返回数据到前一个activity-startActivityForResult

package xyq.demo;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioButton;

public class EX03_11Activity extends Activity {
RadioButton nv,nan;
EditText myEdit;
Button enterButton;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

nv = (RadioButton)findViewById(R.id.radioButton1);
nan = (RadioButton)findViewById(R.id.radioButton2);

enterButton = (Button)findViewById(R.id.MyButton);
enterButton.setOnClickListener(new OnClickListener(){

public void onClick(View arg0) {
// TODO Auto-generated method stub
myEdit = (EditText)findViewById(R.id.myEdit);
Double height = Double.parseDouble(myEdit.getText().toString());
Log.v("test", ""+height);
String sex ="";
if(nv.isChecked()){
sex="M";
}else{
sex="F";
}
Intent intent = new Intent(EX03_11Activity.this,myresult.class);
Bundle bundle = new Bundle();
bundle.putDouble("height", height);
bundle.putString("xingbie", sex);
intent.putExtras(bundle);
startActivityForResult(intent, 0);
}});

}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
//super.onActivityResult(requestCode, resultCode, data);
switch(resultCode)
{
case RESULT_OK:
Bundle bundle = data.getExtras();
String sex = bundle.getString("xingbie");
Double height = bundle.getDouble("height");

Log.v("test", "The sex is "+sex+"  "+"The height is  "+height);
myEdit.setText(""+height);
if(sex.equals("M")){
nv.setChecked(true);
}else{
nan.setChecked(true);
}
break;
default:
break;
}
}

}

package xyq.demo;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class myresult extends Activity{
TextView myText;
Button myButton;
Intent  intent;
Bundle bundle;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.mylayout);

myText = (TextView)findViewById(R.id.myText);
myButton = (Button)findViewById(R.id.myButton);

intent = this.getIntent();
bundle = intent.getExtras();
String sex = bundle.getString("xingbie");
Double height = bundle.getDouble("height");
//Log.v("test", "The sex is "+sex+"  "+"The height is  "+height);

String sexText;

if(sex.equals("M")){
sexText = "女性";
}else{
sexText = "男性";
}

myText.setText("你是一位"+sexText+"\n 你的身高是"+height+"\n 你的体重是"+getWeight(height, sex));

myButton.setOnClickListener(new Button.OnClickListener(){

public void onClick(View v) {
// TODO Auto-generated method stub
bundle = intent.getExtras();
String sex = bundle.getString("xingbie");
Double height = bundle.getDouble("height");
Log.v("test", "The sex is "+sex+"  "+"The height is  "+height);

myresult.this.setResult(RESULT_OK, intent);
myresult.this.finish();
}});
}

private Double getWeight(Double height,String sex){

Double weight;
if(sex.equals("M")){
weight = (height-70)*0.6;
}else{
weight = (height-80)*0.7;
}
return weight;
}
}