Android使用SAX解析XML(3)

主界面MainActivity.java：
package com.hzhi.my_sax;import java.util.ArrayList;import android.os.Bundle;import android.app.Activity;import android.content.Intent;import android.util.Log;import android.view.Menu;import android.view.View;import android.widget.AdapterView;import android.widget.ArrayAdapter;import android.widget.Spinner;import android.widget.AdapterView.OnItemSelectedListener;public class MainActivity extends Activity implements OnItemSelectedListener{public static final String str_school = "School";public static final String str_major = "Major";public static final String str_clas = "Class";// 控件变量public Spinner spn_school;public Spinner spn_major;public Spinner spn_clas;public infor m_infor;// 适配器容器public ArrayList<school> arr_school = new ArrayList<school>();public ArrayList<major> arr_major = new ArrayList<major>();public ArrayList<clas> arr_clas = new ArrayList<clas>();// 选择的项目编号public int pos_school;public int pos_major;public int pos_class;// 选择班级次数public int c_num = 0;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);// 获得控件get_con();// 设置适配器        ArrayAdapter<school> ada_school = new ArrayAdapter<school>(this, android.R.layout.simple_spinner_item, arr_school);        ada_school.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);spn_school.setAdapter(ada_school);        ArrayAdapter<major> ada_major = new ArrayAdapter<major>(this, android.R.layout.simple_spinner_item, arr_major);        ada_major.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);spn_major.setAdapter(ada_major);        ArrayAdapter<clas> ada_clas = new ArrayAdapter<clas>(this, android.R.layout.simple_spinner_item, arr_clas);        ada_clas.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);spn_clas.setAdapter(ada_clas);// 设置监听器spn_school.setOnItemSelectedListener(this);spn_major.setOnItemSelectedListener(this);spn_clas.setOnItemSelectedListener(this);m_infor = new infor();init();}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}// 获得控件public void get_con(){spn_school = (Spinner) findViewById(R.id.spn_school);spn_major = (Spinner) findViewById(R.id.spn_major);spn_clas = (Spinner) findViewById(R.id.spn_class);}// 选择学院public void do_school_select() {//清除数据集arr_major.clear();arr_clas.clear();//设置数据集arr_major.addAll(m_infor.get_schools().get(pos_school).get_majors());arr_clas.addAll(m_infor.get_schools().get(pos_school).get_majors().get(0).get_clases()); //通知数据集改变((ArrayAdapter)this.spn_major.getAdapter()).notifyDataSetChanged();((ArrayAdapter)this.spn_clas.getAdapter()).notifyDataSetChanged();//初始化设置选择项this.spn_major.setSelection(0);this.spn_clas.setSelection(0);c_num = 0;}// 选择专业public void do_major_select() {//清除数据集arr_clas.clear();//设置数据集arr_clas.addAll(m_infor.get_schools().get(pos_school).get_majors().get(pos_major).get_clases()); //通知数据集改变((ArrayAdapter)spn_clas.getAdapter()).notifyDataSetChanged();//初始化设置选择项spn_clas.setSelection(0);c_num = 0;}// 选择班级public void do_class_select(){if (c_num>0){school b_school = m_infor.get_schools().get(pos_school);major b_major = b_school.get_majors().get(pos_major);clas b_clas = b_major.get_clases().get(pos_class);Intent i = new Intent(this, DetailActivity.class);i.putExtra(str_school, b_school);i.putExtra(str_major, b_major);i.putExtra(str_clas, b_clas);this.startActivity(i);}c_num++;}@Overridepublic void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {// TODO Auto-generated method stubswitch(parent.getId()) {case R.id.spn_school: {pos_school = pos;do_school_select();break;}case R.id.spn_major: {pos_major = pos;do_major_select();break;}case R.id.spn_class: {pos_class = pos;do_class_select();break;}}}@Overridepublic void onNothingSelected(AdapterView<?> arg0) {// TODO Auto-generated method stub}// 清除数据集public void clear_all_dataset(){arr_school.clear();arr_major.clear();arr_clas.clear();}// 通知所有数据集已经改变public void notify_all_dataset(){((ArrayAdapter) spn_school.getAdapter()).notifyDataSetChanged();((ArrayAdapter) spn_major.getAdapter()).notifyDataSetChanged();((ArrayAdapter) spn_clas.getAdapter()).notifyDataSetChanged();}// 设置数据集public void add_all_dataset(){arr_school.addAll(m_infor.get_schools());arr_major.addAll(m_infor.get_schools().get(0).get_majors());arr_clas.addAll(m_infor.get_schools().get(0).get_majors().get(0).get_clases());}// 初始化界面public void init(){super.onStart();util.get_ins().parse(getResources().openRawResource(R.raw.infor),m_infor);// 清除数据集clear_all_dataset();// 设置数据集add_all_dataset();// 通知数据集改变notify_all_dataset();}}
最重要的语句是init()函数里面的
util.get_ins().parse(getResources().openRawResource(R.raw.infor),m_infor);
这条语句开始了解析infor.xml文件的过程，并将解析的结果放在变量m_infor里面。
更多相关文章

随机推荐
