java - 不兼容的类型 Android 允许权限？

Question

我在 onCreate 方法中运行此代码以尝试获得许可，但由于某种原因它给了我错误:

Incompatible types required int found boolean for this part: if (ContextCompat.checkSelfPermission(MainActivity.this, android.Manifest.permission.READ_SMS) + ContextCompat.checkSelfPermission(MainActivity.this, android.Manifest.permission.SEND_SMS))

 @Override
    protected void onCreate(Bundle savedInstanceState) {


            if (ContextCompat.checkSelfPermission(MainActivity.this, android.Manifest.permission.READ_SMS) +
                    ContextCompat.checkSelfPermission(MainActivity.this, android.Manifest.permission.SEND_SMS))
        != PackageManager.PERMISSION_GRANTED) {
            if (AppCompatActivity.shouldShowRequestPermissionRationale(this,"Manifest.permission.READ_SMS") ||
                    AppCompatActivity.shouldShowRequestPermissionRationale(this,"Manifest.permission.READ_SMS")) {

                // Show an explanation to the user *asynchronously* -- don't block
                // this thread waiting for the user's response! After the user
                // sees the explanation, try again to request the permission.

            } else {

                // No explanation needed; request the permission
                ActivityCompat.requestPermissions(this,
                        new String[]{"Manifest.permission.READ_SMS, Manifest.permission.SEND_SMS"},
                        REQUEST_CODE);

                // REQUEST_CODE is an
                // app-defined int constant. The callback method gets the
                // result of the request.
            }
        }

else {
            // Permission has already been granted
        }

Answer 1

在“if”条件的开头缺少一个开放的圆括号:

if (ContextCompat.checkSelfPermission(MainActivity.this, android.Manifest.permission.READ_SMS) + ContextCompat.checkSelfPermission(MainActivity.this, android.Manifest.permission.SEND_SMS)) != PackageManager.PERMISSION_GRANTED){......}

您有 3 个左括号和 4 个右括号。

这是你应该拥有的:

if ((ContextCompat.checkSelfPermission(MainActivity.this, android.Manifest.permission.READ_SMS) + ContextCompat.checkSelfPermission(MainActivity.this, android.Manifest.permission.SEND_SMS)) != PackageManager.PERMISSION_GRANTED){.....}