java - 每次发短信都是 'show permission dialog '怎么解决？

Question

我想通过android-app发送短信，但是每次发送消息之前都会显示权限对话框，我应该在第一次请求权限后发送一条不显示对话框的消息。

我的 Android 应用程序在 mi-8 上运行，目标 SDK 版本是 29。

if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.SEND_SMS) != PackageManager.PERMISSION_GRANTED) {
    ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.SEND_SMS}, 3);
} else if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ_PHONE_STATE) != PackageManager.PERMISSION_GRANTED) {
    ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.READ_PHONE_STATE}, 4);
} else {
    sendMsg();
}

我希望在第一次请求权限后发送消息时不会显示权限对话框，但实际上每次发送消息时都会显示对话框。

Answer 1

使用此函数检查您是否已授予权限，如果您已授予所需的权限，它将返回 true 标志

通过这种方式检查

   private boolean checkAndRequestPermissions(){

        //add as much as permission you need
        int readSMS = ContextCompat.checkSelfPermission(this, Manifest.permission.READ_SMS);
        int sendSms = ContextCompat.checkSelfPermission(this, Manifest.permission.SEND_SMS);

        List<String> listPermissionsNeeded = new ArrayList<>();

        if (readSMS != PackageManager.PERMISSION_GRANTED) {
            listPermissionsNeeded.add(Manifest.permission.READ_SMS);
        }
        if (receiveSms != PackageManager.PERMISSION_GRANTED) {
            listPermissionsNeeded.add(Manifest.permission.RECEIVE_SMS);
        }
        if (!listPermissionsNeeded.isEmpty()) {
            ActivityCompat.requestPermissions(this, listPermissionsNeeded.toArray(new String[listPermissionsNeeded.size()]),
                    REQUEST_ID_MULTIPLE_PERMISSIONS);
            return false;
        }
        return true;
    }

通过这种方式检查

 if (checkAndRequestPermissions()){
        sendMsg();
    }else{
      //do what you want  
    }

无需通过硬编码方式执行此操作