Android笔记： 获取手机联系人列表

    public class PhoneDto {
        private String name;        //联系人姓名
        private String telPhone;    //电话号码
        public String getName() {
            return name;
        }
        public void setName(String name) {
            this.name = name;
        }
        public String getTelPhone() {
            return telPhone;
        }
        public void setTelPhone(String telPhone) {
            this.telPhone = telPhone;
        }
        public PhoneDto() {
        }
        public PhoneDto(String name, String telPhone) {
            this.name = name;
            this.telPhone = telPhone;
        }
    }

    public class PhoneUtil {
        // 号码
        public final static String NUM = ContactsContract.CommonDataKinds.Phone.NUMBER;
        // 联系人姓名
        public final static String NAME = ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME;
        //上下文对象
        private Context context;
        //联系人提供者的uri
        private Uri phoneUri = ContactsContract.CommonDataKinds.Phone.CONTENT_URI;
        public PhoneUtil(Context context){
            this.context = context;
        }
        //获取所有联系人
        public List<PhoneDto> getPhone(){
            List<PhoneDto> phoneDtos = new ArrayList<>();
            ContentResolver cr = context.getContentResolver();
            Cursor cursor = cr.query(phoneUri,new String[]{NUM,NAME},null,null,null);
            while (cursor.moveToNext()){
                PhoneDto phoneDto = new PhoneDto(cursor.getString(cursor.getColumnIndex(NAME)),cursor.getString(cursor.getColumnIndex(NUM)));
                phoneDtos.add(phoneDto);
            }
            return phoneDtos;
        }
    }

    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context="com.test.content.MainActivity">
        <ListView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/lv_main_list"></ListView>
    </LinearLayout>

    public class MainActivity extends AppCompatActivity {
        private List<PhoneDto> phoneDtos;
        private ListView lv_main_list;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            check();
        }
        /**
         * 检查权限
         */
        private void check() {
            //判断是否有权限
            if(ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_CONTACTS)
                    != PackageManager.PERMISSION_GRANTED){
                ActivityCompat.requestPermissions(MainActivity.this,new String[]{Manifest.permission.READ_CONTACTS},201);
            }else{
                initViews();
            }
        }
        @Override
        public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
            super.onRequestPermissionsResult(requestCode, permissions, grantResults);
            if(requestCode==201){
                initViews();
            }else{
                return;
            }
        }
        private void initViews() {
            PhoneUtil phoneUtil = new PhoneUtil(this);
            phoneDtos = phoneUtil.getPhone();
            lv_main_list = (ListView) findViewById(R.id.lv_main_list);
            MyAdapter myAdapter = new MyAdapter();
            lv_main_list.setAdapter(myAdapter);
            //给listview增加点击事件
            /*lv_main_list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                @Override
                public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                    //拨打电话
                    Intent intent = new Intent();
                    intent.setAction("android.intent.action.CALL");
                    intent.addCategory(Intent.CATEGORY_DEFAULT);
                    intent.setData(Uri.parse("tel:"+phoneDtos.get(position).getTelPhone()));
                    startActivity(intent);
                }
            });*/
        }
        //自定义适配器
        private class MyAdapter extends BaseAdapter {
            @Override
            public int getCount() {
                return phoneDtos.size();
            }
            @Override
            public Object getItem(int position) {
                return phoneDtos.get(position);
            }
            @Override
            public long getItemId(int position) {
                return position;
            }
            @SuppressLint("NewApi")
            @Override
            public View getView(int position, View convertView, ViewGroup parent) {
                PhoneDto phoneDto = phoneDtos.get(position);
                LinearLayout linearLayout = new LinearLayout(MainActivity.this);
                LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(0,LinearLayout.LayoutParams.WRAP_CONTENT);
                layoutParams.weight = 1;
                TextView tv_name = new TextView(MainActivity.this);
                tv_name.setId(View.generateViewId());
                tv_name.setLayoutParams(layoutParams);
                tv_name.setText(phoneDto.getName());
                TextView tv_num = new TextView(MainActivity.this);
                tv_num.setId(View.generateViewId());
                tv_num.setLayoutParams(layoutParams);
                tv_num.setText(phoneDto.getTelPhone());
                linearLayout.addView(tv_name);
                linearLayout.addView(tv_num);
                return linearLayout;
            }
        }
    }