android 数据库orm 添加、删除操作 实例源码

【实例截图】

【核心代码】

package com.wh.activeandroiddemo2.activity;

import java.util.ArrayList;
import java.util.List;
import com.activeandroid.query.Select;
import com.wh.activeandroiddemo2.R;
import com.wh.activeandroiddemo2.adapter.StuAdapter;
import com.wh.activeandroiddemo2.entry.Student;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ListView;
import android.app.Activity;


public class MainActivity extends Activity {

	private Button add_btn;
	private ListView lv;
	List<Student> sList = new ArrayList<Student>();
	private StuAdapter stuAdapter;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		initView();

	}

	/**
	 * 初始化视图
	 */
	private void initView() {
		add_btn = (Button) findViewById(R.id.add_btn);
		lv = (ListView) findViewById(R.id.lv);
		stuAdapter = new StuAdapter(this, sList);
		lv.setAdapter(stuAdapter);
		List<Student> stuList = new Select().from(Student.class).execute();
		for (int i = 0; i < stuList.size(); i  ) {
			Student stu = stuList.get(i);
			stu.name = "zhangsan";
			stu.save();
		}
		sList.addAll(stuList);

		for (int i = 0; i < 4; i  ) {

			Student student2 = new Student();
			student2.name = "lisi"   i;
			student2.age = 10   i;
			student2.save();
			sList.add(student2);
		}

		stuAdapter.notifyDataSetChanged();
		add_btn.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				Student student3 = new Student();
				student3.name = "wangwu";
				student3.age = 25;
				student3.save();
				sList.add(student3);
				stuAdapter.notifyDataSetChanged();
			}
		});
	}

}