How do I properly implement View.OnClickListener and use it with a TextView?

Question

I am intending to assign a click listener to a TextView. First I implemented View.OnClickListener in MainActivity:

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    ...
    TextView title = findViewById(R.id.title);
    title.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            ...
        }
    });
}

Then I set android:clickable="true" on the TextView.

However, despite overriding the onClick mehtod, an error pops up saying:

Class 'MainActivity' must either be declared abstract or implement abstract method 'onClick(View)' in 'OnClickListener'

What can I do to dodge this error?

Answer 1

The root of the issue is with your activity declaration and there are two ways to deal with it.

• Let your activity implement the View.onClickListener and you pass the activity to the textview's setOnClickListener

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    ...
    TextView title = findViewById(R.id.title);
    title.setOnClickListener(this);

    TextView title2 = findViewById(R.id.textview2);
    title2.setOnClickListener(this);


   // implement the onClick method in your MainActivity class
        @Override
        public void onClick(View view) {
            switch(view.getId()){
               case R.id.TextView1 : //logic for textview1
                   break;

               case R.id.TextView2: // logic for textview2
                   break;
            }
        }
}

• Modify your Activity function declaration and create a a new instance of View.OnClickListener in setOnClickListener method.

public class MainActivity extends AppCompatActivity {
    ...
    TextView title = findViewById(R.id.title);
    title.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            ...
        }
    });
}