package cn.lixyz.sqlite;

import android.app.Activity;

import android.content.ContentValues;

import android.content.Context;

import android.database.Cursor;

import android.database.sqlite.SQLiteDatabase;

import android.database.sqlite.SQLiteDatabase.CursorFactory;

import android.database.sqlite.SQLiteOpenHelper;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import android.widget.Button;

import android.widget.EditText;

import android.widget.Toast;

public class MainActivity extends Activity {

    private EditText name, age, paramter, originalAge, newAge;

    private Button insertButton, selectButton, paramterSelect, updateButton;

    private SQLiteDatabase database;

    private MySQLiteOpenHelper msop;

    public String inputSex;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        findView();

        msop = new MySQLiteOpenHelper(this, "user.db", null, 1);

        database = msop.getReadableDatabase();

    }

    private void findView() {

        name = (EditText) findViewById(R.id.name);

        age = (EditText) findViewById(R.id.age);

        insertButton = (Button) findViewById(R.id.insertButton);

        selectButton = (Button) findViewById(R.id.selectButton);

        paramter = (EditText) findViewById(R.id.paramter);

        paramterSelect = (Button) findViewById(R.id.paramterSelect);

        originalAge = (EditText) findViewById(R.id.originalAge);

        newAge = (EditText) findViewById(R.id.newAge);

        updateButton = (Button) findViewById(R.id.updateButton);

    }

    public void clickButton(View view) {

        switch (view.getId()) {

        case R.id.selectButton:

            selectData();

            break;

        case R.id.insertButton:

            insertData();

            break;

        case R.id.paramterSelect:

            paramterSelect();

            break;

        case R.id.updateButton:

            updateData();

            break;

        }

    }

    private void updateData() {

        String oldAge = originalAge.getText().toString();

        String updateAge = newAge.getText().toString();

        ContentValues cv = new ContentValues();

        cv.put("age", updateAge);

        String whereColumn = "age=?";// 修改条件

        String[] whereArgs = { oldAge };

        int i = database.update("user", cv, whereColumn, whereArgs);

        if (1 > 0) {

            Toast.makeText(MainActivity.this, "更新成功", Toast.LENGTH_SHORT).show();

        } else {

            Toast.makeText(MainActivity.this, "更新不成功", Toast.LENGTH_SHORT).show();

        }

    }

    private void paramterSelect() {

        String inputAge = paramter.getText().toString();

        Cursor c = database.rawQuery("select * from user where age>?", new String[] { inputAge });

        if (c.moveToFirst()) {

            do {

                int id = c.getInt(c.getColumnIndex("id"));

                String name = c.getString(c.getColumnIndex("name"));

                String age = c.getString(c.getColumnIndex("age"));

                Log.d("TTTT", "id=" + id + ",name=" + name + ",age=" + age);

            } while (c.moveToNext());

        }

        c.close();

    }

    private void insertData() {

        String inputAge = age.getText().toString();

        String inputName = name.getText().toString();

        ContentValues cv = new ContentValues();

        cv.put("name", inputName);

        cv.put("age", inputAge);

        database.insert("user", null, cv);

        Toast.makeText(MainActivity.this, "插入成功", Toast.LENGTH_SHORT).show();

        age.setText("");

        name.setText("");

    }

    private void selectData() {

        Cursor c = database.query("user", null, null, null, null, null, null);

        if (c.moveToFirst()) {

            do {

                int id = c.getInt(c.getColumnIndex("id"));

                String name = c.getString(c.getColumnIndex("name"));

                String age = c.getString(c.getColumnIndex("age"));

                Log.d("TTTT", "id=" + id + ",姓名=" + name + ",年龄=" + age);

            } while (c.moveToNext());

        }

        c.close();

    }

    class MySQLiteOpenHelper extends SQLiteOpenHelper {

        private static final String CREATE_USER = "create table user(id integer primary key autoincrement,name text,age text)";

        private Context mContext;

        public MySQLiteOpenHelper(Context context, String name, CursorFactory factory, int version) {

            super(context, name, factory, version);

            mContext = context;

        }

        @Override

        public void onCreate(SQLiteDatabase db) {

            db.execSQL(CREATE_USER);

        }

        @Override

        public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

            // TODO Auto-generated method stub

        }

    }

}

<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:orientation="vertical"

    tools:context=".MainActivity" >

    <EditText

        android:id="@+id/name"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:hint="输入姓名" />

    <EditText

        android:id="@+id/age"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:hint="输入年龄" />

    <Button

        android:id="@+id/insertButton"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:onClick="clickButton"

        android:text="点击插入" />

    <Button

        android:id="@+id/selectButton"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:onClick="clickButton"

        android:text="点击查询" />

    <TextView

        android:id="@+id/text"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="条件搜索" />

    <EditText

        android:id="@+id/paramter"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:hint="您要搜多少岁以上的？" />

    <Button

        android:id="@+id/paramterSelect"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:onClick="clickButton"

        android:text="点击搜索" />

    <TextView

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="update" />

    <LinearLayout

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:orientation="horizontal" >

        <EditText

            android:id="@+id/originalAge"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:hint="要修改的年龄" />

        <TextView

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="修改为" />

        <EditText

            android:id="@+id/newAge"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:hint="新年龄" />

    </LinearLayout>

    <Button

        android:id="@+id/updateButton"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:onClick="clickButton"

        android:text="UPDATE" />

</LinearLayout>