JAVA Learning Group

[Bearbear76]

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.jasoftware.justanyonecomp/com.jasoftware.justanyonecomp.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.media.MediaPlayer.start()' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2321)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2381)
at android.app.ActivityThread.access$800(ActivityThread.java:147)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1286)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5260)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:678)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.media.MediaPlayer.start()' on a null object reference
at com.jasoftware.justanyonecomp.MainActivity.initializeLogic(MainActivity.java:82)
at com.jasoftware.justanyonecomp.MainActivity.onCreate(MainActivity.java:47)
at android.app.Activity.performCreate(Activity.java:5975)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2274)
... 10 more
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.media.MediaPlayer.start()' on a null object reference
at com.jasoftware.justanyonecomp.MainActivity.initializeLogic(MainActivity.java:82)
at com.jasoftware.justanyonecomp.MainActivity.onCreate(MainActivity.java:47)
at android.app.Activity.performCreate(Activity.java:5975)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2274)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2381)
at android.app.ActivityThread.access$800(ActivityThread.java:147)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1286)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5260)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:678)

[JustAnyone]

Where is my rope at?

[Bearbear76]

Maybe ask lobby

[JustAnyone]

https://drive.google.com/file/d/0B32tv5 ... p=drivesdk
Last try. If this Doesn't work. Wait for 1.2

[JustAnyone]

Does this work?

[Bearbear76]

Yeah

[Lobby]

NullPointerExceptions are the main reason for crashes in Java programs

[JustAnyone]

Version and device language checker.

[Ahmad Nur Aizat]

The copyright info format is supposed to be like this:

©JustAnyone 2017

No need to put long words like Copyright, cause you already had the symbol

[JustAnyone]

The copyright info format is supposed to be like this:

©JustAnyone 2017

No need to put long words like Copyright, cause you already had the symbol

Ok.

[JustAnyone]

I need a bug spray.

[Ahmad Nur Aizat]

Most of grocery stores have aerosols....

But I recommend you to buy the "child-friendly" ones

;P

[JustAnyone]

Permission to call is only used by Virtual JustAnyone if you type "kill kamile" or "kill auguste" it will dial their friend's number. (Gonna change to 911(maybe(idk))).

[CommanderABab]

DO NOT change them to 911. That is a lawbreaking offense!

[JustAnyone]

Actually I think I have a better idea. Make them listen to music for 10 minutes on loop!

[Lobby]

In case you've ever wondered how a name generator might work:

Code: Select all

import java.util.Random;

/**
 * Created by Lobby on 10.04.2015.
 */
public class NameGenerator {

    private final static char[] CHARS = {'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'};

    private final static boolean[] IS_VOCAL = {true, false, false, false, true, false, false, false, true, false, false, false, false, false, true, false, false, false, false, false, true, false, false, false, false, false};

    private final static float[] P = {0.08f, 0.015f, 0.027f, 0.043f, 0.127f, 0.022f, 0.02f, 0.06f, 0.07f, 0.015f, 0.077f, 0.04f,
            0.024f, 0.067f, 0.075f, 0.019f, 0.0009f, 0.06f, 0.063f, 0.09f, 0.027f, 0.098f, 0.024f, 0.015f, 0.02f, 0.00074f};

    private final static float[] FIRST_P = {0.11f, 0.047f, 0.035f, 0.027f, 0.02f, 0.038f, 0.02f, 0.07f, 0.06f, 0.006f, 0.006f, 0.027f, 0.044f,
            0.024f, 0.063f, 0.025f, 0.0017f, 0.017f, 0.078f, 0.17f, 0.015f, 0.006f, 0.068f, 0.0001f, 0.016f, 0.003f};

    private Random rnd;

    public NameGenerator() {
        rnd = new Random();
    }

    public String generate() {
        int length = rnd.nextInt(5) + 3;

        int index = getProbIndex(i -> FIRST_P[i], CHARS.length);

        StringBuilder builder = new StringBuilder(length);
        builder.append(Character.toUpperCase(CHARS[index]));

        final int[] lastIndex = new int[] {index};
        final int[] lastLastIndex = new int[] {index};

        for (int i = 1; i < length; i++) {
            lastLastIndex[0] = lastIndex[0];
            lastIndex[0] = index;
            index = getProbIndex(idx -> {
                    if ((IS_VOCAL[idx] != IS_VOCAL[lastIndex[0]] || IS_VOCAL[idx]) &&
                            lastLastIndex[0] != idx) {
                        return P[idx];
                    }
                    return 0;
            }, CHARS.length);
            builder.append(CHARS[index]);
        }

        return builder.toString();
    }

    private int getProbIndex(ProbFilter filter, int length) {
        float sum = 0.f;

        for (int i = 0; i < length; i++) {
            sum += filter.prob(i);
        }

        float v = rnd.nextFloat() * sum;

        sum = 0.f;
        for (int i = 0; i < length; i++) {
            sum += filter.prob(i);
            if (sum > v) return i;
        }

        return length - 1;
    }

    interface ProbFilter {
        float prob(int i);
    }

    public static void main(String[] args) {
        NameGenerator nameGenerator = new NameGenerator();
        System.out.println(nameGenerator.generate());
    }
}

It heavily relays on probabilities for specific word sequences in English language.

[JustAnyone]

How do I make app save files to external storage from assets folder?

[Lobby]

Create an InputStream from the file you want to write out and write bytes out manually. See here. The Android API doesn't help you much here.

[JustAnyone]

Finally found this topic.
I present you "Plugin Creator"!
*Poof*
I will help you create simple plugins without any knowledge.
NOTE: This is still testing version!
1.0

pluginmaker.apk

Plugin Maker 1.0

(2.36 MiB) Downloaded 86 times

[Josh]

Finally found this topic.
I present you "Plugin Creator"!
*Poof*
I will help you create simple plugins without any knowledge.
NOTE: This is still testing version!
1.0
pluginmaker.apk

That's really cool, I hope you can keep improving the app!