Apps Need Help Printing to TextView

IIMON · Jan 4, 2016

I'm extremely new to Java, but I still decided to make an android game.
It's a decision maker; you can toss a coin, roll a die, or....something else I'm planning

Anyways, I'm having trouble with printing some text to a TextView. All I want to happen is that when a random number is rolled, it will either display "Heads" or "Tails."

This is all I've come up with, but every time I attempt to run it I'm getting a fatal error and the app closes.

Java:

package com.me.koteg.dmaker;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

import java.util.Random;

public class MainActivity extends AppCompatActivity {

    [USER=1021285]@override[/USER]
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void generate(View view, TextView rd) {
        Random rand = new Random();

        int number = rand.nextInt(10);

        if (number >= 5)
            rd.setText("Heads");

        if (number < 5 )
            rd.setText("Tails");

        TextView myText = (TextView)findViewById(R.id.txtDisplay);
        String myString = String.valueOf(rd);
        myText.setText(myString);

    }
}

Any help would be appreciated!

EDIT: Her'es the stack trace from the Logcat:

Code:

01-05 07:34:50.474 16225-16225/com.me.koteg.dmaker I/art: Late-enabling -Xcheck:jni
01-05 07:34:50.511 16225-16231/com.me.koteg.dmaker I/art: Debugger is no longer active
01-05 07:34:50.512 16225-16225/com.me.koteg.dmaker W/System: ClassLoader referenced unknown path: /data/app/com.me.koteg.dmaker-2/lib/arm
01-05 07:34:50.617 16225-16246/com.me.koteg.dmaker D/OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: true
01-05 07:34:50.689 16225-16246/com.me.koteg.dmaker I/Adreno-EGL: <qeglDrvAPI_eglInitialize:379>: QUALCOMM Build: 10/21/15, 369a2ea, I96aee987eb
01-05 07:34:50.705 16225-16246/com.me.koteg.dmaker I/OpenGLRenderer: Initialized EGL, version 1.4
01-05 07:34:58.461 16225-16225/com.me.koteg.dmaker I/System.out: Tails
01-05 07:35:02.857 16225-16225/com.me.koteg.dmaker I/System.out: Tails
01-05 07:35:03.799 16225-16225/com.me.koteg.dmaker I/System.out: Tails
01-05 07:35:04.624 16225-16225/com.me.koteg.dmaker I/System.out: Tails
01-05 07:35:05.008 16225-16225/com.me.koteg.dmaker I/System.out: Tails
01-05 07:35:05.383 16225-16225/com.me.koteg.dmaker I/System.out: Tails
01-05 07:35:05.792 16225-16225/com.me.koteg.dmaker I/System.out: Heads
01-05 07:35:06.159 16225-16225/com.me.koteg.dmaker I/System.out: Tails
01-05 07:35:06.359 16225-16225/com.me.koteg.dmaker I/System.out: Tails
01-05 07:35:06.559 16225-16225/com.me.koteg.dmaker I/System.out: Tails
01-05 07:35:06.752 16225-16225/com.me.koteg.dmaker I/System.out: Heads
01-05 07:35:06.943 16225-16225/com.me.koteg.dmaker I/System.out: Heads
01-05 07:35:07.134 16225-16225/com.me.koteg.dmaker I/System.out: Tails
01-05 07:35:07.334 16225-16225/com.me.koteg.dmaker I/System.out: Tails
01-05 07:35:10.525 16225-16225/com.me.koteg.dmaker I/System.out: Heads
01-05 07:35:10.985 16225-16225/com.me.koteg.dmaker I/System.out: Tails
01-05 07:35:11.343 16225-16225/com.me.koteg.dmaker I/System.out: Heads
01-05 07:35:11.767 16225-16225/com.me.koteg.dmaker I/System.out: Heads
01-05 07:35:12.193 16225-16225/com.me.koteg.dmaker I/System.out: Tails
01-05 07:35:12.543 16225-16225/com.me.koteg.dmaker I/System.out: Tails
01-05 07:35:12.943 16225-16225/com.me.koteg.dmaker I/System.out: Heads
01-05 07:35:13.378 16225-16225/com.me.koteg.dmaker I/System.out: Heads

Also I changed the code a bit, but it still I still have no idea how to make it go to the TextView...

Java:

package com.me.koteg.dmaker;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

import java.util.Random;

public class MainActivity extends AppCompatActivity {

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

    public void generate(View view) {
        Random rand = new Random();

        int number = rand.nextInt(10);

        if (number >= 5)
            System.out.println("Heads");

        if (number < 5 )
            System.out.println("Tails");




    }

}

Robpuk38 · Jan 4, 2016

Code:

package com.example.roll;







import java.util.Random;




import android.app.Activity;

import android.os.Bundle;

import android.os.Handler;

import android.util.Log;

import android.view.View;

import android.widget.TextView;







public class MainActivity extends Activity {




    private static final String CONSOLE_TRACE_LOG= "Console-Trace-Log";




    Random rand = null;










    //roll dice only 12 if 2 dice? 6 options each dice

    int rolldice = 0;







     TextView myText = null;

     String myString = "null";

 

 




    View view = null;




    private Handler myhandler = new Handler();

    int update =0;




    [USER=1021285]@override[/USER]

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

    

        myText = (TextView)findViewById(R.id.roll);

        myString = String.valueOf(rolldice);

        myText.setText(myString);

    

         myhandler.post(mUpdate);




}







    private Runnable mUpdate = new Runnable()

            {

        public void run()

        {

        

            update++;

        

            if(update == 3)

            {

                //will test it to see if it works here let the code do the dice roll for me.

                randomRoll();

            }

        

            if(update == 8 )

            {

                randomRoll();

            

            

                //will reset to make it go quicker then waiting 100 seconds

            

                update = 0;

            }

        

            Log.i(CONSOLE_TRACE_LOG, "Update: "+update );

        

            if (rolldice >= 5)

             {

                myText.setText("Heads");

                Log.i(CONSOLE_TRACE_LOG, "Heads: "+rolldice );

            

             }

         




             if (rolldice < 5 )

             {

                 myText.setText("Tails");

                 Log.i(CONSOLE_TRACE_LOG, "Tails: "+rolldice );

             

             }

        

            //A quick way to update using 100 layers before resets, I use it as the brain

            if(update > 100)

            {

                update = 0;

            }

            myhandler.postDelayed(getmUpdate(), 1000);

        

        }

    

    

    };




    public Runnable getmUpdate() {

        return mUpdate;

    }




    public void setmUpdate(Runnable mUpdate) {

        this.mUpdate = mUpdate;

    }




    public void randomRoll()

    {

        rand = new Random();

    

        rolldice = rand.nextInt(10);

    }







}

IIMON · Jan 4, 2016

Robpuk38 said:
Ill help that seems fun.

Help with the CODE

Robpuk38 · Jan 4, 2016

that's my thought on it! I did test it. but that's how about I would go about it. some thing like that.

it works did that help you any?

IIMON · Jan 4, 2016

Robpuk38 said:
that's my thought on it! I did test it. but that's how about I would go about it. some thing like that.

it works did that help you any?

Didn't work...

Deleted User · Jan 5, 2016

OP, please include the stack trace from your Logcat view. Then we can diagnose the problem.
Also please put your code in a code insert block. It's hard to read. Thanks.

IIMON · Jan 5, 2016

LV426 said:
OP, please include the stack trace from your Logcat view. Then we can diagnose the problem.
Also please put your code in a code insert block. It's hard to read. Thanks.

Uhhh, how do you put it in a code block? I only joined yesterday an don't really know anything....

Deleted User · Jan 5, 2016

When composing your reply, see the icons at the top of the box. Click on the insert icon, and select 'code'

IIMON · Jan 5, 2016

LV426 said:
OP, please include the stack trace from your Logcat view. Then we can diagnose the problem.
Also please put your code in a code insert block. It's hard to read. Thanks.

Never mind, I found out

Deleted User · Jan 5, 2016

IIMON said:
Never mind, I found out

Much better, but your Logcat output doesn't include the stack trace for the exception you are (presumably) getting.

IIMON · Jan 5, 2016

LV426 said:
Much better, but your Logcat output doesn't include the stack trace for the exception you are (presumably) getting.

That's due to the fact that I removed the setText and all that.

Deleted User · Jan 5, 2016

So does your app work ok now?

Robpuk38 · Jan 5, 2016

IIMON said:
Didn't work...

No my coded worked yours doesn't

IIMON · Jan 5, 2016

Robpuk38 said:
No my coded worked yours doesn't

I used your code...
And it didn't

Deleted User · Jan 5, 2016

If your application closed unexpectedly there would be an exception in the Logcat. What is it?

IIMON · Jan 5, 2016

LV426 said:
If your application closed unexpectedly there would be an exception in the Logcat. What is it?

Something about the main method not being detected or something

Robpuk38 · Jan 5, 2016

I'm not real sure what the issues is but I do know it was a real pain getting all set up when I first started downloading all the tools needed to create an app. youtube helped a lot getting set up and started! maybe something is missing on your end with the compiler or something how ever I made a video to show you on my end the code works.

Apps Need Help Printing to TextView

IIMON

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Robpuk38

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IIMON

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Robpuk38

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IIMON

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Deleted User

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IIMON

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IIMON

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IIMON

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Robpuk38

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IIMON

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IIMON

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