Butterknife Conversion Activity

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import com.example.android.R;

import butterknife.ButterKnife;
import butterknife.InjectView;

/**
 * Headless activity to convert view declarations to view injections.
 */
public class ButterknifeConversionActivity extends Activity {

    //! include tags are not yet supported https://github.com/inmite/android-butterknife-zelezny/issues/8
    
    private static final String LOG_TAG = "ButterknifeConversionActivity";
    @InjectView(R.id.toolButterknifeInput) EditText toolButterknifeInput;
    @InjectView(R.id.toolButterknifeButton) Button toolButterknifeButton;
    @InjectView(R.id.toolButterknifeButton2) Button toolButterknifeButton2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        Log.i(LOG_TAG, "ButterknifeConversionActivity onCreate");
        super.onCreate(savedInstanceState);
        setContentView(R.layout.tool_butterknife_conversion);
        ButterKnife.inject(this);
        toolButterknifeButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                toolButterknifeInput.setText("");
            }
        });
        toolButterknifeButton2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                convertViewDeclarationToViewInjection(String.valueOf(toolButterknifeInput.getText()));
            }
        });
    }

    /**
     * Converts this:
     * postedBy = (TextView) layout.findViewById(R.id.mainRowPostedByText);
     * to this:
     *
     * @param string
     * @return
     * @InjectView(R.id.mainRowPostedByText) TextView postedBy;
     */
    public void convertViewDeclarationToViewInjection(String string) {
        String ret = "";
        String[] lines = string.split("\\n");
        for (String line : lines) {
            ret = ret + convertViewDeclarationLine(line) + "\n";
        }
        Toast.makeText(this, "Converted, text is in logs", Toast.LENGTH_SHORT).show();
        Log.i(LOG_TAG, "\n" + ret);
    }

    public String convertViewDeclarationLine(String string) {
        string = string.trim();
        Log.i(LOG_TAG, "convertViewDeclarationLine : " + string);
        final String varString = string.split(" ")[0];
        final String idString = string.substring(string.lastIndexOf("(") + 1, string.lastIndexOf(")"));
        final String type = string.substring(string.indexOf("(") + 1, string.indexOf(")"));
        final String returnText = "@InjectView(" + idString + ") " + type + " " + varString + ";";
        return returnText;
    }
}