在main.xml中：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:gravity="center_horizontal">
<Button
android:id="@+id/insertBut"
android:layout_marginTop="8dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="增加数据" />
<Button
android:id="@+id/updateBut"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="修改数据" />
<Button
android:id="@+id/deleteBut"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="删除数据" />
</LinearLayout>
创建数据库的建表操作类Mytab.java
package com.li.sqlite;
import android.database.sqlite.SQLiteDatabase;
public class Mytab {
private static final String TABLENAME = "mytab"; // 表示要操作的数据表名称
private SQLiteDatabase db = null; // 数据库操作
public Mytab(SQLiteDatabase db) {
this.db = db;
}
public void insert(String name,String birthday) { //向表中增加数据
String sql = "INSERT INTO " + TABLENAME + "(name,birthday) VALUES (?,?)";
Object args[] = new Object[]{name,birthday};
this.db.execSQL(sql,args) ;
this.db.close() ;
}
public void update(int id, String name, String birthday) { //修改表的数据
String sql = "UPDATE " + TABLENAME + " SET name=?,birthday=? WHERE id=?";
Object args[] = new Object[]{name,birthday,id};
this.db.execSQL(sql,args);
this.db.close() ;
}
public void delete(int id) { //删除表的数据
String sql = "DELETE FROM " + TABLENAME + " WHERE id=?";
Object args[] = new Object[]{id};
this.db.execSQL(sql,args) ;
this.db.close() ;
}
}
在MySQLiteDemo.java中：
package com.li.sqlite;
import android.app.Activity;
import android.database.sqlite.SQLiteOpenHelper;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MySQLiteDemo extends Activity {
private Button inserBut = null;
private Button updateBut = null;
private Button deleteBut = null;
private SQLiteOpenHelper helper = null;
private Mytab mtab = null;
private static int count = 0;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
super.setContentView(R.layout.main);
this.inserBut = (Button)super.findViewById(R.id.insertBut);
this.updateBut = (Button)super.findViewById(R.id.updateBut);
this.deleteBut = (Button)super.findViewById(R.id.deleteBut);
this.helper = new MyDatabaseHelper(this);
this.inserBut.setOnClickListener(new InertOnClickListenerImpl());
this.updateBut.setOnClickListener(new UpdateOnClickListenerImpl());
this.deleteBut.setOnClickListener(new DeleteOnClickListenerImpl());
}
private class InertOnClickListenerImpl implements OnClickListener{
public void onClick(View v) {
MySQLiteDemo.this.mtab = new Mytab(
MySQLiteDemo.this.helper.getWritableDatabase());
MySQLiteDemo.this.mtab.insert("liyewen" + count++, "1988-08-16");
}
}
private class UpdateOnClickListenerImpl implements OnClickListener{
public void onClick(View v) {
MySQLiteDemo.this.mtab = new Mytab(
MySQLiteDemo.this.helper.getWritableDatabase());
MySQLiteDemo.this.mtab.update(30, "update", "1988/8/15");
}
}
private class DeleteOnClickListenerImpl implements OnClickListener{
public void onClick(View v) {
MySQLiteDemo.this.mtab = new Mytab(
MySQLiteDemo.this.helper.getWritableDatabase());
MySQLiteDemo.this.mtab.delete(31);
}
}
}