Androis 短信權限

Question

每次用戶按下按鈕時，我都想檢查短信發送權限。 如果授予權限，則應用程序應發送短信，但如果權限被拒絕，我想再次顯示權限對話框，以便用戶授予權限。 我的問題如下：如果用戶被拒絕權限，我的應用程序不會再次顯示對話框。 我使用以下代碼。 有什么幫助嗎？

package com.example.lockdownsms.ui.home

import android.Manifest
import android.content.pm.PackageManager
import android.os.Build
import android.os.Bundle
import android.telephony.SmsManager
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.Button
import androidx.core.app.ActivityCompat
import androidx.fragment.app.Fragment
import androidx.lifecycle.ViewModelProvider
import com.example.lockdownsms.R


class HomeFragment : Fragment() {

    private lateinit var homeViewModel: HomeViewModel

    override fun onCreateView(
        inflater: LayoutInflater,
        container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        homeViewModel =
                ViewModelProvider(this).get(HomeViewModel::class.java)
        val root = inflater.inflate(R.layout.fragment_home, container, false)
       /* val textView: TextView = root.findViewById(R.id.text_home)
        homeViewModel.text.observe(viewLifecycleOwner, Observer {
            textView.text = it
        })*/

        val sms1 = root.findViewById<Button>(R.id.button1)
        sms1.setOnClickListener {

            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                if (getContext()?.let { it1 -> ActivityCompat.checkSelfPermission(it1, Manifest.permission.SEND_SMS)} != PackageManager.PERMISSION_GRANTED) {
                    requestPermissions(Array<String>(1) { android.Manifest.permission.SEND_SMS }, 100);
                } else {
                    val smsManager: SmsManager = SmsManager.getDefault()
                    smsManager.sendTextMessage("13033", null, "msg", null, null)
                }

            }else {
                val smsManager: SmsManager = SmsManager.getDefault()
                smsManager.sendTextMessage("13033", null, "msg", null, null)
            }
        }
        return root
    }

    override fun onRequestPermissionsResult(
        requestCode: Int,
        permissions: Array<out String>,
        grantResults: IntArray
    ) {
        //super.onRequestPermissionsResult(requestCode, permissions, grantResults)
        if (requestCode == 100) {
            if (permissions[0].equals(Manifest.permission.SEND_SMS) && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                val smsManager: SmsManager = SmsManager.getDefault()
                smsManager.sendTextMessage("13033", null, "msg", null, null)
            }

        }
    }


}

Answer 1

這就是您在 Activity 中需要做的所有事情。

請注意，如果您想在Fragment中使用此代碼段，請執行以下操作。

• checkSelfPermission()更改為ActivityCompact.checkSelfPermission()

並將ActivityCompat.requestPermissions()更改為requestPermissions()

Permission 結果（Allow 或 Deny）的處理與 Activity 相同。

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

 public static final int MY_PERMISSIONS_SEND_SMS = 1;

 @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btnCheckSMSPermission.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        int id = v.getId();
        switch (id) {
            case R.id.btnCheckSMSPermission:
                checkSMSPermission();
                break;
                   }
}


 void checkSMSPermission() {
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.SEND_SMS) != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.SEND_SMS}, MY_PERMISSIONS_SEND_SMS);
        }

    }



  @Override
    public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
        switch (requestCode) {
            case MY_PERMISSIONS_SEND_SMS: {
                // If request is cancelled, the result arrays are empty.
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    // permission was granted, yay! Do the
                    
                    Toast.makeText(getApplicationContext(), "SEND_SMS granted", Toast.LENGTH_SHORT).show();
                } else {
                    // permission denied, boo! Disable the
                    // functionality that depends on this permission.
                    Toast.makeText(getApplicationContext(), "SEND_SMS denied", Toast.LENGTH_SHORT).show();
                }
                return;

            }

      }


    }