黑名单项目

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.hanqi.blacklist.MainActivity"
    android:orientation="vertical">

    <ListView
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:id="@+id/lv_1">

    </ListView>

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="添加黑名单"
        android:onClick="add_OnClick"/>


</LinearLayout>

 

vvpackage com.hanqi.blacklist;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.InputType;
import android.view.ContextMenu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.hanqi.blacklist.com.hanqi.blacklist.orm.BlackList;
import com.hanqi.blacklist.com.hanqi.blacklist.orm.BlackListDAO;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {

    ListView lv_1;

    //数据访问对象
    BlackListDAO bld = new BlackListDAO(this);

    //数据集合
    ArrayList<BlackList> alb;

    BLAdapter bla;

    //长按的数据的索引
    int index;

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

        lv_1 = (ListView)findViewById(R.id.lv_1);

        //增加上下文菜单,设置创建菜单的监听器

        lv_1.setOnCreateContextMenuListener(this);

        //获取数据
        alb = bld.getAll();

        //显示数据(listview  适配器  adapter)
        //adapter
        bla = new BLAdapter();

        lv_1.setAdapter(bla);

    }

    //重写创建上下文菜单的方法
    @Override
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
        super.onCreateContextMenu(menu, v, menuInfo);

        menu.add(0, 1, 1, "修改");
        menu.add(0, 2, 2, "删除");

        //获取长按的数据信息
        //1.得到菜单信息
        AdapterView.AdapterContextMenuInfo acmi = (AdapterView.AdapterContextMenuInfo)menuInfo;

        //2.得到数据在集合中的索引
        index = acmi.position;
    }

    //响应菜单点击的回调方法
    @Override
    public boolean onContextItemSelected(MenuItem item) {

        switch (item.getItemId())
        {
            case 1:
                //修改
                final EditText editText = new EditText(this);
                editText.setHint("输入电话号码");
                editText.setInputType(InputType.TYPE_CLASS_PHONE);

                editText.setText(alb.get(index).getPhoneNumber());

                new AlertDialog.Builder(this)
                        .setTitle("修改黑名单")
                        .setView(editText)
                        .setCancelable(false)
                        .setNegativeButton("取消", null)
                        .setPositiveButton("保存", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {

                                //1.得到新数据的实体类
                                //赋值：
                                // 1)传值；复制新的值再传递；值类型；
                                // 2)传址；传递的是内存地址，指向同一个对象引用类型
                                BlackList blacklist = alb.get(index);

                                blacklist.setPhoneNumber(editText.getText().toString());

                                //2.调用DAO的update()
                                if (bld.update(blacklist)>0)
                                {
                                    Toast.makeText(MainActivity.this, "修改成功", Toast.LENGTH_SHORT).show();

                                    //更新List

                                    //刷新列表
                                    bla.notifyDataSetChanged();
                                }
                                else
                                {
                                    Toast.makeText(MainActivity.this, "修改失败", Toast.LENGTH_SHORT).show();
                                }

                                //3.刷新ListView

//                                BlackList blacklist = new BlackList(editText.getText().toString());
//
//
//                                long k = bld.insert(blacklist);
//
//                                if (k > 0)
//                                {
//                                    Toast.makeText(MainActivity.this, "保存成功", Toast.LENGTH_SHORT).show();
//
//
//                                    blacklist.setId(k);
//                                    alb.add(0, blacklist);
//
//
//                                    bla.notifyDataSetChanged();
//                                }
//
//
//                                else
//                                {
//                                    Toast.makeText(MainActivity.this, "保存失败", Toast.LENGTH_SHORT).show();
//                                }

                            }
                        })
                        .show();
                break;
            case 2:
                //添加删除确认对话框
                new AlertDialog.Builder(this)
                        .setTitle("是否确定删除")
                        .setMessage("是否确定删除?")
                        .setCancelable(false)
                        .setNegativeButton("取消", null)
                        .setPositiveButton("确定", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {

                                //删除
                                if (bld.delete(alb.get(index).getId())>0) {

                                    Toast.makeText(MainActivity.this, "删除成功", Toast.LENGTH_SHORT).show();

                                    //更新list
                                    //alb = bld.getAll();
                                    alb.remove(index);

                                    //刷新列表
                                    bla.notifyDataSetChanged();
                                }
                                else
                                {
                                    Toast.makeText(MainActivity.this, "删除失败", Toast.LENGTH_SHORT).show();
                                }

                            }
                        })

                        .show();

                        break;
        }

        return super.onContextItemSelected(item);
    }

    //BaseAdapter的实现类
    class BLAdapter extends BaseAdapter
    {
        @Override
        public int getCount() {
            return alb.size();
        }

        @Override
        public Object getItem(int position) {
            return alb.get(position);
        }

        @Override
        public long getItemId(int position) {
            return alb.get(position).getId();
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {

            //得到数据
            BlackList blackList = alb.get(position);

            //得到视图
            if (convertView == null)
            {
                //构建视图
                convertView = new TextView(MainActivity.this);
            }

            //视图和数据做显示匹配
            TextView textView = (TextView)convertView;

            textView.setTextSize(20);

            textView.setHeight(80);

            textView.setText(blackList.getPhoneNumber());

            return textView;
        }
    }

    //添加
    public void add_OnClick(View v)
    {
        //自定义对话框
        final EditText editText = new EditText(this);
        editText.setHint("输入电话号码");
        editText.setInputType(InputType.TYPE_CLASS_PHONE);

        //构建对话框
        new AlertDialog.Builder(this)
                .setTitle("添加黑名单")
                .setView(editText)
                .setCancelable(false)
                .setNegativeButton("取消", null)
                .setPositiveButton("确定", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {

                        //向数据库保存
                        //1.定义实体类
                        BlackList blackList = new BlackList(editText.getText().toString());

                        //2.通过DAO插入数据
                        long l = bld.insert(blackList);

                        if (l > 0)
                        {
                            Toast.makeText(MainActivity.this, "保存成功", Toast.LENGTH_SHORT).show();

                            //更新list
                            //alb = bld.getAll();
                            blackList.setId(l);
                            alb.add(0, blackList);

                            //刷新列表
                            bla.notifyDataSetChanged();
                        }


                        else
                        {
                            Toast.makeText(MainActivity.this, "保存失败", Toast.LENGTH_SHORT).show();
                        }
                    }
                })

                .show();
    }
}