ShowHideMountPointsActivity.java

package com.google.android.diskusage;

import java.util.Map;
import java.util.Set;

import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.preference.CheckBoxPreference;
import android.preference.PreferenceActivity;
import android.preference.PreferenceScreen;

import com.google.android.diskusage.DiskUsage.FileSystemStats;
import com.google.android.diskusage.entity.FileSystemEntry;

public class ShowHideMountPointsActivity extends PreferenceActivity {
  static final String FILTER_RESULT = "res";
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    addPreferencesFromResource(R.xml.mount_points_ignore_list);
    getPreferenceScreen().setOrderingAsAdded(true);
  }
  
  @Override
  protected void onResume() {
    super.onResume();
    Map<String, MountPoint> mountPoints = MountPoint.getRootedMountPoints(this);
    PreferenceScreen prefs = getPreferenceScreen();
    prefs.removeAll();
    SharedPreferences shprefs =  getSharedPreferences("ignore_list", Context.MODE_PRIVATE);
    Map<String, ?> ignoreList = shprefs.getAll();
    Set<String> ignores = ignoreList.keySet();

    for (MountPoint mountPoint: mountPoints.values()) {
      CheckBoxPreference pref = new CheckBoxPreference(this);
      FileSystemEntry.setupStrings(this);
      FileSystemStats stats = new FileSystemStats(mountPoint);
      pref.setSummary(stats.formatUsageInfo());
      pref.setTitle(mountPoint.root);
      pref.setChecked(!ignores.contains(mountPoint.root));
      prefs.addPreference(pref);
    }
  }
  
  @Override
  protected void onPause() {
    super.onPause();
    PreferenceScreen prefs = getPreferenceScreen();
    SharedPreferences shprefs =  getSharedPreferences("ignore_list", Context.MODE_PRIVATE);
    Editor editor = shprefs.edit();
    editor.clear();

    for (int i = 0; i < prefs.getPreferenceCount(); i++) {
      CheckBoxPreference pref = (CheckBoxPreference) prefs.getPreference(i);
      String root = pref.getTitle().toString();
      if (!pref.isChecked()) {
        editor.putBoolean(root, true);
      }
    }
    editor.commit();
  }
}