android 调用拨打电话，程序崩溃

FATAL EXCEPTION: main
03-27 17:43:08.012: E/AndroidRuntime(18523): Process: com.mtq.freighthelper, PID: 18523
03-27 17:43:08.012: E/AndroidRuntime(18523): java.lang.SecurityException: Permission Denial: starting Intent { act=android.intent.action.CALL dat=tel:xxxx-xxxxxxxx cmp=com.android.server.telecom/.components.UserCallActivity } from ProcessRecord{1f529f5 18523:com.mtq.freighthelper/u0a491} (pid=18523, uid=10491) with revoked permission android.permission.CALL_PHONE
03-27 17:43:08.012: E/AndroidRuntime(18523):     at android.os.Parcel.readException(Parcel.java:1620)
03-27 17:43:08.012: E/AndroidRuntime(18523):     at android.os.Parcel.readException(Parcel.java:1573)
03-27 17:43:08.012: E/AndroidRuntime(18523):     at android.app.ActivityManagerProxy.startActivity(ActivityManagerNative.java:2681)
03-27 17:43:08.012: E/AndroidRuntime(18523):     at android.app.Instrumentation.execStartActivity(Instrumentation.java:1509)
03-27 17:43:08.012: E/AndroidRuntime(18523):     at android.app.Activity.startActivityForResult(Activity.java:3978)
03-27 17:43:08.012: E/AndroidRuntime(18523):     at android.app.Activity.startActivityForResult(Activity.java:3939)
03-27 17:43:08.012: E/AndroidRuntime(18523):     at android.app.Activity.startActivity(Activity.java:4262)
03-27 17:43:08.012: E/AndroidRuntime(18523):     at android.app.Activity.startActivity(Activity.java:4230)
03-27 17:43:08.012: E/AndroidRuntime(18523):     at com.mtq.freighthelper.ui.activity.contacts.ContactsDetailActivity.onClick(ContactsDetailActivity.java:97)
03-27 17:43:08.012: E/AndroidRuntime(18523):     at android.view.View.performClick(View.java:5207)
03-27 17:43:08.012: E/AndroidRuntime(18523):     at android.view.View$PerformClick.run(View.java:21177)
03-27 17:43:08.012: E/AndroidRuntime(18523):     at android.os.Handler.handleCallback(Handler.java:739)
03-27 17:43:08.012: E/AndroidRuntime(18523):     at android.os.Handler.dispatchMessage(Handler.java:95)
03-27 17:43:08.012: E/AndroidRuntime(18523):     at android.os.Looper.loop(Looper.java:148)
03-27 17:43:08.012: E/AndroidRuntime(18523):     at android.app.ActivityThread.main(ActivityThread.java:5438)
03-27 17:43:08.012: E/AndroidRuntime(18523):     at java.lang.reflect.Method.invoke(Native Method)
03-27 17:43:08.012: E/AndroidRuntime(18523):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:739)
03-27 17:43:08.012: E/AndroidRuntime(18523):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:629)

使用设备：小米4

android: 6.0

程序报java.lang.SecurityException: Permission Denial: starting Intent { act=android.intent.action.CALL dat=tel:xxxx-xxxxxxxx cmp=com.android.server.telecom/.components.UserCallActivity } from ProcessRecord{1f529f5 18523:com.mtq.freighthelper/u0a491} (pid=18523, uid=10491) with revoked permission

原因：

在6.0 系统中请求某些权限需要检查权限

if (!TextUtils.isEmpty(phone)) {
                if (!hasPermission()) {
                    // 在6.0 系统中请求某些权限需要检查权限
                    int curApiVersion = Build.VERSION.SDK_INT;
                    if (curApiVersion >= Build.VERSION_CODES.M) {
                        // 动态请求拨打电话权限
                        requestPermissions(
                                new String[] { Manifest.permission.CALL_PHONE },
                                0x11);
                    } else {
                        intentToCall(phone);
                    }
                } else {
                    intentToCall(phone);
                }
            }

private boolean hasPermission() {
        if (checkSelfPermission(Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED) {
            return false;
        }
        return true;
    }

    private void intentToCall(String phoneNumber) {
        Intent intent = new Intent(Intent.ACTION_CALL);
        Uri data = Uri.parse("tel:" + phoneNumber);
        intent.setData(data);
        startActivity(intent);
    }

    
    /**
     * 动态请求拨打电话权限后，监听用户的点击事件 
     */
    @Override
    public void onRequestPermissionsResult(int requestCode,
            String[] permissions, int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == 0x11) {
            // If request is cancelled, the result arrays are empty.
            if (grantResults.length > 0
                    && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                CldLog.i("CMCC", "权限被允许");
                String phone = mContactsInfo.getPhone();
                intentToCall(phone);
            } else {
                CldLog.i("CMCC", "权限被拒绝");
            }
        }
    }