onClickListner无法传递“ this”参数错误

Question

What am I doing wrong here? I can't get pass "this" argument Error with the onClickListner.

 public void onClick(View V){
            txt.setText("Button is Clicked");

            Intent i = new Intent(Intent.ACTION_CALL);
            String encodedHash = Uri.encode("#");
            i.setData(Uri.parse("tel:"+"*804"+encodedHash));

            if (ActivityCompat.checkSelfPermission(this,
                    Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED)
            {
                return;
            }

            startActivity(i);
        }

Answer 1

Please implement View.OnClickListener because you must implement this interface alongside onClick() method. Or you can try this code below:

public Button btnClick;
btnClick=view.findViewById(R.id.btn_click);

btnClick.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
  txt.setText("Button is Clicked");

        Intent i = new Intent(Intent.ACTION_CALL);
        String encodedHash = Uri.encode("#");
        i.setData(Uri.parse("tel:"+"*804"+encodedHash));

        if (ActivityCompat.checkSelfPermission(this,
                Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED)
        {
            return;
        }

        startActivity(i);
        }
    });

Answer 2

Your question doesn't provide enough information but I think you are getting an error about passing an OnClickListener instead of an Activity because you're defining an inner anonymous class so this refers to this anonymous class. If want to access your outer/container class you should call it like: OuterClass.this or ( this@OuterClass in kotlin):

public void onClick(View V){ txt.setText("Button is Clicked");

        Intent i = new Intent(Intent.ACTION_CALL);
        String encodedHash = Uri.encode("#");
        i.setData(Uri.parse("tel:"+"*804"+encodedHash));

        if (ActivityCompat.checkSelfPermission(MyActivity.this,
                Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED)
        {
            return;
        }

        startActivity(i);
    }