ChatsPreferenceFragment.java 文件源码

@Override
public boolean onPreferenceClick(Preference preference) {
  final int threadLengthLimit = TextSecurePreferences.getThreadTrimLength(getActivity());
  AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
  builder.setTitle(R.string.ApplicationPreferencesActivity_delete_all_old_messages_now);
  builder.setMessage(getResources().getQuantityString(R.plurals.ApplicationPreferencesActivity_this_will_immediately_trim_all_conversations_to_the_d_most_recent_messages,
                                                      threadLengthLimit, threadLengthLimit));
  builder.setPositiveButton(R.string.ApplicationPreferencesActivity_delete,
    new DialogInterface.OnClickListener() {
      @Override
      public void onClick(DialogInterface dialog, int which) {
        Trimmer.trimAllThreads(getActivity(), threadLengthLimit);
      }
    });

  builder.setNegativeButton(android.R.string.cancel, null);
  builder.show();

  return true;
}