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我試圖執行一個左右滑動操作，它會發送一個確認滑動方向的嚮導。我在網上找到了一個簡單的代碼，它只用一個文本視圖就可以很好地工作。但是，當我嘗試將這個想法應用到我一直在研究的項目中時，在刷屏時我沒有得到任何結果。下面的許多代碼可能與問題無關，但我決定展示我的整個代碼以防萬一。謝謝。左/右滑動不起作用
package com.example.final_project;
import java.util.Map;
import android.app.Activity;
import android.app.ActivityOptions;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.GestureDetector;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends Activity {
Button B1,B2;
EditText Text1;
String Text;
String Preference;
String RestarauntChoices= "https://maps.google.com/maps?q=";
private GestureDetector gestureDetector;
Double Latitude, Longitude;
public static String MY_PREFS = "finalproject.my_prefs";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
gestureDetector = new GestureDetector(
new SwipeGestureDetector());
Text1=(EditText)findViewById(R.id.editText1);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (gestureDetector.onTouchEvent(event)) {
return true;
}
return super.onTouchEvent(event);
}
private void onLeftSwipe() {
Toast.makeText(getApplicationContext(), "Left", Toast.LENGTH_LONG).show();
}
private void onRightSwipe() {
Toast.makeText(getApplicationContext(), "Right", Toast.LENGTH_LONG).show();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
/*
//Must Be Ran on a Device. If using Emulator it crashes
//Due to lack of Google Maps Application
if(item.getItemId() == R.id.menu_mapLocation){
String uriBegin = "geo:" + Latitude + "," + Longitude;
String query = Latitude + "," + Longitude;
String encodedQuery = Uri.encode(query);
String uriString = uriBegin + "?q=" + encodedQuery + "&z=16";
Uri uri = Uri.parse(uriString);
Intent intent =new Intent(android.content.Intent.ACTION_VIEW, uri);
startActivity(intent);
}
*/
return super.onOptionsItemSelected(item);
}
@Override
public boolean onPrepareOptionsMenu(Menu menu){
/*
menu.clear();
getMenuInflater().inflate(R.menu.main, menu);
SharedPreferences prefs = getSharedPreferences(MY_PREFS, Activity.MODE_PRIVATE);
for(Map.Entry<String,?> entry : prefs.getAll().entrySet()){
menu.add(entry.getValue().toString());
}
*/
return super.onPrepareOptionsMenu(menu);
}
public void GpsClick(View view){
/*
LocationManager mlocManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
LocationListener mlocListener = new MyLocationListener();
mlocManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 10000, 0, mlocListener);
Toast.makeText(getApplicationContext(), Text, Toast.LENGTH_SHORT).show();
*/
}
public void FindPartyClick(View view){
/*
Preference=Text1.getText().toString();
SharedPreferences prefs = getSharedPreferences(MY_PREFS, Activity.MODE_PRIVATE);
SharedPreferences.Editor editor = prefs.edit();
editor.putString(Preference, Preference);
editor.commit();
Intent intent = new Intent(MainActivity.this, SearchClass.class);
String Address=Text1.getText().toString();
if(Address.length()!=5 && Address.matches("\\d+"))
Toast.makeText(getApplicationContext(),"Zip Code must be 5 digits" , Toast.LENGTH_SHORT).show();
else{
intent.putExtra("message", Address);
Bundle bndlanimation = ActivityOptions.makeCustomAnimation(getApplicationContext(), R.anim.animation,R.anim.animation2).toBundle();
startActivity(intent, bndlanimation);
}
//startActivity(intent);
*/
}
// Private class for gestures
private class SwipeGestureDetector
extends SimpleOnGestureListener {
// Swipe properties, you can change it to make the swipe
// longer or shorter and speed
private static final int SWIPE_MIN_DISTANCE = 120;
private static final int SWIPE_MAX_OFF_PATH = 200;
private static final int SWIPE_THRESHOLD_VELOCITY = 200;
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2,
float velocityX, float velocityY) {
try {
float diffAbs = Math.abs(e1.getY() - e2.getY());
float diff = e1.getX() - e2.getX();
if (diffAbs > SWIPE_MAX_OFF_PATH)
return false;
// Left swipe
if (diff > SWIPE_MIN_DISTANCE
&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
MainActivity.this.onLeftSwipe();
// Right swipe
} else if (-diff > SWIPE_MIN_DISTANCE
&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
MainActivity.this.onRightSwipe();
}
} catch (Exception e) {
Log.e("YourActivity", "Error on gestures");
}
return false;
}
}
/* Class My Location Listener */
/*
public class MyLocationListener implements LocationListener{
@Override
public void onLocationChanged(Location loc){
loc.getLatitude();
loc.getLongitude();
setGPS(loc.getLatitude(),loc.getLongitude());
}
public String setGPS(double Lat, double Long){
Latitude=Lat;
Longitude=Long;
Text = "My current location is: " + "Latitude = " + Lat + "Longitude = " + Long;
return Text;
}
@Override
public void onProviderDisabled(String provider)
{
Toast.makeText(getApplicationContext(),"Gps Disabled" , Toast.LENGTH_SHORT).show();
}
@Override
public void onProviderEnabled(String provider)
{
Toast.makeText(getApplicationContext(), "Gps Enabled", Toast.LENGTH_SHORT).show();
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
}/* End of Class MyLocationListener */
}/* End of Main Activity */
類在不同的文件
package com.example.final_project;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
public class SearchClass extends Activity{
String msg;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.searchpage);
Intent intent2 = getIntent();
msg = intent2.getStringExtra("message");
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public void onResume(){
super.onResume();
}
}