Android实现获取联系人电话号码功能

............//构造一个隐式的Intent，拉起联系人界面final Intent pickIntent = new Intent(Intent.ACTION_PICK,  ContactsContract.Contacts.CONTENT_URI);mSuspectButton = (Button)v.findViewById(R.id.crime_suspect);mSuspectButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) {  startActivityForResult(pickIntent, REQUEST_CONTACT); }});...........

@Overridepublic void onActivityResult(int requestCode, int resultCode, Intent data) { ........... } else if (requestCode == REQUEST_CONTACT && data != null) {  //在联系人界面选择完毕后，返回的结果中携带了对应的Uri  Uri contactUri = data.getData();  String[] queryFields = new String[] {    ContactsContract.Contacts.DISPLAY_NAME,    //查询联系人对应的contactId    ContactsContract.Contacts._ID  };  Cursor c = getActivity().getContentResolver()    .query(contactUri, queryFields, null, null, null);  if (c == null) {   return;  }  try {   if (c.getCount() == 0) {    return;   }   c.moveToFirst();   //联系人的名称   String suspect = c.getString(0);   mCrime.setSuspect(suspect);   mSuspectButton.setText(suspect);   //记录联系人的contactId   mCrime.setContactId(c.getString(1));   mDialButton.setEnabled(true);  } finally {   c.close();  } }}

...............mDialButton = (Button) v.findViewById(R.id.crime_dial);mDialButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) {  //SDK >= 23时，定义了Activity.checkSelfPermission方法  //为了避免对SDK版本的判断，兼容低版本，一般都是使用兼容库中的方法  //此处使用的是android.support.v4.app.Fragment中的checkSelfPermission  //对于Activity，可以使用ActivityCompat中的方法  int hasReadContactsPermission = checkSelfPermission(getContext(),    android.Manifest.permission.READ_CONTACTS);  //判断是否已有对应权限  //用户主动赋予过一次后，该应用就一直具有该权限，除非在应用管理中撤销  if (hasReadContactsPermission != PackageManager.PERMISSION_GRANTED) {   //没有权限，则需要申请权限   //当用户选择“拒绝权限申请，并不再提示”后，仍可能点击该按键   //因此需要弹出提示框，提醒用户该功能需要权限   //这就要用到shouldShowRequestPermissionRationale方法   if (!shouldShowRequestPermissionRationale(android.Manifest.permission.READ_CONTACTS)) {    showMessageOKCancel("You need to allow access to Contacts",     new DialogInterface.OnClickListener() {      @Override      public void onClick(DialogInterface dialog, int which) {       //仍调用兼容库中的方法，申请权限       requestPermissions(        new String[] {Manifest.permission.READ_CONTACTS},        ASK_READ_CONTACTS_PERMISSION);       }      });    return;   }   requestPermissions(new String[] {Manifest.permission.READ_CONTACTS},     ASK_READ_CONTACTS_PERMISSION);   return;  }  //有权限则直接获取电话号码，并拨号  getPhoneNumberAndDial(); }});................private void showMessageOKCancel(String message, DialogInterface.OnClickListener okListener) { new AlertDialog.Builder(getContext())  .setMessage(message)  .setPositiveButton("OK", okListener)  .setNegativeButton("Cancel", null)  .create()  .show();}

@Overridepublic void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { switch (requestCode) {  case ASK_READ_CONTACTS_PERMISSION:   //由于只申请了一个权限，因此grantResults[0]就是对应权限的申请结果   if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {     //权限申请成功，则可以获取电话号码并拨号     getPhoneNumberAndDial();   } else {    Toast.makeText(getContext(),      "READ_CONTACTS Denied",      Toast.LENGTH_SHORT)      .show();   }   return;  default:   super.onRequestPermissionsResult(requestCode, permissions, grantResults); }}

private void getPhoneNumberAndDial() { //根据之前获取到的contactId，得到CommonDataKinds.Phone表中的信息 Cursor c = getActivity().getContentResolver().query(   ContactsContract.CommonDataKinds.Phone.CONTENT_URI,   null,   ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = ?",   new String[] {mCrime.getContactId()},   null); if (c == null) {  return; } try {  if (c.getCount() != 0) {   c.moveToFirst();   //得到Phone Number对应的indexId   int index = c.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);   //得到phone Number   String number = c.getString(index);   Uri realNumber = Uri.parse("tel: " + number);   //ACTION_DIAL拉起拨号盘拨号，或利用ACTION_CALL直接拨号   Intent i = new Intent(Intent.ACTION_DIAL);   i.setData(realNumber);   startActivity(i);  } else {   Toast.makeText(getContext(), "choose contact again", Toast.LENGTH_LONG).show();  } } finally {  c.close(); }}