Android中SQLiteDatabase的使用

链接http://aina-hk55hk.iteye.com/blog/698794
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
Java代码
<?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> 

<?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
Java代码
<?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="" />