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글쎄 SQLite DB에 관한 질문이 있습니다. 목록보기로 항목을 클릭하면 다음 활동을 표시하는 활동을 만들었습니다. 이것은 앱이 시작될 때 처음 표시되는 주요 활동입니다. 액티비티는 초기화하는 동안 테이블에 값을 삽입하는 것과 같습니다. DB의 테이블에는 기본 키와 고유 필드가있는 필드가 있습니다. 중복 필드가 다음 행에 추가되지 않도록 필드를 고유하게 선언했습니다. 새 행에 동일한 값을 삽입하지 않아야합니다. 값의 초기화 및 삽입은 첫 x 째 활동 자체의 onCreate에 선언됩니다. 하지만 여기서 문제는이 응용 프로그램을 닫았다가 다시 열면 Logcat에 "ButterflyDB에 값을 삽입하는 중 오류가 발생했습니다"라는 오류 메시지가 기록된다는 것입니다. 이 문제는 이미 데이터베이스가 있고 필드가 고유 한 것으로 선언되어 있다는 것을 알고 있습니다. 또한 첫 번째 활동에서 삽입 기능을 호출 할 때 활동을 표시하는 데 많은 시간이 걸립니다. 지연 시간이 거의 없으면 첫 번째 화면이 나타날 때마다 응용 프로그램이 DB에 값을 삽입하는 첫 번째 화면이 나타납니다.데이터베이스를 처리하는 방법 안드로이드에서 올바른 방법
다음과package com.myambitionconsultants.butterflyworld;
import android.app.ListActivity;
import android.content.ContentValues;
import android.content.Intent;
import android.database.Cursor;
import android.database.SQLException;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
public class ButterflyWorldActivity extends ListActivity {
private static final String TAG = ButterflyWorldActivity.class.getSimpleName();
/**
* Declare the variables and objects.
* ButterflyDBAdapter - To initialize the DB, create the tables and store the values in it.
* ImageIDStorage - To store the Image drawable IDs into the table.
* String[], int[] - To access the arrays declared in the data.xml file.
* String - SQL statements to run when this activity is displayed.
* Cursor - To access the records in the row of the table to display.
*/
ButterflyDBAdapter dbAdapter;
ImageIDStorage imgIDStorage;
ButterflyDetailsStorage detailsStorage;
String[] levels, butterfly_common_names, butterfly_scientific_names, image_path, cat_id;
int [] drawableID;
int [] butterfly_id;
String sql_butterfly_cat, sql_drawable_id;
Cursor cur;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
/**
* Initialize the declared variables.
* dbAdapter - Initialize with ButterflyDBAdapter object.
* imgIDStorage - Initialize with ImageIDStorage object.
*
* levels, butterfly_common_names, butterfly_scientific_names, image_path, butterfly_id, cat_id
* - Use the getStringArray() method to load each and every value from the XML.
*/
dbAdapter = new ButterflyDBAdapter(this);
imgIDStorage = new ImageIDStorage(this);
detailsStorage = new ButterflyDetailsStorage(this);
dbAdapter.createTable();
levels = getResources().getStringArray(R.array.butterfly_categories);
butterfly_common_names = getResources().getStringArray(R.array.butterfly_common_names);
butterfly_scientific_names = getResources().getStringArray(R.array.butterfly_scientific_names);
//image_path = getResources().getStringArray(R.array.image_path);
butterfly_id = getResources().getIntArray(R.array.butterfly_id);
cat_id = getResources().getStringArray(R.array.category_id);
//drawables = getResources().getStringArray(R.array.drawable_array);
/**
* Method Calls.
* Insert the Butterfly Categories, Butterflies, ImageIDs in the database.
*/
insertButterflyCategory();
insertButterfly();
imgIDStorage.insertImageID_1();
imgIDStorage.insertImageID_2();
detailsStorage.insertButterflyDetails();
/**
* SQL statement to select the Category Name from the ButterflyCategory Table.
* Initialize the cursor to execute the query from the table.
*/
sql_butterfly_cat = "Select " + ButterflyDBAdapter.COL_CATEGORY_NAME + " from " + ButterflyDBAdapter.BUTTERFLY_CATEGORY;
cur = dbAdapter.getSQLiteDB().rawQuery(sql_butterfly_cat, null);
/**
* After retrieving the rows from the cursor, store the category name values in the array.
* Move the cursor to the first.
* Till the last row value in the table, keep on adding the category names in the array.
*/
//After retrieving the rows from the cursor, store the category name values in the array.
String[] category = new String[cur.getCount()];
Log.i(TAG, "Count: " + cur.getCount());
cur.moveToFirst(); //Move the cursor to the first row.
for(int i = 0; i < cur.getCount(); i++){
//Till the last row value in the table, keep on adding the category names in the array.
category[i] =cur.getString(cur.getColumnIndex(ButterflyDBAdapter.COL_CATEGORY_NAME));
//Move the cursor to the next row
cur.moveToNext();
}
/**
* Use the setListAdapter() method to display the category names in the list.
*/
setListAdapter(new ArrayAdapter<String>(this, R.layout.list_item, category));
/**
* Use the getListView() method.
*/
ListView lv = getListView();
lv.setTextFilterEnabled(true);
/**
* Manage the cursor
*/
startManagingCursor(cur);
/**
* Determine which category was clicked in the list.
* Pass the category name as extra in the bundle.
* Display the next activity with the values passed through the bundle.
*/
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
String category_name = ((TextView) view).getText().toString();
Intent i = new Intent(ButterflyWorldActivity.this, ShowCategory.class);
//Intent i2 = new Intent(ButterflyWorldActivity.this, .class);
i.putExtra("category_name", category_name);
Bundle bundle = new Bundle();
switch(position){
case 0:
bundle.putString("category_name", category_name);
//bundle.putInt("drawable1", R.drawable.tailed_jay_1);
//bundle.putInt("drawable2", R.drawable.blue_bottle_1);
//bundle.putInt("drawable3", R.drawable.common_raven_1);
i.putExtras(bundle);
startActivity(i);
break;
case 1:
bundle.putString("category_name", category_name);
//bundle.putInt("drawable1", R.drawable.common_wanderer_1);
//bundle.putInt("drawable2", R.drawable.common_jezabel_1);
//bundle.putInt("drawable3", R.drawable.psyche_1);
i.putExtras(bundle);
startActivity(i);
break;
case 2:
bundle.putString("category_name", category_name);
//bundle.putInt("drawable1", R.drawable.common_silverline_1);
//bundle.putInt("drawable2", R.drawable.grass_jewel_1);
//bundle.putInt("drawable3", R.drawable.monkey_puzzle_1);
i.putExtras(bundle);
startActivity(i);
break;
case 3:
bundle.putString("category_name", category_name);
//bundle.putInt("drawable1", R.drawable.leopard_1);
//bundle.putInt("drawable1", R.drawable.common_silverline_1);
//bundle.putInt("drawable2", R.drawable.peacock_pansy_1);
//bundle.putInt("drawable3", R.drawable.blue_oakleaf_1);
i.putExtras(bundle);
startActivity(i);
break;
case 4:
bundle.putString("category_name", category_name);
//bundle.putInt("drawable1", R.drawable.chestnut_bob_1);
//bundle.putInt("drawable2", R.drawable.golden_angle_1);
//bundle.putInt("drawable3", R.drawable.grass_demon_1);
//bundle.putInt("drawable3", R.drawable.psyche_1);
i.putExtras(bundle);
startActivity(i);
break;
}
}
});
}
/**
* Insert the butterfly category names into the database.
* The number of values in the levels[] determines the number of
* rows to be put in the ButterflyCategory table.
*/
public void insertButterflyCategory(){
for(int i = 0; i<levels.length;i++){
ContentValues cv = new ContentValues();
//cv.put(ButterflyDBAdapter.COL_CATEGORY_ID, i+1);
cv.put(ButterflyDBAdapter.COL_CATEGORY_NAME, levels[i]);
try{
dbAdapter.getSQLiteDB().insert(ButterflyDBAdapter.BUTTERFLY_CATEGORY, null, cv);
//dbAdapter.getSQLiteDB().insertWithOnConflict(ButterflyDBAdapter.BUTTERFLY_CATEGORY, null, cv,SQLiteDatabase.CONFLICT_IGNORE);
//dbAdapter.getSQLiteDB().insertOrThrow(ButterflyDBAdapter.BUTTERFLY_CATEGORY, null, cv);
}catch(SQLException e) {
e.printStackTrace();
}
}
Log.i(TAG, "Category Values inserted in " + ButterflyDBAdapter.BUTTERFLY_CATEGORY);
}
/**
* Insert the butterfly details such as category id, common name, scientific name and detailed info into the database.
* The number of values in the butterfly_common_names[] determines the number of
* rows to be put in the Butterfly table.
*/
public void insertButterfly(){
for(int i = 0; i<butterfly_common_names.length;i++){
ContentValues cv = new ContentValues();
cv.put(ButterflyDBAdapter.COL_BUTTERFLY_COMMON_NAME, butterfly_common_names[i]);
cv.put(ButterflyDBAdapter.COL_CAT_ID, Integer.parseInt(cat_id[i]));
cv.put(ButterflyDBAdapter.COL_BUTTERFLY_SCIENTIFIC_NAME, butterfly_scientific_names[i]);
try{
dbAdapter.getSQLiteDB().insert(ButterflyDBAdapter.BUTTERFLY, null, cv);
//dbAdapter.getSQLiteDB().insertWithOnConflict(ButterflyDBAdapter.BUTTERFLY_CATEGORY, null, cv,SQLiteDatabase.CONFLICT_IGNORE);
//dbAdapter.getSQLiteDB().insertOrThrow(ButterflyDBAdapter.BUTTERFLY_CATEGORY, null, cv);
}catch(SQLException e) {
e.printStackTrace();
}
}
Log.i(TAG, "Butterfly Values inserted in " + ButterflyDBAdapter.BUTTERFLY);
}
/**
* Close the database and cursor on finish of activity.
*/
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
dbAdapter.getSQLiteDB().close();
cur.close();
imgIDStorage.closeDB();
detailsStorage.closeDB();
//super.onDestroy();
}
/**
* Close the database and cursor on finish of activity.
*/
@Override
protected void onPause() {
// TOD Auto-generated method stub
super.onPause();
dbAdapter.getSQLiteDB().close();
cur.close();
imgIDStorage.closeDB();
detailsStorage.closeDB();
//super.onPause();
}
}
이의 DDMS가 될 때 :
12-09 11:38:53.299: E/Database(1375): android.database.sqlite.SQLiteConstraintException: error code 19: constraint failed
12-09 11:38:53.299: E/Database(1375): at android.database.sqlite.SQLiteStatement.native_execute(Native Method)
12-09 11:38:53.299: E/Database(1375): at android.database.sqlite.SQLiteStatement.execute(SQLiteStatement.java:55)
12-09 11:38:53.299: E/Database(1375): at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1549)
12-09 11:38:53.299: E/Database(1375): at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1410)
12-09 11:38:53.299: E/Database(1375): at com.myambitionconsultants.butterflyworld.ButterflyWorldActivity.insertButterflyCategory(ButterflyWorldActivity.java:204)
12-09 11:38:53.299: E/Database(1375): at com.myambitionconsultants.butterflyworld.ButterflyWorldActivity.onCreate(ButterflyWorldActivity.java:78)
12-09 11:38:53.299: E/Database(1375): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
12-09 11:38:53.299: E/Database(1375): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
12-09 11:38:53.299: E/Database(1375): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
12-09 11:38:53.299: E/Database(1375): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
12-09 11:38:53.299: E/Database(1375): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
12-09 11:38:53.299: E/Database(1375): at android.os.Handler.dispatchMessage(Handler.java:99)
12-09 11:38:53.299: E/Database(1375): at android.os.Looper.loop(Looper.java:123)
12-09 11:38:53.299: E/Database(1375): at android.app.ActivityThread.main(ActivityThread.java:4627)
12-09 11:38:53.299: E/Database(1375): at java.lang.reflect.Method.invokeNative(Native Method)
12-09 11:38:53.299: E/Database(1375): at java.lang.reflect.Method.invoke(Method.java:521)
12-09 11:38:53.299: E/Database(1375): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
12-09 11:38:53.299: E/Database(1375): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
12-09 11:38:53.299: E/Database(1375): at dalvik.system.NativeStart.main(Native Method)
12-09 11:38:53.369: E/Database(1375): Error inserting CategoryName=Pieridae
12-09 11:38:53.369: E/Database(1375): android.database.sqlite.SQLiteConstraintException: error code 19: constraint failed
12-09 11:38:53.369: E/Database(1375): at android.database.sqlite.SQLiteStatement.native_execute(Native Method)
12-09 11:38:53.369: E/Database(1375): at android.database.sqlite.SQLiteStatement.execute(SQLiteStatement.java:55)
12-09 11:38:53.369: E/Database(1375): at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1549)
12-09 11:38:53.369: E/Database(1375): at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1410)
12-09 11:38:53.369: E/Database(1375): at com.myambitionconsultants.butterflyworld.ButterflyWorldActivity.insertButterflyCategory(ButterflyWorldActivity.java:204)
12-09 11:38:53.369: E/Database(1375): at com.myambitionconsultants.butterflyworld.ButterflyWorldActivity.onCreate(ButterflyWorldActivity.java:78)
12-09 11:38:53.369: E/Database(1375): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
12-09 11:38:53.369: E/Database(1375): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
12-09 11:38:53.369: E/Database(1375): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
12-09 11:38:53.369: E/Database(1375): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
12-09 11:38:53.369: E/Database(1375): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
12-09 11:38:53.369: E/Database(1375): at android.os.Handler.dispatchMessage(Handler.java:99)
12-09 11:38:53.369: E/Database(1375): at android.os.Looper.loop(Looper.java:123)
12-09 11:38:53.369: E/Database(1375): at android.app.ActivityThread.main(ActivityThread.java:4627)
12-09 11:38:53.369: E/Database(1375): at java.lang.reflect.Method.invokeNative(Native Method)
12-09 11:38:53.369: E/Database(1375): at java.lang.reflect.Method.invoke(Method.java:521)
12-09 11:38:53.369: E/Database(1375): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
12-09 11:38:53.369: E/Database(1375): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
12-09 11:38:53.369: E/Database(1375): at dalvik.system.NativeStart.main(Native Method)
내 코드는?