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package de.danoeh.antennapod.dialog;
import android.content.Context;
import android.support.v7.app.AlertDialog;
import android.text.TextUtils;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
import de.danoeh.antennapod.R;
import de.danoeh.antennapod.core.feed.FeedItemFilter;
public abstract class FilterDialog {
protected FeedItemFilter filter;
protected Context context;
public FilterDialog(Context context, FeedItemFilter feedItemFilter) {
this.context = context;
this.filter = feedItemFilter;
}
public void openDialog() {
final String[] items = context.getResources().getStringArray(R.array.episode_filter_options);
final String[] values = context.getResources().getStringArray(R.array.episode_filter_values);
final boolean[] checkedItems = new boolean[items.length];
final Set<String> filterValues = new HashSet<>(Arrays.asList(filter.getValues()));
// make sure we have no empty strings in the filter list
for (String filterValue : filterValues) {
if (TextUtils.isEmpty(filterValue)) {
filterValues.remove(filterValue);
}
}
for (int i = 0; i < values.length; i++) {
String value = values[i];
if (filterValues.contains(value)) {
checkedItems[i] = true;
}
}
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setTitle(R.string.filter);
builder.setMultiChoiceItems(items, checkedItems, (dialog, which, isChecked) -> {
if (isChecked) {
filterValues.add(values[which]);
} else {
filterValues.remove(values[which]);
}
});
builder.setPositiveButton(R.string.confirm_label, (dialog, which) -> {
updateFilter(filterValues);
});
builder.setNegativeButton(R.string.cancel_label, null);
builder.create().show();
}
protected abstract void updateFilter(Set<String> filterValues);
}
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