读取系统联系人

系统联系人提供了一个内容提供者,通过内容解析器,匹配Url地址
1,内容解析器
2,Url地址,查看系统联系人数据库,内容提供者源码
先看清单文件
后看java类(联系人数据库有多张表)

contents://com.android.contacts/表名

3,系统联系人数据库中核心表,表结构
raw_contacts 联系人表: contact_id 联系人唯一性id值

data 用户信息表:raw_contact_id作为外键,和raw_contacts中contact_id做关联查询
获取data1字段,包含了电话号码以及联系人名称
mimetype_id字段,包含了当前行data1对应的数据类型

mimetypes 类型表: 获取data表中mimetype_id和mimetypes中_id做关联查询,获取指向的信息类型

电话号码:vnd.android.cursor.item/phone_v2
用户名称:vnd.android.cursor.item/name

google,data表和mimetypes生成了一个视图
4,表的访问方式
content://com.android.contacts/raw_contacts
content://com.android.contacts/data

public class ContactListActivity extends Activity {
    protected static final String tag = "ContactListActivity";
    private ListView lv_contact;
    private List<HashMap<String,String>> contactList = new ArrayList<HashMap<String,String>>();
    private MyAdapter mAdapter;
    
    private Handler mHandler = new Handler(){
        public void handleMessage(android.os.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 position) {
            return contactList.get(position);
        }

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

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

    /**
     * 获取系统联系人数据方法
     */
    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);
//                    Log.i(tag, "id = "+id);
                    //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 OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view,int position, long id) {
                //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(position);
                    //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();
                }
            }
        });
    }
}

 

public class Setup3Activity extends Activity {
    private EditText et_phone_number;
    private Button bt_select_number;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_setup3);
        
        initUI();
    }
    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 phone = SpUtil.getString(this, ConstantValue.CONTACT_PHONE, "");
        et_phone_number.setText(phone);
        
        //点击选择联系人的对话框
        bt_select_number = (Button) findViewById(R.id.bt_select_number);
        bt_select_number.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(getApplicationContext(), ContactListActivity.class);
                startActivityForResult(intent, 0);
            }
        });
    }
    @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);
    }
    
    public void nextPage(View view){
        //点击按钮以后,需要获取输入框中的联系人,再做下一页操作
        String phone = et_phone_number.getText().toString();
        
        //在sp存储了相关联系人以后才可以跳转到下一个界面
//        String contact_phone = SpUtil.getString(getApplicationContext(), ConstantValue.CONTACT_PHONE, "");
        if(!TextUtils.isEmpty(phone)){
            Intent intent = new Intent(getApplicationContext(), Setup4Activity.class);
            startActivity(intent);
            
            finish();
            
            //如果现在是输入电话号码,则需要去保存
            SpUtil.putString(getApplicationContext(), ConstantValue.CONTACT_PHONE, phone);
            
            overridePendingTransition(R.anim.next_in_anim, R.anim.next_out_anim);
        }else{
            ToastUtil.show(this,"请输入电话号码");
        }
    }
    
    public void prePage(View view){
        Intent intent = new Intent(getApplicationContext(), Setup2Activity.class);
        startActivity(intent);
        
        finish();
        
        overridePendingTransition(R.anim.pre_in_anim, R.anim.pre_out_anim);
    }
}