Android SQLiteDatabase 的使用

package com.Aina.Android;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.ContentValues;
import android.content.DialogInterface;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;

public class Test extends Activity {
	/** Called when the activity is first created. */
	private ListView lv = null;
	private SQLiteDatabase mSQLiteDatabase = null;
	private static final String DATABASE_NAME = "Test.db";
	private static final String TABLE_NAME = "table_test";
	private static final String COLUMN_ID = "_id";// INTEGER PRIMARY KEY
	private static final String COLUMN_NAME = "name";// TEXT
	private static final String COLUMN_AGE = "age";// INTEGER
	private static final String CREATE_TABLE = "CREATE TABLE IF NOT EXISTS "
			+ TABLE_NAME + " (" + COLUMN_ID + " INTEGER PRIMARY KEY,"
			+ COLUMN_NAME + " TEXT," + COLUMN_AGE + " INTEGER)";

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		lv = (ListView) this.findViewById(R.id.ListView01);
		try {
			mSQLiteDatabase = this.openOrCreateDatabase(DATABASE_NAME,
					Activity.MODE_PRIVATE, null);
		} catch (Exception ex) {
			this.ShowDialog("打开或者创建数据库异常:" + ex.getMessage());
		}
		try {
			mSQLiteDatabase.execSQL(CREATE_TABLE);
		} catch (Exception ex) {
			this.ShowDialog("创建表异常:" + ex.getMessage());
		}
		// this.InsertData();
		// this.InsertData2();
		// this.AddData();
		// this.UpdateData();
		// this.UpdateData2();
		// this.UpdateData3();
		// this.DeleteData();
		// this.DeleteData2();
		// this.DeleteData3();
		this.SelectData();
	}

	@Override
	protected void onPause() {		
		super.onPause();
		mSQLiteDatabase.close();// 关闭数据库
	}

	/**
	 * 插入数据-execSQL
	 */
	private void InsertData() {
		try {
			String str = "INSERT INTO " + TABLE_NAME + " (" + COLUMN_NAME + ","
					+ COLUMN_AGE + ")VALUES('张三',30)";
			mSQLiteDatabase.execSQL(str);
		} catch (Exception ex) {
			this.ShowDialog("插入数据异常:" + ex.getMessage());
		}

	}

	/**
	 * 插入数据-execSQL
	 */
	private void InsertData2() {
		try {
			String str = "INSERT INTO " + TABLE_NAME + " (" + COLUMN_NAME + ","
					+ COLUMN_AGE + ")VALUES(?,?)";
			Object[] ob = new Object[] { "王五", 50 };
			mSQLiteDatabase.execSQL(str, ob);
		} catch (Exception ex) {
			this.ShowDialog("插入数据异常:" + ex.getMessage());
		}
	}

	/**
	 * 插入数据-insert() nullColumnHack，这个参数需要传入一个列名。SQL标准并不允许插入所有列均为空的一行数据，
	 * 所以当传入的initialValues值为空或者为0时
	 * ，用nullColumnHack参数指定的列会被插入值为NULL的数据，然后再将此行插入到表中。
	 */
	private void AddData() {
		try {
			ContentValues cv = new ContentValues();
			cv.put(COLUMN_NAME, "李四");
			cv.put(COLUMN_AGE, 40);
			// long num = mSQLiteDatabase.insert(TABLE_NAME, COLUMN_NAME, cv);
			long num = mSQLiteDatabase.insertOrThrow(TABLE_NAME, null, cv);
			this.setTitle("num==" + num);
		} catch (Exception ex) {
			this.ShowDialog("插入数据异常:" + ex.getMessage());
		}

	}

	/**
	 * 更新数据
	 */
	private void UpdateData() {
		try {
			String str = "UPDATE " + TABLE_NAME + " SET " + COLUMN_AGE
					+ " = 25 WHERE _id=1";
			mSQLiteDatabase.execSQL(str);
		} catch (Exception ex) {
			this.ShowDialog("更新数据异常:" + ex.getMessage());
		}
	}

	/**
	 * 更新数据
	 */
	private void UpdateData2() {
		try {
			String str = "UPDATE " + TABLE_NAME + " SET " + COLUMN_AGE
					+ " = ? WHERE _id=?";
			Object[] Ob = new Object[] { 33, 2 };
			mSQLiteDatabase.execSQL(str, Ob);
		} catch (Exception ex) {
			this.ShowDialog("更新数据异常:" + ex.getMessage());
		}
	}

	/**
	 * 更新数据
	 */
	private void UpdateData3() {
		try {
			ContentValues cv = new ContentValues();
			cv.put(COLUMN_NAME, "李四4");
			cv.put(COLUMN_AGE, 43);
			int num = mSQLiteDatabase.update(TABLE_NAME, cv,
					COLUMN_NAME + "=?", new String[] { "李四" });
			this.setTitle("修改行数num=" + num);
		} catch (Exception ex) {
			this.ShowDialog("更新数据异常:" + ex.getMessage());
		}
	}

	/**
	 * 删除数据
	 */
	private void DeleteData() {
		try {
			String str = "DELETE FROM " + TABLE_NAME + " WHERE _id=3";
			mSQLiteDatabase.execSQL(str);
		} catch (Exception ex) {
			this.ShowDialog("删除数据异常:" + ex.getMessage());
		}
	}

	/**
	 * 删除数据
	 */
	private void DeleteData2() {
		try {
			String str = "DELETE FROM " + TABLE_NAME + " WHERE _id=?";
			mSQLiteDatabase.execSQL(str, new Object[] { 2 });
		} catch (Exception ex) {
			this.ShowDialog("删除数据异常:" + ex.getMessage());
		}
	}

	/**
	 * 删除数据
	 */
	private void DeleteData3() {
		try {
			int num = mSQLiteDatabase.delete(TABLE_NAME, "_id=1", null);
			this.setTitle("删除行数num=" + num);
		} catch (Exception ex) {
			this.ShowDialog("删除数据异常:" + ex.getMessage());
		}
	}

	/**
	 * 查询数据
	 */
	private void SelectData() {
		try {
			String sql = "SELECT * FROM " + TABLE_NAME;
			Cursor cursor = mSQLiteDatabase.rawQuery(sql,null);
			// Cursor cursor = mSQLiteDatabase.query(TABLE_NAME, new String[] {
			// COLUMN_ID, COLUMN_NAME, COLUMN_AGE }, COLUMN_NAME + "=?",
			// new String[] { "李四" }, null, null, null);
			if (cursor != null) {
				ListAdapter adapter = new SimpleCursorAdapter(this,
						R.layout.ss, cursor, new String[] { COLUMN_ID,
								COLUMN_NAME, COLUMN_AGE },
						new int[] { R.id.TextView1, R.id.TextView2,
								R.id.TextView3 });
				lv.setAdapter(adapter);
			}
		} catch (Exception ex) {
			this.ShowDialog("查询数据异常:" + ex.getMessage());
		}
	}
	/**
	 * 删除表
	 */
	private void DropTable(){
		try{
			String sql = "DROP TABLE "+TABLE_NAME;
			mSQLiteDatabase.execSQL(sql);
		}catch(Exception ex){
			this.ShowDialog("删除表异常:"+ex.getMessage());
		}
	}
	/**
	 * 删除数据库
	 */
	private void DropDatabase(){		
		try{
			this.deleteDatabase(DATABASE_NAME);
		}catch(Exception ex){
			this.ShowDialog("删除数据库异常:"+ex.getMessage());
		}
	}
	/**
	 * 提示对话框
	 * @param msg
	 */
	private void ShowDialog(String msg) {
		new AlertDialog.Builder(this).setTitle("提示").setMessage(msg)
				.setPositiveButton("OK", new DialogInterface.OnClickListener() {

					@Override
					public void onClick(DialogInterface dialog, int which) {

					}

				}).show();
	}
}

2.main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="vertical" android:layout_width="fill_parent"
	android:layout_height="fill_parent">
	<TextView android:layout_width="fill_parent"
		android:layout_height="wrap_content" android:text="@string/hello" />
	<ListView android:id="@+id/ListView01" android:layout_width="fill_parent"
		android:layout_height="wrap_content"></ListView>
</LinearLayout>

3.ss.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="horizontal" android:layout_width="fill_parent"
	android:paddingTop="5dip" android:paddingBottom="5dip" android:paddingLeft="5dip"
	android:layout_height="wrap_content">
	<TextView android:id="@+id/TextView1" android:layout_width="wrap_content"
		android:layout_height="wrap_content"		
		android:text="" />
	<TextView android:id="@+id/TextView2" android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:textSize="20px" android:layout_marginLeft="50dip" android:paddingRight="50dip"
		android:text="" />
	<TextView android:id="@+id/TextView3" android:layout_width="wrap_content"
		android:layout_height="wrap_content"
		android:text="" />
</LinearLayout>