如何解决短信权限错误Android studio？

Question

在这个项目中，我想发送一个位置的消息到目标号码.我已经添加了SEND_SMS在Manifest，我想这个应用程序发送消息，当我按下按钮。但有一个问题的代码。

这是logcat的错误

020-05-06 16:38:42.694 20708-20905/com.example.sos2 E/AndroidRuntime: FATAL EXCEPTION: AsyncTask #2
    Process: com.example.sos2, PID: 20708
    java.lang.RuntimeException: An error occurred while executing doInBackground()
        at android.os.AsyncTask$3.done(AsyncTask.java:353)
        at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:383)
        at java.util.concurrent.FutureTask.setException(FutureTask.java:252)
        at java.util.concurrent.FutureTask.run(FutureTask.java:271)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636)
        at java.lang.Thread.run(Thread.java:764)
     Caused by: java.lang.SecurityException: Sending SMS message: uid 10218 does not have android.permission.SEND_SMS.
        at android.os.Parcel.readException(Parcel.java:1960)
        at android.os.Parcel.readException(Parcel.java:1899)
        at com.android.internal.telephony.ISms$Stub$Proxy.sendTextForSubscriber(ISms.java:867)
        at android.telephony.SmsManager.sendTextMessageInternal(SmsManager.java:367)
        at android.telephony.SmsManager.sendTextMessage(SmsManager.java:350)
        at com.example.sos2.SendMessage1$SendMessageTask.doInBackground(SendMessage1.java:792)
        at com.example.sos2.SendMessage1$SendMessageTask.doInBackground(SendMessage1.java:727)
        at android.os.AsyncTask$2.call(AsyncTask.java:333)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162) 
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636) 
        at java.lang.Thread.run(Thread.java:764) 

这是我的java类

lass SendMessageTask extends AsyncTask<Void, Integer, Void> { //I have changed the input from View to Void
        View view;
        String address,city,state,country,postal_code,known_name;

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
        }

        @Override
        protected Void doInBackground(Void... view) {

            dTap = 0;
            for (int i = 1; i <= 40; i++) {
                try {
                    Thread.sleep(500);
                    presentTime=i*500;
                    if(i%2 == 0)
                    {
                        publishProgress(500*i/1000+10);
                    }
                 //   Log.d("hehe","thread is running");

                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                if (dTap == 1) {
                    dTap=0;
                   // Log.d("hehe","dtap is 1");
                    publishProgress(2);
                    return null;
                }
            }

            publishProgress(1);



          //  Log.d("hehe","starting recording");
//            Log.d("hehe","Send Message loc: "+finalAddress);
            startRecording();
            SharedPreferences sp = getSharedPreferences("Contacts", Context.MODE_PRIVATE);
            String s1 = sp.getString("1", "chooseContact1");
            String s2 = sp.getString("2", "chooseContact2");
            String s3 = sp.getString("3", "chooseContact3");
            String s4 = sp.getString("4", "chooseContact4");
            String s5 = sp.getString("5", "chooseContact5");
            SmsManager d = SmsManager.getDefault();

            SmsManager smsManager = SmsManager.getDefault();

            s1 = s1.replaceAll("\\s+","");
            s2 = s2.replaceAll("\\s+","");
            s3 = s3.replaceAll("\\s+","");
            s4 = s4.replaceAll("\\s+","");
            s5 = s5.replaceAll("\\s+","");

            if(finalAddress.equals("Hey.. I am in Danger. Please, help me ASAP!!")){
                publishProgress(500);
            }
//            Log.d("hehe",s1);
            if(!s1.equals("chooseContact1")) {
               // Toast.makeText(SendMessage1.this,"this is contact one "+ finalAddress,Toast.LENGTH_SHORT).show();
//                    Log.d("hehe",finalAddress+"this is sms 1");

                smsManager.sendTextMessage(s1,null,finalAddress,null,null);
//              Log.d("hehe","sending sms"+finalAddress);
            }
            if (!s2.equals("chooseContact2")) {
                smsManager.sendTextMessage(s2, null, finalAddress, null, null); //must be uncommented
            }
            if (!s3.equals("chooseContact3")) {
                smsManager.sendTextMessage(s3, null, finalAddress, null, null);
            }
            if (!s4.equals("chooseContact4")) {
                smsManager.sendTextMessage(s4, null, finalAddress, null, null);
            }
            if (!s5.equals("chooseContact5")) {
                smsManager.sendTextMessage(s5, null, finalAddress, null, null);
            }

            //Geocoder geoCoder ;

            //  Toast.makeText(this,ans +"this is the address",Toast.LENGTH_SHORT).show();


            return null;
        }

我应该对Fixx这段代码做什么修改或添加什么内容？

Answer 1

从API 23开始，你必须在运行时检查权限。用户可以随时撤销你的应用程序的权限，所以你必须在执行异步任务之前，确保你仍然可以发送短信。

试着在你的异步任务前添加类似这样的东西。

if (ContextCompat.checkSelfPermission(thisActivity, Manifest.permission.SEND_SMS)
        != PackageManager.PERMISSION_GRANTED) {
    // Permission is not granted
    // You have to ask for permission again
} else {
    // Granted, you can start you async task here
}

Docs:https:/developer.android.comtrainingpermissionsrequesting.html。