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Android

Posted by Farouk Charkas
Farouk Charkas
1,957 Points

What does this error mean?

I am very new to Android Development so It would be nice if the answer is dummied up for me. I am getting this error: Error:(9, 18) Resource id cannot be an empty string (at 'id' with value '@+id/').

2 Answers

Enrique Munguía
Enrique Munguía
14,311 Points
Enrique Munguía
Enrique Munguía
14,311 Points

The id is an important attribute because it identifies uniquely a specific element, for that reason you must set the id and not left it blank.

android:id="@+id/myLabel"

instead of

android:id="@+id/"
Farouk Charkas
Farouk Charkas
1,957 Points

Thank you Enrique Munguia,,

But now I am faced with two more errors: #1 Error:(56, 5) error: class, interface, or enum expected and #2 **Error:Execution failed for task ':app:compileDebugJava'.

Compilation failed; see the compiler error output for details.**

Farouk Charkas
Farouk Charkas
1,957 Points
Farouk Charkas
Farouk Charkas
1,957 Points

This is my code:

**package everingapplications.funfacts;

import android.support.v7.app.ActionBarActivity; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Button; import android.widget.TextView;

public class FunFactsActivity extends ActionBarActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_fun_facts);
    // Declaring our View variables
    final TextView factLabel = (TextView) findViewById(R.id.textView);
    Button showFactButton = (Button) findViewById(R.id.showFactButton);
    View.OnClickListener listener = new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            String fact = "Ostriches can run faster than horses";
            factLabel.setText(fact);

        }
    };
    showFactButton.setOnClickListener(listener);
    }

}



@Override

lic boolean onOptionsItemSelected(MenuItem item) { public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.menu_fun_facts, menu); return true; }

@Override
pub// 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);
}**
Farouk Charkas
Farouk Charkas
1,957 Points

package everingapplications.funfacts;

import android.support.v7.app.ActionBarActivity; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Button; import android.widget.TextView;

public class FunFactsActivity extends ActionBarActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_fun_facts);
    // Declaring our View variables
    final TextView factLabel = (TextView) findViewById(R.id.textView);
    Button showFactButton = (Button) findViewById(R.id.showFactButton);
    View.OnClickListener listener = new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            String fact = "Ostriches can run faster than horses";
            factLabel.setText(fact);

        }
    };
    showFactButton.setOnClickListener(listener);
    }

}



@Override

lic boolean onOptionsItemSelected(MenuItem item) { public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.menu_fun_facts, menu); return true; }

@Override
pub// 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);
}
Farouk Charkas
Farouk Charkas
1,957 Points

package everingapplications.funfacts;

import android.support.v7.app.ActionBarActivity; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Button; import android.widget.TextView;

public class FunFactsActivity extends ActionBarActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_fun_facts);
    // Declaring our View variables
    final TextView factLabel = (TextView) findViewById(R.id.textView);
    Button showFactButton = (Button) findViewById(R.id.showFactButton);
    View.OnClickListener listener = new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            String fact = "Ostriches can run faster than horses";
            factLabel.setText(fact);

        }
    };
    showFactButton.setOnClickListener(listener);
    }

}



@Override

lic boolean onOptionsItemSelected(MenuItem item) { public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.menu_fun_facts, menu); return true; }

@Override
pub// 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);
}