Screen Brightness

Reactionic

I'm trying to set screen brightness maximum but i couldn't do it somehow.

Here is my code:

` void setup(){ fullScreen(JAVA2D);

WindowManager.LayoutParams lp = getActivity().getWindow().getAttributes(); lp.screenBrightness = 1; getActivity().getWindow().setAttributes(lp); } `

void draw(){ //somestuff }

When i run it, application crashes on the phone. Then in the console;

android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views. at android.view.ViewRootImpl.checkThread(ViewRootImpl.java:8128) at android.view.ViewRootImpl.requestLayout(ViewRootImpl.java:1220) at android.view.View.requestLayout(View.java:20085) at android.view.View.setLayoutParams(View.java:13597) at android.view.WindowManagerGlobal.updateViewLayout(WindowManagerGlobal.java:360) at android.view.WindowManagerImpl.updateViewLayout(WindowManagerImpl.java:97) at android.app.Activity.onWindowAttributesChanged(Activity.java:2858) at android.view.Window.dispatchWindowAttributesChanged(Window.java:894) at com.android.internal.policy.PhoneWindow.dispatchWindowAttributesChanged(PhoneWindow.java:5057) at android.view.Window.setAttributes(Window.java:925) at processing.test.sketch_161217b.sketch_161217b.setup(sketch_161217b.java:48) 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:818)

jeremydouglass

Hm. I'm not an Android developer, but that looks like an extremely specific error message.

android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.

Did you search for it?

https://www.google.com/search?q=android.view.ViewRootImpl$CalledFromWrongThreadException:+Only+the+original+thread+that+created+a+view+hierarchy+can+touch+its+views

Were any of the top discussion on this specific error helpful?

1. http://stackoverflow.com/questions/18656813/android-only-the-original-thread-that-created-a-view-hierarchy-can-touch-its-vi
2. http://stackoverflow.com/questions/14978052/only-the-original-thread-that-created-a-view-hierarchy-can-touch-its-views-on-a
3. http://stackoverflow.com/questions/5161951/android-only-the-original-thread-that-created-a-view-hierarchy-can-touch-its-vi

GoToLoop

https://forum.Processing.org/two/discussions/tagged/calledfromwrongthreadexception

Lord_of_the_Galaxy

And please format your code.

kfrajer

Here is a working example. Tap the screen along the width of the screen (I set it in portrait mode) and you will see a change in brightness.

Kf

import android.app.Activity;
import android.content.Context;
import android.widget.FrameLayout;
import android.widget.RelativeLayout;
import android.text.Editable;
import  android.graphics.Color;
import android.widget.Toast;
import android.os.Looper;
import android.view.WindowManager;
import android.view.inputmethod.InputMethodManager;
import android.os.Bundle;


import android.view.WindowManager;
import android.view.WindowManager.LayoutParams;


Activity act;
Context mC;

@Override 
  public void onStart() {
  super.onStart();

  act = this.getActivity();
  mC= act.getApplicationContext();

  setBrightness(0.2);
}

void setBrightness(float val) {
  WindowManager.LayoutParams lp = act.getWindow().getAttributes(); 
  lp.screenBrightness = val; 
  act.getWindow().setAttributes(lp);
}

void setup() { 
  fullScreen();
  orientation(PORTRAIT);
  fill(0);
  textAlign(CENTER,CENTER);
  textSize(40);

  Looper.prepare();
} 


void draw() { 
  background(255);
  text("Current brightness="+map(mouseX, 0, width, 0, 1), width/2, height/2);
}


void mousePressed() {
  act.runOnUiThread(new Runnable() {
    public void run() {
      setBrightness(map(mouseX, 0, width, 0, 1));
    }
  }
  );
}