public class MainActivity extends Activity implements OnItemClickListener,OnItemLongClickListener
{
    
	String tishiString []={"1.单机可以编辑备忘录","2.单机可以编辑备忘录","3.","4.","5.","6.","7.","8.","9.","10.",};
	private ListView lv;
	ArrayAdapter<String>tishiAdapter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        lv=(ListView) findViewById(R.id.listView);
        tishiAdapter=new ArrayAdapter(this, android.R.layout.simple_expandable_list_item_1, tishiString); 
        lv.setAdapter(tishiAdapter);
        lv.setOnItemClickListener(this);
        lv.setOnItemLongClickListener(this);
    }
		
	@Override
	public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
		// TODO Auto-generated method stub
		Intent it =new Intent(this,EditActivty.class);
		//intent.putExtra("编号", arg2+1);
		it.putExtra("备忘", tishiString[arg2]);
		//it.putExtra("时间", new Date().toString());//获取当前时间
		startActivityForResult(it,arg2);
	}
	@Override
	public boolean onItemLongClick(AdapterView<?> arg0, View arg1, int arg2,
			long arg3) {
		// TODO Auto-generated method stub
	    tishiString[arg2]=(arg2+1)+".";
	    tishiAdapter.notifyDataSetChanged();//数据源改变适配器更新
		return true;
	}
	
	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		// TODO Auto-generated method stub
		super.onActivityResult(requestCode, resultCode, data);
		if(resultCode==RESULT_OK)
		{
	      String str=data.getStringExtra("内容");
	      String time =data.getStringExtra("时间");
	      tishiString[requestCode]=time+"\n"+str;
	      tishiAdapter.notifyDataSetChanged();
	      Toast.makeText(this,"备忘录创建的时间是"+time, 1000).show();	  
	}
	}
}

public class EditActivty extends Activity implements OnClickListener{

   private TextView tv;

   private EditText et;

@Override

protected void onCreate(Bundle savedInstanceState) {

// TODO Auto-generated method stub

super.onCreate(savedInstanceState);

setContentView(R.layout.activity1);

    Intent it=getIntent();

    //int no=it.getIntExtra("编号", 0);

    String s=it.getStringExtra("备忘");

    //String  time =it.getStringExtra("时间");

    Button chucunbtn = (Button) findViewById(R.id.chucun_button);

    Button quxiaobtn = (Button) findViewById(R.id.quxiao_button);

    tv=(TextView) findViewById(R.id.textView);

    //tv.setText(no+".");

    tv.setText(s.substring(0, 2));

    et=(EditText) findViewById(R.id.ET);

    if(s.length()>3){

    et.setText(s.substring(2));

    }

    chucunbtn.setOnClickListener(this);

    quxiaobtn.setOnClickListener(this);

}

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

switch (v.getId()) {

case R.id.chucun_button:

Intent data=new Intent();

data.putExtra("内容" ,tv.getText()+""+et.getText());

data.putExtra("时间",new Date().toString() );

setResult(RESULT_OK, data);

finish();

break;

case R.id.quxiao_button:

setResult(RESULT_CANCELED);

finish();

break;

}

}

}