所以在这里我想在按下时点击事件，我将有特定的位置类别，而不是用于搜索地点的搜索框。按下 OnClickGPS 后，它将打开 Facebook 的 PlacePickerFragment，顶部有搜索框。但我想在按钮单击时搜索地点类别，如餐厅、剧院等。在这方面的任何帮助都将是非常可观的。
package com.priyank.checkin;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import android.app.AlertDialog;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.pm.Signature;
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.util.Base64;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import com.facebook.model.GraphLocation;
import com.facebook.model.GraphPlace;
import com.facebook.widget.PlacePickerFragment;
import com.facebook.Session;
public class PlacePickerSampleActivity extends FragmentActivity implements LocationListener {
private static final int PLACE_ACTIVITY = 1;
private static final Location SEATTLE_LOCATION = new Location("") {
{
setLatitude(47.6097);
setLongitude(-122.3331);
}
};
private static final Location SAN_FRANCISCO_LOCATION = new Location("") {
{
setLatitude(37.7750);
setLongitude(-122.4183);
}
};
private static final Location PARIS_LOCATION = new Location("") {
{
setLatitude(48.857875);
setLongitude(2.294635);
}
};
private TextView resultsTextView;
private LocationManager locationManager;
private Location lastKnownLocation;
private String NameEditTextValue;
private EditText NameEditText;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main7);
try {
PackageInfo info = getPackageManager().getPackageInfo(
"com.facebook.samples.hellofacebook",
PackageManager.GET_SIGNATURES);
for (Signature signature : info.signatures) {
MessageDigest md = MessageDigest.getInstance("SHA");
md.update(signature.toByteArray());
Log.d("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT));
}
} catch (NameNotFoundException e) {
} catch (NoSuchAlgorithmException e) {
}
Button b=(Button) findViewById(R.id.button1);
b.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
NameEditTextValue = NameEditText.getText().toString();
Intent i = new Intent(Intent.ACTION_SEND);
i.setType("text/plain");
i.putExtra(Intent.EXTRA_SUBJECT, "Alert Message");
i.putExtra(Intent.EXTRA_TEXT, NameEditTextValue +"- via Security Android App");
startActivity(Intent.createChooser(i, "Alert Status"));
}
});
NameEditText = (EditText) findViewById(R.id.editText1);
resultsTextView = (TextView) findViewById(R.id.resultsTextView);
Button button = (Button) findViewById(R.id.seattleButton);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
onClickSeattle();
}
});
button = (Button) findViewById(R.id.sanFranciscoButton);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
onClickSanFrancisco();
}
});
button = (Button) findViewById(R.id.gpsButton);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
onClickGPS();
}
});
if (Session.getActiveSession() == null ||
Session.getActiveSession().isClosed()) {
Session.openActiveSession(this, true, null);
}
locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
}
@Override
protected void onStart() {
super.onStart();
// Update the display every time we are started (this will be "no place selected" on first
// run, or possibly details of a place if the activity is being re-created).
displaySelectedPlace(RESULT_OK);
}
private void onError(Exception exception) {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Error").setMessage(exception.getMessage()).setPositiveButton("OK", null);
builder.show();
}
public void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
case PLACE_ACTIVITY:
displaySelectedPlace(resultCode);
break;
default:
Session.getActiveSession().onActivityResult(this, requestCode, resultCode, data);
break;
}
}
private void displaySelectedPlace(int resultCode) {
String results = "";
PlacePickerApplication application = (PlacePickerApplication) getApplication();
GraphPlace selection = application.getSelectedPlace();
if (selection != null) {
GraphLocation location = selection.getLocation();
results = String.format("Name: %s\nCategory: %s\nLocation: (%f,%f)\nStreet: %s, %s, %s, %s, %s",
selection.getName(), selection.getCategory(),
location.getLatitude(), location.getLongitude(),
location.getStreet(), location.getCity(), location.getState(), location.getZip(),
location.getCountry());
} else {
results = "<No place selected>";
}
resultsTextView.setText(results);
NameEditText.setText(results);
}
public void onLocationChanged(Location location) {
lastKnownLocation = location;
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
private void startPickPlaceActivity(Location location) {
PlacePickerApplication application = (PlacePickerApplication) getApplication();
application.setSelectedPlace(null);
Intent intent = new Intent(this, PickPlaceActivity.class);
PickPlaceActivity.populateParameters(intent, location, null);
startActivityForResult(intent, PLACE_ACTIVITY);
}
private void onClickSeattle() {
try {
startPickPlaceActivity(SEATTLE_LOCATION);
} catch (Exception ex) {
onError(ex);
}
}
private void onClickSanFrancisco() {
try {
startPickPlaceActivity(SAN_FRANCISCO_LOCATION);
} catch (Exception ex) {
onError(ex);
}
}
private void onClickGPS() {
try {
if (lastKnownLocation == null) {
Criteria criteria = new Criteria();
String bestProvider = locationManager.getBestProvider(criteria, false);
if (bestProvider != null) {
lastKnownLocation = locationManager.getLastKnownLocation(bestProvider);
}
}
if (lastKnownLocation == null) {
String model = android.os.Build.MODEL;
if (model.equals("sdk") || model.equals("google_sdk") || model.contains("x86")) {
// Looks like they are on an emulator, pretend we're in Paris if we don't have a
// location set.
lastKnownLocation = PARIS_LOCATION;
} else {
new AlertDialog.Builder(this)
.setTitle(R.string.error_dialog_title)
.setMessage(R.string.no_location)
.setPositiveButton(R.string.ok_button, null)
.show();
return;
}
}
startPickPlaceActivity(lastKnownLocation);
} catch (Exception ex) {
onError(ex);
}
}
}