeE6(); double longitude = myLocation.getMyLocation().getLongitudeE6();
double latitude = location.getLatitude(); double longitude = location.getLongitude();
lat = ("" + (latitude)); lng = ("" + (longitude));
Geocoder gc = new Geocoder(getBaseContext(),Locale.getDefault());
try {
List<Address> addresses = gc.getFromLocation(latitude,longitude, 1);
sb = new StringBuilder();
if (addresses.size() > 0) {
address = addresses.get(0);
int noOfMaxAddressLine = address.getMaxAddressLineIndex();
if (noOfMaxAddressLine > 0) {
for (int i = 0; i < address.getMaxAddressLineIndex(); i++) {
sb.append(address.getAddressLine(i)).append("\n");
}
addressString = sb.toString();
}
}
} catch (Exception e) {
addressString = "Sorry, we are trying to find information about your location";
}
}
return null;
}
@Override
protected void onPostExecute(Void result) {
///////// Animates the map to GPS Position ////////////////////
myLocation.runOnFirstFix(new Runnable() { //
@Override //
public void run() { //
mapController.animateTo(myLocation.getMyLocation()); //
//////////////////////////////////////////////////////////////
}
});
runOnUiThread(new Runnable() {
public void run() {
////////////////TODO TextView to display GeoCoder Address TODO///////////////////////////////////////////
YourLocation.setGravity(Gravity.CENTER); //
YourLocation.setText("Your location:" + "\n" + "(Accurate to 500 meters)" + "\n" + (addressString)); //
//
////////TODO Latitude and Longitude TextView Display Coordinates TODO////////////////////////////////
etlatitude.setText(lat); etlongitude.setText(lng); //
Log.d("Address", (addressString)); //
} //////////////////////////////////////////////////////////////////////////////////////////////////
});
super.onPostExecute(result);
return;
}
}
private final LocationListener locationListener = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
new GeoCoder().execute();
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
};
///////////// Class EnableLocation is a Timer Created To Start GPS and GeoCode Updates ///////////////////////////////
public class EnableLocation extends TimerTask { //
//
//*************************** Uses runOnUiThread to Keep UI updating in Background *********************************//
@Override //
public void run() { //
runOnUiThread(new Runnable() { //
@Override //
public void run() { //
myLocation.enableMyLocation(); //
//location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); //
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000L, 500.0f, locationListener); //
new GeoCoder().execute(); //
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
}
});
}
}
// Class DisableLocation is a Timer Created to Stop GPS Updates then Toasts NewLocation
class DisableLocation extends TimerTask {
// Uses runOnUiThread to Keep UI updating in Background
@Override
public void run() {
runOnUiThread(new Runnable() {
@Override
public void run() {
myLocation.disableMyLocation();
locationManager.removeUpdates(locationListener);
// get your custom_toast.xml ayout
LayoutInflater inflater = getLayoutInflater();
View layout = inflater.inflate(R.anim.custom_toast,(ViewGroup) findViewById(R.id.custom_toast_layout_id));
// set a dummy image
ImageView image = (ImageView) layout.findViewById(R.id.image);
image.setImageResource(R.drawable.toastjet);
// set a message
TextView text = (TextView) layout.findViewById(R.id.text);
text.setGravity(Gravity.CENTER);
text.setText("Location has changed to" + "\n" + (addressString));
// Toast...
Toast location = new Toast(getApplicationContext());
location.setDuration(Toast.LENGTH_LONG);
location.setView(layout);
location.show();
}
});
}
}
@Override
protected void onResume() {
super.onResume();
myLocation.enableMyLocation();
// Fires GPS Updates
EnableLocationonResume = new Timer();
EnableLocation myTimerTask1 = new EnableLocation();
EnableLocationonResume.scheduleAtFixedRate(myTimerTask1, 100, 10000);
overridePendingTransition(R.anim.fadein, R.anim.fadeout);
}
@Override
protected void onPause() {
super.onPause();
EnableLocationonResume.cancel();
myLocation.disableMyLocation();
locationManager.removeUpdates(locationListener);
//////////////////// Fires GPS Updates ///////////////////////////////
Timer EnableLocationonPause = new Timer(); //
EnableLocation myTimerTask = new EnableLocation(); //
EnableLocationonPause.scheduleAtFixedRate(myTimerTask, 0, 2280000); //
//////////////////////////////////////////////////////////////////////
//////////////////// Kills GPS Updates ///////////////////////////////////////
Timer DisableLocationonPause = new Timer(); //
DisableLocation disableLocation = new DisableLocation(); //
DisableLocationonPause.scheduleAtFixedRate(disableLocation, 10000, 2370000);//
//////////////////////////////////////////////////////////////////////////////
overridePendingTransition(R.anim.fadein, R.anim.fadeout);
}
@Override
public void onBackPressed() {
EnableLocationonResume.cancel();
myLocation.disableMyLocation();
locationManager.removeUpdates(locationListener);
// 2280000 Milliseconds = 38 Minutes
// 2370000 Milliseconds = 39.5 Minutes
// 2400000 Milliseconds = 40 Minutes
// 2490000 Milliseconds = 41.5 Minutes
// 2520000 Milliseconds = 42 Minutes
// 2700000 Milliseconds = 45 Minutes
// 2790000 Milliseconds = 46.5 Minutes
// 2820000 Milliseconds = 47 Minutes
// 2850000 Milliseconds = 47.5 Minutes
///////////////// Fires GPS Updates //////////////////////////
Timer EnableLocation = new Timer(); //
EnableLocation EnableLocationTask = new EnableLocation(); //
EnableLocation.scheduleAtFixedRate(EnableLocationTask, 0, 2280000);// <--- 2280000 = 38 Minutes
//////////////////////////////////////////////////////////////
///////////////////// Kills GPS Updates ////////////////////////////////
Timer DisableLocation = new Timer(); //
DisableLocation disableLocation = new DisableLocation(); //
//---------------------------------------------Delays for 10,000 Milliseconds (10 Seconds) to Continue to Poll for GPS--------------------------------------------//
DisableLocation.scheduleAtFixedRate(disableLocation, 10000, 2370000); // <--- 2370000 = 39.5 Minutes
////////////////////////////////////////////////////////////////////////
vib.vibrate(40);
// Send username and password strings into screen1 class
Intent i = new Intent(statuspage.this, screen1.class);
i.putExtra("uid", username); i.putExtra("pwd", password); i.putExtra("firstName", firstName); i.putExtra("lastName", lastName);
i.putExtra("checkedin", checkedin); i.putExtra("lastLatitudeUpdate", lastLatitudeUpdate); i.putExtra("Minute", Minute); i.putExtra("Hour", Hour); startActivity(i);
startActivity(i);
/** Fading Transition Effect */
overridePendingTransition(R.anim.fadein, R.anim.fadeout);
return;
}
}
编辑：基本上我想知道是否有任何方法可以从screen1.java执行GeoCoder类
答案 0 :(得分：0)
您可以按以下方式访问它：
Activity1.GeoCoder coder = new Activity1.GeoCoder();
或使用任何合适的costructor
答案 1 :(得分：0)
由于您的GeoCoder不是static，因此您需要首先实例化一个Activity2对象才能访问它。
内部Activity1：
Activity2 myActivity2 = new Activity2();
GeoCoder myGeoCoder = myActivity2.new GeoCoder();
但是，如果您将GeoCoder设为static，则可以通过以下方式访问它：
GeoCoder myGeoCoder = new Activity2.GeoCoder();
编辑：我建议不要从另一个AsyncTask来调用Activity。 AsyncTask旨在与他们所附加的Activity紧密相关。相反，在AsyncTask中声明Activity1的另一个子类。