Android 作业09

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    tools:context="com.example.tongxunlu.MainActivity" >

    <LinearLayout
        android:layout_marginTop="100dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        >
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="用  户"
            android:layout_marginLeft="10dp"/>
        <EditText
            android:id="@+id/name"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="20dp"
            android:hint="请输入用户名称"/>
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:layout_marginTop="10dp"
        >
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="电  话"
            android:layout_marginLeft="10dp"/>
        <EditText
            android:id="@+id/phone"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="20dp"
            android:hint="请输入电话号码"/>
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="50dp"
        android:orientation="horizontal">

        <Button
            android:id="@+id/btn_add"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="#a76d6d"
            android:text="增加"
            android:layout_marginLeft="8dp"
            android:textColor="#ffffff" />

        <Button
            android:id="@+id/btn_updata"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="#a76d6d"
            android:text="修改"
            android:layout_marginLeft="6dp"
            android:textColor="#ffffff" />

        <Button
            android:id="@+id/btn_query"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="#a76d6d"
            android:text="查询"
            android:layout_marginLeft="6dp"
            android:textColor="#ffffff" />

        <Button
            android:id="@+id/btn_delete"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="#a76d6d"
            android:text="删除"
            android:layout_marginLeft="6dp"
            android:textColor="#ffffff" />
    </LinearLayout>

    <TextView
        android:id="@+id/tv"
        android:layout_marginTop="25dp"
        android:layout_marginLeft="25dp"
        android:layout_width="500dp"
        android:layout_height="wrap_content" />

</LinearLayout>

package com.example.tongxunlu;
import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.provider.BaseColumns;

class DbDataBase extends SQLiteOpenHelper implements BaseColumns{

    static String DB_NAME = "itcase.db";
    static int DB_VERSION = 1;
    static String TABLE_NAME = "mysql";
    static  String _NAME = "name";
    static String _PHONE= "phone";

    public DbDataBase(Context context) {
        super(context, DB_NAME, null, DB_VERSION);
        // TODO Auto-generated constructor stub
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        // TODO Auto-generated method stub
        db.execSQL("create table "+TABLE_NAME+"("+_ID+" integer primary key autoincrement,"+_NAME+" text ,"+_PHONE+" text)");

    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        // TODO Auto-generated method stub

    }

}

package com.example.tongxunlu;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;

class ContactDao {

    private static DbDataBase mDbDataBase;

    public ContactDao(Context c){
        mDbDataBase = new DbDataBase(c);
    }
    public static boolean Insert(String name ,String phone) {
        SQLiteDatabase db = mDbDataBase.getWritableDatabase();
        ContentValues values = new ContentValues();
        values.put(DbDataBase._NAME, name);
        values.put(DbDataBase._PHONE, phone);
        long InsertId = db.insert(DbDataBase.TABLE_NAME, null, values);
        return InsertId!=-1;
    }
    public static boolean Updata(String name,String phone) {
        SQLiteDatabase db = mDbDataBase.getWritableDatabase();
        ContentValues values = new ContentValues();
        values.put(DbDataBase._PHONE, phone);
        int Uqdata =db.update(DbDataBase.TABLE_NAME, values, DbDataBase._NAME+"=?",  new String[]{name});
        return Uqdata>0;
    }
    public static boolean Delete(String name) {
        SQLiteDatabase db = mDbDataBase.getWritableDatabase();
        int DeleteID =db.delete(DbDataBase.TABLE_NAME, DbDataBase._NAME+"=?", new String[]{name});
        return DeleteID>0;
    }
    public static String Select (String name) {
        SQLiteDatabase db=mDbDataBase.getReadableDatabase();
        Cursor cusor = null;
        String text ="";
        cusor = db.query(DbDataBase.TABLE_NAME, null, null, null, null, null, null);
        while (cusor.moveToNext()){
            int nameIntdex = cusor.getColumnIndex(DbDataBase._NAME);
            text+=("name: "+cusor.getString(nameIntdex)+"\n");
            int phoneIndex = cusor.getColumnIndex(DbDataBase._PHONE);
            text+=("phone: "+cusor.getString(phoneIndex)+"\n");
        }
        return text;

    }
}

package com.example.tongxunlu;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;


public class MainActivity extends Activity implements View.OnClickListener  {

    private ContactDao mContactDao;
    private Button mBtnadd;
    private Button mBtnupdata;
    private Button mBtnquery;
    private Button mBtndelete;
    private EditText mName;
    private EditText mPhone;
    private TextView mTv;
    private String name="";
    private String phone="";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mContactDao = new ContactDao(this);
        mName = (EditText) findViewById(R.id.name);
        mPhone = (EditText) findViewById(R.id.phone);
        mBtnadd =(Button) findViewById(R.id.btn_add);
        mTv = (TextView) findViewById(R.id.tv);
        mBtnupdata =(Button) findViewById(R.id.btn_updata);
        mBtnquery =(Button) findViewById(R.id.btn_query);
        mBtndelete =(Button) findViewById(R.id.btn_delete);
        mBtnadd.setOnClickListener(this);
        mBtnupdata.setOnClickListener(this);
        mBtnquery.setOnClickListener(this);
        mBtndelete.setOnClickListener(this);
        mTv.setText(mContactDao.Select(name));

    }
    @SuppressLint("WrongConstant")
    @Override
    public void onClick(View v) {
        name = mName.getText().toString();
        phone = mPhone.getText().toString();
        switch (v.getId()) {
            case R.id.btn_add:
                if(mContactDao.Insert(name, phone)){
                    Toast.makeText(this, "数据添加成功", 0).show();
                    mTv.setText(mContactDao.Select(name));
                }else {
                    Toast.makeText(this, "数据添加失败", 0).show();
                }

                break;
            case R.id.btn_query:
                mTv.setText(mContactDao.Select(name));
                break;
            case R.id.btn_delete:
                if(mContactDao.Delete(name)) {
                    Toast.makeText(this, "数据删除成功", 0).show();
                    mTv.setText(mContactDao.Select(name));
                }else {
                    Toast.makeText(this, "数据删除失败", 0).show();
                }
                break;
            case R.id.btn_updata:
                if(mContactDao.Updata(name, phone)) {
                    Toast.makeText(this, "数据修改成功", 0).show();
                    mTv.setText(mContactDao.Select(name));
                }else {
                    Toast.makeText(this, "数据修改失败", 0).show();
                }
                break;

        }
    }
}