2013.12.03（6） ——— android ActionbarSherlockSample之ListNavigation

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#移动开发

本文介绍了一个使用Action Bar Sherlock实现的Android应用样例，重点在于ListNavigation功能的实现，包括主题切换、列表视图导航模式设置及与主机活动的交互。

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2013.12.03（6） ——— android ActionbarSherlockSample之ListNavigation

package com.actionbarsherlock.sample.demos;

import android.content.Context;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.TextView;
import com.actionbarsherlock.app.ActionBar;
import com.actionbarsherlock.app.SherlockActivity;

public class ListNavigation extends SherlockActivity implements ActionBar.OnNavigationListener {
    private TextView mSelected;
    private String[] mLocations;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        setTheme(SampleList.THEME); //Used for theme switching in samples
        super.onCreate(savedInstanceState);

        setContentView(R.layout.list_navigation);
        mSelected = (TextView)findViewById(R.id.text);

        mLocations = getResources().getStringArray(R.array.locations);

        Context context = getSupportActionBar().getThemedContext();
        ArrayAdapter<CharSequence> list = ArrayAdapter.createFromResource(context, R.array.locations, R.layout.sherlock_spinner_item);
        list.setDropDownViewResource(R.layout.sherlock_spinner_dropdown_item);

        getSupportActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);
        getSupportActionBar().setListNavigationCallbacks(list, this);
    }

    @Override
    public boolean onNavigationItemSelected(int itemPosition, long itemId) {
        mSelected.setText("Selected: " + mLocations[itemPosition]);
        return true;
    }
}

getSupportActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);

设置导航样式，一共有三种样式：

/**
     * Standard navigation mode. Consists of either a logo or icon
     * and title text with an optional subtitle. Clicking any of these elements
     * will dispatch onOptionsItemSelected to the host Activity with
     * a MenuItem with item ID android.R.id.home.
     */
    public static final int NAVIGATION_MODE_STANDARD = android.app.ActionBar.NAVIGATION_MODE_STANDARD;

    /**
     * List navigation mode. Instead of static title text this mode
     * presents a list menu for navigation within the activity.
     * e.g. this might be presented to the user as a dropdown list.
     */
    public static final int NAVIGATION_MODE_LIST = android.app.ActionBar.NAVIGATION_MODE_LIST;

    /**
     * Tab navigation mode. Instead of static title text this mode
     * presents a series of tabs for navigation within the activity.
     */
    public static final int NAVIGATION_MODE_TABS = android.app.ActionBar.NAVIGATION_MODE_TABS;