如何在 java 中以编程方式添加/更改按钮背景？

Question

How to change the button background programmatically?

I want to add the button background when clicked.

Here is my code.

        butt.setOnClickListener(view -> {
        but1.setOnClickListener(View -> {
            but1.setBackground(getDrawable(R.drawable.ic_baseline_clear_24));
            y = 1;
        });
        but2.setOnClickListener(View -> but2.setBackground(getDrawable(R.drawable.ic_baseline_clear_24)));
        but3.setOnClickListener(View -> but3.setBackground(getDrawable(R.drawable.ic_baseline_clear_24)));
        but4.setOnClickListener(View -> but4.setBackground(getDrawable(R.drawable.ic_baseline_clear_24)));
        but5.setOnClickListener(View -> but5.setBackground(getDrawable(R.drawable.ic_baseline_clear_24)));
        but6.setOnClickListener(View -> but6.setBackground(getDrawable(R.drawable.ic_baseline_clear_24)));
        but7.setOnClickListener(View -> but7.setBackground(getDrawable(R.drawable.ic_baseline_clear_24)));
        but8.setOnClickListener(View -> but8.setBackground(getDrawable(R.drawable.ic_baseline_clear_24)));
        but9.setOnClickListener(View -> but9.setBackground(getDrawable(R.drawable.ic_baseline_clear_24)));
    });
    if (y == 1){
        mmd.setText("mmd is on");
    }

thaks for help:)

Answer 1

To set background drawable programmatically use ContextCompat

yourButton.setBackground(ContextCompat.getDrawable(context, R.drawable.yourDrawableFileName));