NumbersActivity.java

package com.example.android.miwok;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ListView;

import java.util.ArrayList;

public class NumbersActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_numbers);

        // Create a list of words
        ArrayList<Word> words = new ArrayList<Word>();
        words.add(new Word("one", "lutti"));
        words.add(new Word("two", "otiiko"));
        words.add(new Word("three", "tolookosu"));
        words.add(new Word("four", "oyyisa"));
        words.add(new Word("five", "massokka"));
        words.add(new Word("six", "temmokka"));
        words.add(new Word("seven", "kenekaku"));
        words.add(new Word("eight", "kawinta"));
        words.add(new Word("nine", "wo’e"));
        words.add(new Word("ten", "na’aacha"));

        // Create an {@link WordAdapter}, whose data source is a list of {@link Word}s. The
        // adapter knows how to create list items for each item in the list.
        WordAdapter adapter = new WordAdapter(this, words);

        // Find the {@link ListView} object in the view hierarchy of the {@link Activity}.
        // There should be a {@link ListView} with the view ID called list, which is declared in the
        // activity_numbers.xml layout file.
        ListView listView = (ListView) findViewById(R.id.list);

        // Make the {@link ListView} use the {@link WordAdapter} we created above, so that the
        // {@link ListView} will display list items for each {@link Word} in the list.
        listView.setAdapter(adapter);
    }
}

its works so fine

`package com.example.android.miwok;

import android.app.Activity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;

import java.util.ArrayList;

/*

• {@link WordAdapter} is an {@link ArrayAdapter} that can provide the layout for each list
• based on a data source, which is a list of {@link words} objects.
• */

public class WordAdapter extends ArrayAdapter {

/**
 * This is our own custom constructor (it doesn't mirror a superclass constructor).
 * The context is used to inflate the layout file, and the list is the data we want
 * to populate into the lists.
 *
 * @param context The current context. Used to inflate the layout file.
 * @param words   A List of AndroidFlavor objects to display in a list
 */

public WordAdapter(@NonNull Activity context, ArrayList<Word> words) {
    // Here, we initialize the ArrayAdapter's internal storage for the context and the list.
    // the second argument is used when the ArrayAdapter is populating a single TextView.
    // Because this is a custom adapter for two TextViews and an ImageView, the adapter is not
    // going to use this second argument, so it can be any value. Here, we used 0.

    super(context, 0, words);
}

/**
 * Provides a view for an AdapterView (ListView, GridView, etc.)
 *
 * @param position    The position in the list of data that should be displayed in the
 *                    list item view.
 * @param convertView The recycled view to populate.
 * @param parent      The parent ViewGroup that is used for inflation.
 * @return The View for the position in the AdapterView.
 */
@NonNull
@Override
public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
    // Check if the existing view is being reused, otherwise inflate the view

    View listWordsView = convertView;
    if (listWordsView == null) {
        listWordsView = LayoutInflater.from(getContext()).inflate(R.layout.list_item, parent, false);
    }

    // Get the {@link AndroidFlavor} object located at this position in the list
    Word currentWord = getItem(position);

    // Find the TextView in the list_item.xml layout with the ID default_text_view
    TextView englishWord = listWordsView.findViewById(R.id.default_text_view);

    // Get the english default word from the current Word object  and
    // set this text on the englishWord TextView
    englishWord.setText(currentWord.getDefaultTranslation());

    // Find the TextView in the list_item.xml layout with the ID version_number
    TextView miwokWord = listWordsView.findViewById(R.id.miwok_text_view);

    // Get the version number from the current AndroidFlavor object and
    // set this text on the number TextView
    miwokWord.setText(currentWord.getMiwokTranslation());

// we will need it in the future in sha allah ;)
// Find the ImageView in the list_item.xml layout with the ID list_item_icon
// ImageView iconView = (ImageView) listItemView.findViewById(R.id.list_item_icon);
//Get the image resource ID from the current AndroidFlavor object and
//set the image to iconView
// iconView.setImageResource(currentAndroidFlavor.getImageResourceId());

    return listWordsView;
}

}`

I have copied the same code but the app is being crashed whenever I click on numbers. Can u pls help me out ?

It is because you might not have made following changes to NumberActivity.java
WordAdapter wordsAdapter = new WordAdapter(this, words);
ListView numberView = (ListView) findViewById(R.id.number_activity);
numberView.setAdapter(wordsAdapter);

its works so fine

`package com.example.android.miwok;

import android.app.Activity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;

import java.util.ArrayList;

/*

• {@link WordAdapter} is an {@link ArrayAdapter} that can provide the layout for each list
• based on a data source, which is a list of {@link words} objects.
• */

public class WordAdapter extends ArrayAdapter {

/**
 * This is our own custom constructor (it doesn't mirror a superclass constructor).
 * The context is used to inflate the layout file, and the list is the data we want
 * to populate into the lists.
 *
 * @param context The current context. Used to inflate the layout file.
 * @param words   A List of AndroidFlavor objects to display in a list
 */

public WordAdapter(@NonNull Activity context, ArrayList<Word> words) {
    // Here, we initialize the ArrayAdapter's internal storage for the context and the list.
    // the second argument is used when the ArrayAdapter is populating a single TextView.
    // Because this is a custom adapter for two TextViews and an ImageView, the adapter is not
    // going to use this second argument, so it can be any value. Here, we used 0.

    super(context, 0, words);
}

/**
 * Provides a view for an AdapterView (ListView, GridView, etc.)
 *
 * @param position    The position in the list of data that should be displayed in the
 *                    list item view.
 * @param convertView The recycled view to populate.
 * @param parent      The parent ViewGroup that is used for inflation.
 * @return The View for the position in the AdapterView.
 */
@NonNull
@Override
public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
    // Check if the existing view is being reused, otherwise inflate the view

    View listWordsView = convertView;
    if (listWordsView == null) {
        listWordsView = LayoutInflater.from(getContext()).inflate(R.layout.list_item, parent, false);
    }

    // Get the {@link AndroidFlavor} object located at this position in the list
    Word currentWord = getItem(position);

    // Find the TextView in the list_item.xml layout with the ID default_text_view
    TextView englishWord = listWordsView.findViewById(R.id.default_text_view);

    // Get the english default word from the current Word object  and
    // set this text on the englishWord TextView
    englishWord.setText(currentWord.getDefaultTranslation());

    // Find the TextView in the list_item.xml layout with the ID version_number
    TextView miwokWord = listWordsView.findViewById(R.id.miwok_text_view);

    // Get the version number from the current AndroidFlavor object and
    // set this text on the number TextView
    miwokWord.setText(currentWord.getMiwokTranslation());

// we will need it in the future in sha allah ;)
// Find the ImageView in the list_item.xml layout with the ID list_item_icon
// ImageView iconView = (ImageView) listItemView.findViewById(R.id.list_item_icon);
//Get the image resource ID from the current AndroidFlavor object and
//set the image to iconView
// iconView.setImageResource(currentAndroidFlavor.getImageResourceId());

    return listWordsView;
}

}`

This code works fine but with one error in "Word currentWord = (Word) getItem(position); " which is :Incompatible types. Found: 'java.lang.Object', required: 'com.example.miwok.Word' . which can be solved by casting currentWord to 'com.example.miwok.Word'

guys please help here, as im having a problem when implementing the methods "getMiwokTranslation()" and "getDefaultTranslation()", as the program says that it couldn't recognize these two methods ... any idea here ???

WordAdabter.java
package com.example.android.miwok;

import android.app.Activity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import java.util.ArrayList;

public class WordAdabter extends ArrayAdapter {

private static final String Number_TAG = WordAdabter.class.getSimpleName();

/**

• This is our own custom constructor (it doesn't mirror a superclass constructor).
• The context is used to inflate the layout file, and the list is the data we want
• to populate into the lists.
  */
  public WordAdabter(Activity context, ArrayList words) {
  // Here, we initialize the ArrayAdapter's internal storage for the context and the list.
  // the second argument is used when the ArrayAdapter is populating a single TextView.
  // Because this is a custom adapter for two TextViews and an ImageView, the adapter is not
  // going to use this second argument, so it can be any value. Here, we used 0.
  super(context, 0, words);
  }

@OverRide
public View getView(int position,View convertView,ViewGroup parent) {
View listItemView = convertView;
if (listItemView == null) {
listItemView = LayoutInflater.from(getContext()).inflate(R.layout.list_item, parent, false);
}
// Get the {@link AndroidFlavor} object located at this position in the list
Word currentWordNumber = getItem(position);
// Find the TextView in the list_item.xml layout with the ID version_name
TextView nameTextViewMiwokTranslation = listItemView.findViewById(R.id.miwok_text_view);
// Get the miwok word from the current Word object and
// set this text on the miwok TextView
nameTextViewMiwokTranslation.setText(currentWordNumber.getMiwokTranslation());
// Find the TextView in the list_item.xml layout with the ID version_name
TextView nameTextViewMiwoDefault = listItemView.findViewById(R.id.default_text_view);
// Get the default word from the current Word object and
// set this text on the default TextView
nameTextViewMiwoDefault.setText(currentWordNumber.getDefaultTranslation());
return listItemView;
}
}

Word.Java
package com.example.android.miwok;

import android.content.Context;
import android.widget.TextView;

public class Word{
private String mDefaultTranslation;

private String mMiwokTranslation;

public Word(String defaultTranslation,String miwokTranslation){
mDefaultTranslation = defaultTranslation;
mMiwokTranslation= miwokTranslation;

}

/**
 * Get the default Translation of the word
 * @return
 */

public String getDefaultTranslation(){
return mDefaultTranslation;
}

/**
 * Get miwok translation of the word
 * @return
 */

public String getMiwokTranslation(){
return mMiwokTranslation;

}

}

XML list_item

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/default_text_view"
    tools:text="One"

    />

NumberActivtiy.Java
package com.example.android.miwok;

import android.app.Activity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import java.util.ArrayList;

public class WordAdabter extends ArrayAdapter {

private static final String Number_TAG = WordAdabter.class.getSimpleName();

/**

• This is our own custom constructor (it doesn't mirror a superclass constructor).
• The context is used to inflate the layout file, and the list is the data we want
• to populate into the lists.
  */
  public WordAdabter(Activity context, ArrayList words) {
  // Here, we initialize the ArrayAdapter's internal storage for the context and the list.
  // the second argument is used when the ArrayAdapter is populating a single TextView.
  // Because this is a custom adapter for two TextViews and an ImageView, the adapter is not
  // going to use this second argument, so it can be any value. Here, we used 0.
  super(context, 0, words);
  }

@OverRide
public View getView(int position,View convertView,ViewGroup parent) {
View listItemView = convertView;
if (listItemView == null) {
listItemView = LayoutInflater.from(getContext()).inflate(R.layout.list_item, parent, false);
}
// Get the {@link AndroidFlavor} object located at this position in the list
Word currentWordNumber = getItem(position);
// Find the TextView in the list_item.xml layout with the ID version_name
TextView nameTextViewMiwokTranslation = listItemView.findViewById(R.id.miwok_text_view);
// Get the miwok word from the current Word object and
// set this text on the miwok TextView
nameTextViewMiwokTranslation.setText(currentWordNumber.getMiwokTranslation());
// Find the TextView in the list_item.xml layout with the ID version_name
TextView nameTextViewMiwoDefault = listItemView.findViewById(R.id.default_text_view);
// Get the default word from the current Word object and
// set this text on the default TextView
nameTextViewMiwoDefault.setText(currentWordNumber.getDefaultTranslation());
return listItemView;
}
}

So here you can find you Mistake as you know before the code as threaded chain

package com.example.android.miwok;

import android.app.Activity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;

import java.util.ArrayList;

public class WordAdapter extends ArrayAdapter {

private static final String LOG_TAG = WordAdapter.class.getSimpleName();

/**
 * This is our own custom constructor (it doesn't mirror a superclass constructor).
 * The context is used to inflate the layout file, and the list is the data we want
 * to populate into the lists.
 *
 * @param context        The current context. Used to inflate the layout file.
 * @param Word A List of AndroidFlavor objects to display in a list
 */
public WordAdapter(Activity context, ArrayList<Word> Word) {
    // Here, we initialize the ArrayAdapter's internal storage for the context and the list.
    // the second argument is used when the ArrayAdapter is populating a single TextView.
    // Because this is a custom adapter for two TextViews and an ImageView, the adapter is not
    // going to use this second argument, so it can be any value. Here, we used 0.
    super(context, 0, Word);
}

/**
 * Provides a view for an AdapterView (ListView, GridView, etc.)
 *
 * @param position The position in the list of data that should be displayed in the
 *                 list item view.
 * @param convertView The recycled view to populate.
 * @param parent The parent ViewGroup that is used for inflation.
 * @return The View for the position in the AdapterView.
 */
@Override
public View getView(int position, View convertView, ViewGroup parent) {
    // Check if the existing view is being reused, otherwise inflate the view
    View listItemView = convertView;
    if(listItemView == null) {
        listItemView = LayoutInflater.from(getContext()).inflate(
                R.layout.list_item, parent, false);
    }

    // Get the {@link Word} object located at this position in the list
    Word currentWord = getItem(position);

    // Find the TextView Miwok Translation in the list_item.xml layout with the ID miwok_text_view
    TextView miwokTextView = (TextView) listItemView.findViewById(R.id.miwok_text_view);
    // Get the Miwok Word from the current Word object and
    // set this text on the Miwok TextView
    miwokTextView.setText(currentWord.getMiwokTranslation());

    // Find the TextView of Default Translation in the list_item.xml layout with the ID default_text_view
    TextView defaultTextView = (TextView) listItemView.findViewById(R.id.default_text_view);
    // Get the version number from the current Word object and
    // set this text on the Default TextView
    defaultTextView.setText(currentWord.getDefaultTranslation());

    return listItemView;
}

}