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POAdding view causes "Child already has parent" error
 

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  1. POAdding view causes "Child already has parent" error
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    <p>I'm making a gallery app and adding image buttons dynamically using the code below, this works on one of my devices but on the other I get a</p> <pre><code> java.lang.RuntimeException: Unable to start activity ComponentInfo{package/package.MainActivity}: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first. Caused by: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first. E/AndroidRuntime( 3358): at android.view.ViewGroup.addViewInner(ViewGroup.java:3381) E/AndroidRuntime( 3358): at android.view.ViewGroup.addView(ViewGroup.java:3252) E/AndroidRuntime( 3358): at android.view.ViewGroup.addView(ViewGroup.java:3197) E/AndroidRuntime( 3358): at android.view.ViewGroup.addView(ViewGroup.java:3173) E/AndroidRuntime( 3358): at package.MainActivity.onCreate(MainActivity.java:74) </code></pre> <p>error, but on the other device no problems at all and it runs fine. The one that it works on is running 4.1.2 and the one it crashes on is running 4.1.1 could this be it? the project's min and targeted sdk is 16 </p> <pre><code> setContentView(R.layout.activity_main); // Hook up clicks on the thumbnail views. imgHolder = (LinearLayout)findViewById(R.id.imgHolder); for(int x = 0; x &lt; files.length; x++) { Log.d("Conor",files[x].getAbsolutePath()); Drawable img = Drawable.createFromPath(files[x].getAbsolutePath()); imgs.add(img); thumbs.add(new ImageButtons(this, files[x].getAbsolutePath(),x)); thumbs.get(x).setImageDrawable(img); thumbs.get(x).setOnClickListener(onCl); imgHolder.addView(thumbs.get(x)); } // Retrieve and cache the system's default "short" animation time. mShortAnimationDuration = getResources().getInteger(android.R.integer.config_shortAnimTime); </code></pre> <p>ImageButtons class that <code>thumbs</code> is an `ArrayList of </p> <pre><code>import java.io.IOException; import org.xmlpull.v1.XmlPullParser; import org.xmlpull.v1.XmlPullParserException; import android.content.Context; import android.content.res.Resources; import android.graphics.Color; import android.graphics.drawable.Drawable; import android.util.AttributeSet; import android.util.Log; import android.util.Xml; import android.view.ViewGroup.LayoutParams; import android.widget.ImageButton; public class ImageButtons extends ImageButton{ Resources res = getResources(); public ImageButtons(Context context,String img,int id) { super(context); XmlPullParser parser = res.getXml(R.layout.imagebuttons); AttributeSet attributes = null; int state = 0; while(state != XmlPullParser.END_DOCUMENT) { try { state = parser.next(); } catch (XmlPullParserException e1) { e1.printStackTrace(); } catch (IOException e1) { e1.printStackTrace(); } if (state == XmlPullParser.START_TAG) { if (parser.getName().equals("ImageButton")) { attributes = Xml.asAttributeSet(parser); break; } } } setId(id); setLayoutParams(new LayoutParams(context, attributes)); } } </code></pre> <p>thumbs is an <code>ArrayList&lt;ImageButton&gt;</code> and line 74 refers to `imgHolder.addView(thumbs.get(x));</p> <p>Again my question is why this works on some devices but not others </p>
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    1. COPlease post the whole LogCat stack trace and make sure we can tell which line of your code the exception's thrown from. We also need to see information about `thumbs`, since it looks like the problem is that you're trying to attach `thumbs.get(x)` to multiple parents. It's entirely possible that the difference isn't Android but your runtime environment.
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    2. COI have added the logcat stack trace, the line in question is imgHolder.addView(thumbs.get(x))
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    3. COYes, but what is the value type of `thumbs`? You're making assumptions about what piece of the code is important, and you're not providing what we need.
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