Toast in processing

sadam_rana

I want to use toast on a button click how can i do it in java mode and in android mode as well kindly do tell me the way

calsign

Toasts are built into Android - see the relevant API Guidelines. Something like this should do the trick:

void showToast(String message) {
  android.widget.Toast.makeText(getApplicationContext(), message, android.widget.Toast.LENGTH_SHORT).show();
}

Java mode, on the other hand, does not have the same functionality, although there is probably a library (not necessarily a Processing library) that will do the trick.

sadam_rana

kindly tell me the name of the library plz

sadam_rana

i run the code as an example here is my code

import android.widget.Toast;


void setup()
{
  size(displayWidth,displayHeight);
}

void draw()
{
  background(255);
}

void mousePressed()
{
   showToast("Hellow World");
}

void showToast(String message) {
  android.widget.Toast.makeText(getApplicationContext(), message, android.widget.Toast.LENGTH_SHORT).show();
}

but i found error when application run on the screen here are errors

java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
    at android.os.Handler.<init>(Handler.java:205)
    at android.os.Handler.<init>(Handler.java:119)
    at android.widget.Toast$TN.<init>(Toast.java:339)
    at android.widget.Toast.<init>(Toast.java:98)
    at android.widget.Toast.makeText(Toast.java:245)
    at processing.test.toast.toast.showToast(toast.java:40)
    at processing.test.toast.toast.mousePressed(toast.java:36)
    at processing.core.PApplet.mousePressed(Unknown Source)
    at processing.core.PApplet.handleMouseEvent(Unknown Source)
    at processing.core.PApplet.dequeueEvents(Unknown Source)
    at processing.core.PApplet.handleDraw(Unknown Source)
    at processing.core.PGraphicsAndroid2D.requestDraw(Unknown Source)
    at processing.core.PApplet.run(Unknown Source)
    at java.lang.Thread.run(Thread.java:838)
FATAL EXCEPTION: Animation Thread
java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
    at android.os.Handler.<init>(Handler.java:205)
    at android.os.Handler.<init>(Handler.java:119)
    at android.widget.Toast$TN.<init>(Toast.java:339)
    at android.widget.Toast.<init>(Toast.java:98)
    at android.widget.Toast.makeText(Toast.java:245)
    at processing.test.toast.toast.showToast(toast.java:40)
    at processing.test.toast.toast.mousePressed(toast.java:36)
    at processing.core.PApplet.mousePressed(Unknown Source)
    at processing.core.PApplet.handleMouseEvent(Unknown Source)
    at processing.core.PApplet.dequeueEvents(Unknown Source)
    at processing.core.PApplet.handleDraw(Unknown Source)
    at processing.core.PGraphicsAndroid2D.requestDraw(Unknown Source)
    at processing.core.PApplet.run(Unknown Source)
    at java.lang.Thread.run(Thread.java:838)

PhiLho

I don't know Android programming, but the error message seems explicit: "Can't create handler inside thread that has not called Looper.prepare()"

calsign

Oh, right. This code has to be run on the UI thread, like so:

void showToast(final String message) {
  runOnUiThread(new Runnable() {
    public void run() {
      android.widget.Toast.makeText(getApplicationContext(), message, android.widget.Toast.LENGTH_SHORT).show();
    }
  });
}

sadam_rana

thanks u calsign it works

sadam_rana

calsign do tell me the library for showing message in java mode thanks in advance

Aswinth_Raj

@calsign Is it possible to launch a toast even when the app is closed. Sorry if i sound rubbish!

Aswinth_Raj

For the code

import android.widget.Toast;

void setup()
{
  size(displayWidth,displayHeight);
}

void draw()
{
  background(255);
}

void mousePressed()
{
   showToast("Hellow World");
}

void showToast(final String message) {
  runOnUiThread(new Runnable() {
    public void run() {
      android.widget.Toast.makeText(getApplicationContext(), message, android.widget.Toast.LENGTH_SHORT).show();
    }
  });
}

I get the following ERROR

1. ERROR in C:\Users\BPAS\AppData\Local\Temp\android4289731801464903815sketch\src\processing\test\notify\notify.java (at line 40)
    runOnUiThread(new Runnable() {
    ^^^^^^^^^^^^^
The method runOnUiThread(new Runnable(){}) is undefined for the type notify
----------
2. ERROR in C:\Users\BPAS\AppData\Local\Temp\android4289731801464903815sketch\src\processing\test\notify\notify.java (at line 42)
    android.widget.Toast.makeText(getApplicationContext(), message, android.widget.Toast.LENGTH_SHORT).show();
                                  ^^^^^^^^^^^^^^^^^^^^^
The method getApplicationContext() is undefined for the type new Runnable(){}
----------
2 problems (2 errors)

PLEASE HELP!!!

akenaton

@Aswinth_Raj===

• of course: you are in a fragment...
• and no, you cannot launch a toast when your app is "closed" (what do you mean by "closed"??? - Is it "paused" - is it "destroyed???")

akenaton

@calsign===

you are not in an activity but in a fragment; so you have to write::

    //Activity act = this.getActivity();

    void showToast(final String message) {
      act.runOnUiThread(new Runnable() {
        public void run() {
          android.widget.Toast.makeText(act.getApplicationContext(), message, android.widget.Toast.LENGTH_SHORT).show();
        }
      }); 

[-X

Aswinth_Raj

Thanks a lot guys!!

'import android.widget.Toast; import android.app.Activity;

Activity act;

void setup() { size(displayWidth,displayHeight); act = this.getActivity(); }

void draw() { background(255); }

void mousePressed() { showToast("Hellow World"); }

void showToast(final String message) { act.runOnUiThread(new Runnable() { public void run() { android.widget.Toast.makeText(act.getApplicationContext(), message, android.widget.Toast.LENGTH_SHORT).show(); } }); } '

I got it working! Thanks again