Develop Reference

Custom button form (House/Tree etc.)

I'm a bit new to Android, therefore question may sound ridiculous, but:
Is there any way to make a button in form of smthg? There ate tons of apps, where you press on a tree or some house and some action starts. How is that made?
Not action, but form. Or there is no way to make button NOT rectangular?

You are talking about imagebutton.Image button documentation
For example creating a button with tree background.Example:
<ImageButton android:src="#drawable/tree.png"></ImageButton>

Yes you can do that. Considering your trees and house as an image.
ImageView im;
im = (ImageView) findViewById(R.id.image_of_tree);
im.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//perform some action
}
});

Off-course When you get inflated your layout and your view(can be any view) is available by id. your button can be an ImageView, ImageButton etc. just find the id for your view and set whatever event you want to listen by this view.

two image button with onClick in same place

I need to do a two image button with onClick.That two image button have to be located in same place.one image button is to start functionality for voice record and other image button is stop functionality for voice record.
I done a functionality exactly.My only problem is to use two image button for stop and start in same place.
I searched many tutorials and SO posts.But I didn't get it.
Anyone can help me with this.

Just use one button and the method setBackgroundResource of the ImageButton. use one and the same button and in the onClick method use this line:
yourButton.setBackgroundResource(R.drawable.startImg); //for start of the recording
and
yourButton.setBackgroundResource(R.drawable.stopImg); //for stop of the recording

if (myAudioRecorder==null) {
myAudioRecorder.start();
audioButton.setImageResource(R.drawable.stop);
} else if (myAudioRecorder != null) {
audioButton.setImageResource(R.drawable.record);
}

Android - Trigger a loop that repeatedly redraws in a listener (force invalidate even though UI thread is busy)

I have a view that contains a user's drawing. When clicking a 'play' button I want to have a loop that draws the image from start to finish.
In attempting to do this I basically have a loop inside of an onClickListener for the play button that essentially invalidates the view, waits, sets the next set of points and invalidates again.
The problem is that the image doesn't actually redraw until after the entire image is draw. So essentially nothing happens and then it's all of a sudden done. After doing some research, my assumption is that invalidate is telling the main UI thread to redraw when it gets time, but it's already hung up on dealing with the listener, so it doesn't actually draw until the loop is finished. I've tried calling onDraw directly, using postInvalidate, and just about any other ridiculous thing I can think of, but I'm not sure how to get this to work.
Here are some code snippets:
In my PaintActivity(Which has a PaintAreaView)
The scrubber indicates the progress of the drawing. The first to lines in onProgressChanged works when I manually use the seek bar, but not when pressing play, which is why I tried adding all the extras.
_scrubber.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
#Override
public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
_paintAreaView.setPointsToDraw(_scrubber.getProgress());
_paintAreaView.invalidate();
_mainViewGroup.invalidate();
_paintAreaView.postInvalidate();
_mainViewGroup.postInvalidate();
_paintAreaView.drawPoints(_paintAreaView.getCanvas());
_paintAreaView.invalidate();
}...
My Play Button stuff:
play.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
...
playDrawing();
...
}
});
private void playDrawing()
{
int endPoint = getPaintPointCount();
while(_scrubber.getProgress() < endPoint)
{
_scrubber.incrementProgressBy(1);
try{
Thread.sleep(10);
}catch(InterruptedException e)
{
Thread.currentThread().interrupt();
}
//_paintAreaView.setPointsToDraw(_scrubber.getProgress());
//_paintAreaView.invalidate();
//_mainViewGroup.invalidate();
if(_isPaused)
break;
}
}
I'm not a huge fan of using that sleep, but I've struggled with other solutions and that's my next thing to research. But for this question, incrementing the progress bar does successfully call onProgressChanged, but again it just isn't drawing the view until it's out of that play button click listener.
If I have to wait until I'm out of the listener to get this to work, I'm new enough that I'm not sure how I would approach that.
Sorry for my bad code, any help is much appreciated to help me understand what's happening here and what I need to understand to get this to work.
Thank you!

I got it to work, I'm not sure if all I did was necessary, but here are the changes I made based on my Main UI thread theory being the problem.
I created a class Thread member variable:
private Thread _drawThread;
In onCreate():
_drawThread = new Thread(){
public void run(){
playDrawing();
}
};
play Button onClick:
play.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
...
_drawThread.start();
}
});
Seems to be doing just what I want! Except the app crashes the second time I hit play :) From here I don't think it'll be to bad to figure out that issue though.
EDIT-----
Creating the Thread in my play button onClickListener instead of having it be a member variable fixed the crashing. I incorrectly assumed the thread would be destroyed as soon as the listener went out of scope on the main thread, but I guess that's not the case.

How to set up Media controller to play audio?

i have an image with some text that i have the audio for.
I want to know how i can set it up so the user can the the button and the audio will start to play.
Thanks!

I have a solution I think it might work.
Fisrt of all, instead of working it an ImageView would be easier to work with ImageButton.
So, in your layour XML file, select ImageButton and create one using your image with the text.
also you might want to set a null bacground for your ImageButton, this is the code
android:background="#null"
Next, in your java class select the sound and the ImageButton and set it to play your sound when clicked.
would be like this
final MediaPlayer yourSoundName = MediaPlayer.create(Lotr1.this,R.raw.yoursoundfile);
final ImageButton yourImageButtonName =(ImageButton) findViewById(R.id.yourImage);
yourImageButtonName .setOnClickListener(new Button.OnClickListener() {
public void onClick(View v) {
yourSoundName.start();
}
}
});
Any quenstion I would be glad to help

What makes a button switch and keep color on click?

I want to create a Button that behaves like a switch.
It should change its color when the user clicks it, and keep the color.
So the button is white at first and when the user clicks it, the color changes to black. When the user clicks it again it switches back to white and so on.
I tried it with a simple if else construct but only managed to get the button to be white at first and when being clicked change to black, but it won´t change back to white when clicked again.
Here´s the code so far. I guess it´s a dumb simply mistake but can´t seem to get through with it. "changecolor" is a variable I declared myself.
// Select Button Safe or At-Risk
final Button button7 = (Button) findViewById(R.id.SafeBT);
button7.setOnClickListener(new OnClickListener(){
public void onClick(View v) {
// Perform action on clicks, change color
if (changecolor == 0) {
button7.setBackgroundColor(color.black);
changecolor = 1;
} else {
button7.setBackgroundColor(color.white);
changecolor = 0;
}
}
});
Tanks for advice and help in advance.

where you have declared your variable changecolor?? .
Second thingis that you can simply an UI Element which call it : ToggleButton , it is like a Switch Button ON/OFF . is that what you want ? see this link : http://developer.android.com/reference/android/widget/ToggleButton.html