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android – Favourite content is not shown correctly on webview

Posted by: admin April 1, 2020 Leave a comment

Questions:

I’m developing a language dictionary app. I save the favourite word into Preference. The Favourite content in the XML file looks like the following:

<?xml version='1.0' encoding='utf-8' standalone='yes' ?>
  <map>
    <string name="history">
      dict_name::160170::hi,dict_name::157140::he-man,dict_name::184774::jet,dict_name::34527::black
    </string>
    <string name="waitingTime">
      0
    </string>
    <boolean name="saveFavourite" value="true" />
    <string name="defaultDictionary">
      dict_name
    </string>
    <string name="favourite">
      dict_name::149271::go,dict_name::25481::back,dict_name::184774::jet
    </string>
    <boolean name="saveHistory" value="true" />
  </map>

I use the following code to load the Favourite content into the webview:

public class User extends Activity {
    private static final String FAVOURITE_TAG = "[MyDict - FavouriteView] ";
    private static final String CONTENT_TAG = null;

    private ListView mLSTFavourite = null;
    private ArrayList<String> lstDict = null;
    private ArrayList<Integer> lstId = null;
    private ArrayList<String> mWordFavourite = null;
    private ArrayAdapter<String> aptList = null;
    private SharedPreferences prefs;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.favourite);
        prefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());

        if (prefs.getBoolean("saveFavourite", true)) {
            String strFavourite = prefs.getString("favourite", "");
            Log.i(FAVOURITE_TAG, "Favourite loaded");
            if (strFavourite != null && !strFavourite.equals("")) {
                mWordFavourite = new ArrayList<String>(Arrays.asList(strFavourite.split(",")));
            } else {
                mWordFavourite = new ArrayList<String>();
            }
        } else {
            mWordFavourite = new ArrayList<String>();
        }

        Log.d(FAVOURITE_TAG, "mWordFavourite = " + mWordFavourite.size());
        mLSTFavourite = (ListView) findViewById(R.id.lstFavourite);

        ImageButton btnClear = (ImageButton) findViewById(R.id.btnClear);
        ImageButton btnBackToContent = (ImageButton) findViewById(R.id.btnBackToContent);

        if (lstDict == null) {
            lstDict = new ArrayList<String>();
            lstId = new ArrayList<Integer>();
            aptList = new ArrayAdapter<String>(getApplicationContext(), R.layout.customlist);
        }
        lstDict.clear();
        lstId.clear();
        aptList.clear();

        if (mWordFavourite != null && mWordFavourite.size() > 0) {
            try {
                for (int i = 0; i < mWordFavourite.size(); i++) {
                    Log.i(FAVOURITE_TAG, "item = " + mWordFavourite.get(i));
                    String arrPart[] = mWordFavourite.get(i).split("::");
                    if (arrPart.length == 3) {
                        Log.i(CONTENT_TAG, "loaded content " + arrPart.length + ", wordId = " + arrPart[1]);
                        // Log.i(CONTENT_TAG, "loaded 0");
                        lstDict.add(i, arrPart[0]);
                        // Log.i(CONTENT_TAG, "loaded 1");
                        lstId.add(i, Integer.parseInt(arrPart[1]));
                        // Log.i(CONTENT_TAG, "loaded 2");
                        aptList.add(arrPart[2]);
                    } else {
                        Log.i(FAVOURITE_TAG, "Wrong entry: " + mWordFavourite.get(i));
                    }
                }
            } catch (Exception ex) {
                Log.i(FAVOURITE_TAG, "Wrong entry found!");
            }
        }
        // Log.i(CONTENT_TAG,"Adapter size = " + aptList.getCount());
        // assign result return
        mLSTFavourite.setAdapter(aptList);
        mLSTFavourite.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                    public void onItemClick(AdapterView<?> arg0, View v, int arg2, long arg3) {
                        // mEDWord.setText(mAdapter.getItem(arg2));
                        Intent i = new Intent();
                        i.putExtra("dict", lstDict.get(arg2));
                        i.putExtra("wordId", lstId.get(arg2));
                        setResult(RESULT_OK, i);
                        finish();
                    }
                });
        btnClear.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                mWordFavourite.clear();
                aptList.clear();
                mLSTFavourite.setAdapter(aptList);
                SharedPreferences.Editor editor = prefs.edit();
                editor.putString("favourite", "");
                editor.commit();
                setResult(RESULT_OK);
                finish();
            }
        });

        btnBackToContent.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                setResult(RESULT_CANCELED);
                finish();
            }
        });
    }
}

The Favourite content is successfully loaded. The favourite words are listed in the webview. But the problem is that it only shows the definition of the latest word added to the Favourite regardless of what word is chosen. For example:

word1
word2
word3

Despite word1 and/or word2 is selected for meaning, the definition of the last word, which is word3, is always shown. My purpose is to display the definition of word1 when word1 is selected, and the definition of word2 when word2 is selected, and so on and so forth. I save my dictionary data in SQLite database.

Can anybody there help to solve this problem.

How to&Answers:

I think the problem comes from this line

            mWordFavourite = new ArrayList<String>(Arrays.asList(strFavourite.split(",")));

where you create a new ArrayList <string> object every time but you should append to it?
& get the last one otherwise you should put it in one variable

If you are checking if its size() >0

But each time you create a new object not appending to it

Maybe I am wrong!

Answer:

http://developer.android.com/reference/android/webkit/WebView.html

please refer above link for more infomations