How to set the button background image through code

I am using a Button created using following code

LinearLayout ll = new LinearLayout(this);
ll.setOrientation(LinearLayout.VERTICAL);

Button btn = new Button(this);
btn.setOnClickListener(newtodobtn);
btn.setText("New Todo");

btn.setBackgroundDrawable(new Button(this).getBackground());

ll.addView(btn);

I have an image in path @drawable/new_todo_image to set as background for the button. How 开发者_如何学编程to set it to the Button programmatically?

for set background image for button which is in drawable folder then use below code

btn.setBackgroundResource(R.drawable.new_todo_image);

Try this:

btn.setBackgroundDrawable(getResources().getDrawable(R.drawable.new_todo_image));

try this:

btn.setBackgroundDrawable(getResources().getDrawable(R.drawable.new_todo_image));

Try like this

final int sdk = android.os.Build.VERSION.SDK_INT;
    if(sdk < android.os.Build.VERSION_CODES.JELLY_BEAN)
     {
      mBtn.setBackgroundDrawable( getResources().getDrawable(R.drawable.new_todo_image) );
     } 
    else
       {
       mBtn.setBackground( getResources().getDrawable(R.drawable.new_todo_image));
       }

In android studio to set Button background Image write following code :

int image_resid = getApplicationContext().getResources().getIdentifier("image_name", "drawable", getApplicationContext().getPackageName());
button.setBackgroundResource(image_resid);

You should put your png files into Drawable folder, then try these codes:

Button buttonSES = (Button) findViewById(R.id.buttonSES)    
buttonSES.setBackgroundResource(R.drawable.image1);  //image1.png