我知道堆栈溢出错误是什么，但我不知道我是如何使用我的代码造成错误的。我在运行程序后立即收到错误，它并没有指向任何类型的递归，而是指向变量定义。我已经看过很多关于这个错误的问题，但我不知道我是怎么造成这个错误的。我的代码在下面，就像我的logcat一样，我标记了错误发生的地方。
public class DatabaseTable {
public static final String TAG = "ConstantDatabase";
//the columns included in the table
public static final String COL_QUANTITY = "QUANTITY";
public static final String COL_VALUE = "VALUE";
public static final String COL_UNCERTAINTY = "UNCERTAINTY";
public static final String COL_UNIT = "UNIT";
public static final String _id = "_id";
//name, tbale name, version
private static final String DATABASE_NAME = "CONSTANTS";
private static final String FTS_VIRTUAL_TABLE = "FTS";
private static final int DATABASE_VERSION = 1;
private final DatabaseOpenHelper mDatabaseOpenHelper;
private final Context mcontext;
public DatabaseTable(Context context){
mDatabaseOpenHelper = new DatabaseOpenHelper(context);
mcontext = context;
}
private class DatabaseOpenHelper extends SQLiteOpenHelper {
private final Context mHelperContext = mcontext;
private final DatabaseOpenHelper hDatabaseOpenHelper = new DatabaseOpenHelper(mHelperContext);
// Stack Overflow error here ^
private SQLiteDatabase mDatabase;
private final MyDataProvider dp = new MyDataProvider(mcontext);
private static final String FTS_TABLE_CREATE =
"CREATE VIRTUAL TABLE " + FTS_VIRTUAL_TABLE +
" USING fts3 (" +_id+ " INTEGER PRIMARY KEY,"+
COL_QUANTITY + " TEXT, " +
COL_VALUE + " TEXT," +
COL_UNCERTAINTY + " TEXT," +
COL_UNIT + " TEXT " + ")";
public DatabaseOpenHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
loadConstants();
Log.e("Database Operation", "DatabaseOpenHelper constructor called, constants loaded?");
}
@Override
public void onCreate(SQLiteDatabase db) {
mDatabase = db;
mDatabase.execSQL(FTS_TABLE_CREATE);
Log.e("Database Operation", "Constants Table Created ...");
loadConstants();
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
Log.w(TAG, "Upgrading database from version " + oldVersion + " to "
+ newVersion + ", which will destroy all old data");
db.execSQL("DROP TABLE IF EXISTS " + FTS_VIRTUAL_TABLE);
onCreate(db);
}
public SQLiteDatabase getmDatabase(){
return mDatabase;
}
// populating the virtual table with a string reading code
private void loadConstants() {
new Thread(new Runnable() {
public void run() {
try {
loadConstantss();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}).start();
Log.e("Loading", "Constants Table Populated ...");
}
private void loadConstantss() throws IOException {
HashMap map = dp.getAllMap();
Iterator<Map.Entry<String, ListViewItem>> entries = map.entrySet().iterator();
while (entries.hasNext()) {
Map.Entry<String, ListViewItem> entry = entries.next();
Log.d("thing:", entry.getKey());
addConstant(entry.getKey(), entry.getValue().getValueS(), entry.getValue().getUncertainty(), entry.getValue().getUnit());
}
// final Resources resources = mHelperContext.getResources();
// InputStream inputStream = resources.openRawResource(R.raw.txt);
// BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
//
// try {
// String line;
// while ((line = reader.readLine()) != null) {
// String[] strings = TextUtils.split(line, ",");
// if (strings.length < 4) continue;
// long id = addConstant(strings[0].trim(), strings[1].trim(), strings[2].trim(), strings[3].trim());
// if (id < 0) {
// Log.e(TAG, "unable to add word: " + strings[0].trim());
// }
// }
// } finally {
// reader.close();
// }
}
public long addConstant(String quantity, String value, String uncertainty, String unit) {
SQLiteDatabase db = hDatabaseOpenHelper.getWritableDatabase();
ContentValues initialValues = new ContentValues();
initialValues.put(COL_QUANTITY, quantity);
initialValues.put(COL_VALUE, value);
initialValues.put(COL_UNCERTAINTY, uncertainty);
initialValues.put(COL_UNIT, unit);
db.insert(FTS_VIRTUAL_TABLE, null, initialValues);
return db.insert(FTS_VIRTUAL_TABLE, null, initialValues);
}
//database openhelper ends
}
public Cursor getWordMatches(String query, String[] columns) {
String selection = COL_QUANTITY + " MATCH ?";
String[] selectionArgs = new String[] {query+"*"};
return query(selection, selectionArgs, columns);
}
public Cursor query(String selection, String[] selectionArgs, String[] columns) {
SQLiteQueryBuilder builder = new SQLiteQueryBuilder();
builder.setTables(FTS_VIRTUAL_TABLE);
Cursor cursor = builder.query(mDatabaseOpenHelper.getReadableDatabase(),
columns, selection, selectionArgs, null, null, null);
if (cursor == null) {
return null;
} else if (!cursor.moveToFirst()) {
cursor.close();
return null;
}
return cursor;
}
//get all titles
public Cursor getAllTitles()
{
return mDatabaseOpenHelper.getmDatabase().query(FTS_VIRTUAL_TABLE, new String[] {
COL_QUANTITY,
COL_UNCERTAINTY,
COL_UNIT,
COL_VALUE},
null,
null,
null,
null,
null);
}
}
logcat的：
07-07 10:11:42.947 14069-14069/com.gmd.referenceapplication D/Error: ERR: stack=java.lang.StackOverflowError: stack size 8MB
at android.database.sqlite.SQLiteOpenHelper.<init>(SQLiteOpenHelper.java:77)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:0)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
at com.gmd.referenceapplication.DatabaseTable$DatabaseOpenHelper.<init>(DatabaseTable.java:61)
07-07 10:11:42.949 14069-14069/com.gmd.referenceapplication D/Error: ERR: TOTAL BYTES WRITTEN: 20092852
07-07 10:11:42.949 14069-14069/com.gmd.referenceapplication E/JavaBinder: !!! FAILED BINDER TRANSACTION !!! (parcel size = 20092936)
07-07 10:11:42.950 14069-14069/com.gmd.referenceapplication E/AndroidRuntime: Error reporting crash
android.os.TransactionTooLargeException: data parcel size 20092936 bytes
at android.os.BinderProxy.transactNative(Native Method)
at android.os.BinderProxy.transact(Binder.java:503)
at android.app.ActivityManagerProxy.handleApplicationCrash(ActivityManagerNative.java:4425)
at com.android.internal.os.RuntimeInit$UncaughtHandler.uncaughtException(RuntimeInit.java:90)
at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:693)
at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:690)
07-07 10:11:42.950 14069-14069/com.gmd.referenceapplication I/Process: Sending signal. PID: 14069 SIG: 9
非常感谢您的帮助。
答案 0 :(得分：3)
您在每个DatabaseOpenHelper中创建DatabaseOpenHelper的事实是您的问题：
private class DatabaseOpenHelper extends SQLiteOpenHelper {
private final DatabaseOpenHelper hDatabaseOpenHelper = new DatabaseOpenHelper(mHelperContext); //this line is your problem
....
}
此初始化程序在构造函数中执行，构造函数执行构造函数等...