Thread safety when iterating through an ArrayList using foreach

Question

I\'ve got an ArrayList which is being instantiated and populated on the background thread (I use it to store the Cursor data). At the same time it

Answer 1

java synchronized block http://www.tutorialspoint.com/java/java_thread_synchronization.htm

class SomeClass {

    private final Context mContext;
    private List mList = null;

    SomeClass(Context context) {
        mContext = context;
    }

    public void populateList() {
        new Thread(new Runnable() {
            @Override
            public void run() {
                synchronized(SomeClass.this){
                    mList = new ArrayList<>();

                    Cursor cursor = mContext.getContentResolver().query(
                            DataProvider.CONTENT_URI, null, null, null, null);
                    try {
                        while (cursor.moveToNext()) {
                            mList.add(cursor.getString(cursor.getColumnIndex(DataProvider.NAME)));
                        }
                    } catch (Exception e) {
                        Log.e("Error", e.getMessage(), e);
                    } finally {
                        if (cursor != null) {
                            cursor.close();
                        }
                    }
                }
            }
        }).start();
    }

    public boolean searchList(String query) { // Invoked on the main thread
    synchronized(SomeClass.this){
            if (mList != null) {
                for (String name : mList) {
                    if (name.equals(query) {
                        return true;
                    }
                }
            }

            return false;
        }
    }
}