Curl by harism android page adding TextView and exception:
I need to edit the harism project about page_curl https://github.com/harism/android_page_curl with the following requirement: I need to add the TextView below the Curl_View (when the page is flipped, the content of the textView will change). I have created an interface that feeds the TextView with data
public interface TextProvider{
public int getTextCount();
public void setText(int index);
public String getText(int index);
public TextView getTextView();
}
and the only place to update the TextView when the pages are triggered is in the onDrawFrame () method
but I have the following exception: android.view.ViewRoot $ CalledFromWrongThreadException: Only the original thread that created the view hierarchy can touch its views.
Some solutions say that I should use a handler, My question is how to use a handler in this case?
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I tried this and it worked: private class BitmapProvider implements CurlView.BitmapProvider {
private int[] mBitmapIds = {};
public void setImageList( int[] value )
{
mBitmapIds = value;
}
public BitmapDrawable writeOnDrawable( int drawableId, String text, int x, int y, int width )
{
Bitmap bitmap = BitmapFactory.decodeResource( getResources(), drawableId ).copy( Bitmap.Config.ARGB_8888, true );
Bitmap newBitmap = Bitmap.createBitmap( bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888 );
Canvas canvas = new Canvas( newBitmap );
canvas.drawBitmap( bitmap, new Matrix(), null);
if( text != "" ){
TextView tv = new TextView( getApplicationContext() );
tv.setText( text );
tv.setTextColor( 0xa00050ff );
tv.setTextSize( 24 );
tv.setTypeface( typeface );
Bitmap txtBitmap = Bitmap.createBitmap( width, 768, Bitmap.Config.ARGB_8888 );
Canvas c = new Canvas( txtBitmap );
tv.layout( 0, 0, width, 300 );
tv.draw( c );
canvas.drawBitmap( txtBitmap, x, y, null );
}
return new BitmapDrawable( newBitmap );
}
//@Override
public Bitmap getBitmap( int width, int height, int index )
{
BitmapDrawable drawable;
Page currentPage = getCurrentPage( index );
if( currentPage.getText() != null ){
drawable = writeOnDrawable( mBitmapIds[ index ] , currentPage.getText(), currentPage.getTextFieldX(), currentPage.getTextFieldY(), currentPage.getTextFieldWidth() );
} else {
drawable = writeOnDrawable( mBitmapIds[ index ] , "", currentPage.getTextFieldX(), currentPage.getTextFieldY(), currentPage.getTextFieldWidth() );
}
Bitmap bitmap = drawable.getBitmap();
return bitmap;
}
//@Override
public int getBitmapCount() {
return mBitmapIds.length;
}
}
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