Android 在模拟器上显示数据库中提取的信息的列表

核心提示：Cursor cursor = db.rawQuery("select count(*) from person", null);// 没有占位符参数的话，直接用nullcursor.moveToFirst();Long count = cursor.getLong(0);cursor.close(

Cursor cursor = db.rawQuery("select count(*) from person", null);

// 没有占位符参数的话，直接用null

cursor.moveToFirst();

Long count = cursor.getLong(0);

cursor.close();

return count;

}

}

实体类传递数据：Person.java

package com.gohighsoft.db;

public class Person {

private Integer id;

private String name;

private Integer age;

public Person() {

};

public Person(String name, Integer age) {

this.name = name;

this.age = age;

}

public Integer getId(){

return id;

}

public void setId(Integer id) {

this.id = id;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public Integer getAge() {

return age;

}

public void setAge(Integer age) {

this.age = age;

}

public String toString() {

return "Person [age=" + age + ",id=" + id + ",name" + name + "]";

}

}

最后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">

< ListView android:id="@+id/personList" android:layout_width="fill_parent"

android:layout_height="wrap_content" />

< /LinearLayout>

好了到此为止算是完成了，直接运行MainActivity.java就可以了

看不懂的自己上网去查去，不再详细的解释了.