android 记事本程序源码
应用实现密码登陆，记事本内容可增删改除等操作，用listview显示每次保存的记事内容，实现了记事本的基本功能。代码都有详细注解。
1、代码的目录
密码登陆使用的是sharedpreferences记录输入的密码，sharedPreferences简单介绍
做软件开发应该都知道，很多软件会有配置文件，里面存放这程序运行当中的各个属性值，由于其配置信息并不多，如果采用数据库来存放并不划算，因为数据库连接跟操作等耗时大大影响了程序的效率，因此我们使用键值这种一一对应的关系来存放这些配置信息。SharedPreferences正是Android中用于实现这中存储方式的技术。
SharedPreferences的使用非常简单，能够轻松的存放数据和读取数据。SharedPreferences只能保存简单类型的数据，例如，String、int等。一般会将复杂类型的数据转换成Base64编码，然后将转换后的数据以字符串的形式保存在XML文件中，再用SharedPreferences保存。
使用SharedPreferences保存key-value对的步骤如下：
（1）使用Activity类的getSharedPreferences方法获得SharedPreferences对象，其中存储key-value的文件的名称由getSharedPreferences方法的第一个参数指定。
（2）使用SharedPreferences接口的edit获得SharedPreferences.Editor对象。
（3）通过SharedPreferences.Editor接口的putXxx方法保存key-value对。其中Xxx表示不同的数据类型。例如：字符串类型的value需要用putString方法。
（4）通过SharedPreferences.Editor接口的commit方法保存key-value对。commit方法相当于数据库事务中的提交（commit）操作。
//对密码进行判断如果任意一个为空就继续执行
if((num.equals(""))||(num.equals(""))||(num.equals(""))||(num.equals(""))||(num.equals(""))){
SharedPreferences preferences=getSharedPreferences("softinfo",Context.MODE_WORLD_READABLE);
Editor edit=preferences.edit();
Button btn1 = (Button) v;
String input1 = btn1.getText().toString();
editNum[number1].setText(input1);
// Toast.makeText(getApplication(),editNum[number1].getText().toString(), Toast.LENGTH_SHORT).show();
// display.setText(input);
number1++;
if(number1>4){
number1 = 0;
for(int i=0;i<10;i++){
btnNum[i].setEnabled(false);
}
}
// edit.clear().commit();
//第一次输入数据保存到sharedpreference
edit.putString("editNum[0]", editNum[0].getText().toString());
edit.putString("editNum[1]", editNum[1].getText().toString());
edit.putString("editNum[2]", editNum[2].getText().toString());
edit.putString("editNum[3]", editNum[3].getText().toString());
edit.putString("editNum[4]", editNum[4].getText().toString());
edit.commit();
// read();
if(number1 ==3){
Toast.makeText(getApplication(), "输完后请再输入一次密码", Toast.LENGTH_SHORT).show();
}
}package com.example.diary;
import java.util.regex.Pattern;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
/**
* 首页
* @author xing
*
*/
public class Login extends Activity implements OnClickListener {
Boolean flag;
@SuppressWarnings("unused")
private TextView display;
private Button c,clear,cancel,helplogin;
private Button[] btnNum = new Button[10];// 数值按钮
private EditText[] editNum = new EditText[5];// 数值按钮
int number = 0;
int number1 = 0;
int editnumber = 0;
String num="",num1="",num2="",num3="",num4="";//定义5个输入密码
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
initUI();
}
/**
* 初始化UI
*/
private void initUI() {
helplogin = (Button)findViewById(R.id.helplogin);
helplogin.setOnClickListener(new helploginListener());
c = (Button)findViewById(R.id.c);
c.setOnClickListener(new cListener());
clear = (Button)findViewById(R.id.clear);
clear.setOnClickListener(new clearListener());
cancel = (Button)findViewById(R.id.cancel);
cancel.setOnClickListener(new cancelListener());
display = (TextView)findViewById(R.id.display);
editNum[0] = (EditText)findViewById(R.id.editone);
editNum[1] = (EditText)findViewById(R.id.edittwo);
editNum[2] = (EditText)findViewById(R.id.editthree);
editNum[3] = (EditText)findViewById(R.id.editfour);
editNum[4] = (EditText)findViewById(R.id.editfive);
// TODO Auto-generated method stub
btnNum[0] = (Button)findViewById(R.id.one);
btnNum[1] = (Button)findViewById(R.id.two);
btnNum[2] = (Button)findViewById(R.id.three);
btnNum[3] = (Button)findViewById(R.id.four);
btnNum[4] = (Button)findViewById(R.id.five);
btnNum[5] = (Button)findViewById(R.id.six);
btnNum[6] = (Button)findViewById(R.id.seven);
btnNum[7] = (Button)findViewById(R.id.eight);
btnNum[8] = (Button)findViewById(R.id.nine);
btnNum[9] = (Button)findViewById(R.id.zero);
read();
//给全部按钮添加监听器
for(int i=0;i<10;i++){
btnNum[i].setOnClickListener(this);
}
// handler.removeCallbacks(runnable);
// handler.postDelayed(runnable,200);
}
//刷新线程，没用，输入一个密码就会不能再输入
private Handler handler = new Handler();
private Runnable runnable = new Runnable() {
public void run () {
read();
handler.postDelayed(this,1000);
}
};
/**
* 所有数字控件的监听器
*/
@SuppressWarnings("deprecation")
public void onClick(View v) {
//对密码进行判断如果任意一个为空就继续执行
if((num.equals(""))||(num.equals(""))||(num.equals(""))||(num.equals(""))||(num.equals(""))){
SharedPreferences preferences=getSharedPreferences("softinfo",Context.MODE_WORLD_READABLE);
Editor edit=preferences.edit();
Button btn1 = (Button) v;
String input1 = btn1.getText().toString();
editNum[number1].setText(input1);
// Toast.makeText(getApplication(),editNum[number1].getText().toString(), Toast.LENGTH_SHORT).show();
// display.setText(input);
number1++;
if(number1>4){
number1 = 0;
for(int i=0;i<10;i++){
btnNum[i].setEnabled(false);
}
}
// edit.clear().commit();
//第一次输入数据保存到sharedpreference
edit.putString("editNum[0]", editNum[0].getText().toString());
edit.putString("editNum[1]", editNum[1].getText().toString());
edit.putString("editNum[2]", editNum[2].getText().toString());
edit.putString("editNum[3]", editNum[3].getText().toString());
edit.putString("editNum[4]", editNum[4].getText().toString());
edit.commit();
// read();
if(number1 ==3){
Toast.makeText(getApplication(), "输完后请再输入一次密码", Toast.LENGTH_SHORT).show();
}
}
//判断输入的密码是否被记录了，如果都有了就执行匹配，匹配对了就跳转到firstpage页面
if(isNumeric(num)&&isNumeric(num1)&&isNumeric(num2)&&isNumeric(num3)&&isNumeric(num4)){
Button btn = (Button) v;
String input = btn.getText().toString();
editNum[number].setText(input);
//判断如果输入密码与首次输入密码相同则跳转到firstFage
// display.setText(input);
if((num.equals(editNum[0].getText().toString()))&&(num1.equals(editNum[1].getText().toString()))&&(num2.equals(editNum[2].getText().toString()))
&&(num3.equals(editNum[3].getText().toString()))&&(num4.equals(editNum[4].getText().toString()))){
Intent intent = new Intent(Login.this,Firstpage.class);
startActivity(intent);
}
// display.setText(editNum[number].getText().toString());
editnumber++;
// Toast.makeText(getApplication(), editnumber, Toast.LENGTH_SHORT).show();
if(editnumber>4){
editnumber=4;
}
number++;
if(number>4){
number = 0;
//输完密码后设置控件为不可操作状态
for(int i=0;i<10;i++){
btnNum[i].setEnabled(false);
}
}
//Toast.makeText(getApplication(),editNum[4].getText().toString()+":"+editNum[3].getText().toString()+":"+ editNum[2].getText().toString(), Toast.LENGTH_SHORT).show();
}
}
/**
* 判断是否是0-9数字
* @param str
* @return pattern.matcher(str).matches()
*/
public static boolean isNumeric(String str){
Pattern pattern = Pattern.compile("[0-9]*");
return pattern.matcher(str).matches();
}
/**
* 帮助
* @author xing
*
*/
public class helploginListener implements OnClickListener{
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
dialog();
}
}
/**
* 帮助对话框
*/
protected void dialog() {
AlertDialog.Builder builder = new Builder(this);
builder.setMessage(R.string.helpcontent);
builder.setIcon(R.drawable.ic_launcher);
builder.setTitle("温馨提示");
builder.setPositiveButton("确认", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
});
builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
});
builder.create().show();
}
public class cListener implements OnClickListener{
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
// SharedPreferences sp = getSharedPreferences("loginUser", Context.MODE_PRIVATE);
// Editor editor = sp.edit();
// editor.clear();
// editor.commit();
// display.setText("");
read();
// for(int i=0;i<5;i++){
// editNum[i].setText("");
// }
btnsetEnabled();
number--;
if(number<0){
number=0;
}
editNum[editnumber].setText("");
//display.setText(editnumber+":"+number);
editnumber--;
if(editnumber<0){
editnumber=0;
}
}
}
/**
* 清空数据监听器
* @author aeon
*
*/
public class clearListener implements OnClickListener{
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
for(int i=0;i<5;i++){
editNum[i].setText("");
}
btnsetEnabled();
read();
}
}
/**
* 退出监听器
* @author aeon
*
*/
public class cancelListener implements OnClickListener{
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
finish();
}
}
/**
* 读取sharedpreference数据
*/
public void read(){
SharedPreferences ferences=getSharedPreferences("softinfo",0);
num=ferences.getString("editNum[0]", "");
num1=ferences.getString("editNum[1]", "");
num2=ferences.getString("editNum[2]", "");
num3=ferences.getString("editNum[3]", "");
num4=ferences.getString("editNum[4]", "");
// display.setText(num+num1+num2+num3+num4);
// if((num.equals(""))||(num.equals(""))||(num.equals(""))||(num.equals(""))||(num.equals(""))){
// flag = true;
// Toast.makeText(getApplication(), "输完后请再输入一次密码", Toast.LENGTH_SHORT).show();
// }else{
// flag = false;
// }
}
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
for(int i=0;i<10;i++){
btnNum[i].setEnabled(true);
}
handler.removeCallbacks(runnable);//停止定时器
super.onDestroy();
}
/**
* 设置控件可操作
*/
public void btnsetEnabled(){
for(int i=0;i<10;i++){
btnNum[i].setEnabled(true);
}
}
/**
* onRestart时控件变为可操作状态，并清空密码显示
*/
@Override
protected void onRestart() {
// TODO Auto-generated method stub
super.onRestart();
btnsetEnabled();//设置控件可操作
//清空密码
for(int i=0;i<5;i++){
editNum[i].setText("");
}
}
}布局实现代码：主要使用了线性布局
2、在写记事本中记录数据使用了sqlite数据库，因为现在的主流移动设备像Android、iPhone等都使用SQLite作为复杂数据的存储引擎，在我们为移动设备开发应用程序时，也许就要使用到SQLite来存储我们大量的数据，所以我们就需要掌握移动设备上的SQLite开发技巧。对于Android平台来说，系统内置了丰富的API来供开发人员操作SQLite，我们可以轻松的完成对数据的存取。
/**
* 保存数据监听器
* @author aeon
*
*/
public class saveListener implements OnClickListener{
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
SimpleDateFormat sDateFormat = new SimpleDateFormat("yyyy-MM-dd");
data = sDateFormat.format(new java.util.Date());
//if(diary!=null)
// {
//return;
People people = new People();
people.Time = data;
people.Diary = diarycontent.getText().toString();//获取输入日志内容
//people.Height = 1;
long colunm = dbAdapter.insert(people);
if(colunm == -1)
{
Toast.makeText(getApplication(), "添加错误", Toast.LENGTH_SHORT).show();
}
else
{
Toast.makeText(getApplication(), "成功添加数据 ", Toast.LENGTH_SHORT).show();
// Toast.makeText(getApplication(), "成功添加数据 , ID: "+String.valueOf(colunm), Toast.LENGTH_SHORT).show();
}
// Firstpage.displaydiary1();//当点击保存后更新listview列表数据
finish();//写完日记后结束该activity以免多次保存
}
}/**
* 修改内容监听器
* @author xing
*
*/
public class changeListener implements OnClickListener{
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
People people = new People();
people.Diary = diarycontent.getText().toString();
people.Time = data;
//people.Height = Float.parseFloat(heightEdit.getText().toString());
Intent intent=getIntent();
timeid=intent.getStringExtra("timeid");
if(timeid!=null){
int id = Integer.parseInt(timeid);
// Toast.makeText(getApplication(),timeid, Toast.LENGTH_SHORT).show();
long count = dbAdapter.updateOneData(id, people);
if(count == -1 )
{
Toast.makeText(getApplication(), "更新错误", Toast.LENGTH_SHORT).show();
//display.setText("");
}
else
{
//Toast.makeText(getApplication(), "更新成功"+"更新数据第"+String.valueOf(id)+"条", Toast.LENGTH_SHORT).show();
Toast.makeText(getApplication(), "更新成功", Toast.LENGTH_SHORT).show();
}
finish();
}else{
Toast.makeText(getApplication(), "请点击保存", Toast.LENGTH_SHORT).show();
}
//hintKb();
}
}删除记事本代码
/**
* 删除所有记事对话框
*/
public void showdeleteDialog(){
AlertDialog.Builder builder = new AlertDialog.Builder(this);
LayoutInflater inflater = getLayoutInflater();
View layout = inflater.inflate(R.layout.dialog, null);
builder.setView(layout);
builder.setIcon(R.drawable.ic_launcher);
builder.setTitle(R.string.firstdialogtitle);
builder.setMessage("请问您是否要删除所有记事？");
builder.setPositiveButton("ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface arg0, int arg1) {
// TODO Auto-generated method stub
dbAdapter.deleteAllData();
Diaryadapter.clear(); //删除数据后清空listview显示
Toast.makeText(getApplication(), "日志已删除", Toast.LENGTH_SHORT).show();
}
});
builder.setNegativeButton("cancel",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
final AlertDialog dlg = builder.create();
dlg.show();
}/**
* 编辑该天事件监听器
*/
Button editordialog = (Button)layout.findViewById(R.id.editordialog);
editordialog.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent intent = new Intent(Firstpage.this,WriteDiaryActivity.class);
String spStr[] = itemdata1.split("日记内容:");//匹配字符串
String spStr1[] = itemdata1.split(",时间");//匹配字符串
intent.putExtra("diary", spStr[1]); //获取内容
intent.putExtra("timeid", spStr1[0]);//获取id
//intent.putExtra("", "");
// Bundle bundle=new Bundle();
// bundle.putString("result", "第一个activity的内容");
// bundle.putString("content",content);
// intent.putExtras(bundle);
startActivity(intent);
//finish();//跳转后结束dialog
}
});package com.example.diary;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import tree.love.Adapter.DBAdapter;
import tree.love.Bean.People;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.media.AudioManager;
import android.media.SoundPool;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.Display;
import android.view.LayoutInflater;
import android.view.View;
import android.view.WindowManager;
import android.view.View.OnClickListener;
import android.view.inputmethod.InputMethodManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
public class WriteDiaryActivity extends Activity {
private TextView time;
private Button takephoto;
private Button finish;
private Button delete;
private Button change;
private EditText diarycontent;
private Button scanphoto;
private Button save;
private Button autocam;
private ImageView imageview4,imageview1,imageview2,imageview3;
private SoundPool sp;//声明一个SoundPool
private int music;//定义一个整型用load（）；来设置suondID
private DBAdapter dbAdapter;
int count = 0;
String diary;
String data;
String aa;
String timeid;
// Firstpage Firstpage = new Firstpage();
int num=0;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
//去除标题
// requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.writediarycome);
//初始化UI
initUI();
//获得实例
dbAdapter = new DBAdapter(this);
//打开数据库
dbAdapter.open();
}
// /**
// * 判断输入内容是否为空
// * @return
// */
// boolean isRight()
// {
// if(diary.length() == 0)
// {
// Toast.makeText(getApplication(), "请输入符合场常理的数据", Toast.LENGTH_SHORT).show();
// return false;
// }else
// {
// return true;
// }
// }
/**
* 初始化UI控件
*/
private void initUI() {
// TODO Auto-generated method stub
//获取声音文件
sp= new SoundPool(10, AudioManager.STREAM_SYSTEM, 5);//第一个参数为同时播放数据流的最大个数，第二数据流类型，第三为声音质量
music = sp.load(this, R.raw.jie, 1); //把你的声音素材放到res/raw里，第2个参数即为资源文件，第3个为音乐的优先级
autocam = (Button)findViewById(R.id.autocam);
autocam.setOnClickListener(new autocamListener());
imageview3 = (ImageView)findViewById(R.id.imageview3);
imageview3.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
getCurrentScreen();
sp.play(music, 1, 1, 0, 0, 1); //拍照声音
}
});
save = (Button)findViewById(R.id.save);
save.setOnClickListener(new saveListener());
change = (Button)findViewById(R.id.change);
change.setOnClickListener(new changeListener());
diarycontent = (EditText)findViewById(R.id.diarycontent);
diary = diarycontent.getText().toString();
delete = (Button)findViewById(R.id.delete);
delete.setOnClickListener(new deleteListener());
finish = (Button)findViewById(R.id.finish);
finish.setOnClickListener(new finishListener());
imageview4 = (ImageView)findViewById(R.id.imageview4);
imageview4.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
finish();
}
});
takephoto = (Button)findViewById(R.id.takephoto);
takephoto.setOnClickListener(new takephotoListener());
imageview1 = (ImageView)findViewById(R.id.imageview1);
imageview1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, 1);
}
});
scanphoto = (Button)findViewById(R.id.sanphoto);
scanphoto.setOnClickListener(new scanphotoListener());
imageview2 = (ImageView)findViewById(R.id.imageview2);
imageview2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent intent = new Intent(WriteDiaryActivity.this,Scanphoto.class);
startActivity(intent);
}
});
time = (TextView)findViewById(R.id.time);
time();//获取手机当前时间
time1();//获取手机日期，年月日
receiveaadata();
}
/**
* 接收显示编辑diary
*/
public void receiveaadata(){
Intent intent=getIntent();
aa=intent.getStringExtra("diary");
diarycontent.setText(aa);
if(aa!=null){
save.setEnabled(false);//设置保存按钮为不可操作状态
}
}
/**
* 保存数据监听器
* @author aeon
*
*/
public class saveListener implements OnClickListener{
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
SimpleDateFormat sDateFormat = new SimpleDateFormat("yyyy-MM-dd");
data = sDateFormat.format(new java.util.Date());
//if(diary!=null)
// {
//return;
People people = new People();
people.Time = data;
people.Diary = diarycontent.getText().toString();//获取输入日志内容
//people.Height = 1;
long colunm = dbAdapter.insert(people);
if(colunm == -1)
{
Toast.makeText(getApplication(), "添加错误", Toast.LENGTH_SHORT).show();
}
else
{
Toast.makeText(getApplication(), "成功添加数据 ", Toast.LENGTH_SHORT).show();
// Toast.makeText(getApplication(), "成功添加数据 , ID: "+String.valueOf(colunm), Toast.LENGTH_SHORT).show();
}
// Firstpage.displaydiary1();//当点击保存后更新listview列表数据
finish();//写完日记后结束该activity以免多次保存
}
}
/**
* 修改内容监听器
* @author xing
*
*/
public class changeListener implements OnClickListener{
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
People people = new People();
people.Diary = diarycontent.getText().toString();
people.Time = data;
//people.Height = Float.parseFloat(heightEdit.getText().toString());
Intent intent=getIntent();
timeid=intent.getStringExtra("timeid");
if(timeid!=null){
int id = Integer.parseInt(timeid);
// Toast.makeText(getApplication(),timeid, Toast.LENGTH_SHORT).show();
long count = dbAdapter.updateOneData(id, people);
if(count == -1 )
{
Toast.makeText(getApplication(), "更新错误", Toast.LENGTH_SHORT).show();
//display.setText("");
}
else
{
//Toast.makeText(getApplication(), "更新成功"+"更新数据第"+String.valueOf(id)+"条", Toast.LENGTH_SHORT).show();
Toast.makeText(getApplication(), "更新成功", Toast.LENGTH_SHORT).show();
}
finish();
}else{
Toast.makeText(getApplication(), "请点击保存", Toast.LENGTH_SHORT).show();
}
//hintKb();
}
}
/**
* 打开与关闭软件键盘
*/
@SuppressWarnings("unused")
private void hintKb() {
InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
// 得到InputMethodManager的实例
if (imm.isActive()) {
// 如果开启
imm.toggleSoftInput(InputMethodManager.SHOW_IMPLICIT,
InputMethodManager.HIDE_NOT_ALWAYS);
// 关闭软键盘，开启方法相同，这个方法是切换开启与关闭状态的
}
}
/**
* 删除监听器
* @author aeon
*
*/
public class deleteListener implements OnClickListener{
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
showDialog();
}
}
/**
* delete自定义对话框
* @author ning
*
*/
public void showDialog(){
AlertDialog.Builder builder = new AlertDialog.Builder(this);
LayoutInflater inflater = getLayoutInflater();
View layout = inflater.inflate(R.layout.dialog, null);
builder.setView(layout);
builder.setIcon(R.drawable.ic_launcher);
builder.setTitle(R.string.dialogtitle);
builder.setMessage("请问您是否要删除该天记事？");
builder.setPositiveButton("ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface arg0, int arg1) {
// TODO Auto-generated method stub
diarycontent.setText("");
Toast.makeText(getBaseContext(), "删除成功", Toast.LENGTH_SHORT).show();
}
});
builder.setNegativeButton("cancel",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
//finish();
}
});
final AlertDialog dlg = builder.create();
dlg.show();
}
/**
* 退出监听器
* @author aeon
*
*/
public class finishListener implements OnClickListener{
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
//结束本页面与logoActivity,返回到登录页面
// Intent intent = new Intent();
// intent.setClass(WriteDiaryActivity.this, MainActivity.class);
// intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); //注意本行的FLAG设置
// startActivity(intent);
finish();
}
}
/**
* takephoto监听器
*
* */
public class takephotoListener implements OnClickListener{
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, 1);
}
}
/*
* 获取时间
* return null
* */
public void time(){
SimpleDateFormat sDateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm");
String date = sDateFormat.format(new java.util.Date());
time.setText(date);
}
/**
* 获取手机当前年月日
*/
public void time1(){
SimpleDateFormat sDateFormat = new SimpleDateFormat("yyyy-MM-dd");
data = sDateFormat.format(new java.util.Date());
}
/**
* 浏览拍好的图片
* @author aeon
*
*/
public class scanphotoListener implements OnClickListener{
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
//scanphotodialog();
Intent intent = new Intent(WriteDiaryActivity.this,Scanphoto.class);
startActivity(intent);
}
}
/**执行拍照
* (non-Javadoc)
* @see android.app.Activity#onActivityResult(int, int, android.content.Intent)
* @param requestCode \resultCode \data
* Exception 当不加权限的时候会报空指针
*/
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
if(resultCode == Activity.RESULT_OK ){
count++;
String sdStatus = Environment.getExternalStorageState();
if (!sdStatus.equals(Environment.MEDIA_MOUNTED)) { // 检测sd是否可用
Log.i("TestFile",
"SD card is not avaiable/writeable right now.");
return;
}
//String name = new DateFormat().format("yyyyMMdd_hhmmss",Calendar.getInstance(Locale.CHINA)) + ".jpg";
//Toast.makeText(this, name, Toast.LENGTH_LONG).show();
Bundle bundle = data.getExtras();
Bitmap bitmap = (Bitmap) bundle.get("data");// 获取相机返回的数据，并转换为Bitmap图片格式
FileOutputStream b = null;
File file = new File("/sdcard/data/");
file.mkdirs();// 创建文件夹
// String fileName = "/sdcard/data/"+name;
String s = String.valueOf(count)+".jpg";
String fileName = "/sdcard/data/"+s;
try {
b = new FileOutputStream(fileName);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, b);// 把数据写入文件
} catch (FileNotFoundException e) {
e.printStackTrace();
} finally {
try {
b.flush();
b.close();
} catch (IOException e) {
e.printStackTrace();
}
}
// ((ImageView) findViewById(R.id.imageview)).setImageBitmap(bitmap);// 将图片显示在ImageView里
}
super.onActivityResult(requestCode, resultCode, data);
}
/**
* autocam监听器
* @author aeon
*
*/
public class autocamListener implements OnClickListener{
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
getCurrentScreen();
}
}
/**
* 截屏
*/
@SuppressWarnings("deprecation")
public void getCurrentScreen() {
num++;
// 1.构建Bitmap
WindowManager windowManager = getWindowManager();
Display display = windowManager.getDefaultDisplay();
int w = display.getWidth();//w=480
int h = display.getHeight();//h=800
Bitmap imageBitmap = Bitmap.createBitmap(w, h, Config.ARGB_8888);//最后一个参数叫位图结构
//ARGB--Alpha,Red,Green,Blue.
//ARGB为一种色彩模式,也就是RGB色彩模式附加上Alpha(透明度)通道,常见于32位位图的存储结构。
// 2.获取屏幕
View decorview = this.getWindow().getDecorView();//decor意思是装饰布置
decorview.setDrawingCacheEnabled(true);
imageBitmap = decorview.getDrawingCache();
// String SaveImageFilePath = getSDCardPath() + "/gameCounter";//保存图片的文件夹路径
String SaveImageFilePath = getSDCardPath() + "/data";//保存图片的文件夹路径 data为新建文件夹
// 3.保存Bitmap
try {
File path = new File(SaveImageFilePath);
// String imagepath = SaveImageFilePath + "/data" + ".png";//保存图片的路径
String imagepath = SaveImageFilePath + "/data"+num + ".png";//保存图片的路径
File file = new File(imagepath);
if (!path.exists()) {
path.mkdirs();
}
if (!file.exists()) {
file.createNewFile();
}
FileOutputStream fos = null;
fos = new FileOutputStream(file);
if (null != fos) {
//imageBitmap.compress(format, quality, stream);
//把位图的压缩信息写入到一个指定的输出流中
//第一个参数format为压缩的格式
//第二个参数quality为图像压缩比的值,0-100.0 意味着小尺寸压缩,100意味着高质量压缩
//第三个参数stream为输出流
imageBitmap.compress(Bitmap.CompressFormat.PNG, 90, fos);
fos.flush();
fos.close();
Toast.makeText(this,"图片已经已保存在手机卡data文件目录下",Toast.LENGTH_LONG).show();
//text.setText("图片已经已保存至"+SaveImageFilePath);
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 获取SDCard的目录路径功能
*/
private String getSDCardPath() {
String SDCardPath = null;
// 判断SDCard是否存在
boolean IsSDcardExist = Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED);
if (IsSDcardExist) {
SDCardPath = Environment.getExternalStorageDirectory().toString();//SD卡的路径为: /mnt/sdcard
}
return SDCardPath;
}
/**
* 结束时关闭数据库
*/
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
dbAdapter.close();//关闭数据库
}
}布局代码：
实现记事本内容代码：
package com.example.diary;
import tree.love.Adapter.DBAdapter;
import tree.love.Bean.People;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.Window;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.ListView;
import android.widget.PopupWindow;
import android.widget.Toast;
public class Firstpage extends Activity {
private Button writediary;
private Button set;
private Button deletediary;
private Button scandiary;
private Button firstfinish;
private ListView diarylistview;
private PopupWindow popupwindow;
private DBAdapter dbAdapter;
String result = "";
String itemdata,itemdata1;
// String iddiary;
private ArrayAdapter Diaryadapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
//去除标题
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.firstpage);
//获得实例
dbAdapter = new DBAdapter(this);
//打开数据库
dbAdapter.open();
initUI();
}
/**
* 初始化UI
*/
private void initUI() {
// TODO Auto-generated method stub
// 初使化设备存储数组
Diaryadapter = new ArrayAdapter(this, R.layout.listview_format);
diarylistview = (ListView)findViewById(R.id.diaryshow);
diarylistview.setOnItemClickListener(new diarylistviewItemListener());
//Diaryadapter.clear();
diarylistview.setAdapter(Diaryadapter);
firstfinish = (Button)findViewById(R.id.firstfinish);
firstfinish.setOnClickListener(new firstfinishListener());
set = (Button)findViewById(R.id.set);
set.setOnClickListener(new setListener());
writediary = (Button)findViewById(R.id.writediary);
writediary.setOnClickListener(new writeListener());
deletediary = (Button)findViewById(R.id.deletediary);
deletediary.setOnClickListener(new deletediaryListener());
scandiary = (Button)findViewById(R.id.scandiary);
scandiary.setOnClickListener(new scandiaryListener());
displaydiary();//登录进去后显示所有日记
photodialog();
// handler.removeCallbacks(runnable);
// handler.postDelayed(runnable,1000);
}
/**
* 由于更新完数据和写完日记后listview不能自动更新，如果在writeDiaryActivity调用display()
* 方法会出现空指针，因此添加一个定时器定时刷新listview
*/
private Handler handler = new Handler();
private Runnable runnable = new Runnable() {
public void run () {
displaydiary();
handler.postDelayed(this,1000);
}
};
/**
* 退出
* @author aeon
*
*/
public class firstfinishListener implements OnClickListener{
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
finish();
}
}
/**
* listview item事件监听器，并根据listview id获取到数据库数据，再赋值给itemdata1
* @author aeon
*
*/
public class diarylistviewItemListener implements OnItemClickListener{
@Override
public void onItemClick(AdapterView arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
for(int i=0;i<1000;i++){
if(arg2 ==i){
itemdata = Diaryadapter.getItem(arg2);
Diaryadapter.clear();
String result1 = "";
String c = String.valueOf(arg3);
int cc = Integer.parseInt(c);
People[] peoples = dbAdapter.queryAllData();
for (int j = 0; j < peoples.length; j++)
{
result1 =peoples[cc].toString()+"\n";
}
itemdata1 = result1;
showItemDialog(); //点击listviewitem后弹出item对话框
}
}
}
}
/**
* deletediary 监听器
* @author aeon
*
*/
public class deletediaryListener implements OnClickListener{
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
showdeleteDialog(); //弹出是否删除全部数据对话框
// dbAdapter.deleteAllData();
// Diaryadapter.clear(); //删除数据后清空listview显示
// Toast.makeText(getApplication(), "日志已删除", Toast.LENGTH_SHORT).show();
}
}
/**
* scandiary 监听器
* @author aeon
*
*/
public class scandiaryListener implements OnClickListener{
@Override
public void onClick(View arg0) {
displaydiary();
// TODO Auto-generated method stub
// People[] peoples = dbAdapter.queryAllData();
// if(peoples == null)
// {
// Toast.makeText(getApplication(), "数据库里面没有数据", Toast.LENGTH_SHORT).show();
// return;
// }
// // Toast.makeText(getApplication(), "数据库:", Toast.LENGTH_SHORT).show();
// //String result = "";
// //该方式会使所有数据都添加到一个item里面去
// for (int i = 0; i < peoples.length; i++)
// {
// result += peoples[i].toString()+"\n";
// // result = peoples[i].toString()+"\n";
//
// }
// //Diaryadapter.clear();
// Diaryadapter.add(result);
// result = ""; //添加完后将result清空，防止下次点击会累加
// scandiary.setEnabled(false);
// display.setText(result);
}
}
/**
* 更新listview数据并拆分数据得到id和时间后面的数据
*/
public void displaydiary(){
Diaryadapter.clear();
People[] peoples = dbAdapter.queryAllData();
if(peoples == null)
{
// Toast.makeText(getApplication(), "数据库里面没有数据", Toast.LENGTH_SHORT).show();
return;
}
for (int i = 0; i < peoples.length; i++)
{
result = peoples[i].toString()+"\n";
String spStrone[] = result.split(",时间:");//匹配字符串
Diaryadapter.add(spStrone[1]);
}
result = ""; //添加完后将result清空，防止下次点击会累加
}
/**
* 打开列表监听器
* @author aeon
*
*/
public class setListener implements OnClickListener{
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.set:
set.setText("设置");
if (popupwindow != null&&popupwindow.isShowing()) {
popupwindow.dismiss();
return;
} else {
set.setText("关闭");
initmPopupWindowView();
popupwindow.showAsDropDown(v, 0, 5);
}
break;
default:
break;
}
}
}
/**
* 弹出列表method
*/
public void initmPopupWindowView() {
// // 获取自定义布局文件pop.xml的视图
View customView = getLayoutInflater().inflate(R.layout.view_item,
null, false);
// 创建PopupWindow实例,200,150分别是宽度和高度
popupwindow = new PopupWindow(customView, 300, 300);
// 设置动画效果 [R.style.AnimationFade 是自己事先定义好的]
popupwindow.setAnimationStyle(R.style.AnimationFade);
// 自定义view添加触摸事件
customView.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (popupwindow != null && popupwindow.isShowing()) {
popupwindow.dismiss();
popupwindow = null;
}
return false;
}
});
//初始化view_item UI
Button grid = (Button) customView.findViewById(R.id.grid);
Button list = (Button) customView.findViewById(R.id.more);
final CheckBox gridCB = (CheckBox)customView.findViewById(R.id.gridCB);
final CheckBox listCB = (CheckBox)customView.findViewById(R.id.listCB);
//宫格显示监听
gridCB.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){
public void onCheckedChanged(android.widget.CompoundButton compoundButton, boolean b){
//popupwindow.dismiss();
gridCB.setChecked(true);
Toast.makeText(getApplication(),"gridCB",Toast.LENGTH_LONG).show();
}
});
//列表显示监听
listCB.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){
public void onCheckedChanged(android.widget.CompoundButton compoundButton, boolean b){
//popupwindow.dismiss();
listCB.setChecked(true);
Toast.makeText(getApplication(),"listCB",Toast.LENGTH_LONG).show();
}
});
//设置
grid.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent intent = new Intent(Firstpage.this,Setting.class);
startActivity(intent);
set.setText("设置");
popupwindow.dismiss();
}
});
//list按钮监听器
list.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
//Intent intent = new Intent(Firstpage.this,Image.class);
//startActivity(intent);
Toast.makeText(getApplicationContext(), "没有更多选项了", Toast.LENGTH_SHORT).show();
set.setText("设置");
popupwindow.dismiss();
}
});
}
/**
* 写笔记监听器
* @author aeon
*
*/
public class writeListener implements OnClickListener{
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent intent = new Intent(Firstpage.this,WriteDiaryActivity.class);
startActivity(intent);
}
}
/**
* 删除所有记事对话框
*/
public void showdeleteDialog(){
AlertDialog.Builder builder = new AlertDialog.Builder(this);
LayoutInflater inflater = getLayoutInflater();
View layout = inflater.inflate(R.layout.dialog, null);
builder.setView(layout);
builder.setIcon(R.drawable.ic_launcher);
builder.setTitle(R.string.firstdialogtitle);
builder.setMessage("请问您是否要删除所有记事？");
builder.setPositiveButton("ok", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface arg0, int arg1) {
// TODO Auto-generated method stub
dbAdapter.deleteAllData();
Diaryadapter.clear(); //删除数据后清空listview显示
Toast.makeText(getApplication(), "日志已删除", Toast.LENGTH_SHORT).show();
}
});
builder.setNegativeButton("cancel",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
});
final AlertDialog dlg = builder.create();
dlg.show();
}
/**
* 弹出item事件处理对话框
*/
public void showItemDialog(){
final AlertDialog.Builder builder = new AlertDialog.Builder(this);
LayoutInflater inflater = getLayoutInflater();
final View layout = inflater.inflate(R.layout.item_dialog, null);
builder.setView(layout);
builder.setIcon(R.drawable.ic_launcher);
builder.setTitle(R.string.itemdialogtitle);
//builder.setMessage("");
Button deleteitem = (Button)layout.findViewById(R.id.deleteitem);
/**
* 删除该天记事监听器
*/
deleteitem.setOnClickListener(new OnClickListener() {
@SuppressWarnings("static-access")
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
String spStr1[] = itemdata1.split(",时间");//匹配字符串
int id = Integer.parseInt(spStr1[0]);
long result = dbAdapter.deleteOneData(id);
Log.i(dbAdapter.DB_ACTION, "delete long :"+result);
// String msg = "删除ID为"+id+"的数据" + (result>0?"成功":"失败");
String msg = "数据删除" + (result>0?"成功":"失败");
Toast.makeText(getApplication(), msg, Toast.LENGTH_SHORT).show();
//dlg.dismiss();
displaydiary();
}
});
/**
* 编辑该天事件监听器
*/
Button editordialog = (Button)layout.findViewById(R.id.editordialog);
editordialog.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent intent = new Intent(Firstpage.this,WriteDiaryActivity.class);
String spStr[] = itemdata1.split("日记内容:");//匹配字符串
String spStr1[] = itemdata1.split(",时间");//匹配字符串
intent.putExtra("diary", spStr[1]); //获取内容
intent.putExtra("timeid", spStr1[0]);//获取id
//intent.putExtra("", "");
// Bundle bundle=new Bundle();
// bundle.putString("result", "第一个activity的内容");
// bundle.putString("content",content);
// intent.putExtras(bundle);
startActivity(intent);
//finish();//跳转后结束dialog
}
});
/**
* cancel
*/
builder.setNegativeButton("cancel",
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
//finish();
}
});
final AlertDialog dlg = builder.create();
dlg.show();
}
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
dbAdapter.close();
handler.removeCallbacks(runnable);//关闭定时器
}
//暂停时停止定时器
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
handler.removeCallbacks(runnable);//停止定时器
}
//重启时启动定时器，定时器一直放在初始化中一直执行太耗内存，但会出现少许延迟
@Override
protected void onRestart() {
// TODO Auto-generated method stub
super.onRestart();
handler.removeCallbacks(runnable);
handler.postDelayed(runnable,200);
}
@Override
protected void onStop() {
// TODO Auto-generated method stub
super.onStop();
handler.removeCallbacks(runnable);//停止定时器
}
/**
* 图片对话框
*/
protected void photodialog() {
AlertDialog.Builder builder = new Builder(this);
builder.setIcon(R.drawable.welcome);
builder.setTitle("welcome");
//builder.setMessage("welcome");
builder.setPositiveButton("确认", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
});
builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
});
builder.create().show();
}
}
布局代码：
数据库各种操作方法实现类代码：
package tree.love.Adapter;
import tree.love.Bean.People;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.database.sqlite.SQLiteOpenHelper;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.util.Log;
/**
* @author
*
*/
public class DBAdapter
{
public static final String DB_ACTION="db_action";//LogCat
private static final String DB_NAME="people.db";//数据库名
private static final String DB_TABLE="peopleinfo";//数据库表名
private static final int DB_VERSION=1;//数据库版本号
public static final String KEY_ID = "_id"; //表属性ID
public static final String KEY_NAME = "name";//表属性name
public static final String KEY_AGE = "age";//表属性age
public static final String KEY_HEIGHT = "height";//表属性height
private SQLiteDatabase db ;
private Context xContext ;
private DBOpenHelper dbOpenHelper ;
public DBAdapter(Context context)
{
xContext = context ;
}
/**
* 空间不够存储的时候设为只读
* @throws SQLiteException
*/
public void open() throws SQLiteException
{
dbOpenHelper = new DBOpenHelper(xContext, DB_NAME, null,DB_VERSION);
try
{
db = dbOpenHelper.getWritableDatabase();
}
catch (SQLiteException e)
{
db = dbOpenHelper.getReadableDatabase();
}
}
public void close()
{
if(db != null)
{
db.close();
db = null;
}
}
/**
* 向表中添加一条数据
* @param people
* @return
*/
public long insert(People people)
{
ContentValues newValues = new ContentValues();
newValues.put(KEY_NAME, people.Diary);
newValues.put(KEY_AGE, people.Time);
// newValues.put(KEY_HEIGHT, people.Height);
return db.insert(DB_TABLE, null, newValues);
}
/**
* 删除一条数据
* @param id
* @return
*/
public long deleteOneData(long id)
{
return db.delete(DB_TABLE, KEY_ID+"="+id, null );
}
/**
* 删除所有数据
* @return
*/
public long deleteAllData()
{
return db.delete(DB_TABLE, null, null);
}
/**
* 根据id查询数据的代码
* @param id
* @return
*/
public People[] queryOneData(long id)
{
Cursor result = db.query(DB_TABLE, new String[] {KEY_ID,KEY_NAME,KEY_AGE,KEY_HEIGHT},
KEY_ID+"="+id, null, null, null, null);
return ConvertToPeople(result) ;
}
/**
* 查询全部数据的代码
* @return
*/
public People[] queryAllData()
{
Cursor result = db.query(DB_TABLE, new String[] {KEY_ID,KEY_NAME,KEY_AGE,KEY_HEIGHT},
null, null, null, null, null);
return ConvertToPeople(result);
}
/**
* 更新数据
* @param id
* @param people
* @return
*/
public long updateOneData(long id ,People people)
{
ContentValues newValues = new ContentValues();
newValues.put(KEY_NAME, people.Diary);
newValues.put(KEY_AGE, people.Time);
// newValues.put(KEY_HEIGHT, people.Height);
return db.update(DB_TABLE, newValues, KEY_ID+"="+id, null);
}
private People[] ConvertToPeople(Cursor cursor)
{
int resultCounts = cursor.getCount();
if(resultCounts == 0 || !cursor.moveToFirst())
{
return null ;
}
People[] peoples = new People[resultCounts];
Log.i(DB_ACTION, "PeoPle len:"+peoples.length);
for (int i = 0; i < resultCounts; i++)
{
peoples[i] = new People();
peoples[i].ID = cursor.getInt(0);
peoples[i].Diary = cursor.getString(cursor.getColumnIndex(KEY_NAME));
peoples[i].Time = cursor.getString(cursor.getColumnIndex(KEY_AGE));
// peoples[i].Height = cursor.getFloat(cursor.getColumnIndex(KEY_HEIGHT));
Log.i(DB_ACTION, "people "+i+"info :"+peoples[i].toString());
cursor.moveToNext();
}
return peoples;
}
/**
* 静态Helper类，用于建立、更新和打开数据库
*/
private static class DBOpenHelper extends SQLiteOpenHelper
{
/*
* 手动建库代码
CREATE TABLE peopleinfo
(_id integer primary key autoincrement,
name text not null,
age integer,
height float);*/
private static final String DB_CREATE=
"CREATE TABLE "+DB_TABLE
+" ("+KEY_ID+" integer primary key autoincrement, "
+KEY_NAME+" text not null, "
+KEY_AGE+" integer,"+
KEY_HEIGHT+" float);";
public DBOpenHelper(Context context, String name,
CursorFactory factory, int version)
{
super(context, name, factory, version);
}
@Override
public void onCreate(SQLiteDatabase db)
{
db.execSQL(DB_CREATE);
Log.i(DB_ACTION, "onCreate");
}
@Override
public void onUpgrade(SQLiteDatabase _db, int oldVersion, int newVersion)
{
//函数在数据库需要升级时被调用，
//一般用来删除旧的数据库表，
//并将数据转移到新版本的数据库表中
_db.execSQL("DROP TABLE IF EXISTS "+DB_TABLE);
onCreate(_db);
Log.i(DB_ACTION, "Upgrade");
}
}
}package tree.love.Bean;
public class People {
public int ID = -1;
public String Diary;
public String Time;
@Override
public String toString()
{
String result =this.ID+","+
"时间:"+this.Time+","
+"日记内容:"+this.Diary;
return result;
}
}
详细可看下载代码看：点击打开链接