[英]how to populate sqlite values into spinner
我無法從數據庫檢索數據到微調器。 這是無法帶來微調器的源代碼。 我一直在做方法並從數據庫中檢索它,但是數據庫中的數據也沒有顯示出來。 請幫忙 ..
private void loadModuledate(){
DBDataSource db = new DBDataSource(getApplicationContext());
ArrayList<ProductModule> lables = db.getAllmodule();
// Creating adapter for spinner
ArrayAdapter<ProductModule> dataAdapter = new ArrayAdapter<ProductModule>(this,
android.R.layout.simple_spinner_item, lables);
// Drop down layout style - list view with radio button
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// attaching data adapter to spinner
edModul.setAdapter(dataAdapter);
}
這是我的DBDatasource.java
public ArrayList<ProductModule> getAllmodule() {
ArrayList<ProductModule> daftarproductmodule = new ArrayList<ProductModule>();
Cursor cursor = database.query(DBHelper.PRODUCT_MODULE,
allProductModule, null, null, null, null, null);
cursor.moveToFirst();
while (!cursor.isAfterLast()) {
ProductModule ProductModule = cursorToProductModule(cursor);
daftarproductmodule.add(ProductModule);
cursor.moveToNext();
}
cursor.close();
return daftarproductmodule;
}
這是我的原木貓
02-24 14:57:07.445: E/AndroidRuntime(16981): FATAL EXCEPTION: main
02-24 14:57:07.445: E/AndroidRuntime(16981): java.lang.RuntimeException: Unable to start activity ComponentInfo{ims.app.mobileorder/ims.app.mobileorder.FormComplain}: java.lang.NullPointerException
02-24 14:57:07.445: E/AndroidRuntime(16981): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2062)
02-24 14:57:07.445: E/AndroidRuntime(16981): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2087)
02-24 14:57:07.445: E/AndroidRuntime(16981): at android.app.ActivityThread.access$600(ActivityThread.java:133)
02-24 14:57:07.445: E/AndroidRuntime(16981): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1198)
02-24 14:57:07.445: E/AndroidRuntime(16981): at android.os.Handler.dispatchMessage(Handler.java:99)
02-24 14:57:07.445: E/AndroidRuntime(16981): at android.os.Looper.loop(Looper.java:137)
02-24 14:57:07.445: E/AndroidRuntime(16981): at android.app.ActivityThread.main(ActivityThread.java:4803)
02-24 14:57:07.445: E/AndroidRuntime(16981): at java.lang.reflect.Method.invokeNative(Native Method)
02-24 14:57:07.445: E/AndroidRuntime(16981): at java.lang.reflect.Method.invoke(Method.java:511)
02-24 14:57:07.445: E/AndroidRuntime(16981): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
02-24 14:57:07.445: E/AndroidRuntime(16981): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
02-24 14:57:07.445: E/AndroidRuntime(16981): at dalvik.system.NativeStart.main(Native Method)
02-24 14:57:07.445: E/AndroidRuntime(16981): Caused by: java.lang.NullPointerException
02-24 14:57:07.445: E/AndroidRuntime(16981): at ims.app.mobileorder.DBDataSource.getAllmodule(DBDataSource.java:101)
02-24 14:57:07.445: E/AndroidRuntime(16981): at ims.app.mobileorder.FormComplain.loadModuledate(FormComplain.java:63)
02-24 14:57:07.445: E/AndroidRuntime(16981): at ims.app.mobileorder.FormComplain.onCreate(FormComplain.java:46)
02-24 14:57:07.445: E/AndroidRuntime(16981): at android.app.Activity.performCreate(Activity.java:5008)
02-24 14:57:07.445: E/AndroidRuntime(16981): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
02-24 14:57:07.445: E/AndroidRuntime(16981): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2026)
02-24 14:57:07.445: E/AndroidRuntime(16981): ... 11 more
02-24 14:57:10.698: E/Trace(17357): error opening trace file: No such file or directory (2)
public ArrayList<ProductModule> getAllmodule() {
SQLiteDataBase sqLiteDatabase = dbHelper.openDataBase();
ArrayList<ProductModule> daftarproductmodule = new ArrayList<ProductModule>();
Cursor cursor = database.query(DBHelper.PRODUCT_MODULE,
allProductModule, null, null, null, null, null);
cursor.moveToFirst();
while (!cursor.isAfterLast()) {
ProductModule ProductModule = cursorToProductModule(cursor);
daftarproductmodule.add(ProductModule);
cursor.moveToNext();
}
cursor.close();
return daftarproductmodule;
}
希望您能解決您的錯誤。
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