startActivityForResult 页面跳转回调

import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Color;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.GridView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {

    private Button button_add;
    private GridView gv;
     List<Map<String, String>> list = new ArrayList<Map<String, String>>();

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {

        if (requestCode == 1 && resultCode == 1) {
            // 获取map集合
            final HashMap<String, String> map = (HashMap<String, String>) data
                    .getSerializableExtra("map");

            // 将map集合添加到list集合中

            list.add(map);

            // 为gridview设置适配器
            final SimpleAdapter adapter = new SimpleAdapter(MainActivity.this, list,
                    R.layout.item, new String[] { "name", "author" },
                    new int[] { R.id.item_name, R.id.item_author });
            gv.setAdapter(adapter);

            // 为gv设置条目点击监听事件
            gv.setOnItemClickListener(new OnItemClickListener() {

                @Override
                public void onItemClick(AdapterView<?> parent, View view,
                        final int position, long id) {

                gv.setSelector(android.R.color.holo_red_light);

                    new AlertDialog.Builder(MainActivity.this)
                            .setTitle("确认删除")
                            .setMessage("确认删除吗？")
                            .setNegativeButton("取消",
                                    new DialogInterface.OnClickListener() {

                                        @Override
                                        public void onClick(
                                                DialogInterface dialog,
                                                int which) {
                                            Toast.makeText(MainActivity.this,
                                                    "您放弃了删除", 0).show();

                                        }
                                    }).setPositiveButton("确认", new DialogInterface.OnClickListener() {

                                        @Override
                                        public void onClick(DialogInterface dialog, int which) {

                                            Toast.makeText(MainActivity.this,
                                                    "删除成功", 0).show();
                                            list.remove(position);
                                            adapter.notifyDataSetChanged();
                                        }
                                    }).show();

                }
            });

        }

    }

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

        // 寻找控件
        findView();

        // 为添加按钮设置点击监听事件
        setClick();
    }

    private void setClick() {

        button_add.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                // 回调跳转到添加界面
                Intent intent = new Intent(MainActivity.this, AddActivity.class);
                startActivityForResult(intent, 1);

            }
        });

    }

    private void findView() {

        button_add = (Button) findViewById(R.id.button_add);
        gv = (GridView) findViewById(R.id.gv);
        TextView tv = (TextView) findViewById(R.id.tv_manager);

    }

}

import java.util.HashMap;
import java.util.Map;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.text.TextUtils;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class AddActivity extends Activity {

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

        //找到该布局文件下的控件
        final EditText edit_name=(EditText) findViewById(R.id.edit_name);
        final EditText edit_author=(EditText) findViewById(R.id.edit_author);
        Button button_a=(Button) findViewById(R.id.button_a);

        //点击添加按钮实现监听事件
        button_a.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {

                //获取输入框中的信息
                String name = edit_name.getText().toString();
                String author = edit_author.getText().toString();

                if(TextUtils.isEmpty(name))
                {
                    Toast.makeText(AddActivity.this, "图书名字不能为空", 0).show();
                    return;
                }

                if(TextUtils.isEmpty(author))
                {
                    Toast.makeText(AddActivity.this, "作者不能为空", 0).show();
                    return;
                }

                //将页面信息封存为map集合
                HashMap<String, String> map=new HashMap<String, String>();
                map.put("name", name);
                map.put("author", author);

                //将map集合存放在intent中并回调到主界面
                Intent intent = getIntent();
                intent.putExtra("map", map);
                setResult(1, intent);

                //将本界面关闭
                finish();

            }
        });
    }

}