Forgot to write a question. Obvious however, does anyone know why I get
this error?
On Thursday, May 1, 2014 5:31:55 PM UTC+2, Sidharta Prahladsingh wrote:
>
> Hello,
>
> I am busy with a Bachelor project on my University where we want to drive
> a 32x32 LED screen. Normally this is easy to do with the IOIO-OTG but we
> want to make our own system to drive the LEDs, but want to use the IOIO-OTG
> to only stream the RGB data in bit streams to our own system.
>
> I am trying to write an app that takes a picture out of your phone,
> changes it to 32x32 bit, analyses the Colors per pixel, converts the color
> levels (256 possible levels) to 8 bits and then finally making a very long
> array (length = 32*32*8bits) serving as a bitstream for R,G and B which I
> want to send via 3 pins through the IOIO-OTG.
>
> I am having quite some problem with this though. The app itself work just
> fine and I do get my 3 very long arrays without null entries. The only
> problem is that the moment I want to initialize the pins using for example
> pin2 = ioio_openDirectOutput(2,false);, I get a Null Pointer Exception for
> some reason.
>
> Main code:
>
>> package com.example.imagetest2;
>> import java.io.FileNotFoundException;
>> import ioio.lib.spi.Log;
>> import ioio.lib.util.BaseIOIOLooper;
>> import ioio.lib.api.DigitalOutput;
>> import ioio.lib.api.exception.ConnectionLostException;
>> import ioio.lib.util.IOIOLooper;
>> import ioio.lib.util.android.IOIOActivity;
>> import android.view.Menu;
>> import android.view.View;
>> import android.view.View.OnClickListener;
>> import android.content.Intent;
>> import android.graphics.Bitmap;
>> import android.graphics.BitmapFactory;
>> import android.net.Uri;
>> import android.os.Bundle;
>> import android.widget.Button;
>> import android.widget.ImageView;
>> import android.widget.TextView;
>>
>> public class MainActivity extends IOIOActivity implements OnClickListener
>> {
>>
>> private Button shareButton;
>> private ImageView imagethingy;
>> private Bitmap bitmapb;
>> private TextView color;
>> private TextView colorint;
>> private TextView status;
>> private static int picw = 32;
>> private static int pich = 32;
>> public static String[] sig2bitR = new String[picw * pich * 8];
>> public static String[] sig2bitG = new String[picw * pich * 8];
>> public static String[] sig2bitB = new String[picw * pich * 8];
>> private String[] Red = new String[pich * picw];
>> private String[] Green = new String[pich * picw];
>> private String[] Blue = new String[pich * picw];
>>
>> @Override
>> protected void onCreate(Bundle savedInstanceState) {
>> super.onCreate(savedInstanceState);
>> setContentView(R.layout.fragment_main);
>> shareButton = (Button) findViewById(R.id.share_button);
>> shareButton.setOnClickListener(this);
>> imagethingy = (ImageView) findViewById(R.id.imageView1);
>> color = (TextView) findViewById(R.id.textView2);
>> colorint = (TextView) findViewById(R.id.textView3);
>> status = (TextView) findViewById(R.id.textView1);
>> }
>> @Override
>> public void onClick(View v) {
>> Intent intent = new Intent(Intent.ACTION_PICK,
>> android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
>> startActivityForResult(intent, 0);
>> }
>> @Override
>> protected void onActivityResult(int requestCode, int resultCode, Intent
>> data) {
>> super.onActivityResult(requestCode, resultCode, data);
>> if (resultCode == RESULT_OK) {
>> Uri targetUri = data.getData();
>> // textTargetUri.setText(targetUri.toString());
>> Bitmap bitmapa;
>> try {
>> bitmapa = BitmapFactory.decodeStream(getContentResolver()
>> .openInputStream(targetUri));
>> bitmapb = Bitmap.createScaledBitmap(bitmapa, 32, 32, false);
>> imagethingy.setImageBitmap(bitmapb);
>> int[] pix = new int[picw * pich];
>> bitmapb.getPixels(pix, 0, picw, 0, 0, picw, pich);
>> for (int y = 0; y < pich; y++) {
>> for (int x = 0; x < picw; x++) {
>> int index = y * picw + x;
>> Red[index] = Integer
>> .toBinaryString((pix[index] >> 16) & 0xff); // bitwise
>> // shifting
>> Green[index] = Integer
>> .toBinaryString((pix[index] >> 8) & 0xff);
>> Blue[index] = Integer.toBinaryString(pix[index] & 0xff);
>> if (Red[index].length() != 8) {
>> Red[index] = String.format("%08d",
>> Integer.parseInt(Red[index]));
>> }
>> if (Green[index].length() != 8) {
>> Green[index] = String.format("%08d",
>> Integer.parseInt(Green[index]));
>> }
>> if (Blue[index].length() != 8) {
>> Blue[index] = String.format("%08d",
>> Integer.parseInt(Blue[index]));
>> }
>> }
>> }
>> for (int i = 0; i < Red.length; i++) {
>> String[] s2r = Red[i].split("");
>> String[] s2g = Green[i].split("");
>> String[] s2b = Blue[i].split("");
>> System.arraycopy(s2r, 1, sig2bitR, 8 * i, 8);
>> System.arraycopy(s2g, 1, sig2bitG, 8 * i, 8);
>> System.arraycopy(s2b, 1, sig2bitB, 8 * i, 8);
>> }
>> } catch (FileNotFoundException e) {
>> // TODO Auto-generated catch block
>> e.printStackTrace();
>> }
>> Looper looper = new Looper();
>> try {
>> looper.setup();
>> looper.loop();
>> } catch (ConnectionLostException e) {
>> // TODO Auto-generated catch block
>> e.printStackTrace();
>> }
>> }
>> }
>>
>> protected IOIOLooper createIOIOLooper() {
>> return new Looper();
>> }
>> }
>
>
>
> Looper code:
>>
>> package com.example.imagetest2;
>> import ioio.lib.api.DigitalOutput;
>> import ioio.lib.api.exception.ConnectionLostException;
>> import ioio.lib.spi.Log;
>> import ioio.lib.util.BaseIOIOLooper;
>> import ioio.lib.util.IOIOLooper;
>>
>>
>> class Looper extends BaseIOIOLooper {
>> private DigitalOutput pin2;
>> private DigitalOutput pin4;
>> private DigitalOutput pin6;
>> private DigitalOutput led_;
>> private String[] sig2bitR = MainActivity.sig2bitR;
>> private String[] sig2bitG = MainActivity.sig2bitG;
>> private String[] sig2bitB = MainActivity.sig2bitB;
>> private boolean check =false;
>> private int counter;
>>
>> @Override
>> protected void setup() throws ConnectionLostException {
>> pin2 = ioio_.openDigitalOutput(2, false);
>> pin4 = ioio_.openDigitalOutput(4, false);
>> pin6 = ioio_.openDigitalOutput(6, false);
>> }
>> /**
>> * Called repetitively while the IOIO is connected.
>> *
>> * @throws ConnectionLostException
>> * When IOIO connection is lost.
>> *
>> * @see ioio.lib.util.AbstractIOIOActivity.IOIOThread#loop()
>> */
>> @Override
>> public void loop() throws ConnectionLostException {
>>
>> for (int j = 0; j < sig2bitR.length; j++) {
>> if (sig2bitR[j] == null | sig2bitG[j] == null
>> | sig2bitB[j] == null) {
>> counter = counter + 1;
>> }
>> }
>> Log.d("ImageTest", Integer.toString(counter));
>> Log.d("ImageTest", sig2bitR[1]);
>> for (int j = 0; j<sig2bitR.length;j++){
>>
>>
>> if (sig2bitR[j]=="0"){
>> pin2.write(false);
>> }
>> else{
>> pin2.write(true);
>> }
>> if (sig2bitG[j]=="0"){
>> pin4.write(false);
>> }
>> else{
>> pin4.write(true);
>> }
>> if (sig2bitB[j]=="0"){
>> pin6.write(false);
>> }
>> else{
>> pin6.write(true);
>> }
>>
>> }
>>
>> }
>>
>>
>> }
>
>
> Full error log:
>
>> 05-01 17:13:23.350: E/AndroidRuntime(12620): FATAL EXCEPTION: main
>> 05-01 17:13:23.350: E/AndroidRuntime(12620): Process:
>> com.example.imagetest2, PID: 12620
>> 05-01 17:13:23.350: E/AndroidRuntime(12620): java.lang.RuntimeException:
>> Failure delivering result ResultInfo{who=null, request=0, result=-1,
>> data=Intent { act=com.htc.HTCAlbum.action.ITEM_PICKER_FROM_COLLECTIONS
>> dat=content: typ=image/jpeg (has extras) }} to activity
>> {com.example.imagetest2/com.example.imagetest2.MainActivity}:
>> java.lang.NullPointerException
>> 05-01 17:13:23.350: E/AndroidRuntime(12620): at
>> android.app.ActivityThread.deliverResults(ActivityThread.java:3942)
>> 05-01 17:13:23.350: E/AndroidRuntime(12620): at
>> android.app.ActivityThread.handleSendResult(ActivityThread.java:3992)
>> 05-01 17:13:23.350: E/AndroidRuntime(12620): at
>> android.app.ActivityThread.access$1300(ActivityThread.java:156)
>> 05-01 17:13:23.350: E/AndroidRuntime(12620): at
>> android.app.ActivityThread$H.handleMessage(ActivityThread.java:1403)
>> 05-01 17:13:23.350: E/AndroidRuntime(12620): at
>> android.os.Handler.dispatchMessage(Handler.java:102)
>> 05-01 17:13:23.350: E/AndroidRuntime(12620): at
>> android.os.Looper.loop(Looper.java:157)
>> 05-01 17:13:23.350: E/AndroidRuntime(12620): at
>> android.app.ActivityThread.main(ActivityThread.java:5872)
>> 05-01 17:13:23.350: E/AndroidRuntime(12620): at
>> java.lang.reflect.Method.invokeNative(Native Method)
>> 05-01 17:13:23.350: E/AndroidRuntime(12620): at
>> java.lang.reflect.Method.invoke(Method.java:515)
>> 05-01 17:13:23.350: E/AndroidRuntime(12620): at
>> com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1069)
>> 05-01 17:13:23.350: E/AndroidRuntime(12620): at
>> com.android.internal.os.ZygoteInit.main(ZygoteInit.java:885)
>> 05-01 17:13:23.350: E/AndroidRuntime(12620): at
>> dalvik.system.NativeStart.main(Native Method)
>> 05-01 17:13:23.350: E/AndroidRuntime(12620): Caused by:
>> java.lang.NullPointerException
>> 05-01 17:13:23.350: E/AndroidRuntime(12620): at
>> com.example.imagetest2.Looper.setup(Looper.java:34)
>> 05-01 17:13:23.350: E/AndroidRuntime(12620): at
>> com.example.imagetest2.MainActivity.onActivityResult(MainActivity.java:151)
>> 05-01 17:13:23.350: E/AndroidRuntime(12620): at
>> android.app.Activity.dispatchActivityResult(Activity.java:5535)
>> 05-01 17:13:23.350: E/AndroidRuntime(12620): at
>> android.app.ActivityThread.deliverResults(ActivityThread.java:3938)
>> 05-01 17:13:23.350: E/AndroidRuntime(12620): ... 11 more
>
>
>
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