我在android中使用activeandroid库的每个人都避免执行sql编码,但是由于某些原因它不起作用
这是我的代码:
这是我的清单:
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<application
android:name=".MyApplication"
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme">
<meta-data
android:name="AA_DB_Name"
android:value="knownFiles2.db"/>
<meta-data
android:name="AA_DB_Version"
android:value="5"/>
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
这是myapplication类
public class MyApplication extends Application {
@Override
public void onCreate() {
super.onCreate();
ActiveAndroid.initialize(this);
}
}
这是文件夹模型
@Table(name="Folders")
public class Folder extends Model implements Serializable{
@Column(name="Path")
public String path;
@Column(name = "ShowAllImages")
public String showAllImages;
Folder() {
super();
}
Folder(String path, String showAllImages) {
super();
this.path = path;
this.showAllImages = showAllImages;
}
@Override
public String toString() {
return "Path: "+path+
" ShowAllImages "+showAllImages;
}
}
这是服务器模型
@Table(name = "Servers")
public class Server extends Model implements Serializable{
@Column(name = "Ip")
String ip;
@Column(name = "Folder")
Folder folder;
Server() {
super();
}
Server(String ip, Folder folder) {
super();
this.ip = ip;
this.folder = folder;
}
@Override
public String toString() {
return "Ip: "+ip+" Folder: "+folder.toString();
}
public List<Server> getServer() {
return getMany(Server.class, "Ip");
}
}
这就是我想用的代码:
Folder folder = new Folder("private/secret/","show-all-images.php");
folder.save();
Server server = new Server("192.168.1.191",
folder);
server.save();
Log.v("MyTag",server.getId()+"");
Log.v("MyTag",server.toString());
Log.v("MyTag","Added");
ArrayList<Server> data = new Select()
.all()
.from(Server.class)
.execute();
Log.v("MyTag", data.size()+"");
for (Server serverLoop:data) {
Log.v("MyTag", serverLoop.toString());
}
日志应该返回数据库中的所有元素,但它没有返回,因为它说携带数据的arraylist的大小是0
这是日志:
04-09 22:59:30.824 27608-27608/com.example.mariomarhundabeltran.photokeeper v/mytag:5
04-09 22:59:30.824 27608-27608/com.example.mariomarhundabeltran.photokeeper v/mytag:IP:192.168.1.191文件夹:路径:private/secret/show all images show-all-images.php
04-09 22:59:30.824 27608-27608/com.example.mariomarhundabeltran.photokeeper v/mytag:已添加
04-09 22:59:30.824 27608-27608/com.example.mariomarhundabeltran.photokeeper v/mytag:0
如您所见,添加成功,但列表为空。5表示刚刚添加的元素是数据库中的第五个元素
救命啊!啊!
提前谢谢
最佳答案
你还需要在manifest中定义你的模型,
在清单中添加:
<meta-data
android:name="AA_DB_Name"
android:value="knownFiles2.db"/>
<meta-data
android:name="AA_DB_Version"
android:value="5"/>
<meta-data
android:name="AA_MODELS"
android:value=".YourModel1, .YourModel2" />
我希望这会有帮助。
你代码的其他部分在我看来很好
关于java - 使用 Activity Android在SQL上保存实际上没有保存,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/29549355/