Android: Speeding up display of (html-formatted) text
- by prepbgg
My app uses a StringBuilder to assemble paragraphs of text which are then displayed in a TextView within a ScrollView.
The displaytext.xml layout file is:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout android:id="@+id/LinearLayout01"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#FFFFFF"
xmlns:android="http://schemas.android.com/apk/res/android">
<ScrollView
android:id="@+id/ScrollView01"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
>
<TextView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/display_text"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textColor="#000000"
>
</TextView>
</ScrollView>
</LinearLayout>
and the code that displays the StringBuilder object sbText is
setContentView(R.layout.displaytext);
TextView tv = (TextView)findViewById(R.id.display_text);
tv.setText(Html.fromHtml(sbText.toString()));
This works OK, except that it gets very slow as the amount of text grows. For example, to display 50 paragraphs totalling about 50KB of text takes over 5 seconds just to execute those three lines of code.
Can anyone suggest how I can speed this up, please?
