所以，你可能已经看过我以前发布的关于在清道夫寻找应用程序中添加邻近警报并让它们启动的问题。警报正在启动，似乎很好。但是......我使用int ID变量来帮助确定触发特定接近警报时显示的文本。这在一定程度上起作用，但无论出于何种原因，应用程序默认为在addProximityAlert方法中输入的最后一个ID，并且仅填充该最后一个ID的文本，无论接近警报是什么时候触发。
这里是完整的代码：
public class FCRun extends Activity implements LocationListener {
private static final long MINIMUM_DISTANCECHANGE_FOR_UPDATE = 1; // in meters
private static final long MINIMUM_TIME_BETWEEN_UPDATE = 5000; // in Milliseconds
private static final long PROX_ALERT_EXPIRATION = -1; // -1 is never expires
public static final String PROX_ALERT_INTENT = "com.kinghendo.android.frankcem.ProximityAlert";
//public static final int KEY_LOCATION_CHANGED = 0;
private LocationManager lm;
double latitude, longitude;
public String[] Screen;
private ProximityIntentReceiver proximityReceiver;
//private String[] locationList;
// setting default screen text
public TextView txtName;
public TextView txtInfo;
public TextView txtClue;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fcrun);
@SuppressWarnings("unused")
Resources res = getResources();
txtName = (TextView) findViewById(R.id.txtName);
Screen = getResources().getStringArray(R.array.first);
txtName.setText(Screen[0]);
Log.i("txtName", "populated "+PROX_ALERT_INTENT);
txtInfo = (TextView) findViewById(R.id.txtInfo);
Screen = getResources().getStringArray(R.array.first);
txtInfo.setText(Screen[1]);
Log.i("txtInfo", "populated "+PROX_ALERT_INTENT);
txtClue = (TextView)findViewById(R.id.txtClue);
Screen = getResources().getStringArray(R.array.first);
txtClue.setText(Screen[2]);
Log.i("txtClue", "populated "+PROX_ALERT_INTENT);
// Get the location Manager (code from http://examples.javacodegeeks.com/android/core/location/android-location-based-services-example/)
lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
lm.requestLocationUpdates(
LocationManager.GPS_PROVIDER,
MINIMUM_TIME_BETWEEN_UPDATE,
MINIMUM_DISTANCECHANGE_FOR_UPDATE,
this
);
IntentFilter filter = new IntentFilter(PROX_ALERT_INTENT);
proximityReceiver = new ProximityIntentReceiver(this); // registers ProximityIntentReceiver
registerReceiver(proximityReceiver, filter);
addProximityAlerts();
}
private void addProximityAlerts(){
Location loc = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
if (loc == null)
Toast.makeText(this, "No location", Toast.LENGTH_SHORT).show();
else
addProximityAlert(loc.getLatitude(), loc.getLongitude(), 1, 0);
addProximityAlert (38.042015, -84.492637, 10, 27); // test Awesome
addProximityAlert (38.085705, -84.561101, 10, 26); // Test Home Location
addProximityAlert (38.152649, -84.895205, 10, 25); // Test Office Location
addProximityAlert (38.197871, -84.866924, 3, 1); // Information Center
addProximityAlert (38.196001, -84.867435, 6, 2); // Goebel
addProximityAlert (38.203191, -84.867674, 7, 3); // Chapel
addProximityAlert (38.192173, -84.870451, 6, 4); // Confederate Cemetery
addProximityAlert (38.193455, -84.868534, 2, 5); // O'Bannon
addProximityAlert (38.193815, -84.864904, 2, 6); // Henry Clay Jr
addProximityAlert (38.087388, -84.547503, 2, 7); // O'Hara
addProximityAlert (38.191642, -84.870967, 5, 8); // Daniel Boone
}
private void addProximityAlert(double latitude, double longitude, int radius, int ID) {
Log.i("TEST", "addProximityAlert "+latitude+", "+longitude+", "+radius+", " +ID+", " + PROX_ALERT_EXPIRATION);
Intent intent = new Intent(PROX_ALERT_INTENT);
intent.putExtra("ID", ID);
PendingIntent proximityIntent = PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
//lm.addProximityAlert(latitude, longitude, radius, ID, proximityIntent);
lm.addProximityAlert(latitude, longitude, radius, PROX_ALERT_EXPIRATION, proximityIntent);
}
public void onProximityAlert(int ID, boolean entering) {
Log.i("TEST", "LOC " +latitude+", "+longitude);
Log.i("TEST", "onProximityAlert ID="+ID+" entering: "+entering);
switch (ID){
case 1:
txtName = (TextView) findViewById(R.id.txtName);
Screen = getResources().getStringArray(R.array.start);
txtName.setText(Screen[0]);
Log.i("txtName", "populated"+ID);
txtInfo = (TextView) findViewById(R.id.txtInfo);
Screen = getResources().getStringArray(R.array.start);
txtInfo.setText(Screen[1]);
Log.i("txtInfo", "populated "+ID);
txtClue = (TextView)findViewById(R.id.txtClue);
Screen = getResources().getStringArray(R.array.start);
txtClue.setText(Screen[2]);
Log.i("txtClue", "populated "+ID);
break;
case 2:
txtName = (TextView) findViewById(R.id.txtName);
Screen = getResources().getStringArray(R.array.goebel);
txtName.setText(Screen[0]);
Log.i("txtName", "populated "+ID);
txtInfo = (TextView) findViewById(R.id.txtInfo);
Screen = getResources().getStringArray(R.array.goebel);
txtInfo.setText(Screen[1]);
Log.i("txtInfo", "populated "+ID);
txtClue = (TextView)findViewById(R.id.txtClue);
Screen = getResources().getStringArray(R.array.goebel);
txtClue.setText(Screen[2]);
Log.i("txtClue", "populated "+ID);
break;
case 3:
txtName = (TextView) findViewById(R.id.txtName);
Screen = getResources().getStringArray(R.array.church);
txtName.setText(Screen[0]);
Log.i("txtName", "populated "+ID);
txtInfo = (TextView) findViewById(R.id.txtInfo);
Screen = getResources().getStringArray(R.array.church);
txtInfo.setText(Screen[1]);
Log.i("txtInfo", "populated "+ID);
txtClue = (TextView)findViewById(R.id.txtClue);
Screen = getResources().getStringArray(R.array.church);
txtClue.setText(Screen[2]);
Log.i("txtClue", "populated "+ID);
break;
case 4:
txtName = (TextView) findViewById(R.id.txtName);
Screen = getResources().getStringArray(R.array.confederate);
txtName.setText(Screen[0]);
Log.i("txtName", "populated "+ID);
txtInfo = (TextView) findViewById(R.id.txtInfo);
Screen = getResources().getStringArray(R.array.confederate);
txtInfo.setText(Screen[1]);
Log.i("txtInfo", "populated "+ID);
txtClue = (TextView)findViewById(R.id.txtClue);
Screen = getResources().getStringArray(R.array.confederate);
txtClue.setText(Screen[2]);
Log.i("txtClue", "populated "+ID);
break;
case 5:
txtName = (TextView) findViewById(R.id.txtName);
Screen = getResources().getStringArray(R.array.obannon);
txtName.setText(Screen[0]);
Log.i("txtName", "populated "+ID);
txtInfo = (TextView) findViewById(R.id.txtInfo);
Screen = getResources().getStringArray(R.array.obannon);
txtInfo.setText(Screen[1]);
Log.i("txtInfo", "populated "+ID);
txtClue = (TextView)findViewById(R.id.txtClue);
Screen = getResources().getStringArray(R.array.obannon);
txtClue.setText(Screen[2]);
Log.i("txtClue", "populated "+ID);
break;
case 6:
txtName = (TextView) findViewById(R.id.txtName);
Screen = getResources().getStringArray(R.array.hcj);
txtName.setText(Screen[0]);
Log.i("txtName", "populated "+ID);
txtInfo = (TextView) findViewById(R.id.txtInfo);
Screen = getResources().getStringArray(R.array.hcj);
txtInfo.setText(Screen[1]);
Log.i("txtInfo", "populated "+ID);
txtClue = (TextView)findViewById(R.id.txtClue);
Screen = getResources().getStringArray(R.array.hcj);
txtClue.setText(Screen[2]);
Log.i("txtClue", "populated "+ID);
break;
case 7:
txtName = (TextView) findViewById(R.id.txtName);
Screen = getResources().getStringArray(R.array.ohara);
txtName.setText(Screen[0]);
Log.i("txtName", "populated "+ID);
txtInfo = (TextView) findViewById(R.id.txtInfo);
Screen = getResources().getStringArray(R.array.ohara);
txtInfo.setText(Screen[1]);
Log.i("txtInfo", "populated "+ID);
txtClue = (TextView)findViewById(R.id.txtClue);
Screen = getResources().getStringArray(R.array.ohara);
txtClue.setText(Screen[2]);
Log.i("txtClue", "populated "+ID);
break;
case 8:
txtName = (TextView) findViewById(R.id.txtName);
Screen = getResources().getStringArray(R.array.danielboone);
txtName.setText(Screen[0]);
Log.i("txtName", "populated "+ID);
txtInfo = (TextView) findViewById(R.id.txtInfo);
Screen = getResources().getStringArray(R.array.danielboone);
txtInfo.setText(Screen[1]);
Log.i("txtInfo", "populated "+ID);
txtClue = (TextView)findViewById(R.id.txtClue);
Screen = getResources().getStringArray(R.array.danielboone);
txtClue.setText(Screen[2]);
Log.i("txtClue", "populated "+ID);
break;
case 25:
txtName = (TextView) findViewById(R.id.txtName);
Screen = getResources().getStringArray(R.array.toffice);
txtName.setText(Screen[0]);
Log.i("txtName", "populated "+ID);
txtInfo = (TextView) findViewById(R.id.txtInfo);
Screen = getResources().getStringArray(R.array.toffice);
txtInfo.setText(Screen[1]);
Log.i("txtInfo", "populated "+ID);
txtClue = (TextView)findViewById(R.id.txtClue);
Screen = getResources().getStringArray(R.array.toffice);
txtClue.setText(Screen[2]);
Log.i("txtClue", "populated "+ID);
break;
case 26:
txtName = (TextView) findViewById(R.id.txtName);
Screen = getResources().getStringArray(R.array.thome);
txtName.setText(Screen[0]);
Log.i("txtName", "populated "+ID);
txtInfo = (TextView) findViewById(R.id.txtInfo);
Screen = getResources().getStringArray(R.array.thome);
txtInfo.setText(Screen[1]);
Log.i("txtInfo", "populated "+ID);
txtClue = (TextView)findViewById(R.id.txtClue);
Screen = getResources().getStringArray(R.array.thome);
txtClue.setText(Screen[2]);
Log.i("txtClue", "populated "+ID);
break;
case 27:
txtName = (TextView) findViewById(R.id.txtName);
Screen = getResources().getStringArray(R.array.tawesome);
txtName.setText(Screen[0]);
Log.i("txtName", "populated "+ID);
txtInfo = (TextView) findViewById(R.id.txtInfo);
Screen = getResources().getStringArray(R.array.tawesome);
txtInfo.setText(Screen[1]);
Log.i("txtInfo", "populated "+ID);
txtClue = (TextView)findViewById(R.id.txtClue);
Screen = getResources().getStringArray(R.array.tawesome);
txtClue.setText(Screen[2]);
Log.i("txtClue", "populated "+ID);
break;
default:
txtName = (TextView) findViewById(R.id.txtName);
Screen = getResources().getStringArray(R.array.first);
txtName.setText(Screen[0]);
Log.i("txtName", "populated "+ID);
txtInfo = (TextView) findViewById(R.id.txtInfo);
Screen = getResources().getStringArray(R.array.first);
txtInfo.setText(Screen[1]);
Log.i("txtInfo", "populated "+ID);
txtClue = (TextView)findViewById(R.id.txtClue);
Screen = getResources().getStringArray(R.array.first);
txtClue.setText(Screen[2]);
Log.i("txtClue", "populated "+ID);
break;
}
}
@Override
public void onLocationChanged(Location location) {
//String provider = location.getProvider();
latitude = location.getLatitude();
longitude = location.getLongitude();
Log.i("TEST", "lat: "+latitude+" lng: "+longitude+" "+PROX_ALERT_INTENT);
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
protected void onResume() {
super.onResume();
}
@Override
protected void onPause() {
super.onPause();
}
@Override
protected void onDestroy() {
super.onDestroy();
Log.i("TEST", "Close Out");
lm.removeUpdates(this);
unregisterReceiver(proximityReceiver);
}
}
这是接收者代码......
public class ProximityIntentReceiver extends BroadcastReceiver {
private static final int NOTIFICATION_ID = 1000;
private WeakReference<FCRun> mActivity;
long lat, lon;
public ProximityIntentReceiver(FCRun activity) {
mActivity = new WeakReference<FCRun>(activity);
}
@Override
public void onReceive(Context context, Intent intent) {
String key = LocationManager.KEY_PROXIMITY_ENTERING;
Bundle results = getResultExtras(true);
Boolean entering = intent.getBooleanExtra(key, false);
lat = intent.getLongExtra("location-lat ", lat);
lon = intent.getLongExtra("location-lon ", lon);
int ID = intent.getIntExtra("ID", 0);
Log.i("ProximityIntentReceiver", "coordinate-lat " + lat );
Log.i("ProximityIntentReceiver", "coordinate-lon " + lon );
Log.i("ProximityIntentReceiver", String.format("ID: %d entering: %s", ID, entering?"true":"false"));
FCRun a = mActivity.get();
if (a != null)
a.onProximityAlert(ID, entering);
// Vibrate for 2 seconds
Vibrator vibrator = (Vibrator) context.getSystemService(Context.VIBRATOR_SERVICE);
vibrator.vibrate(2000);
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, new Intent(FCRun.PROX_ALERT_INTENT), PendingIntent.FLAG_UPDATE_CURRENT);
Notification noti = new Notification.Builder(context)
.setContentTitle("Location Alert ")
.setContentText("Entering Point of Interest")
.setSmallIcon(R.drawable.ic_launcher)
.setContentIntent(pendingIntent)
.setAutoCancel(true)
.build(); // available from API level 11 and onwards
notificationManager.notify(NOTIFICATION_ID, noti);
}
}
这里的任何帮助将不胜感激。 谢谢， Hendo
答案 0 :(得分：0)
此处的问题是，您尝试在PendingIntent中设置多个addProximityAlert个实例，并且您的PendingIntent被认为是相同的，因为它们仅在附加内容上有所不同。 documentation for PendingIntent解释了这一点：
PendingIntent本身只是对系统维护的令牌的引用，该令牌描述了用于检索它的原始数据。这意味着，即使其拥有的应用程序的进程被终止，PendingIntent本身也将保持可用于已经给出它的其他进程。如果创建应用程序稍后重新检索相同类型的PendingIntent（相同的操作，相同的Intent操作，数据，类别和组件以及相同的标志），它将接收表示同一令牌的PendingIntent，如果它仍然有效，并且可以因此调用cancel（）将其删除。
由于这种行为，为了检索PendingIntent，重要的是要知道两个Intent何时被认为是相同的。人们常犯的一个错误就是使用Intent创建多个PendingIntent对象，这些Intent只在其＆＃34; extra＆＃34;内容，期望每次获得不同的PendingIntent。这不会发生。用于匹配的Intent部分与Intent.filterEquals定义的部分相同。如果你使用两个与Intent.filterEquals相同的Intent对象，那么你将获得两个相同的PendingIntent。
它还提供了如何修复它的指导：
有两种典型的方法可以解决这个问题。
如果您确实需要多个不同的PendingIntent对象，请执行此操作 同时（例如使用两个显示的通知 在同一时间），那么你需要确保有一些东西 将他们与不同的人联系起来是不同的 PendingIntents。这可以是所考虑的任何Intent属性 Intent.filterEquals，或提供给的不同请求代码整数 getActivity（Context，int，Intent，int），getActivities（Context，int， Intent []，int），getBroadcast（Context，int，Intent，int）或 getService（Context，int，Intent，int）。
因此，最简单的解决方法是使用ID作为请求代码（假设它是唯一的）。 E.g：
更改
PendingIntent proximityIntent = PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
到
PendingIntent proximityIntent = PendingIntent.getBroadcast(this, ID, intent, PendingIntent.FLAG_UPDATE_CURRENT);