Android开发04

package com.zzx.student;

import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.content.Context;
import android.content.DialogInterface;
import android.graphics.drawable.AnimationDrawable;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.RadioGroup;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;

import com.zzx.student.db.dao.MyDBImp;
import com.zzx.student.domain.Student;

public class MainActivity extends Activity {
    //拿到需要的控件
    private ImageView iv_title;
    private EditText et_name;
    private RadioGroup rg_sex;
    private Button bt_sub;
    private ListView lv_show;
    private MyDBImp mdb ;
    private List<Student> students;
    private MyAdapter ma;
    private List< Map<String, Object>> list;
    private Map<String,Object> map;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //初始化控件
        initView();
        //设置帧动画
        showAnimation();
        //设置单击事件
        setOnClick();
        //显示事件
        showAll();
    }
    /**
     * 这里用来显示所有学生信息
     */
    private void showAll() {
        students = mdb.findall();
            list = new LinkedList<Map<String,Object>>();
            //遍历students集合
            for(Student s :students){
                map = new HashMap<String, Object>();
                String sex = s.getSex();
                int a ;
                //判断性别的图片
                if("男".equals(sex)){
                    a = R.drawable.man;
                }else{
                    a = R.drawable.woman;
                }
                //添加信息
                map.put("sex", a);
                map.put("name", s.getName());
                map.put("delete", R.drawable.no_signal_96dp);
                //添加进集合
                list.add(map);
            }
        //把自定义适配器抽取成私有的,方便优化代码
        ma = new MyAdapter(MainActivity.this, list, R.layout.simpleadapter, new String[]{"sex","name","delete"}, new int[]{R.id.show_sex,R.id.show_name,R.id.d_m});
        lv_show.setAdapter(ma);
        lv_show.setSelection(10);
        
    }
    /**
     * 这是一个自定义适配器类
     * @author msi
     *
     */
    class MyAdapter extends SimpleAdapter{

        public MyAdapter(Context context, List<? extends Map<String, ?>> data,
                int resource, String[] from, int[] to) {
            super(context, data, resource, from, to);
        }
        
    }
    
    /**
     * 这个方法用来设置listView的删除事件
     */
    public void deleteMe(View view){
        //设置警告信息
        AlertDialog.Builder adb = new Builder(MainActivity.this);
        adb.setTitle("警告");
        //找到父控件,通过父控件找到子控件,获取要删除的信息
        View vp = (View) view.getParent();
        final String name = ((TextView)vp.findViewById(R.id.show_name)).getText().toString();
        adb.setMessage("您是否要删除" + name + "的信息");
        adb.setPositiveButton("确定", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                Toast.makeText(MainActivity.this, "删除成功", 0).show();
                mdb.delete(name);
                //刷新一下界面
                showAll(); 
            }
        });
        //取消操作
        adb.setNegativeButton("取消", new DialogInterface.OnClickListener() {
            
            @Override
            public void onClick(DialogInterface dialog, int which) {
                Toast.makeText(MainActivity.this, "取消成功", 0).show();
            }
        });
        adb.show();
    }
    /**
     * //设置保存信息事件
     */
    private void setOnClick() {
        
        bt_sub.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                String name = et_name.getText().toString().trim();
                //判断姓名是否为空
                if(TextUtils.isEmpty(name)){
                    Toast.makeText(MainActivity.this, "姓名不能为空", 0).show();
                    return;
                }
                //获取性别
                String sex = "男";
                switch (rg_sex.getCheckedRadioButtonId()) {
                case R.id.rb_man:
                    sex = "男";
                    break ;
                case R.id.rb_woman:
                    sex = "女";
                    break;
                }
                Toast.makeText(MainActivity.this, "添加成功", 0).show();
                //添加进数据库,
                mdb.add(name, sex);
                showAll();
            }

        });
    }
    /**
     * 这个方法用来做标题动画效果
     */
    private void showAnimation() {
        iv_title.setBackgroundResource(R.drawable.myantimation);
        //转换成动画资源
        AnimationDrawable anim = (AnimationDrawable) iv_title.getBackground();
        //开始播放
        anim.start();
    }
    /**
     * 初始化控件
     */
    private void initView() {
        iv_title = (ImageView) findViewById(R.id.imgtitle);
        et_name = (EditText) findViewById(R.id.ed_name);
        rg_sex = (RadioGroup) findViewById(R.id.rg_sex);
        bt_sub = (Button) findViewById(R.id.submit);
        lv_show = (ListView) findViewById(R.id.lv_showall);
        mdb = new MyDBImp(MainActivity.this);
    }

    
}

<LinearLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    >

    <ImageView 
        android:id="@+id/imgtitle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        />
     <EditText
        android:id="@+id/ed_name"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:hint="@string/studentname"
        android:textSize="22sp" />
    <TextView 
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/selectsex"
        android:textSize="22sp"
        />
    <RadioGroup 
         android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/rg_sex"
        android:orientation="horizontal"
        >
            <RadioButton  
                  android:layout_width="0dp"
                  android:layout_weight="1"
                android:layout_height="wrap_content"
                android:text="@string/rb_man"
                android:id="@+id/rb_man"
                />

          

              <RadioButton
                  android:id="@+id/rb_woman"
                  android:layout_width="0dp"
                  android:layout_weight="1"
                  android:layout_height="wrap_content"
                  android:text="@string/rb_woman" />

    </RadioGroup>
    <Button 
         android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:id="@+id/submit"
          android:text="@string/bt_sb" 
        />
    <ListView 
        android:fastScrollEnabled="true"
        android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:id="@+id/lv_showall"
        >
        
        
    </ListView>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >
    
    <ImageView 
     android:id="@+id/show_sex"
    android:layout_width="30dp"
    android:layout_height="30dp"
            />

    <TextView
        android:id="@+id/show_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_toRightOf="@id/show_sex"
        android:textSize="30dp" />
    
     <ImageView 
     android:layout_alignParentRight="true"
     android:id="@+id/d_m"
    android:layout_width="30dp"
    android:layout_height="30dp"
    android:src="@drawable/no_signal_96dp"
    android:onClick="deleteMe"
        />


</RelativeLayout>