Android Open Source - MovisensGattSensorExample Preferences

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License

The source code is released under:

GNU General Public License

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Java Source Code

package com.movisens.gattsensorexample.activities;
/* w  ww  .  j  ava2 s.  c o  m*/
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
import android.os.Bundle;
import android.preference.EditTextPreference;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.PreferenceCategory;
import android.preference.PreferenceFragment;
import android.preference.PreferenceScreen;
import android.view.MenuItem;

import com.movisens.gattsensorexample.R;
import com.movisens.gattsensorexample.application.App;

public class Preferences extends Activity {

  public static final String SAMPLING_RUNNING = "sampling_running";
  public static final String SENSOR_ADDRESS = "sensor_address";
  public static final String SENSOR_NAME = "sensor_name";

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    getActionBar().setDisplayHomeAsUpEnabled(true);

    // Display the fragment as the main content.
    getFragmentManager().beginTransaction()
        .replace(android.R.id.content, new PrefsFragment()).commit();
  }

  @Override
  public boolean onMenuItemSelected(int featureId, MenuItem item) {
    switch (item.getItemId()) {
    case android.R.id.home:
      startActivity(new Intent(this, StartActivity.class));
      finish();
      return true;
    default:
      return super.onOptionsItemSelected(item);
    }
  }

  public static class PrefsFragment extends PreferenceFragment implements
      OnSharedPreferenceChangeListener {

    @Override
    public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);

      // Load the preferences from an XML resource
      addPreferencesFromResource(R.xml.preferences);

      for (int i = 0; i < getPreferenceScreen().getPreferenceCount(); i++) {
        initSummary(getPreferenceScreen().getPreference(i));
      }
    }

    @Override
    public void onResume() {
      super.onResume();
      // Set up a listener whenever a key changes
      getPreferenceScreen().getSharedPreferences()
          .registerOnSharedPreferenceChangeListener(this);
      updatePrefSummary(findPreference("select_sensor"));
    }

    @Override
    public void onPause() {
      super.onPause();
      // Unregister the listener whenever a key changes
      getPreferenceScreen().getSharedPreferences()
          .unregisterOnSharedPreferenceChangeListener(this);
    }

    public void onSharedPreferenceChanged(
        SharedPreferences sharedPreferences, String key) {
      updatePrefSummary(findPreference(key));
    }

    private void initSummary(Preference p) {
      if (p instanceof PreferenceCategory) {
        PreferenceCategory pCat = (PreferenceCategory) p;
        for (int i = 0; i < pCat.getPreferenceCount(); i++) {
          initSummary(pCat.getPreference(i));
        }
      } else {
        updatePrefSummary(p);
      }
    }

    private void updatePrefSummary(Preference p) {
      if (p instanceof ListPreference) {
        ListPreference listPref = (ListPreference) p;
        p.setSummary(listPref.getEntry());
      } else if (p instanceof EditTextPreference) {
        EditTextPreference editTextPref = (EditTextPreference) p;
        p.setSummary(editTextPref.getText());
      } else if (p instanceof PreferenceScreen) {
        p.setSummary(App.app().getSensor());
      }
    }
  }
}

Java Source Code List