android 之得到新打开Activity 关闭后返回的数据

现在有这样的功能需求。在一个Activity (A)中打开另一个Activity(B).在另一个B 中添写数据，当这个B关闭时，把在B中填写的

数据返回给A,并写显示出。这样就有必要用今天的功能了。

以下为是代码。也就是Activity (A)

package com.hkrt.intent;

import com.hkrt.domain.Person;

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.Toast;

public class IntentDemoActivity extends Activity {
    /** Called when the activity is first created. */
	private static final String LOG="IntentDemoActivity";
    @Override
    public void onCreate(Bundle savedInstanceState) {
    	Log.i(LOG, "onCreate");
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Button button =(Button)this.findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View v) {
			 Intent intent = new Intent(IntentDemoActivity.this,OtherActivity.class);
			 // 方法一
//			 intent.putExtra("name","张三");
			 //方法二
			 Bundle bun = new Bundle();
			 bun.putString("name","张三");
			 bun.putInt("age", 18);
			 Person per = new Person("张三",5896.20);
			 bun.putSerializable("person", per);
			 intent.putExtras(bun);
//			 startActivity(intent);
			 startActivityForResult(intent, 10); 
			}
		});
    }
    //接收新的Activiity 返回的结果
    /**
     * requestCode:10
     * resultCode:100
     * */
    @Override
    protected void onActivityResult(int requestCode,int resultCode,Intent data){
    	Toast.makeText(this, data.getExtras().getString("name")+"requestCode:"+requestCode+"resultCode"+resultCode, 1).show();
    	super.onActivityResult(requestCode, resultCode, data);
    }
	@Override
	protected void onStart() {
		Log.i(LOG, "onStart");
		super.onStart();
	}
	
	@Override
	protected void onResume() {
		Log.i(LOG, "onResume");
		super.onResume();
	}
	

	@Override
	protected void onPause() {
		Log.i(LOG, "onPause");
		super.onPause();
	}

	@Override
	protected void onRestart() {
		Log.i(LOG, "onRestart");
		super.onRestart();
	}


	@Override
	protected void onStop() {
		Log.i(LOG, "onStop");
		super.onStop();
	}

	@Override
	protected void onDestroy() {
		Log.i(LOG, "onDestroy");
		super.onDestroy();
	}
}

Activity(B).

package com.hkrt.intent;


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

import com.hkrt.domain.Person;

public class OtherActivity extends Activity {
  private static final String LOG="OtherActivity";
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		Log.i(LOG, "onCreate");
		super.onCreate(savedInstanceState);
		setContentView(R.layout.other);
		Intent intent = this.getIntent();
		//方法一
//		String name = intent.getStringExtra("name");
		//方法二
		Bundle  bun =  intent.getExtras();
		String name1 = bun.getString("name");
		int age = bun.getInt("age",10);
		TextView textView = (TextView)this.findViewById(R.id.textView);
		
		Person per =	(Person)bun.getSerializable("person");
		textView.setText("姓名："+name1+"\t年龄："+age+"\tperson:"+per.getName()+"\tmoney:"+per.getMoney());
		
		Button button = (Button)this.findViewById(R.id.shut_button);
		button.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View v) {
				Intent intent = new Intent();
				intent.putExtra("name", "hello android ,i am comming");
				setResult(100, intent);
				OtherActivity.this.finish();
			}
		});
	}
	@Override
	protected void onResume() {
		Log.i(LOG, "onResume");
		super.onResume();
	}
	@Override
	protected void onStart() {
		Log.i(LOG, "onStart");
		super.onStart();
	}
	@Override
	public boolean onKeyDown(int keyCode, KeyEvent event)
	{
		// 返回按键
		if (keyCode == KeyEvent.KEYCODE_BACK)
		{
			new AlertDialog.Builder(this)
					.setCancelable(false)
					.setIcon(android.R.drawable.btn_dialog)
					.setTitle("退出").
					setMessage("您确认要退出程序吗？")
					.setPositiveButton("确定", new DialogInterface.OnClickListener()
					{
						public void onClick(DialogInterface dialog, int which)
						{
							//关闭程序的核心方法
//							OtherActivity.this.finish();
							dialog.cancel();
						}
					})
					.setNegativeButton("取消", new DialogInterface.OnClickListener()
					{
						
						public void onClick(DialogInterface dialog, int which)
						{
							dialog.cancel();
						}
					}).show();
		}
		return true;
	}

    
}

第一个Activity .页面只有一个button.第二个Acivity 有一个TextView 和一个Button.当点击button时，返回到第一个Activity.页面比较简单。

结果图：