MainActivity
[java]
package com.example.clipboard;

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

public class MainActivity extends Activity{

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

}

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

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case 1:
switch (resultCode) {
case 2:
setTitle(data.getStringExtra("key01"));
break;

default:
break;
}
break;

default:
break;
}
}

public void onClick_StartAnother(View view){
Intent intent = new Intent(this,MainActivity01.class);
startActivityForResult(intent, 1);
}
}
[/java]
MainActivity01
[java]
package com.example.clipboard;

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

public class MainActivity01 extends Activity {
private EditText myEdittext;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_activity01);

myEdittext = (EditText) findViewById(R.id.edittext);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main_activity01, menu);
return true;
}

public void onClick_Button(View view){
String myTitle = myEdittext.getText().toString();
Intent intent = new Intent();
intent.putExtra("key01", myTitle);
setResult(2,intent);
finish();
}
}
[/java]
完整项目文件地址
http://pan.baidu.com/s/1bnpaWEF