Android 手机卫士--获取联系人信息并显示与回显

    private ListView lv_contact;
    private List<HashMap<String, String>> contactList = new ArrayList<HashMap<String, String>>();
    private MyAdapter mAdapter;

    private Handler mHandler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            //8,填充数据适配器
            mAdapter = new MyAdapter();
            lv_contact.setAdapter(mAdapter);
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_contact_list);
        initUI();
        initData();
    }

    class MyAdapter extends BaseAdapter{

        @Override
        public int getCount() {
            return contactList.size();
        }

        @Override
        public HashMap<String, String> getItem(int i) {
            return contactList.get(i);
        }

        @Override
        public long getItemId(int i) {
            return i;
        }

        @Override
        public View getView(int i, View view, ViewGroup viewGroup) {
            View v = View.inflate(getApplicationContext(), R.layout.listview_contact_item, null);
            TextView tv_name = (TextView)v.findViewById(R.id.tv_name);
            TextView tv_phone = (TextView)v.findViewById(R.id.tv_phone);
            tv_name.setText(getItem(i).get("name"));
            tv_phone.setText(getItem(i).get("phone"));
            return v;
        }
    }

    /**
     *  获取联系人数据的方法
     */
    private void initData() {
        //因为读取系统联系人,可能是一个耗时操作,放置到子线程中处理
        new Thread(){
            public void run(){
                //1,获取内容解析器对象
                ContentResolver contentResolver = getContentResolver();
                //2,做查询系统联系人数据库表过程(读取联系人权限)
                Cursor cursor = contentResolver.query(
                        Uri.parse("content://com.android.contacts/raw_contacts"),
                        new String[]{"contact_id"},
                        null, null, null);
                contactList.clear();
                //3,循环游标,直到没有数据为止
                while (cursor.moveToNext()){
                    String id = cursor.getString(0);
                    //4,根据用户唯一性id值,查询data表和mimetype表生成的视图,获取data以及mimetype字段
                    Cursor indexCursor = contentResolver.query(
                            Uri.parse("content://com.android.contacts/data"),
                            new String[]{"data1","mimetype"},
                            "raw_contact_id = ?", new String[]{id}, null);
                    //5,循环获取每一个联系人的电话号码以及姓名,数据类型
                    HashMap<String, String> hashMap = new HashMap<String, String>();
                    while (indexCursor.moveToNext()){
                        String data = indexCursor.getString(0);
                        String type = indexCursor.getString(1);

                        //6,区分类型去给hashMap填充数据
                        if(type.equals("vnd.android.cursor.item/phone_v2")) {
                            //数据非空判断
                            if(!TextUtils.isEmpty(data)) {
                                hashMap.put("phone", data);
                            }
                        }else if(type.equals("vnd.android.cursor.item/name")) {
                            if(!TextUtils.isEmpty(data)) {
                                hashMap.put("name", data);
                            }
                        }
                    }
                    indexCursor.close();
                    contactList.add(hashMap);

                }
                cursor.close();
                //7,消息机制,发送一个空的消息,告知主线程可以去使用子线程已经填充好的数据集合
                mHandler.sendEmptyMessage(0);
            }

        }.start();
    }

    private void initUI() {
        lv_contact = (ListView) findViewById(R.id.lv_contact);
        lv_contact.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                //1,获取点中条目的索引指向集合中的对象
                if(mAdapter != null) {
                    HashMap<String, String> hashMap = mAdapter.getItem(i);
                    //2,获取当前条目指向集合对应的电话号码
                    String phone =  hashMap.get("phone");
                    //3,此电话号码需要给第三个导航界面使用

                    //4,在结束此界面回到前一个导航界面的时候,需要将数据返回过去
                    Intent intent = new Intent();
                    intent.putExtra("phone", phone);
                    setResult(0, intent);
                    finish();

                }
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if(data != null) {
            //1,返回到当前界面的时候,接受结果的方法
            String phone = data.getStringExtra("phone");
            //2,将特殊字符过滤(中划线转换成空字符串)
            phone = phone.replace("-", "").replace(" ", "").trim();
            et_phone_number.setText(phone);

            //3,存储联系人至sp中
            SpUtil.putString(getApplicationContext(), ConstantValue.CONTACT_PHONE, phone);
        }
        super.onActivityResult(requestCode, resultCode, data);
    }

    private void initUI() {
        //显示电话号码的输入框
        et_phone_number = (EditText)findViewById(R.id.et_phone_number);
        //获取联系人电话号码回显过程
        String contact_phone = SpUtil.getString(this, ConstantValue.CONTACT_PHONE, "");
        et_phone_number.setText(contact_phone);
        bt_select_number = (Button) findViewById(R.id.bt_select_number);
       //点击选择联系人的对话框
        bt_select_number.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(getApplicationContext(), ContactListActivity.class);
                startActivityForResult(intent, 0);
            }
        });
    }