Android Open Source - RedditReader_Android_app Settings Activity

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License

The source code is released under:

MIT License

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Java Source Code

package com.example.dawoon.redditreader;
/* ww w .  j a  va  2 s  .com*/
import android.annotation.TargetApi;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;
import android.preference.Preference;
import android.preference.PreferenceActivity;
import android.preference.PreferenceManager;
import android.support.v7.widget.Toolbar;
import android.view.View;

import com.example.dawoon.redditreader.data.RedditContract.PostingEntry;
import com.example.dawoon.redditreader.sync.RedditSyncAdapter;

/**
 * Activity for Settings page. It only contains preference for subreddit setting.
 */
public class SettingsActivity extends PreferenceActivity
        implements Preference.OnPreferenceChangeListener {

    boolean mBindingPreference;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_settings);
        Toolbar toolbar = (Toolbar) findViewById(R.id.my_awesome_toolbar);
        if (toolbar != null) {
            toolbar.setTitle(R.string.title_activity_settings);
            toolbar.setNavigationIcon(R.drawable.abc_ic_ab_back_mtrl_am_alpha);
            toolbar.setNavigationOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    SettingsActivity.this.finish();
                }
            });
        }
        // Add 'general' preferences, defined in the XML file
        addPreferencesFromResource(R.xml.pref_general);

        // For all preferences, attach an OnPreferenceChangeListener so the UI summary can be
        // updated when the preference changes.
        bindPreferenceSummaryToValue(findPreference(getString(R.string.pref_subreddit_key)));
    }

    /**
     * Attaches a listener so the summary is always updated with the preference value.
     * Also fires the listener once, to initialize the summary (so it shows up before the value
     * is changed.)
     */
    private void bindPreferenceSummaryToValue(Preference preference) {
        mBindingPreference = true;
        // Set the listener to watch for value changes.
        preference.setOnPreferenceChangeListener(this);

        // Trigger the listener immediately with the preference's
        // current value.
        onPreferenceChange(preference,
                PreferenceManager
                        .getDefaultSharedPreferences(preference.getContext())
                        .getString(preference.getKey(), ""));
        mBindingPreference = false;
    }

    @Override
    public boolean onPreferenceChange(Preference preference, Object value) {
        if (!mBindingPreference) {
            if (preference.getKey().equals(getString(R.string.pref_subreddit_key))) {
                RedditSyncAdapter.syncImmediately(this);
            } else {
                getContentResolver().notifyChange(PostingEntry.CONTENT_URI, null);
            }
        }
        return true;
    }

    @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
    @Override
    public Intent getParentActivityIntent() {
        return super.getParentActivityIntent().addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    }
}

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