atb1194

Hello! I just started android development, so I don't fully understand all of the jargon I type...

I came across a set of tutorials that described how to create and use radio buttons to change the gravity and style of text.

Here is my code:

package com.androidbook.myfirstandroidapp;

import android.app.Activity;[...]


public class tutorialOne extends Activity implements OnCheckedChangeListener{

TextView textOut;
EditText getInput;
RadioGroup Gunit;
RadioGroup Sunit;

@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.tutorial1);

textOut = (TextView) findViewById(R.id.tvGetInput);
getInput = (EditText) findViewById(R.id.etInput);
Button ok = (Button) findViewById(R.id.bOK);
Gunit = (RadioGroup) findViewById(R.id.rgGravity);
Sunit = (RadioGroup) findViewById(R.id.rgStyle);

Gunit.setOnCheckedChangeListener(this);

ok.setOnClickListener(new View.OnClickListener() {

public void onClick(View v) {
// TODO Auto-generated method stub
textOut.setText(getInput.getText());
}
});

}


public void onCheckedChanged(RadioGroup group, int checkedId) {

switch (checkedId){

case R.id.rbLeft:
textOut.setGravity(Gravity.LEFT);
break;
case R.id.rbCenter:
textOut.setGravity(Gravity.CENTER);
break;
case R.id.rbRight:
textOut.setGravity(Gravity.RIGHT);
break;
case R.id.rbNormal:
textOut.setTypeface(null, Typeface.NORMAL);
break;
case R.id.rbBold:
textOut.setTypeface(null, Typeface.BOLD);
break;
case R.id.rbItalics:
textOut.setTypeface(null, Typeface.ITALIC);
break;

}

}

}

The "tutorialOne" part above is an error according to Eclipse: "The type tutorialOne must implement the inherited abstract method RadioGroup.OnCheckedChangeListener.onCheckedChange d(RadioGroup, int)"

I tried to use the quick fix but another error came up: "Can not implement the missing methods, either due to compile errors or the projects build path does not resolve all dependencies."

What can I do?

swarmconnect

It should just be a matter of adding the "onCheckChange" method to your code. Check out the OnCheckChangeListener in the Android APIs to find the list of required methods.