android初心者です。 class ButtonClickListener implements OnClickListener のButtonClickListenerのとこだけエラーがでていますどなたか修正お願いします。

[勇輝井上]

package example.android.buttonclicksample;

import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.app.Activity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.Toast;
import android.os.Build;
import android.view.View.OnClickListener;
import android.widget.EditText;

public class ButtonClickSampleActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_button_click_sample);

        if (savedInstanceState == null) {
            getSupportFragmentManager().beginTransaction()
                    .add(R.id.container, new PlaceholderFragment())
                    .commit();
        }
        Button bt1= (Button)findViewById(R.id.bt_button);
        bt1.setOnClickListener(new ButtonClickListener());
       
 }

        class ButtonClickListener implements OnClickListener{
         public void Onclick(View v){
          EditText input= (EditText)findViewById(R.id.ed_text);
          Toast.makeText(ButtonClickSampleActivity.this, input.getText(), Toast.LENGTH_SHORT).show();
         }
        }
       

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

    /**
     * A placeholder fragment containing a simple view.
     */
    public static class PlaceholderFragment extends Fragment {

        public PlaceholderFragment() {
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.fragment_button_click_sample, container, false);
            return rootView;
        }
    }

}