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POAndroid: roatating images in a loop
 

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  1. POAndroid: roatating images in a loop
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    <p>I am trying with no success to modify the code example from:</p> <p><a href="http://www.inter-fuser.com/2009/08/android-animations-3d-flip.html" rel="nofollow">http://www.inter-fuser.com/2009/08/android-animations-3d-flip.html</a></p> <p>so it will rotate the images in a loop, when clicking on the image once. (second click should pause).</p> <p>I tried using Handler and threading but cannot update the view since only the main thread can update UI.</p> <p>Exception I get from the code below:</p> <p>android.view.ViewRoot$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.</p> <p>[in 'image1.startAnimation(rotation);' ('applyRotation(0, 90);' from the main thread)]</p> <pre><code>package com.example.flip3d; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.animation.AccelerateInterpolator; import android.widget.ImageView; public class Flip3d extends Activity { private ImageView image1; private ImageView image2; private boolean isFirstImage = true; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); image1 = (ImageView) findViewById(R.id.image01); image2 = (ImageView) findViewById(R.id.image02); image2.setVisibility(View.GONE); image1.setOnClickListener(new View.OnClickListener() { public void onClick(View view) { if (isFirstImage) { applyRotation(0, 90); isFirstImage = !isFirstImage; } else { applyRotation(0, -90); isFirstImage = !isFirstImage; } } }); } private void applyRotation(float start, float end) { // Find the center of image final float centerX = image1.getWidth() / 2.0f; final float centerY = image1.getHeight() / 2.0f; // Create a new 3D rotation with the supplied parameter // The animation listener is used to trigger the next animation final Flip3dAnimation rotation = new Flip3dAnimation(start, end, centerX, centerY); rotation.setDuration(500); rotation.setFillAfter(true); rotation.setInterpolator(new AccelerateInterpolator()); rotation.setAnimationListener(new DisplayNextView(isFirstImage, image1, image2)); if (isFirstImage) { image1.startAnimation(rotation); } else { image2.startAnimation(rotation); } } } </code></pre> <p>How can I manage to update the UI and control the rotation within onClick listener?</p> <p>Thank you,</p> <p>Oakist</p>
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    1. USoakist
    1. USoakist
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      1. POAndroid: roatating images in a loop
      1. USJason Rogers
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      1. POAndroid: roatating images in a loop
      1. USMarqs
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    1. COPlease format your question well.
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      1. POAndroid: roatating images in a loop
      1. USHarry Joy
 

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