我遇到了active-android的问题。
我试图获取用户位置,乘客数量和总体方向。
我想将这些保存到名为" Splits"的表中的手机存储器中。使用activeAndroid。
但每当我调用save()
方法时,我都会得到一长串错误。
我试图重新安装应用程序,并在清单中更改我的数据库名称,但这些解决方案都不起作用。
请记住,我对编程非常陌生,所以如果可能的话,请像我一样5.谢谢:)
这是LogCat输出
11-03 23:27:51.094 2905-2905/dk.specialisering.splitcab E/SQLiteLog﹕ (1) no such table: Splits
11-03 23:27:51.115 2905-2905/dk.specialisering.splitcab E/SQLiteDatabase﹕ Error inserting passengers=1 Id=null startLong=9.92773733 direction=North startLat=57.0487396
android.database.sqlite.SQLiteException: no such table: Splits (code 1): , while compiling: INSERT INTO Splits(passengers,Id,startLong,direction,startLat) VALUES (?,?,?,?,?)
at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:1118)
at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:691)
at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1589)
at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1461)
at com.activeandroid.Model.save(Model.java:153)
at dk.specialisering.splitcab.MainActivity.save(MainActivity.java:127)
at dk.specialisering.splitcab.MainActivity$1.onClick(MainActivity.java:37)
at android.view.View.performClick(View.java:4475)
at android.view.View$PerformClick.run(View.java:18786)
at android.os.Handler.handleCallback(Handler.java:730)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5419)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1187)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)
at dalvik.system.NativeStart.main(Native Method)
11-03 23:27:51.175 2905-2905/dk.specialisering.splitcab E/SQLiteLog﹕ (1) no such table: Splits
11-03 23:27:51.175 2905-2905/dk.specialisering.splitcab E/SQLiteDatabase﹕ Error inserting passengers=1 Id=null startLong=9.92773733 direction=North startLat=57.0487396
android.database.sqlite.SQLiteException: no such table: Splits (code 1): , while compiling: INSERT INTO Splits(passengers,Id,startLong,direction,startLat) VALUES (?,?,?,?,?)
at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:1118)
at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:691)
at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1589)
at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1461)
at com.activeandroid.Model.save(Model.java:153)
at dk.specialisering.splitcab.MainActivity.save(MainActivity.java:127)
at dk.specialisering.splitcab.MainActivity$1.onClick(MainActivity.java:37)
at android.view.View.performClick(View.java:4475)
at android.view.View$PerformClick.run(View.java:18786)
at android.os.Handler.handleCallback(Handler.java:730)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5419)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1187)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)
at dalvik.system.NativeStart.main(Native Method)
这是我的表
的Model类@Table(name = "Splits")
public class Splits extends Model {
@Column(name = "startLat")
public double startLat;
@Column(name = "startLong")
public double startLong;
@Column(name = "passengers")
public int passengers;
@Column(name = "direction")
public String direction;
public Splits()
{
super();
}
public Splits(double startLat, double startLong, int passengers, String direction)
{
this.startLat = startLat;
this.startLong = startLong;
this.passengers = passengers;
this.direction = direction;
}
}
我的活动
package dk.specialisering.splitcab;
import android.app.Activity;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.media.Image;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ImageButton;
import android.widget.Spinner;
import android.widget.TextView;
import com.activeandroid.ActiveAndroid;
import dk.specialiserng.model.Splits;
public class MainActivity extends Activity {
TextView textLat;
TextView textLong;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final ImageButton btn = (ImageButton)findViewById(R.id.imgBtn);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
save();
}
});
ActiveAndroid.initialize(this);
populateSpinners();
initializeLocation();
}
private class myLocationListener implements LocationListener{
@Override
public void onLocationChanged(Location location) {
if(location != null) {
double pLong = location.getLongitude();
double pLat = location.getLatitude();
textLat.setText(Double.toString(pLat));
textLong.setText((Double.toString(pLong)));
}
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
}
public void populateSpinners()
{
Spinner passengerSpinner = (Spinner) findViewById(R.id.ddlPassengers);
Spinner directionSpinner = (Spinner) findViewById(R.id.ddlDirection);
// Create an ArrayAdapter using the string array and a default spinner layout
ArrayAdapter<CharSequence> passengerAdapter = ArrayAdapter.createFromResource(this,
R.array.noOfPassengers, android.R.layout.simple_spinner_item);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
R.array.splitDirection, android.R.layout.simple_spinner_item);
// Specify the layout to use when the list of choices appears
passengerAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// Apply the adapter to the spinner
passengerSpinner.setAdapter(passengerAdapter);
directionSpinner.setAdapter(adapter);
}
public void initializeLocation()
{
textLat = (TextView) findViewById(R.id.textLat);
textLong = (TextView) findViewById(R.id.textLong);
LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
LocationListener ll = new myLocationListener();
Location lastLocation = lm.getLastKnownLocation(LocationManager.GPS_PROVIDER);
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, ll);
if (lastLocation != null)
{
textLat.setText(Double.toString(lastLocation.getLatitude()));
textLong.setText(Double.toString(lastLocation.getLongitude()));
}
}
public void save()
{
Spinner pasSpin = (Spinner)findViewById(R.id.ddlPassengers);
Spinner dirSpin = (Spinner)findViewById(R.id.ddlDirection);
double latitude = Double.parseDouble(textLat.getText().toString());
double longitude = Double.parseDouble(textLong.getText().toString());
int passengers = Integer.parseInt(pasSpin.getSelectedItem().toString());
String direction = dirSpin.getSelectedItem().toString();
Splits splits = new Splits(latitude, longitude, passengers, direction);
splits.save();
}
}
我的布局
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="Your Position in latitude and longitude"
android:id="@+id/textView"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:id="@+id/textLat"
android:layout_below="@+id/textView"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignRight="@+id/textView"
android:layout_alignEnd="@+id/textView" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:id="@+id/textLong"
android:layout_below="@+id/textLat"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignRight="@+id/textLat"
android:layout_alignEnd="@+id/textLat" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="Number of Splitters in your party"
android:id="@+id/textView2"
android:layout_below="@+id/textLong"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />
<Spinner
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/ddlPassengers"
android:layout_below="@+id/textView2"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:spinnerMode="dropdown" />
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="The direction you will be going"
android:id="@+id/textView3"
android:layout_below="@+id/ddlPassengers"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<Spinner
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/ddlDirection"
android:layout_below="@+id/textView3"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:spinnerMode="dropdown" />
<ImageButton
android:layout_width="200dp"
android:layout_height="90dp"
android:scaleType="fitCenter"
android:id="@+id/imgBtn"
android:src="@drawable/gotitbtn"
android:background="@android:color/transparent"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
/>
</RelativeLayout>
我希望有人能提供帮助,我知道我发了一堆,但我现在已经绝望了。 提前致谢
答案 0 :(得分:16)
虽然很晚,但希望能有所帮助。
来自github中的ActiveAndroid官方页面:
&#34;这是因为如果没有现有数据库文件,ActiveAndroid 仅生成架构。为了'再生&#34;创建新模型后的架构,最简单的方法是从模拟器中卸载应用程序并允许它完全重新安装。这是因为这会清除数据库文件并触发ActiveAndroid根据项目中带注释的模型重新创建表。&#34;
答案 1 :(得分:9)
在清单中增加AA_DB_VERSION。这将迫使ActiveAndroid重新生成您的架构。
答案 2 :(得分:1)
似乎你忘记在构造函数中调用模型类中的super():
public Splits(double startLat, double startLong, int passengers, String direction)
{
super();
this.startLat = startLat;
this.startLong = startLong;
this.passengers = passengers;
this.direction = direction;
}
另一种可能性是你没有在你的清单文件中声明你的Model类。
答案 3 :(得分:0)
似乎没有名为Splits的表进入您的数据库。如果您对数据库进行了更改,并且在一个真实设备(而非仿真器)中测试应用程序,则需要从设备中删除应用程序(或至少从其数据中删除)以刷新数据库。希望它有帮助=)
答案 4 :(得分:0)
您可能错误配置了ActiveAndroid。在“常见问题”部分中查看此tutorial。
答案 5 :(得分:0)
此初始化代码:
ActiveAndroid.initialize(this);
进入Application类。所以你可以扩展Application类并在OnCreate中使用初始化。 像
public class MyApplication extends Application{
@Override
public void onCreate() {
super.onCreate();
ActiveAndroid.initialize(this);
}
}
确保您在AndroidManifest.xml中使用此应用程序类作为您的应用程序。即,
<application android:name="com.exampleapp.MyApplication" ...>
参考:https://github.com/pardom/ActiveAndroid/wiki/Getting-started