Programmatically setting TextView background

Question

I've defined a background for my TextView :

<?xml version="1.0" encoding="utf-8"?>
<shape
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape= "rectangle"  >
    <solid android:color="#000"/>
    <stroke android:width="1dp"  android:color="#ff9"/>
</shape>

Now I'm trying to set it to my TextView programmatically:

textview.setBackground((Drawable)findViewById(R.drawable.cellborder));

This isn't working though, it's telling me it can't cast a View as a Drawable . Is there another way to do this?

Answer 1

You have to use

getResources().getDrawable(R.drawable.cellborder);

which will return a Drawable .

If you use findViewById() it will try to find a View in the View Hierarchy and return that. A View is not a Drawable , so you can't cast it.

Answer 2

If you want backwards compatibility then use the following:

textView.setBackground(ContextCompat.getDrawable(MainActivity.this, R.drawable.cellborder));

Replace MainActivity.this with the name of the activity from where are you calling these methods.

If you call textView.setBackground(...) from Pijamas activity then do the following:

textView.setBackground(ContextCompat.getDrawable(Pijamas.this, R.drawable.cellborder));

Answer 3

try to set drawable like this

textview.setBackgroundDrawable( getResources().getDrawable(R.drawable.cellborder) );

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