I'm trying to write an app that sends SMS. When checking if I have the required permissions it returns true but still crashes with SecurityException.
When button is pressed
private void startAutoMsg() {
    Log.d("Starting Auto Msg");
    //FIXME: Start proper loop
    if (canSendSms()) {
        sendMessage();
        mAutoMsgButton.setBackgroundColor(Color.GREEN);
    }
}
I'm using the below function to determine if I have the proper permission
private boolean canSendSms() {
    if ((ContextCompat.checkSelfPermission(mContext, Manifest.permission.SEND_SMS)
            == PackageManager.PERMISSION_GRANTED)) {
        Log.d("Permission granted");
        return true;
    } else {
        Log.d("Permission denied");
        ActivityCompat.requestPermissions(
                mActivity, new String[]{Manifest.permission.SEND_SMS}, 101);
        return false;
    }
}
The above code returns true and therefore SMS is trying to be sent with this
private void sendMessage() {
    Log.d("sending message");
    PendingIntent sentPI = PendingIntent.getBroadcast(
            mContext, 0, new Intent(Constants.ACTION_SMS_SENT), 0);
    PendingIntent deliveredPI = PendingIntent.getBroadcast(
            mContext, 0, new Intent(Constants.ACTION_SMS_DELIVERED), 0);
    Thread thread = new Thread(new Runnable() {
        @Override
        public void run() {
            mSmsManager.sendTextMessage("mNumber", null, mText, sentPI, deliveredPI);
        }
    });
    thread.run();
}
In my manifest:
<uses-permission android:name="android.permission.SEND_SMS"/>
<uses-permission android:name="android.permission.READ_SMS" />
<uses-permission android:name="android.permission.WRITE_SMS" />
<uses-permission android:name="android.permission.RECEIVE_SMS" />
<uses-permission android:name="android.permission.RECEIVE_MMS" />
Log from crash
D/SmsApp: TelephonyFragment: canSendSms(533): Permission granted
D/SmsApp: TelephonyFragment: sendMessage(222): sending message
D/AndroidRuntime: Shutting down VM
E/AndroidRuntime: FATAL EXCEPTION: main
                  Process: com.android.phone, PID: 16736
                  java.lang.SecurityException: Sending SMS message: uid 1001 does not have android.permission.SEND_SMS.
                      at android.app.ContextImpl.enforce(ContextImpl.java:1727)
                      at android.app.ContextImpl.enforceCallingPermission(ContextImpl.java:1749)
                      at android.content.ContextWrapper.enforceCallingPermission(ContextWrapper.java:750)
                      at android.content.ContextWrapper.enforceCallingPermission(ContextWrapper.java:750)
                      at com.android.internal.telephony.IccSmsInterfaceManager.sendText(IccSmsInterfaceManager.java:410)
                      at com.android.internal.telephony.UiccSmsController.sendTextForSubscriber(UiccSmsController.java:136)
                      at android.telephony.SmsManager.sendTextMessageInternal(SmsManager.java:366)
                      at android.telephony.SmsManager.sendTextMessage(SmsManager.java:349)
                      at com.rawinc.smsapp.ui.telephony.TelephonyFragment$2.run(TelephonyFragment.java:230)
                      at java.lang.Thread.run(Thread.java:764)
                      at com.rawinc.smsapp.ui.telephony.TelephonyFragment.sendMessage(TelephonyFragment.java:233)
                      at com.rawinc.smsapp.ui.telephony.TelephonyFragment.startAutoMsg(TelephonyFragment.java:517)
                      at com.rawinc.smsapp.ui.telephony.TelephonyFragment.toggleAutoMsg(TelephonyFragment.java:507)
                      at com.rawinc.smsapp.ui.telephony.TelephonyFragment.lambda$-com_rawinc_smsapp_ui_telephony_TelephonyFragment_11555(TelephonyFragment.java:359)
                      at com.rawinc.smsapp.ui.telephony.-$Lambda$uKVldJdEkN_fZa3QWm3EZHDa2r8$2.$m$0(Unknown Source:4)
                      at com.rawinc.smsapp.ui.telephony.-$Lambda$uKVldJdEkN_fZa3QWm3EZHDa2r8$2.onClick(Unknown Source:0)
                      at android.view.View.performClick(View.java:6178)
                      at android.view.View$PerformClick.run(View.java:24416)
                      at android.os.Handler.handleCallback(Handler.java:769)
                      at android.os.Handler.dispatchMessage(Handler.java:98)
                      at android.os.Looper.loop(Looper.java:255)
                      at android.app.ActivityThread.main(ActivityThread.java:6555)
                      at java.lang.reflect.Method.invoke(Native Method)
                      at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
checkSelfPermission(activity, Manifest. permission. X) checks if any permission is already granted, if you check out other answers they do the same, and rest of the code asks for the permissions not granted.
Android provides a utility method, shouldShowRequestPermissionRationale() , that returns true if the user has previously denied the request, and returns false if a user has denied a permission and selected the Don't ask again option in the permission request dialog, or if a device policy prohibits the permission.
Please Do This :
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
public abstract class RuntimePermissionsActivity extends AppCompatActivity
{
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
    }
    @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults)
    {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        int permissionCheck = PackageManager.PERMISSION_GRANTED;
        for (int permission : grantResults)
        {
            permissionCheck = permissionCheck + permission;
        }
        if ((grantResults.length > 0) && permissionCheck == PackageManager.PERMISSION_GRANTED)
        {
            onPermissionsGranted(requestCode);
        }
        else
        {
            onPermissionsDeny(requestCode);
        }
    }
    public void requestAppPermissions(final String[] requestedPermissions, final int requestCode)
    {
        int permissionCheck = PackageManager.PERMISSION_GRANTED;
        boolean shouldShowRequestPermissionRationale = false;
        for (String permission : requestedPermissions)
        {
            permissionCheck = permissionCheck + ContextCompat.checkSelfPermission(this, permission);
            shouldShowRequestPermissionRationale = shouldShowRequestPermissionRationale || ActivityCompat.shouldShowRequestPermissionRationale(this, permission);
        }
        if (permissionCheck != PackageManager.PERMISSION_GRANTED)
        {
            ActivityCompat.requestPermissions(this, requestedPermissions, requestCode);
        }
        else
        {
            onPermissionsGranted(requestCode);
        }
    }
    public abstract void onPermissionsGranted(int requestCode);
    public abstract void onPermissionsDeny(int requestCode);
}
Next in your MainActivity (or any Activity) You Shoulde extends From This Class like This :
public class Main_Activity extends RuntimePermissionsActivity
And Overrite This Method in your Activity :
@Override
public void onPermissionsGranted(int requestCode) {
}
@Override
public void onPermissionsDeny(int requestCode) {
}
In Final : Use this Code To Check Permmision :
MainActivity.super.requestAppPermissions(new String[]{android.Manifest.permission.WRITE_EXTERNAL_STORAGE}, requestcodeWriteStorage);
Also you can Check many Permission and you shoulde define in String Array ;
requestcodeWriteStorage is a int you should define it ;
Manage your Callback with 2 method that i read .
for example :
@Override
public void onPermissionsGranted(int requestCode) {
    if (requestCode == requestcodeWriteStorage){
        Toast.makeText(this,"Done",Toast.LENGTH_LONG).show();
    }
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