我想使用我已经使用SQLite数据库浏览器创建的预加载数据库来填充listview。但是，我不断收紧。对于DatabaseHelper类，我精确地在http://www.reigndesign.com/blog/using-your-own-sqlite-database-in-android-applications/上跟随了教程

这里是我的代码显示listView：

public class POITab extends ListActivity {

private SQLiteDatabase newDb;

protected Cursor cursor;

protected ListAdapter adapter;

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

openDatabase();

}

private void openDatabase() {

POIHelper dbHelper = new POIHelper(this.getApplicationContext());

newDb = dbHelper.getWritableDatabase();

cursor = newDb.rawQuery("SELECT _id, Name FROM POI", null);

adapter = new SimpleCursorAdapter(this, R.layout.listitem, cursor, new String[] {"Name"}, new int[] {R.id.name});

setListAdapter(adapter);

}

@Override

public void onListItemClick(ListView parent, View view, int position, long id) {

Toast.makeText(getApplicationContext(), ((TextView) view).getText(),

Toast.LENGTH_SHORT).show();

}更新：我不知道，但我想问题在于线

cursor = newDb.rawQuery("SELECT _id, Name FROM POI", null);这是我的databaseHelper类的代码：

public class POIHelper extends SQLiteOpenHelper {

private static String DB_PATH = "/data/data/com.test.mysgapp/databases/";

private static String DB_NAME = "MySgAppdb";

private SQLiteDatabase myDatabase;

private final Context myContext;

public POIHelper(Context context) {

super(context, DB_NAME, null, 1);

this.myContext = context;

}

public void createDatabase() throws IOException {

boolean dbExist = checkDatabase();

if(dbExist) {

} else {

this.getReadableDatabase();

try {

copyDatabase();

} catch (IOException e) {

throw new Error("Error copying database");

}

}

}

private boolean checkDatabase() {

SQLiteDatabase checkDb = null;

try {

String myPath = DB_PATH + DB_NAME;

checkDb = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);

} catch (SQLiteException e) {

}

if(checkDb != null) {

checkDb.close();

}

return checkDb != null ? true : false;

}

private void copyDatabase() throws IOException{

InputStream input = myContext.getAssets().open(DB_NAME);

String outFileName = DB_PATH + DB_NAME;

OutputStream output = new FileOutputStream(outFileName);

byte[] buffer = new byte[1024];

int length;

while ((length = input.read(buffer))>0) {

output.write(buffer, 0, length);

}

output.flush();

output.close();

input.close();

}

public void openDatabase() throws IOException {

String path = DB_PATH + DB_NAME;

myDatabase = SQLiteDatabase.openDatabase(path, null, SQLiteDatabase.OPEN_READONLY);

}

@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) {

}}

错误日志：

01-10 16:11:52.332: ERROR/AndroidRuntime(1311): FATAL EXCEPTION: main

01-10 16:11:52.332: ERROR/AndroidRuntime(1311):

java.lang.RuntimeException: Unable to start activity

ComponentInfo{com.test.mysgapp/com.test.mysgapp.POITab}:

android.database.sqlite.SQLiteException: no such table: Places: ,

while compiling: SELECT _id, Name FROM Places 01-10 16:11:52.332:

ERROR/AndroidRuntime(1311): at

android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)

01-10 16:11:52.332: ERROR/AndroidRuntime(1311): at

android.app.ActivityThread.startActivityNow(ActivityThread.java:2503)

01-10 16:11:52.332: ERROR/AndroidRuntime(1311): at

android.app.LocalActivityManager.moveToState(LocalActivityManager.java:127)

01-10 16:11:52.332: ERROR/AndroidRuntime(1311): at

android.app.LocalActivityManager.startActivity(LocalActivityManager.java:339)

01-10 16:11:52.332: ERROR/AndroidRuntime(1311): at

android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:651)

01-10 16:11:52.332: ERROR/AndroidRuntime(1311): at

android.widget.TabHost.setCurrentTab(TabHost.java:323) 01-10

16:11:52.332: ERROR/AndroidRuntime(1311): at

android.widget.TabHost$2.onTabSelectionChanged(TabHost.java:129) 01-10

16:11:52.332: ERROR/AndroidRuntime(1311): at

android.widget.TabWidget$TabClickListener.onClick(TabWidget.java:453)

01-10 16:11:52.332: ERROR/AndroidRuntime(1311): at

android.view.View.performClick(View.java:2408) 01-10 16:11:52.332:

ERROR/AndroidRuntime(1311): at

android.view.View$PerformClick.run(View.java:8816) 01-10 16:11:52.332:

ERROR/AndroidRuntime(1311): at

android.os.Handler.handleCallback(Handler.java:587) 01-10

16:11:52.332: ERROR/AndroidRuntime(1311): at

android.os.Handler.dispatchMessage(Handler.java:92) 01-10

16:11:52.332: ERROR/AndroidRuntime(1311): at

android.os.Looper.loop(Looper.java:123) 01-10 16:11:52.332:

ERROR/AndroidRuntime(1311): at

android.app.ActivityThread.main(ActivityThread.java:4627) 01-10

16:11:52.332: ERROR/AndroidRuntime(1311): at

java.lang.reflect.Method.invokeNative(Native Method) 01-10

16:11:52.332: ERROR/AndroidRuntime(1311): at

java.lang.reflect.Method.invoke(Method.java:521) 01-10 16:11:52.332:

ERROR/AndroidRuntime(1311): at

com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)

01-10 16:11:52.332: ERROR/AndroidRuntime(1311): at

com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 01-10

16:11:52.332: ERROR/AndroidRuntime(1311): at

dalvik.system.NativeStart.main(Native Method) 01-10 16:11:52.332:

ERROR/AndroidRuntime(1311): Caused by:

android.database.sqlite.SQLiteException: no such table: Places: ,

while compiling: SELECT _id, Name FROM Places 01-10 16:11:52.332:

ERROR/AndroidRuntime(1311): at

android.database.sqlite.SQLiteCompiledSql.native_compile(Native

Method) 01-10 16:11:52.332: ERROR/AndroidRuntime(1311): at

android.database.sqlite.SQLiteCompiledSql.compile(SQLiteCompiledSql.java:91)

01-10 16:11:52.332: ERROR/AndroidRuntime(1311): at

android.database.sqlite.SQLiteCompiledSql.(SQLiteCompiledSql.java:64)

01-10 16:11:52.332: ERROR/AndroidRuntime(1311): at

android.database.sqlite.SQLiteProgram.(SQLiteProgram.java:80)

01-10 16:11:52.332: ERROR/AndroidRuntime(1311): at

android.database.sqlite.SQLiteQuery.(SQLiteQuery.java:46) 01-10

16:11:52.332: ERROR/AndroidRuntime(1311): at

android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:42)

01-10 16:11:52.332: ERROR/AndroidRuntime(1311): at

android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1345)

01-10 16:11:52.332: ERROR/AndroidRuntime(1311): at

android.database.sqlite.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1315)

01-10 16:11:52.332: ERROR/AndroidRuntime(1311): at

com.test.mysgapp.POITab.openDb(POITab.java:42) 01-10 16:11:52.332:

ERROR/AndroidRuntime(1311): at

com.test.mysgapp.POITab.onCreate(POITab.java:36) 01-10 16:11:52.332:

ERROR/AndroidRuntime(1311): at

android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)

01-10 16:11:52.332: ERROR/AndroidRuntime(1311): at

android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)

01-10 16:11:52.332: ERROR/AndroidRuntime(1311): ... 18 more 01-10

16:11:52.392: WARN/ActivityManager(41): Force finishing activity

com.test.mysgapp/.MySgApp