if (ContextCompat.checkSelfPermission(RegisterActivity.this, Manifest.permission.READ_PHONE_STATE) == PackageManager.PERMISSION_DENIED){
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.READ_PHONE_STATE}, REQUEST_READ_PHONE_STATE_PERMISSION);
if (ContextCompat.checkSelfPermission(RegisterA
阅读背景：
ActivityCompat.requestPermissions未显示对话框
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