java.lang.OutOfMemoryError：从Sqlite Android读取数据时[内存耗尽

Question

我已成功地将数据保存在SQLite DB中。但我在从SQLite数据库读取数据时出现了一个错误，然后我的应用程序崩溃了。

错误信息

01-01 05:42:13.916 607-607/com.example.eyesaver I/dalvikvm:   | sysTid=607 nice=0 sched=0/0 cgrp=apps handle=68313184
01-01 05:42:13.916 607-607/com.example.eyesaver I/dalvikvm:   | sysTid=607 nice=0 sched=0/0 cgrp=apps handle=68313184
01-01 05:42:13.916 607-607/com.example.eyesaver I/dalvikvm:   | state=R schedstat=( 0 0 0 ) utm=2910 stm=2910 core=0
01-01 05:42:13.916 607-607/com.example.eyesaver I/dalvikvm:   | state=R schedstat=( 0 0 0 ) utm=2910 stm=2910 core=0
01-01 05:42:13.917 607-607/com.example.eyesaver I/dalvikvm:     at android.database.CursorWindow.nativeGetString(Native Method)
01-01 05:42:13.917 607-607/com.example.eyesaver I/dalvikvm:     at android.database.CursorWindow.nativeGetString(Native Method)
01-01 05:42:13.917 607-607/com.example.eyesaver I/dalvikvm:     at android.database.CursorWindow.getString(CursorWindow.java:434)
01-01 05:42:13.917 607-607/com.example.eyesaver I/dalvikvm:     at android.database.CursorWindow.getString(CursorWindow.java:434)
01-01 05:42:13.917 607-607/com.example.eyesaver I/dalvikvm:     at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:51)
01-01 05:42:13.917 607-607/com.example.eyesaver I/dalvikvm:     at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:51)
01-01 05:42:13.917 607-607/com.example.eyesaver I/dalvikvm:     at com.example.eyesaver.SQ_Lite_DB.ReadSqliteData(SQ_Lite_DB.java:59)
01-01 05:42:13.917 607-607/com.example.eyesaver I/dalvikvm:     at com.example.eyesaver.SQ_Lite_DB.ReadSqliteData(SQ_Lite_DB.java:59)// I marked this line in code

1-01 05:42:16.189 607-607/com.example.eyesaver E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.eyesaver, PID: 607
    java.lang.OutOfMemoryError: [memory exhausted]
        at dalvik.system.NativeStart.main(Native Method)
01-01 05:42:16.189 607-607/com.example.eyesaver E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.eyesaver, PID: 607
    java.lang.OutOfMemoryError: [memory exhausted]
        at dalvik.system.NativeStart.main(Native Method)

public void ReadSqliteData(Context context){
    ArrayList<Model> list = new ArrayList<>();
    Adpter adpter = new Adpter(list,context);
    SQLiteDatabase database = getWritableDatabase();
    Cursor cursor = database.rawQuery("Select name, image from orders",null);
    if (cursor.moveToFirst()){
        while (cursor.moveToFirst()){
            Model model = new Model();
            model.setImage(cursor.getString(0));   //i am getting error here 
            model.setName(cursor.getString(1));    //i am getting error here 
            list.add(model);
        }
        adpter.notifyDataSetChanged();
    }
    cursor.close();
    database.close();
}

@Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL(
                "Create Table orders"+
                        "(id INTERGER PRIMARY KEY,"+
                        "image text ,"+
                        "name text)"
        );
    }

如果你需要任何其他信息，请告诉我。

Answer 1

循环永远不会结束，因为在每次迭代中，您使用MoveToFirst()在第一行设置光标的索引，而不前进到下一行。
仅使用MoveToNext():

public void ReadSqliteData(Context context){
    ArrayList<Model> list = new ArrayList<>();
    Adpter adpter = new Adpter(list,context);
    SQLiteDatabase database = getWritableDatabase();
    Cursor cursor = database.rawQuery("Select name, image from orders",null);
    while (cursor.moveToNext()){
        Model model = new Model();
        model.setImage(cursor.getString(0));            
        model.setName(cursor.getString(1));    
        list.add(model);
    }
    adpter.notifyDataSetChanged();
    cursor.close();
    database.close();
}