Insert view dynamically into HorizontalScrollView in Android

Question

I am developing an application for Android 3.0, which has one action that should scroll along the horizontal axis, for example, in an e-book.

For this, I use RelativeLayout inside a HorizontalScrollView in my layout. Here is the XML:

<?xml version="1.0" encoding="utf-8"?> <HorizontalScrollView xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="horizontal" android:layout_width="800px" android:id="@+id/horizontalScroll" android:background="#C6D7D2" android:layout_height="600px"> <RelativeLayout android:id="@+id/container" android:layout_width="fill_parent" android:layout_height="fill_parent"> </RelativeLayout> </HorizontalScrollView> 

This XML file is called main.xml.

What am I doing in the java file:

 setContentView(R.layout.main); parent = (ViewGroup) findViewById(R.id.container); View v = createView(); // Thats working for sure. parent.addView(v); 

But it does not work, view V is not displayed on the screen. But if I do

 addContentView(v) 

it adds the v view to the screen (proof that my method works), but it doesn't scroll as it is outside of the HorizontalScrollView. What am I doing wrong?

UPDATE: I tried with this, and it also failed:

 setContentView(R.layout.main); LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); ViewGroup parent = (ViewGroup) findViewById(R.id.container); View v = new View(this); v.setBackgroundColor(Color.BLUE); parent.addView(v,params); 

I do not get a blue background.

Answer 1

Change the width of the Relativelayout to wrap_content .

Try using this method to add a view.

 void addView (View child, ViewGroup.LayoutParams params) 

EDIT:
Remove android:orientation="horizontal" from HorizontalScrollView

Answer 2

 HorizontalScrollView scrollView = (HorizontalScrollView) findViewById(R.id.scrollView1); LinearLayout topLinearLayout = new LinearLayout(this); // topLinearLayout.setLayoutParams(android.widget.LinearLayout.LayoutParams.FILL_PARENT,android.widget.LinearLayout.LayoutParams.FILL_PARENT); topLinearLayout.setOrientation(LinearLayout.HORIZONTAL); for (int i = 0; i < 15; i++){ final ImageView imageView = new ImageView (this); imageView.setTag(i); imageView.setImageResource(R.drawable.ic_launcher); topLinearLayout.addView(imageView); imageView.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub Log.e("Tag",""+imageView.getTag()); } }); } scrollView.addView(topLinearLayout); // ImageView img=(ImageView)findViewById(R.id.imageView1); // final ImageLoader imageLoader = ImageLoader.getInstance(); // // // // ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(getApplicationContext()) // .threadPoolSize(3) // .threadPriority(Thread.NORM_PRIORITY - 2) // .memoryCacheSize(1500000) // 1.5 Mb // .discCacheSize(50000000) // 50 Mb // .httpReadTimeout(10000) // 10 s // .denyCacheImageMultipleSizesInMemory() // .enableLogging() // Not necessary in common // .build(); // // Initialize ImageLoader with configuration. // ImageLoader.getInstance().init(config); // // final DisplayImageOptions options = new DisplayImageOptions.Builder() // .showStubImage(R.drawable.ic_launcher) // .cacheInMemory() // .cacheOnDisc() // .build(); // // imageLoader.displayImage("http://3.bp.blogspot.com/_Sd45ASngYHA/TVC78RORKoI/AAAAAAAAARk/y0GcNkTmb40/s1600/android+logo1.jpg",img,options); // // img.setOnClickListener(new OnClickListener() // { // // @Overridt // public void onClick(View v) // { // // TODO Auto-generated method stub // Dialog d =new Dialog(TestActivity.this); // d.setContentView(R.layout.dialog); // // d.setCancelable(true); // // ImageView d_img=(ImageView)d.findViewById(R.id.dialog_img); //// d.setLayoutParams(L) // imageLoader.displayImage("http://3.bp.blogspot.com/_Sd45ASngYHA/TVC78RORKoI/AAAAAAAAARk/y0GcNkTmb40/s1600/android+logo1.jpg",d_img,options); // // d.show(); // } // }); 

Answer 3

you add view to relativelayout not to horizontalscrollview using parent

try with horizontalscrollview object as you can do with relativelayout

Answer 4

 Try this code. ImageView imageView = new ImageView(this); imageView.setScaleType(ImageView.ScaleType.FIT_CENTER); imageView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT)); imageView.setBackgroundColor(Color.blue); parent.addView(v,params);