Question

我想在每次单击按钮时发送消息但是使用此代码我只能第一次发送消息。我只能在清除App数据和缓存时再次发送消息。

public class MainActivity extends AppCompatActivity {
TextView tapme;
private static final int MY_PERMISSIONS_REQUEST_SEND_SMS = 0;

String phoneNo;
String message;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    tapme = (TextView) findViewById(R.id.tapme);
    tapme.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            sendSMS();
        }
    });


}

protected void sendSMS() {
    phoneNo = "+911333444400";
    message = "hi";

    if (ContextCompat.checkSelfPermission(this,
            Manifest.permission.SEND_SMS)
            != PackageManager.PERMISSION_GRANTED) {
        if (ActivityCompat.shouldShowRequestPermissionRationale(this,
                Manifest.permission.SEND_SMS)) {
        } else {
            ActivityCompat.requestPermissions(this,
                    new String[]{Manifest.permission.SEND_SMS},
                    MY_PERMISSIONS_REQUEST_SEND_SMS);
        }
    }
}

@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
    switch (requestCode) {
        case MY_PERMISSIONS_REQUEST_SEND_SMS: {
            if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                SmsManager smsManager = SmsManager.getDefault();
                smsManager.sendTextMessage(phoneNo, null, message, null, null);


                Toast.makeText(getApplicationContext(), "SMS sent.",
                        Toast.LENGTH_LONG).show();
            } else {
                Toast.makeText(getApplicationContext(),
                        "SMS faild, please try again.", Toast.LENGTH_LONG).show();
                return;
            }
        }
    }
}

我哪里做错了？非常感谢任何帮助。

Answer 1

   protected void sendSMS() {
        phoneNo = "1";
        message = "hi";

        if (ContextCompat.checkSelfPermission(this,
                Manifest.permission.SEND_SMS)
                != PackageManager.PERMISSION_GRANTED) {

            ActivityCompat.requestPermissions(this,
                    new String[]{Manifest.permission.SEND_SMS},
                    MY_PERMISSIONS_REQUEST_SEND_SMS);

        } else {
            SendTextMsg();
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
        switch (requestCode) {
            case MY_PERMISSIONS_REQUEST_SEND_SMS: {
                if (grantResults.length > 0
                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    SendTextMsg();
                } else {
                    Toast.makeText(getApplicationContext(),
                            "SMS faild, please try again.", Toast.LENGTH_LONG).show();
                }
            }
        }
    }

    private void SendTextMsg() {
        SmsManager smsManager = SmsManager.getDefault();
        smsManager.sendTextMessage(phoneNo, null, message, null, null);

        Toast.makeText(getApplicationContext(), "SMS sent.",
                Toast.LENGTH_LONG).show();
    }

Android Smsmanager不会多次发送消息

1 个答案: