CODEWITHSUNDEEP
android
Rin Zin
Rin Zin

Reputation: 13

setOnCheckedChangeListener(this) error

I'm beginner in android. I read some books. I create checkbox

import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;

public class MainActivity extends AppCompatActivity implements OnCheckedChangeListener {
CheckBox cb;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
    fab.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                    .setAction("Action", null).show();

            cb = (CheckBox) findViewById(R.id.mycheckbox);
            cb.setOnCheckedChangeListener(this);
        }
    });
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}

@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
    if (isChecked) {
        cb.setText("Checked");
    } else {
        cb.setText("UnCheck");
    }
}

}

When use cb.setOnCheckedChangeListener(this); android studio error: setOnCheckedChangeListener(android.widget.CompoundButton.OnCheckedChangeListener) in CompoundButton cannot be applied (anonymous android.view.View.onClickListener)

If i change code such as:

cb.setOnCheckedChangeListener(new OnCheckedChangeListener() {

    @Override
    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        //do stuff

    }
});

Then ok

Can you help me. i want to use "this".

Upvotes: 1

Views: 1765

Answers (1)

ρяσѕρєя K
ρяσѕρєя K

Reputation: 132982

Use MainActivity.this instead of this :

 cb.setOnCheckedChangeListener(MainActivity.this);

Because in current code this refer to the Button onClick method context instead of MainActivity class in which OnCheckedChangeListener interface in implemented.

Upvotes: 2

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