android实战:密码箱三
本文博客链接:http://blog.csdn.net/jdh99,作者:jdh,转载请注明.
登录界面源代码login.java:
package com.mimaxiang;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class login extends Activity implements View.OnClickListener
{
//全局变量定义
SharedPreferences mima_config;
SharedPreferences.Editor editor;
TextView txt_mima;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.login);
//获得配置文件
mima_config = getSharedPreferences("mima_config", 0);
editor = mima_config.edit();
//写入配置：Id:10000 Name:Jdh
//editor.putString("MiMaMoRen", "1234");
//editor.commit();
Button btn_ok = (Button)findViewById(R.id.button1);
btn_ok.setOnClickListener(this);
Button btn_quit = (Button)findViewById(R.id.button2);
btn_quit.setOnClickListener(this);
//开辟控件空间
txt_mima = (TextView)findViewById(R.id.editText1);
}
@Override
protected void onDestroy() {
super.onDestroy();
//android.os.Process.killProcess(android.os.Process.myPid());
}
@Override
public void onClick(View v)
{
// TODO Auto-generated method stub
switch (v.getId())
{
case R.id.button1:
{
//判断密码是否正确
String str_mima;
str_mima = txt_mima.getText().toString();
//读取配置
String mima = mima_config.getString("MiMa","1234");
if (str_mima.equalsIgnoreCase(mima))
{
//切换界面
Intent intent = new Intent(this,mimaxiang.class);
startActivity(intent);
login.this.finish();
}
else
{
txt_mima.setText("密码错误");
}
break;
}
case R.id.button2:
{
//退出程序
login.this.finish();
break;
}
default:
break;
}
}
}
主界面源代码mimaxiang.java:
package com.mimaxiang;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class mimaxiang extends Activity implements View.OnClickListener
{
DatabaseHelper mOpenHelper;
private static final String DATABASE_NAME = "mimaxiang.db";
private static final int DATABASE_VERSION = 1;
//数据库内容标号
int index = 0;
TextView txt_id;
TextView txt_pwd;
TextView txt_explain;
boolean flag = false;
private static class DatabaseHelper extends SQLiteOpenHelper
{
DatabaseHelper(Context context)
{
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db)
{
//新建一个用户表
db.execSQL("CREATE TABLE MiMaTable ('ID' VARCHAR,'PWD' VARCHAR,'EXPLAIN' VARCHAR)");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)
{
}
}
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mOpenHelper = new DatabaseHelper(this);
Button btn_previous = (Button)findViewById(R.id.button1);
btn_previous.setOnClickListener(this);
Button btn_next = (Button)findViewById(R.id.button2);
btn_next.setOnClickListener(this);
Button btn_del = (Button)findViewById(R.id.button3);
btn_del.setOnClickListener(this);
Button btn_new = (Button)findViewById(R.id.button4);
btn_new.setOnClickListener(this);
Button btn_edit_mima = (Button)findViewById(R.id.button5);
btn_edit_mima.setOnClickListener(this);
Button btn_quit = (Button)findViewById(R.id.button6);
btn_quit.setOnClickListener(this);
//开辟控件空间
txt_id = (TextView)findViewById(R.id.editText1);
txt_pwd = (TextView)findViewById(R.id.editText2);
txt_explain = (TextView)findViewById(R.id.editText3);
//更新界面
//获取数据库
SQLiteDatabase db = mOpenHelper.getWritableDatabase();
//db.execSQL("DELETE FROM MiMaTable");
//db.execSQL("INSERT INTO MiMaTable VALUES (?,?,?)", new Object[]{"jdh1","123456",null});
//db.execSQL("INSERT INTO MiMaTable VALUES (?,?,?)", new Object[]{"jdh2","123456",null});
Cursor cursor = db.rawQuery("SELECT * FROM MiMaTable",new String[]{});
//获得数据库数目
int count = cursor.getCount();
//判断数据库是否为空
if (count != 0)
{
//非空
//判断index是否越界
if (index > count - 1)
{
//越界
index = 0;
}
//更新界面
cursor.moveToPosition(index);
txt_id.setText(cursor.getString(0));
txt_pwd.setText(cursor.getString(1));
txt_explain.setText(cursor.getString(2));
}
else
{
//空
//清空界面
txt_id.setText("数据库空");
txt_pwd.setText("数据库空");
txt_explain.setText("数据库空");
}
}
@Override
public void onClick(View v)
{
//获取数据库
SQLiteDatabase db = mOpenHelper.getWritableDatabase();
// TODO Auto-generated method stub
switch (v.getId())
{
case R.id.button1:
{
//后退键
if (index > 0)
{
index--;
}
else
{
index = 0;
}
break;
}
case R.id.button2:
{
//前进键
index++;
break;
}
case R.id.button3:
{
//删除键
//获取当前ID,MIMA
String id_tmp = txt_id.getText().toString();
String pwd_tmp = txt_pwd.getText().toString();
//db.execSQL("DELETE * FROM MiMaTable WHERE ID = ?",new String[]{"jdh1"});
db.delete("MiMaTable","ID = ? AND PWD = ?",new String[]{id_tmp,pwd_tmp});
break;
}
case R.id.button4:
{
//新建键
//切换界面
Intent intent = new Intent(this,new_pwd.class);
startActivity(intent);
flag = true;
mimaxiang.this.finish();
break;
}
case R.id.button5:
{
//修改密码键
Intent intent = new Intent(this,edit_mima.class);
startActivity(intent);
flag = true;
mimaxiang.this.finish();
break;
}
case R.id.button6:
{
//退出键
flag = false;
mimaxiang.this.finish();
break;
}
default:
break;
}
//更新界面
Cursor cursor = db.rawQuery("SELECT * FROM MiMaTable",new String[]{});
//获得数据库数目
int count = cursor.getCount();
//判断数据库是否为空
if (count != 0)
{
//非空
//判断index是否越界
if (index > count - 1)
{
//越界
index = 0;
}
//更新界面
cursor.moveToPosition(index);
txt_id.setText(cursor.getString(0));
txt_pwd.setText(cursor.getString(1));
txt_explain.setText(cursor.getString(2));
}
else
{
//空
//清空界面
txt_id.setText("数据库空");
txt_pwd.setText("数据库空");
txt_explain.setText("数据库空");
}
}
@Override
protected void onDestroy()
{
super.onDestroy();
if (!flag)
{
android.os.Process.killProcess(android.os.Process.myPid());
}
}
}
修改密码界面源代码edit_mima.java:
package com.mimaxiang;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class edit_mima extends Activity implements View.OnClickListener
{
//全局变量定义
SharedPreferences mima_config;
SharedPreferences.Editor editor;
TextView txt_old_mima;
TextView txt_new_mima1;
TextView txt_new_mima2;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.edit_mima);
Button btn_ok = (Button)findViewById(R.id.button1);
btn_ok.setOnClickListener(this);
Button btn_quit = (Button)findViewById(R.id.button2);
btn_quit.setOnClickListener(this);
//获得配置文件
mima_config = getSharedPreferences("mima_config",0);
editor = mima_config.edit();
//写入配置：Id:10000 Name:Jdh
//editor.putString("MiMaMoRen", "1234");
//editor.commit();
//开辟控件空间
txt_old_mima = (TextView)findViewById(R.id.editText1);
txt_new_mima1 = (TextView)findViewById(R.id.editText2);
txt_new_mima2 = (TextView)findViewById(R.id.editText3);
}
@Override
public void onClick(View v)
{
// TODO Auto-generated method stub
switch (v.getId())
{
case R.id.button1:
{
//确认按键
String old_mima;
old_mima = txt_old_mima.getText().toString();
String new_mima1;
new_mima1 = txt_new_mima1.getText().toString();
String new_mima2;
new_mima2 = txt_new_mima2.getText().toString();
//读取配置
String mima = mima_config.getString("MiMa","1234");
//判断原密码是否正确
if (!mima.equalsIgnoreCase(old_mima))
{
//不正确
txt_old_mima.setText("原密码输入有误!");
break;
}
//判断新密码是否相同
if (!new_mima1.equalsIgnoreCase(new_mima2))
{
//不正确
txt_new_mima2.setText("新密码两次输入不同!");
break;
}
//修改密码
editor.putString("MiMa",new_mima1);
editor.commit();
//切换界面
Intent intent = new Intent(this,mimaxiang.class);
startActivity(intent);
edit_mima.this.finish();
break;
}
case R.id.button2:
{
//退出按键
//切换界面
Intent intent = new Intent(this,mimaxiang.class);
startActivity(intent);
edit_mima.this.finish();
break;
}
default:
break;
}
}
@Override
protected void onDestroy() {
super.onDestroy();
//android.os.Process.killProcess(android.os.Process.myPid());
}
}
新帐户密码记录界面源代码new_pwd.java:
package com.mimaxiang;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class new_pwd extends Activity implements View.OnClickListener
{
DatabaseHelper mOpenHelper;
private static final String DATABASE_NAME = "mimaxiang.db";
private static final int DATABASE_VERSION = 1;
TextView txt_id;
TextView txt_pwd;
TextView txt_explain;
private static class DatabaseHelper extends SQLiteOpenHelper
{
DatabaseHelper(Context context)
{
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db)
{
//新建一个用户表
//db.execSQL("CREATE TABLE MiMaTable ('ID' VARCHAR,'PWD' VARCHAR,'EXPLAIN' VARCHAR)");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)
{
}
}
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.new_pwd);
mOpenHelper = new DatabaseHelper(this);
Button btn_ok = (Button)findViewById(R.id.button1);
btn_ok.setOnClickListener(this);
Button btn_quit = (Button)findViewById(R.id.button2);
btn_quit.setOnClickListener(this);
//开辟控件空间
txt_id = (TextView)findViewById(R.id.editText1);
txt_pwd = (TextView)findViewById(R.id.editText2);
txt_explain = (TextView)findViewById(R.id.editText3);
}
@Override
public void onClick(View v)
{
//获取数据库
SQLiteDatabase db = mOpenHelper.getWritableDatabase();
// TODO Auto-generated method stub
switch (v.getId())
{
case R.id.button1:
{
//确认键
db.execSQL("INSERT INTO MiMaTable VALUES (?,?,?)", new Object[]{txt_id.getText().toString(),
txt_pwd.getText().toString(),txt_explain.getText().toString()});
//切换界面
Intent intent = new Intent(this,mimaxiang.class);
startActivity(intent);
new_pwd.this.finish();
break;
}
case R.id.button2:
{
//退出键
//切换界面
Intent intent = new Intent(this,mimaxiang.class);
startActivity(intent);
new_pwd.this.finish();
break;
}
default:
break;
}
}
@Override
protected void onDestroy() {
super.onDestroy();
//android.os.Process.killProcess(android.os.Process.myPid());
}
}