Ah - that would probably be a problem. I've added them originally to the main xml but I now see where that could be a problem. Do you have a suggestion on what the best way to add the drawables/drawing functionality - from what I can gather I should use a canvas, but how do I go about doing that?
Thanks and sorry for the stupid/very basic questions. On Jul 23, 2:30 pm, Romain Guy <[email protected]> wrote: > Yes you do change their alpha but I don't see these drawables attached > to any view or even being drawn manually. > > On Thu, Jul 23, 2009 at 2:27 PM, > > Erin<[email protected]> wrote: > > > Supposedly I setAlpha of both of them to Transparent in my OnCreate > > menu after setting up the button clicks. The transparency is also > > supposed to change during the OnSeekBarChanged-->OnProgressChanged > > method. > > > On Jul 23, 2:18 pm, Romain Guy <[email protected]> wrote: > >> I don't see you do anything with rect1 and rect2?? > > >> On Thu, Jul 23, 2009 at 2:14 PM, > > >> Erin<[email protected]> wrote: > > >> > Thanks for the speedy reply. > > >> > I copied all my code into a new project with the 1.5 SDK but, while > >> > I'm not getting any code errors, the rectangles don't change > >> > transparency. I've thrown in a bunch of log statements to prove that > >> > the code is actually getting to the setAlpha commands but when I run > >> > it in the emulator it just shows the rectangles as constantly opaque. > > >> > Any thoughts? > > >> > On Jul 23, 11:55 am, Romain Guy <[email protected]> wrote: > >> >> mutate() is available only in Android 1.5, it seems like you are > >> >> developing with an older SDK. > > >> >> On Thu, Jul 23, 2009 at 11:11 AM, > > >> >> Erin<[email protected]> wrote: > > >> >> > Hi, > >> >> > I'm sorry if I've missed something obvious but here goes. > > >> >> > I'm currently trying to make an android app where when one moves a > >> >> > seekbar past a certain value a blue rectangle goes from transparent to > >> >> > opaque. This rectangle/value pairing will be repeated for roughly 10 > >> >> > values in the seekbar. (Picture the AT&T bars being controlled by a > >> >> > seekbar). I understand that when I try to change the alpha of my > >> >> > rectangles (created from a resource in my drawable folder) I'm > >> >> > changing both of them at the same time. I also understand the solution > >> >> > to this is by calling mutate on my rectangles. What I'm having trouble > >> >> > with is actually accomplishing this. > > >> >> > The error I get is: The method mutate() is undefined for the type > >> >> > Drawable (lines 59 and 61). > > >> >> > I've tried changing my rectangles to ImageView and to ShapeDrawable. > >> >> > I've also tried modeling it off of the following from one of the > >> >> > previous posts but that didn't work either. > >> >> > Drawable star = context.getResources().getDrawable(R.drawable.star); > >> >> > if (book.isFavorite()) { > >> >> > star.mutate().setAlpha(255); // opaque > >> >> > } else { > >> >> > star.mutate().setAlpha(70); // translucent > > >> >> > Any help would be very, very appreciated. > >> >> > Thanks, > >> >> > Erin > > >> >> > Below is all of my code: > > >> >> > package com.artificialmuscle.controllers; > > >> >> > import android.app.Activity; > >> >> > import android.app.AlertDialog; > >> >> > import android.content.Context; > >> >> > import android.content.DialogInterface; > >> >> > import android.graphics.Canvas; > >> >> > import android.graphics.drawable.Drawable; > >> >> > import android.graphics.drawable.ShapeDrawable; > >> >> > import android.graphics.drawable.shapes.RectShape; > >> >> > import android.media.MediaPlayer; > >> >> > import android.os.Bundle; > >> >> > import android.util.AttributeSet; > >> >> > import android.util.Log; > >> >> > import android.view.View; > >> >> > import android.view.View.OnClickListener; > >> >> > import android.widget.Button; > >> >> > import android.widget.SeekBar; > >> >> > import android.widget.SeekBar.OnSeekBarChangeListener; > > >> >> > public class Controllers extends Activity { > >> >> > /** Called when the activity is first created. */ > > >> >> > private final int OPAQUE = 255; > >> >> > private final int TRANSPARENT = 75; > > >> >> > private MediaPlayer mp = null; > >> >> > Drawable rect1 = null; > >> >> > Drawable rect2 = null; > > >> >> > �...@override > >> >> > public void onCreate(Bundle savedInstanceState) { > >> >> > super.onCreate(savedInstanceState); > >> >> > setContentView(R.layout.main); > > >> >> > Button button1 = (Button)findViewById(R.id.button1); > >> >> > Button button2 = (Button)findViewById(R.id.button2); > >> >> > Button button3 = (Button)findViewById(R.id.button3); > > >> >> > button1.setOnClickListener(new OnClickListener(){ > >> >> > public void onClick(View > >> >> > viewParam){createDialogs(1);}}); > >> >> > button2.setOnClickListener(new OnClickListener(){ > >> >> > public void onClick(View > >> >> > viewParam){createDialogs(2);}}); > >> >> > button3.setOnClickListener(new OnClickListener(){ > >> >> > public void onClick(View > >> >> > viewParam){createDialogs(3);}}); > > >> >> > rect1 = (ShapeDrawable)this.getResources().getDrawable > >> >> > (R.drawable.bluerect); > >> >> > rect2 = this.getResources().getDrawable(R.id.rect2); > > >> >> > // Ignore the different syntax I was only trying > >> >> > options > >> >> > rect1.mutate(); > >> >> > rect1.setAlpha(TRANSPARENT); > >> >> > rect2.mutate().setAlpha(TRANSPARENT); > > >> >> > SeekBar mySeekBar = (SeekBar)findViewById(R.id.mySeekBar); > >> >> > mySeekBar.setMax(100); > > >> >> > OnSeekBarChangeListener myListener = new > >> >> > OnSeekBarChangeListener() > >> >> > { > > >> >> > public void onProgressChanged(SeekBar arg0, int arg1, > >> >> > boolean > >> >> > arg2) { > >> >> > // TODO Auto-generated method stub > > >> >> > Log.i("seekbar","seekbar value changed > >> >> > to "+arg1); > > >> >> > // play sounds on 10, 20.. 90 > >> >> > if (arg1%10 == 0) { > >> >> > if (mp != null) { > >> >> > mp.stop(); > >> >> > mp.release(); > >> >> > } > >> >> > mp = > >> >> > MediaPlayer.create(Controllers.this, R.raw.sine25hz20ms); > >> >> > mp.start(); > >> >> > } > > >> >> > //if (arg1 == 10)Log.i("rectangle","I > >> >> > am at 10!!!"); > > >> >> > if (arg1 >= 10) > >> >> > {rect1.setAlpha(OPAQUE);}// Log.i("rectangle","set > >> >> > rect 1");} > >> >> > else rect1.setAlpha(TRANSPARENT); > > >> >> > if (arg1 >= 20) > >> >> > {rect2.setAlpha(OPAQUE);}//Log.i("rectangle","set > >> >> > rect 2");} > >> >> > else rect2.setAlpha(TRANSPARENT); > >> >> > } > > >> >> > public void onStartTrackingTouch(SeekBar > >> >> > seekBar) { > >> >> > // TODO Auto-generated method stub > > >> >> > } > > >> >> > public void onStopTrackingTouch(SeekBar > >> >> > seekBar) { > >> >> > // TODO Auto-generated method stub > > >> >> > }}; > > >> >> > mySeekBar.setOnSeekBarChangeListener(myListener); > > >> >> > } > > >> >> > public void createDialogs(int dialogID){ > >> >> > AlertDialog.Builder builder = new AlertDialog.Builder > >> >> > (Controllers.this); > > >> >> > //if (dialogID == 1) > >> >> > switch (dialogID) > >> >> > { > >> >> > case 1: builder.setMessage("You clicked Button"+dialogID) > >> >> > .setNeutralButton("DUH", new > >> >> > DialogInterface.OnClickListener > >> >> > () { > >> >> > public void > >> >> > onClick(DialogInterface dialog, int id) { > >> >> > dialog.cancel(); > >> >> > }// onClick > >> >> > }) > >> >> > .show(); > >> >> > break; > >> >> > case 2: > >> >> > builder.setMessage("You clicked me, I am > >> >> > Button"+dialogID) > >> >> > .setNeutralButton("DUH", new > >> >> > DialogInterface.OnClickListener() { > >> >> > public void onClick(DialogInterface > >> >> > dialog, int id) { > >> >> > dialog.cancel(); > >> >> > }// onClick > >> >> > }) > >> >> > .show(); > >> >> > break; > >> >> > case 3: > >> >> > builder.setMessage("You clicked me") > >> >> > .setNeutralButton("DUH", new > >> >> > DialogInterface.OnClickListener() { > >> >> > public void onClick(DialogInterface > >> >> > dialog, int id) { > >> >> > dialog.cancel(); > >> >> > }// onClick > >> >> > > > ... > > read more » --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Beginners" group. 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