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();

            }

        });

    }

}