Question

我正在处理处理近距离警报的应用程序。我可以添加接近警报，但我无法删除这些接近警报。我已经在手机和虚拟设备上尝试了我的代码，但我无法将其删除。

这是我的代码：

添加了保存到数据库和邻近警报的位置的活动

    saveButton.setOnClickListener(new View.OnClickListener() {
                    public void onClick(View view) {
                        String title = titleText.getText().toString();
                        if(title.matches("")){
                            Toast.makeText(CurrentLocationActivity.this,"Please provide a Title",Toast.LENGTH_SHORT).show();
                        }
                        else{
                            saveLocation(saveProximityAlertPoint(title));                                              
                            setResult(RESULT_OK);                                     
                            Toast.makeText(CurrentLocationActivity.this,"Location Saved",Toast.LENGTH_SHORT).show();    
                        }
                    }
                });

    private void saveLocation(int unique_location_id) {
                if (location == null) {
                    Toast.makeText(this, "No last known location",Toast.LENGTH_LONG).show();
                    return ;
                }
                else{
                    String title = titleText.getText().toString();                     
                    String type = typeSpinner.getSelectedItem().toString();                                         
                    range = (int) (radius + POINT_RADIUS);      
                    int unique_id = unique_location_id;     
                    Double latitude = location.getLatitude();
                    Double longitude = location.getLongitude();

                    location_id = mDbHelper.createLocation(title, type, range, unique_id, latitude, longitude);

                    titleText.setText("");
                    radiusBar.setProgress(0);
                }
            }

    private int saveProximityAlertPoint(String title) {
                if (location == null) {
                    Toast.makeText(this, "No last known location.",Toast.LENGTH_LONG).show();
                    return 0;
                }
                else{
                    Double latitudeProxAlert = location.getLatitude();
                    Double longitudeProxAlert = location.getLongitude();
                    int unique_location_id = addProximityAlert(latitudeProxAlert, longitudeProxAlert, title);

                    return unique_location_id;
                } 
            }

    private int addProximityAlert(double latitude, double longitude, String title) {

                Intent intent = new Intent(PROX_ALERT_INTENT);
                intent.putExtra(LOCAION_TITLE, title);

                PendingIntent proximityIntent = PendingIntent.getBroadcast(this, ++pending_intent_unique_id , intent, 0);

                locationManager.addProximityAlert(latitude, longitude, range, PROX_ALERT_EXPIRATION, proximityIntent );

                IntentFilter filter = new IntentFilter(PROX_ALERT_INTENT);  
                registerReceiver(new ProximityIntentReceiver(), filter);
                Toast.makeText(this, "Proximity has been added for " + title + " with unique_id " + pending_intent_unique_id,
                        Toast.LENGTH_LONG).show();

                SharedPreferences.Editor editor = preferences.edit();
                editor.putInt("UNIQUEID", pending_intent_unique_id);
                editor.commit();
                return pending_intent_unique_id;
            }

以及我尝试删除邻近警报的其他活动

    public boolean onContextItemSelected(MenuItem item) {                  
            switch(item.getItemId()) {
            case R.id.menu_delete:
                AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo(); 

                Cursor proxRemoveCursor = mDbHelper.fetchLocation(info.id);
                removeProximityAlert(proxRemoveCursor.getInt(proxRemoveCursor.getColumnIndexOrThrow(DBAdapter.KEY_UNIQUE_LOCATION_ID)));

                mDbHelper.deleteLocation(info.id);

                proxRemoveCursor.close();

                return true;
}

    private void removeProximityAlert(int unique_id) {

            String context = Context.LOCATION_SERVICE;
            LocationManager locationManager = (LocationManager) getSystemService(context);

            Intent anIntent = new Intent(REMOVE_PROXIMITY);
            PendingIntent operation = 
                PendingIntent.getBroadcast(getApplicationContext(), unique_id , anIntent, 0);
            locationManager.removeProximityAlert(operation);
        }
        }

这是一个有点长的代码，但这是让我的问题正确的最短路径。 Thnx的帮助。

Answer 1

解决了！问题是我发送给addProximityAlert()和removeProximityAlert()上的意图对象的操作不匹配。现在我可以在纠正错误后删除接近警报。

Answer 2

REMOVE_PROXIMITY的值是什么？

Android删除邻近警报

2 个答案: