// 檢查是否獲得了權(quán)限（Android6.0運(yùn)行時(shí)權(quán)限）
                if (ContextCompat.checkSelfPermission(MainActivity.this,
                        Manifest.permission.CALL_PHONE) != PackageManager.PERMISSION_GRANTED){                    // 沒(méi)有獲得授權(quán)，申請(qǐng)授權(quán)
                    if (ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this,
                            Manifest.permission.CALL_PHONE)) {                        // 返回值：//                          如果app之前請(qǐng)求過(guò)該權(quán)限,被用戶拒絕, 這個(gè)方法就會(huì)返回true.//                          如果用戶之前拒絕權(quán)限的時(shí)候勾選了對(duì)話框中”Don’t ask again”的選項(xiàng),那么這個(gè)方法會(huì)返回false.//                          如果設(shè)備策略禁止應(yīng)用擁有這條權(quán)限, 這個(gè)方法也返回false.
                        // 彈窗需要解釋為何需要該權(quán)限，再次請(qǐng)求授權(quán)
                        Toast.makeText(MainActivity.this, "請(qǐng)授權(quán)！", Toast.LENGTH_LONG).show();                        // 幫跳轉(zhuǎn)到該應(yīng)用的設(shè)置界面，讓用戶手動(dòng)授權(quán)
                        Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
                        Uri uri = Uri.fromParts("package", getPackageName(), null);
                        intent.setData(uri);
                        startActivity(intent);
                    }else{                        // 不需要解釋為何需要該權(quán)限，直接請(qǐng)求授權(quán)
                        ActivityCompat.requestPermissions(MainActivity.this,                                new String[]{Manifest.permission.CALL_PHONE},
                                MY_PERMISSIONS_REQUEST_CALL_PHONE);
                    }
                }else {                    // 已經(jīng)獲得授權(quán)，可以打電話
                 
                 

//用intent啟動(dòng)撥打電話
Intent intent = new Intent(Intent.ACTION_CALL, Uri.parse("tel:" + mobile));
startActivity(intent);
                }