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Java

Build a simple Android app.......

Hello - I try to follow but when he checks and runs the app its ok but I just get errors.

Is their a complete solution people can reference.?

Since you can not see the complete content of his copy of the file, it is impossible for me to find my errors.

FunFactsActivity.Java

package com.websitepromoters.funfacts;

import android.content.DialogInterface; 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;

import java.util.Random;

public class FunFactsActivity extends ActionBarActivity {

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

    // Declare our view variables and assign the views rom the layout file.
    final TextView factLabel = (TextView)findViewById(R.id.factTextView);
    Button showFactButton = (Button)findViewById (R.id.showFactButton);
    View.OnClickListener listener = new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            // The button was clicked so update the fact label with a new fact.
            String fact = "";
            // Randomly select a fact.
            Random randomGenerator = new Random(); // Construct a new random generator.
            int randomNumber = randomGenerator.nextInt(3);

            /* Convert the randomNumber to a random text fact
             *0 = Ants stretch when they wake up in the morning.
             *1 = Ostriches can run faster than horses.
             *2 = Olympic gold medals are actually made mostly of silver.
             */

            // if randomNumber equals 0 then
            if (randomNumber == 0) {
                // set fact equal to ant fact
                fact = "Ants stretch when they wake up in the morning.";
                }

            else if (randomNumber == 1) {
                    // set fact equal to ant fact
                    fact = "Ostriches can run faster than horses.";
                }
            else if (randomNumber == 2) {
                    // set fact equal to ant fact
                    fact = "Olympic gold medals are actually made mostly of silver.";
                }
            else {
                    fact = "Sorry, there was an error!";
                        }

            }

            // if random Number equals 1 then
            // set fact equal to Ostriches fact
            // if randomNumber equals to 2 then
            // set fact equal to olympic fact


            // Update the label with our random fact.
            factLabel.setText(fact);



   };
    showFactButton.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_fun_facts, 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);
}

}

2 Answers

Dan Johnson
Dan Johnson
40,532 Points

Below each video you can select the "Downloads" tab and that should contain a link to the complete project files up to that point.

Thanks. There seem to be files for the Android exercises.

I wish they were available for the Java exercises in the Android Track. Having something to look through can save many hours of frustration. Thanks again.