团购app

项目简介：基于Android手机的一款团购类型的软件

1. 用户登录注册功能

通过用户输入的用户名和密码判断是否注册，或者用户名密码是否正确，从SharePreferences 里面的数据经行判断

2. 主界面展示

因为是团购类型的app，所以主要是界面的展示，因此使用了大量

的控件，例如tab的切换，ViewPager的左右滑动  

3. 搜索功能

    根据用户输入的关键字，匹配相关信息，然后显示到界面

责任描述：主要负责界面的显示

 

这里界面使用的是ViewPager，ListView等的嵌套，不做多加描述，我认为技术难点在登录界面的逻辑判断

 

package com.scxh.android.sqllite;

import com.scxh.android.Bean.User;
import com.scxh.android.preference.SharedPreferencesHelper;
import com.scxh.android.ui.test.MeiTuanActivity;
import com.scxh.myproject.R;

import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class LoginDataSavaDB extends Activity {
	private Button mButton;
	private TextView mTextView;
	private EditText mUserName, mPassWord;
	private SQLiteDatabase db;
	private CheckBox mCheckBox;
	private SharedPreferencesHelper mSharedPreferencesHelper;

	@Override
	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		setContentView(R.layout.activity_register);

		DataBaseHelper dataBaseHelper = DataBaseHelper
				.getInstanceOfDataBaseHelper(this);
		db = dataBaseHelper.getReadableDatabase();

		mTextView = (TextView) findViewById(R.id.meituan_register_mianfeizhuce);
		mButton = (Button) findViewById(R.id.meituan_register_btn);

		mUserName = (EditText) findViewById(R.id.meituan_register_user);
		mPassWord = (EditText) findViewById(R.id.meituan_register_password);

		mCheckBox = (CheckBox) findViewById(R.id.remenber_password);

		mSharedPreferencesHelper = SharedPreferencesHelper
				.getInstancePreferencesHelper(this);

		User user = mSharedPreferencesHelper.getUserFromPreferences();
		if (user.getCheckbox()) {
			mUserName.setText(user.getName());
			mPassWord.setText(user.getPassWord());
			mCheckBox.setChecked(true);
		}

		mTextView.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				Intent intent = new Intent(LoginDataSavaDB.this,
						RegisterDataSavaDB.class);
				startActivity(intent);

			}
		});
		mButton.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				String username = mUserName.getText().toString();
				String password = mPassWord.getText().toString();
				if (username.equals("") || password.equals("")) {
					Toast.makeText(LoginDataSavaDB.this, "用户名或密码不能为空",
							Toast.LENGTH_SHORT).show();
				} else {
					Cursor cursor = db.query("user", new String[] { "username",
							"password" }, "username = ? and password=?",
							new String[] { username, password }, null, null,
							null, null);

					if (cursor.getCount() == 0) {
						Toast.makeText(LoginDataSavaDB.this, "用户名或密码输入错误",
								Toast.LENGTH_SHORT).show();
					} else {
						startActivity(new Intent(LoginDataSavaDB.this,
								MeiTuanActivity.class));
					}
				}
				if (mCheckBox.isChecked()) {
					User user = new User();
					user.setName(username);
					user.setPassWord(password);
					user.setCheckbox(true);
					mSharedPreferencesHelper.saveUserToPreferences(user);
				} else {
					User user = new User();
					user.setName(username);
					user.setPassWord(password);
					user.setCheckbox(false);
					mSharedPreferencesHelper.saveUserToPreferences(user);
				}

			}
		});
	}
}