Array Madness Extra Credit in Android Track

Question

Can anyone assist me in actually completing this objective. I want to loop through an array of strings and print that number to the text view each time i press the button. The first array should increment by one going forwards and the second array should do the opposite. Thanks in advance! Here is my code:

package com.arkman.arraymadness;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;


public class ArrayMadnessActivity extends ActionBarActivity {

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

        final TextView firstView = (TextView) findViewById(R.id.forwardsArrayView);
        final TextView secondView = (TextView) findViewById(R.id.backwardsArrayView);

        final Button button = (Button) findViewById(R.id.myButton);

        final View.OnClickListener listener = new View.OnClickListener() {
            public void onClick(View v) {

                String[] firstTvArray = {"1", "2", "3", "4", "5"};
                String[] secondTvArray = {"5", "4", "3", "2", "1"};
                String firstLoop = "";
                String secondLoop="";

                for(String i:firstTvArray){  

                    // I have trouble here

                    firstLoop = i;
                    firstView.setText(firstLoop);


                }

            }

        };

        button.setOnClickListener(listener);


    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_array_madness, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

Answer 1 · 2015-01-12T12:40:00Z

January 12, 2015 12:40pm

From what I understand when you press the button, firstTvArray should print the elements from left to right i.e. in increasing index and secondTvArray from right to left in decreasing index. Is that correct?

You could do something like this I suppose

for(String i:firstTvArray){  
                    firstLoop = i;
                    firstView.setText(firstLoop);
}

for (int i = secondTvArray.length-1; i >= 0; i--)
{
     secondLoop = secondTvArray[i];
     secondView.setText(secondLoop);
}

Hope this helps

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Aaron Arkie

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Array Madness Extra Credit in Android Track

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Gunjeet Hattar

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Aaron Arkie

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