后台发短信功能闪退!

package com.yangge.love;

import android.app.Activity;
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Bundle;
import android.telephony.SmsManager;
import android.view.View;
import android.view.View.OnClickListener;

public class MainActivity extends Activity {

    PendingIntent paIntent;
    SmsManager smsManager;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        paIntent = PendingIntent.getBroadcast(this, 0, new Intent(), 0);
        smsManager = SmsManager.getDefault();
        findViewById(R.id.login).setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {

                smsManager.sendTextMessage("13612345678", null, "这条短信是自动发送的", paIntent,
                        null);
            }
        });
    }
/*

## --------- beginning of crash
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.yangge.love, PID: 2517
java.lang.SecurityException: Sending SMS message: uid 10059 does not have android.permission.SEND_SMS.
at android.os.Parcel.readException(Parcel.java:1599)
at android.os.Parcel.readException(Parcel.java:1552)
at com.android.internal.telephony.ISms$Stub$Proxy.sendTextForSubscriber(ISms.java:768)
at android.telephony.SmsManager.sendTextMessageInternal(SmsManager.java:310)
at android.telephony.SmsManager.sendTextMessage(SmsManager.java:293)
at com.yangge.love.MainActivity$1.onClick(MainActivity.java:27)
at android.view.View.performClick(View.java:5198)
at android.view.View$PerformClick.run(View.java:21147)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Application terminated.

错误提示说 uid 10059 does not have android.permission.SEND_SMS. 没有权限