在主程序中 调用activity2的方法改为startActivityForResult（intent，0） 0代表下一个Activity要返回值的依据，可指定为自行定义的参考标示符。程序重写onactivityresult（）这个方法，使程序在收到result后，重写加载写回原先输入的值。（在AS中重写结果报错，我删去了@override）
activity主程序的代码
package com.administrator.testall;import android.os.Bundle;import android.provider.MediaStore;import android.support.v7.app.ActionBarActivity;import android.content.Intent;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.widget.RadioButton;import android.widget.RadioGroup;public class ChangeTest01 extends ActionBarActivity { private EditText et; private RadioButton rg1; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_change_test01); Button button01 = (Button) findViewById(R.id.button1); button01.setOnClickListener(new Button.OnClickListener() { public void onClick(View v) { EditText et = (EditText) findViewById(R.id.editText1); double editText1 = Double.parseDouble(et.getText().toString()); //取值 String choose = ""; RadioButton rg1 = (RadioButton) findViewById(R.id.radioButton); //取复选框值 if(rg1.isClickable()) { choose = "M"; } else choose = "F"; Intent intent = new Intent(); intent.setClass(ChangeTest01.this,ChangeTest02.class); //activity却换 Bundle bundle = new Bundle(); //activity的数据传递 bundle.putDouble("edit1",editText1); //引号内为传递数据，引号后面为传递值 bundle.putString("choose",choose); intent.putExtras(bundle); //将bundle对象分配给intert； startActivityForResult(intent, 0); //调用另一个activity } } ); } protected void OnActivityResult(int requestCode,int resultCode,Intent data) { switch (resultCode) { case RESULT_OK: //取得来自activity2的数据 显示在画面上 Bundle bundle = data.getExtras(); String choose = bundle.getString("choose"); double edit1 = bundle.getDouble("edit1");; et.setText(String.valueOf(edit1)); if(choose.equals("M")) rg1.setChecked(true); break; default: break; } }} 注意 这里不需要使用@Override重写
activity2的代码如下
package com.administrator.testall;import android.content.Intent;import android.os.Bundle;import android.support.v7.app.ActionBarActivity;import android.widget.Button;import android.widget.TextView;import android.view.View;public class ChangeTest02 extends ActionBarActivity { Bundle bundle; Intent intent; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_change_test02); intent = this.getIntent(); bundle = this.getIntent().getExtras(); //取得intent中的bundle对象 String choose = bundle.getString("choose"); //取得bundle对象中的数据 double edit1 = bundle.getDouble("edit1"); String chooseText = ""; if(choose.equals("M")) { chooseText="A"; }else chooseText="B"; TextView textView1 = (TextView) findViewById(R.id.textView1); textView1.setText(chooseText); TextView textView2 = (TextView) findViewById(R.id.textView2); textView2.setText(String.valueOf(edit1)); //double转string Button button1 = (Button) findViewById(R.id.button1); button1.setOnClickListener(new Button.OnClickListener() { public void onClick(View v) { ChangeTest02.this.setResult(RESULT_OK,intent); //返回result到上一个activity ChangeTest02.this.finish(); //结束这个activity } } ); }}