It should be straightforward, but I am not sure where something is wrong.
I try to catch the click on the TextView with:
public void runNextTask(){
If you change your code to have this structure it will work:
public void runNextTask(){
...
}
public void onClick(View v) {
}
as you're telling in your xml to capture the click for the text view (android:onClick="onClick") in onClick module, you don't need to add an onClick listener in your java code.