Caused by: java.lang.NumberFormatException: unable to parse '请输入第一个数字....' as integer

开始我写的代码是这样的：

package org.lxh.demo;


import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class Hello extends Activity {
	private EditText num1 = null;
	private EditText num2 = null;
	private int numOne=0;
	private int numTwo=0;
	private Button butAdd = null;
	private TextView result = null;
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		super.setContentView(R.layout.main);

		
		 num1 = (EditText) super.findViewById(R.id.num1); 
		 numOne=Integer.parseInt(num1.getText().toString());
		 
		 num2 = (EditText) super.findViewById(R.id.num2); 
		 numTwo=Integer.parseInt(num2.getText().toString());
		 
		 butAdd= (Button) super.findViewById(R.id.add);	
		 
		 result= (TextView) super.findViewById(R.id.result);	
		 
		 butAdd.setOnClickListener(new OnClickListener() {      
			 public void onClick(View v) {  
				 
				 result.setText(String.valueOf(numOne+numTwo));
           }         
         });
	}
}

 需要数字的时候，你给了个 请输入第一个数字....---- 无法把 请输入第一个数字.... 转换为整数后来我改正了代码：
package org.lxh.demo;


import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class Hello extends Activity {
	private EditText num1 = null;
	private EditText num2 = null;
	private int numOne=0;
	private int numTwo=0;
	private Button butAdd = null;
	private TextView result = null;
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		super.setContentView(R.layout.main);

		
		 num1 = (EditText) super.findViewById(R.id.num1); 
		
		 
		 num2 = (EditText) super.findViewById(R.id.num2); 
		
		 
		 butAdd= (Button) super.findViewById(R.id.add);	
		 
		 result= (TextView) super.findViewById(R.id.result);	
		 
		 butAdd.setOnClickListener(new OnClickListener() {      
			 public void onClick(View v) {  
				 numOne=Integer.parseInt(num1.getText().toString());
				 numTwo=Integer.parseInt(num2.getText().toString());
				 result.setText(String.valueOf(numOne+numTwo));
           }         
         });
	}
}