我正在使用sqlite数据库处理应用程序。我得到了项目源并运行它，没关系，但是当我使用sqlite浏览器修改数据库时，我在cat log中收到以下错误。
08-18 15:57:57.910: E/CursorWindow(28926): Failed to read row 6, column 5 from a CursorWindow which has 7 rows, 5 columns.
08-18 15:57:57.925: E/AndroidRuntime(28926): FATAL EXCEPTION: AsyncTask #1
08-18 15:57:57.925: E/AndroidRuntime(28926): java.lang.RuntimeException: An error occured while executing doInBackground()
08-18 15:57:57.925: E/AndroidRuntime(28926): at android.os.AsyncTask$3.done(AsyncTask.java:299)
08-18 15:57:57.925: E/AndroidRuntime(28926): at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:352)
08-18 15:57:57.925: E/AndroidRuntime(28926): at java.util.concurrent.FutureTask.setException(FutureTask.java:219)
08-18 15:57:57.925: E/AndroidRuntime(28926): at java.util.concurrent.FutureTask.run(FutureTask.java:239)
08-18 15:57:57.925: E/AndroidRuntime(28926): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
08-18 15:57:57.925: E/AndroidRuntime(28926): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
08-18 15:57:57.925: E/AndroidRuntime(28926): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
08-18 15:57:57.925: E/AndroidRuntime(28926): at java.lang.Thread.run(Thread.java:838)
08-18 15:57:57.925: E/AndroidRuntime(28926): Caused by: java.lang.IllegalStateException: Couldn't read row 6, col 5 from CursorWindow. Make sure the Cursor is initialized correctly before accessing data from it.
08-18 15:57:57.925: E/AndroidRuntime(28926): at android.database.CursorWindow.nativeGetString(Native Method)
08-18 15:57:57.925: E/AndroidRuntime(28926): at android.database.CursorWindow.getString(CursorWindow.java:434)
08-18 15:57:57.925: E/AndroidRuntime(28926): at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:51)
08-18 15:57:57.925: E/AndroidRuntime(28926): at company.profile.app.android.DataBaseHelperCompany.getAllDataProduct(DataBaseHelperCompany.java:204)
08-18 15:57:57.925: E/AndroidRuntime(28926): at company.profile.app.android.Product.getAllProduct(Product.java:211)
08-18 15:57:57.925: E/AndroidRuntime(28926): at company.profile.app.android.Product.access$0(Product.java:210)
08-18 15:57:57.925: E/AndroidRuntime(28926): at company.profile.app.android.Product$CheckListData.doInBackground(Product.java:198)
08-18 15:57:57.925: E/AndroidRuntime(28926): at company.profile.app.android.Product$CheckListData.doInBackground(Product.java:1)
08-18 15:57:57.925: E/AndroidRuntime(28926): at android.os.AsyncTask$2.call(AsyncTask.java:287)
08-18 15:57:57.925: E/AndroidRuntime(28926): at java.util.concurrent.FutureTask.run(FutureTask.java:234)
08-18 15:57:57.925: E/AndroidRuntime(28926): ... 4 more
08-18 15:57:58.308: E/WindowManager(28926): Activity company.profile.app.android.Portfolio has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{41fe6380 V.E..... R.....ID 0,0-407,175} that was originally added here
08-18 15:57:58.308: E/WindowManager(28926): android.view.WindowLeaked: Activity company.profile.app.android.Portfolio has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{41fe6380 V.E..... R.....ID 0,0-407,175} that was originally added here
08-18 15:57:58.308: E/WindowManager(28926): at android.view.ViewRootImpl.<init>(ViewRootImpl.java:424)
08-18 15:57:58.308: E/WindowManager(28926): at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:218)
08-18 15:57:58.308: E/WindowManager(28926): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
08-18 15:57:58.308: E/WindowManager(28926): at android.app.Dialog.show(Dialog.java:281)
08-18 15:57:58.308: E/WindowManager(28926): at android.app.ProgressDialog.show(ProgressDialog.java:116)
08-18 15:57:58.308: E/WindowManager(28926): at android.app.ProgressDialog.show(ProgressDialog.java:99)
08-18 15:57:58.308: E/WindowManager(28926): at company.profile.app.android.Product$CheckListData.onPreExecute(Product.java:190)
08-18 15:57:58.308: E/WindowManager(28926): at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:586)
08-18 15:57:58.308: E/WindowManager(28926): at android.os.AsyncTask.execute(AsyncTask.java:534)
08-18 15:57:58.308: E/WindowManager(28926): at company.profile.app.android.Product.onResume(Product.java:36)
08-18 15:57:58.308: E/WindowManager(28926): at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1259)
08-18 15:57:58.308: E/WindowManager(28926): at android.app.Activity.performResume(Activity.java:5200)
08-18 15:57:58.308: E/WindowManager(28926): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2931)
08-18 15:57:58.308: E/WindowManager(28926): at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:178)
08-18 15:57:58.308: E/WindowManager(28926): at android.app.LocalActivityManager.dispatchResume(LocalActivityManager.java:523)
08-18 15:57:58.308: E/WindowManager(28926): at android.app.ActivityGroup.onResume(ActivityGroup.java:61)
08-18 15:57:58.308: E/WindowManager(28926): at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1259)
08-18 15:57:58.308: E/WindowManager(28926): at android.app.Activity.performResume(Activity.java:5200)
08-18 15:57:58.308: E/WindowManager(28926): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2931)
08-18 15:57:58.308: E/WindowManager(28926): at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2973)
08-18 15:57:58.308: E/WindowManager(28926): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2408)
08-18 15:57:58.308: E/WindowManager(28926): at android.app.ActivityThread.access$600(ActivityThread.java:165)
08-18 15:57:58.308: E/WindowManager(28926): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1373)
08-18 15:57:58.308: E/WindowManager(28926): at android.os.Handler.dispatchMessage(Handler.java:107)
08-18 15:57:58.308: E/WindowManager(28926): at android.os.Looper.loop(Looper.java:194)
08-18 15:57:58.308: E/WindowManager(28926): at android.app.ActivityThread.main(ActivityThread.java:5370)
08-18 15:57:58.308: E/WindowManager(28926): at java.lang.reflect.Method.invokeNative(Native Method)
08-18 15:57:58.308: E/WindowManager(28926): at java.lang.reflect.Method.invoke(Method.java:525)
08-18 15:57:58.308: E/WindowManager(28926): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833)
08-18 15:57:58.308: E/WindowManager(28926): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
08-18 15:57:58.308: E/WindowManager(28926): at dalvik.system.NativeStart.main(Native Method)
以下是我的数据库帮助文件。
package company.profile.app.android;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
public class DataBaseHelperCompany extends SQLiteOpenHelper{
//The Android's default system path of your application database.
private static String DB_PATH = "/data/data/company.profile.app.android/databases/";
private final static String DB_NAME = "db_company";
public final int DB_VERSION = 1;
private SQLiteDatabase myDataBase;
private final Context myContext;
private final String TABLE_NAME_PRODUCT = "tbl_product";
private final String TABLE_ROW_ID_PRODUCT = "id";
private final String TITLE_PRODUCT = "title_product";
private final String CATEGORY_PRODUCT = "category_product";
private final String DESC_PRODUCT = "desc_product";
private final String IMAGE_PRODUCT = "image_product";
private final String TABLE_NAME_SERVICE = "tbl_service";
private final String TABLE_ROW_ID_SERVICE = "id";
private final String TITLE_SERVICE = "title_service";
private final String CATEGORY_SERVICE = "category_service";
private final String DESC_SERVICE = "desc_service";
private final String IMAGE_SERVICE = "image_service";
boolean ada = false;
/**
* Constructor
* Takes and keeps a reference of the passed context in order to access to the application assets and resources.
* @param context
*/
public DataBaseHelperCompany(Context context) {
super(context, DB_NAME, null, 1);
this.myContext = context;
}
/**
* Creates a empty database on the system and rewrites it with your own database.
* */
public void createDataBase() throws IOException{
boolean dbExist = checkDataBase();
SQLiteDatabase db_Read = null;
if(dbExist){
//Toast.makeText(myContext, "Create Database \n " +
// "Database", Toast.LENGTH_SHORT).show();
//do nothing - database already exist
}else{
//By calling this method and empty database will be created into the default system path
//of your application so we are gonna be able to overwrite that database with our database.
db_Read = this.getReadableDatabase();
db_Read.close();
try {
//Toast.makeText(myContext, "No Database \n" +
// "Call method Copy Database", Toast.LENGTH_SHORT).show();
copyDataBase();
} catch (IOException e) {
throw new Error("Error copying database");
}
}
}
/**
* Check if the database already exist to avoid re-copying the file each time you open the application.
* @return true if it exists, false if it doesn't
*/
private boolean checkDataBase(){
SQLiteDatabase checkDB = null;
try{
String myPath = DB_PATH + DB_NAME;
checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
//Toast.makeText(myContext, "Database", Toast.LENGTH_SHORT).show();
}catch(SQLiteException e){
//Toast.makeText(myContext, "No Database", Toast.LENGTH_SHORT).show();
//database does't exist yet.
}
if(checkDB != null){
checkDB.close();
}
return checkDB != null ? true : false;
}
/**
* Copies your database from your local assets-folder to the just created empty database in the
* system folder, from where it can be accessed and handled.
* This is done by transfering bytestream.
* */
private void copyDataBase() throws IOException{
//Toast.makeText(myContext, "Copy database", Toast.LENGTH_SHORT);
//Open your local db as the input stream
InputStream myInput = myContext.getAssets().open(DB_NAME);
// Path to the just created empty db
String outFileName = DB_PATH + DB_NAME;
//Open the empty db as the output stream
OutputStream myOutput = new FileOutputStream(outFileName);
//transfer bytes from the inputfile to the outputfile
byte[] buffer = new byte[1024];
int length;
while ((length = myInput.read(buffer))>0){
myOutput.write(buffer, 0, length);
}
//Close the streams
myOutput.flush();
myOutput.close();
myInput.close();
}
public void openDataBase() throws SQLException{
//Toast.makeText(myContext, "Database Open", Toast.LENGTH_SHORT);
//Open the database
String myPath = DB_PATH + DB_NAME;
myDataBase = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READWRITE);
}
@Override
public synchronized void close() {
if(myDataBase != null)
myDataBase.close();
super.close();
}
@Override
public void onCreate(SQLiteDatabase db) {
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
// Add your public helper methods to access and get content from the database.
// You could return cursors by doing "return myDataBase.query(....)" so it'd be easy
// to you to create adapters for your views.
public ArrayList<ArrayList<Object>> getAllDataProduct()
{
// create an ArrayList that will hold all of the data collected from
// the database.
ArrayList<ArrayList<Object>> dataArrays = new ArrayList<ArrayList<Object>>();
// this is a database call that creates a "cursor" object.
// the cursor object store the information collected from the
// database and is used to iterate through the data.
Cursor cursor = null;
try
{
// ask the database object to create the cursor.
cursor = myDataBase.query(
TABLE_NAME_PRODUCT,
new String[]{TABLE_ROW_ID_PRODUCT, TITLE_PRODUCT, DESC_PRODUCT, IMAGE_PRODUCT, CATEGORY_PRODUCT},
null,null, null, null, null
);
// move the cursor's pointer to position zero.
cursor.moveToLast();
// if there is data after the current cursor position, add it
// to the ArrayList.
if (!cursor.isBeforeFirst())
{
do
{
ArrayList<Object> dataList = new ArrayList<Object>();
dataList.add(cursor.getLong(0));
dataList.add(cursor.getString(1));
dataList.add(cursor.getString(2));
dataList.add(cursor.getString(3));
dataList.add(cursor.getString(4));
dataList.add(cursor.getString(5));
dataList.add(cursor.getString(6));
dataArrays.add(dataList);
}
// move the cursor's pointer up one position.
while (cursor.moveToPrevious());
}
cursor.close();
}
catch (SQLException e)
{
Log.e("DB Error", e.toString());
e.printStackTrace();
}
// return the ArrayList that holds the data collected from
// the database.
return dataArrays;
}
public ArrayList<ArrayList<Object>> getAllDataService()
{
// create an ArrayList that will hold all of the data collected from
// the database.
ArrayList<ArrayList<Object>> dataArrays = new ArrayList<ArrayList<Object>>();
// this is a database call that creates a "cursor" object.
// the cursor object store the information collected from the
// database and is used to iterate through the data.
Cursor cursor = null;
try
{
// ask the database object to create the cursor.
cursor = myDataBase.query(
TABLE_NAME_SERVICE,
new String[]{TABLE_ROW_ID_SERVICE, TITLE_SERVICE, DESC_SERVICE, IMAGE_SERVICE, CATEGORY_SERVICE},
null,null, null, null, null
);
// move the cursor's pointer to position zero.
cursor.moveToLast();
// if there is data after the current cursor position, add it
// to the ArrayList.
if (!cursor.isBeforeFirst())
{
do
{
ArrayList<Object> dataList = new ArrayList<Object>();
dataList.add(cursor.getLong(0));
dataList.add(cursor.getString(1));
dataList.add(cursor.getString(2));
dataList.add(cursor.getString(3));
dataList.add(cursor.getString(4));
dataList.add(cursor.getString(5));
dataList.add(cursor.getString(6));
dataList.add(cursor.getString(7));
dataArrays.add(dataList);
}
// move the cursor's pointer up one position.
while (cursor.moveToPrevious());
}
cursor.close();
}
catch (SQLException e)
{
Log.e("DB Error", e.toString());
e.printStackTrace();
}
// return the ArrayList that holds the data collected from
// the database.
return dataArrays;
}
Product.java
package company.profile.app.android;
import java.io.IOException;
import java.util.ArrayList;
import android.app.Activity;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.res.Configuration;
import android.database.SQLException;
import android.graphics.drawable.Drawable;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.*;
import android.widget.AdapterView.OnItemClickListener;
public class Product extends Activity{
ListView listProduct;
ProductAdapter eaListProduct;
static String[] title, desc, image, category;
static int [] id;
Button back;
Dialog dialog;
DataBaseHelperCompany myDbHelperCompany;
ArrayList<ArrayList<Object>> data;
@Override
protected void onResume(){
super.onResume();
new CheckListData().execute();
eaListProduct.notifyDataSetChanged();
eaListProduct.notifyDataSetInvalidated();
listProduct.invalidateViews();
}
public class ProductAdapter extends BaseAdapter {
private LayoutInflater mInflater;
public ProductAdapter(Context c) {
mInflater = LayoutInflater.from(c);
}
public int getCount() {
return title.length;
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.row_product, null);
holder = new ViewHolder();
holder.txtTitleProduct = (TextView) convertView.findViewById(R.id.txtTitleProduct);
holder.txtCatProduct = (TextView) convertView.findViewById(R.id.txtCatProduct);
holder.ImageProduct = (ImageView) convertView.findViewById(R.id.imgProduct);
convertView.setTag(holder);
} else{
holder = (ViewHolder) convertView.getTag();
}
holder.txtTitleProduct.setText(title[position]);
holder.txtCatProduct.setText(category[position]);
String uri = image[position];
int imageResource = getResources().getIdentifier(uri, null, getPackageName());
Drawable image = getResources().getDrawable(imageResource);
holder.ImageProduct.setImageDrawable(image);
holder.ImageProduct.setScaleType(ImageView.ScaleType.FIT_XY);
//holder.ImageProduct.setImageResource(R.drawable.product1);
return convertView;
}
public class ViewHolder {
TextView txtTitleProduct;
TextView txtCatProduct;
ImageView ImageProduct;
}
}
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.product);
listProduct = (ListView) findViewById(R.id.listProduct);
//Check Database
myDbHelperCompany= new DataBaseHelperCompany(this);
try {
myDbHelperCompany.createDataBase();
}catch(IOException ioe){
throw new Error("Unable to create database");
}
try{
myDbHelperCompany.openDataBase();
}catch(SQLException sqle){
throw sqle;
}
eaListProduct = new ProductAdapter(this);
listProduct.setFastScrollEnabled(true);
/*ColorDrawable divcolor = new ColorDrawable(Color.DKGRAY);
listProduct.setDivider(divcolor);
listProduct.setDividerHeight(4);
*/
listProduct.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long idn) {
dialog = new Dialog(Product.this);
dialog.setContentView(R.layout.dialog_product);
dialog.setTitle("Item Descriptions");
dialog.setCancelable(true);
//set up text
TextView text_title = (TextView) dialog.findViewById(R.id.txt_title_product);
text_title.setText(title[position]);
//set up text
TextView text_cat = (TextView) dialog.findViewById(R.id.txt_cat_product);
text_cat.setText(category[position]);
//set up text
TextView text_desc = (TextView) dialog.findViewById(R.id.txt_desc_product);
text_desc.setText(desc[position]);
//set up image view
ImageView img = (ImageView) dialog.findViewById(R.id.ImageProduct);
String uri = image[position];
int imageResource = getResources().getIdentifier(uri, null, getPackageName());
Drawable image = getResources().getDrawable(imageResource);
img.setImageDrawable(image);
img.setScaleType(ImageView.ScaleType.FIT_XY);
//set up button
Button button = (Button) dialog.findViewById(R.id.btnClose);
button.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
dialog.dismiss();
}
});
//now that the dialog is set up, it's time to show it
dialog.show();
}
});
back = (Button) findViewById(R.id.btnBack);
back.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
// TODO Auto-generated method stub
finish();
}
});
}
@Override
public void onConfigurationChanged(final Configuration newConfig)
{
// Ignore orientation change to keep activity from restarting
super.onConfigurationChanged(newConfig);
}
//this asyntask for display all data
public class CheckListData extends AsyncTask<Void, Void, Void> {
ProgressDialog dialog;
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
dialog= ProgressDialog.show(Product.this, "",
"Read data..., please wait...", true);
}
@Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
getAllProduct();
return null;
}
@Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
listProduct.setAdapter(eaListProduct);
dialog.dismiss();
}
}
private void getAllProduct(){
data = myDbHelperCompany.getAllDataProduct();
id = new int[data.size()];
title = new String[data.size()];
desc = new String[data.size()];
image = new String[data.size()];
category = new String[data.size()];
for(int position = 0; position < data.size(); position++){
ArrayList<Object> row = data.get(position);
id[position] = Integer.parseInt(row.get(0).toString());
title[position] = row.get(1).toString();
desc[position] = row.get(2).toString();
image[position] = row.get(3).toString();
category[position] = row.get(4).toString();
}
}
}
答案 0 :(得分：0)
更改您的DatabseHelper类，如：
if(cursor != null){
if (cursor.moveToFirst()){
do{
ArrayList<Object> dataList = new ArrayList<Object>();
dataList.add(cursor.getLong(0));
dataList.add(cursor.getString(1));
dataList.add(cursor.getString(2));
dataList.add(cursor.getString(3));
dataList.add(cursor.getString(4));
dataList.add(cursor.getString(5));
dataList.add(cursor.getString(6));
dataArrays.add(dataList);
}
while (cursor.moveToNext());
}
}
cursor.close;
修改
从dataList.add移除最后两行getAllDataProduct()行，从getAllDataService()方法移除最后三行。