移动开发大作业————随手记（主界面和编辑界面）

功能需求

随手记的功能

1编辑增加笔记

2.自由查看修改保存的笔记

3.自由填写文字和图片

主界面编写

MainActivity.java

package com.cong.notepad;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Timer;
import java.util.TimerTask;
import android.os.Bundle;
import android.os.Environment;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.util.Log;
import android.view.ContextMenu;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.View.OnClickListener;
import android.view.View.OnCreateContextMenuListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends Activity {
	private TextView addtravels;
	private ListView travelslist;
	private DBManage dm=null;
	private HTMLManager HM=null;
	public Cursor cursor = null;
	public Cursor cursor2=null;
	private int i=0;
	private int start=0;
	private int end=0;
	private String str1=null;
	private String str2="[";
	private String str4="]";
	private String iconname=null;
	private File copyfromfile=null;
	private File copyintofile=null;
	private FileOutputStream copyinto=null;
	private FileInputStream copyfrom=null;
	private ListViewAdd adapter;// 数据源对象
	private static Boolean isExit = false;  
    private static Boolean hasTask = false;
	public static final String CHECK_STATE = "0";
	public static final String EDIT_STATE = "1";
	public static final String ALERT_STATE = "2";
    Timer tExit = new Timer();  
    TimerTask task = new TimerTask() {  
        @Override  
        public void run() {  

            isExit = true;  

            hasTask = true;  
        }  
    }; 
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        addtravels=(TextView)findViewById(R.id.addtravels);
        addtravels.setOnClickListener(new addListener());
        travelslist=(ListView)findViewById(R.id.travelslist);
        dm=new DBManage(this);
        HM=new HTMLManager();
        initAdapter();       
        travelslist.setAdapter(adapter);
        travelslist.setOnItemClickListener(new myOnItemClickListener());
        travelslist.setOnCreateContextMenuListener(new myOnCreateContextMenuListener());//设置长按监听器
    }
    class addListener implements OnClickListener{

		public void onClick(View v) {
			// TODO Auto-generated method stub
			Intent intent=new Intent();
			intent.setClass(MainActivity.this, edittravels.class);
			intent.putExtra("state", EDIT_STATE);
			startActivity(intent);
			finish();
		}
    	
    }

	public void initAdapter(){
    	
    	dm.open();//打开数据库操作对象
    	
    	cursor = dm.selectAll();//获取所有数据
    	
    	cursor.moveToFirst();//将游标移动到第一条数据，使用前必须调用
    	
    	int count = cursor.getCount();//个数
    	
    	ArrayList<String> items = new ArrayList<String>();
    	ArrayList<String> times = new ArrayList<String>();
    	for(int i= 0; i < count; i++){
    		items.add(cursor.getString(