startActivityForResult方法解决Activity之间数据的保存问题

res/layout/ex03_10.xml

<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <RadioGroup android:layout_height="wrap_content" 
    			android:layout_width="wrap_content" 
    			android:id="@+id/rgSex" 
    			android:orientation="horizontal" 
    			android:layout_x="100dip" 
    			android:layout_y="60dip">
        <RadioButton android:text="@string/sex_man" 
        		     android:layout_height="wrap_content" 
        		     android:layout_width="wrap_content" 
        		     android:checked="true" 
        		     android:id="@+id/radio_man"></RadioButton>
        <RadioButton android:text="@string/sex_woman" 
        			 android:layout_height="wrap_content" 
        			 android:layout_width="wrap_content" 
        			 android:id="@+id/radio_woman"></RadioButton>
    </RadioGroup>
    <EditText android:layout_height="wrap_content" 
    		  android:layout_width="wrap_content" 
    		  android:text="EditText" 
    		  android:id="@+id/etWeight" 
    		  android:layout_x="97dip" 
    		  android:layout_y="133dip"></EditText>
    <Button android:text="Button" 
    		android:layout_height="wrap_content" 
    		android:layout_width="wrap_content" 
    		android:id="@+id/btn" 
    		android:layout_x="120dip" 
    		android:layout_y="212dip"></Button>
</AbsoluteLayout>

res/layout/ex03_10_01.xml

<?xml version="1.0" encoding="utf-8"?>
<AbsoluteLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent">
    <TextView android:layout_height="wrap_content" 
    	      android:layout_width="wrap_content" 
    	      android:text="TextView" 
    	      android:layout_x="126dip" 
    	      android:layout_y="144dip" 
    	      android:id="@+id/tvResult"></TextView>
    <Button android:layout_width="wrap_content" 
    		android:layout_x="125dip" 
    		android:layout_height="wrap_content" 
    		android:layout_y="248dip" 
    		android:id="@+id/btnBk" 
    		android:text="@string/back"></Button>
</AbsoluteLayout>

src/EX03_10.java

package gphone.ex03_10;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;
public class EX03_10 extends Activity {
	Button btn=null;
	EditText etWeight=null;
	RadioGroup rgSex=null;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.ex03_10);
        btn=(Button)findViewById(R.id.btn);
        etWeight=(EditText)findViewById(R.id.etWeight);
        rgSex=(RadioGroup)findViewById(R.id.rgSex);
        btn.setOnClickListener(new Button.OnClickListener(){

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				String strWeight=etWeight.getText().toString();
				
				String strSex="女";
				if(rgSex.getCheckedRadioButtonId()==R.id.radio_man)
				{
					strSex="男";
				}
				else
				{
					strSex="女 ";
				}
				Bundle b=new Bundle();
				b.putString("Weight", strWeight);
				b.putString("Sex", strSex);
				Intent intent=new Intent();
				intent.putExtras(b);
				intent.setClass(EX03_10.this,EX03_10_01.class);
				startActivityForResult(inte

src/EX03_10_02.java

package gphone.ex03_10;

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

public class EX03_10_01 extends Activity{
	TextView tvResult=null;
	Button btnBk=null;
	Intent intent=null;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.ex03_10_01);
		tvResult=(TextView)findViewById(R.id.tvResult);
		intent=this.getIntent();
		Bundle b=intent.getExtras();
		String strWeight=b.getString("Weight");
		String strSex=b.getString("Sex");
		tvResult.setText("结果为："+strWeight+","+strSex);
		
		btnBk=(Button)findViewById(R.id.btnBk);
		btnBk.setOnClickListener(new Button.OnClickListener(){

			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				EX03_10_01.this.setResult(RESULT_OK, intent);
				EX03_10_01.this.finish();
			}
			
		});
		
	}

}

运行结果