失眠网 > Xamarin.Android实现自动拨打及挂断电话的功能

Xamarin.Android实现自动拨打及挂断电话的功能

时间：2024-05-14 11:02:44

1、说明

这几天刚刚整理了两篇文章：Xamarin.Android实现拨打电话的功能和 Xamarin.Android实现闹钟的功能。就和apple-pen的故事一样，于是两篇文章又攒出一个新的：定时打电话功能

本篇纯属技术交流，请务必正确使用。

2、具体实现

2.1 效果

2.2 原理说明

先定义一个广播接收器，监听闹钟的状态。当闹钟到点后，广播接收器接收到信息，于是启动拨打电话的activity（本篇中的PhoneActivity），在PhoneActivity中启用电话监听器(PhoneStateListener)，当发现电话已接通时，进行如下动作：关闭电话、关闭PhoneActivity。然后继续循环以上。

2.3 具体代码实现

2.3.1 layout

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="/apk/res/android"xmlns:app="/apk/res-auto"xmlns:tools="/tools"android:layout_width="match_parent"android:layout_height="match_parent"><EditTextandroid:id="@+id/phoneNumber"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginTop="28dp"android:textSize="25dp"android:textStyle="bold"android:ems="10"android:hint="设置要呼叫的电话号码"android:inputType="phone" /><EditTextandroid:id="@+id/timeTxt"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginTop="28dp"android:textSize="25dp"android:textStyle="bold"android:layout_below="@+id/phoneNumber"android:ems="10"android:hint="设置当前时间几秒后开始"android:inputType="numberDecimal" /><EditTextandroid:id="@+id/initTime"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginTop="28dp"android:textSize="25dp"android:textStyle="bold"android:layout_below="@+id/timeTxt"android:ems="10"android:hint="设置间隔(请>=60)秒"android:inputType="numberDecimal" /><Buttonandroid:id="@+id/startBtn"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginRight="60dp"android:layout_marginTop="240dp"android:text="开始" /><androidx.coordinatorlayout.widget.CoordinatorLayoutandroid:minWidth="25px"android:minHeight="25px"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignParentBottom="true"android:id="@+id/coordinatorLayout1" /></RelativeLayout>

2.3.3 广播接收器

using Android.Content;using Android.Widget;namespace AlarmDemo{[BroadcastReceiver]public class MyReceiver : BroadcastReceiver{public override void OnReceive(Context context, Intent intent){Intent phoneIntent = new Intent(context, typeof(PhoneActivity));phoneIntent.AddFlags(ActivityFlags.NewTask); //新开一个线程承载活动phoneIntent.PutExtra("phoneNumber", intent.GetStringExtra("phoneNumber"));context.StartActivity(phoneIntent); //开启新活动，进行拨打电话}}}

2.3.3 拨打电话的Activity

完成电话的拨打和挂断

using Android.App;using Android.Content;using Android.OS;using Android.Telephony;using Android.Widget;using System;using System.Threading;namespace AlarmDemo{[Activity(Label = "PhoneActivity")]public class PhoneActivity : Activity{private Android.Telecom.TelecomManager telecomManager = null;protected override void OnCreate(Bundle savedInstanceState){base.OnCreate(savedInstanceState);// Create your application here//参数初始化//关掉电话的managertelecomManager = (Android.Telecom.TelecomManager)GetSystemService(Context.TelecomService);//调用系统方法（监听电话状态）MyPhoneStateListener phoneStateListener = new MyPhoneStateListener(telecomManager,this);TelephonyManager telephonyManager = (TelephonyManager)GetSystemService(Context.TelephonyService);telephonyManager.Listen(phoneStateListener, PhoneStateListenerFlags.CallState);try {var intent = new Intent(Intent.ActionCall);intent.SetData(.Uri.Parse("tel:" + Intent.GetStringExtra("phoneNumber")));StartActivity(intent);}catch(Exception ex){Toast.MakeText(this, ex.Message, ToastLength.Long).Show();}}}public class MyPhoneStateListener : PhoneStateListener{private Android.Telecom.TelecomManager v_telecomManager;private PhoneActivity v_phoneActivity;public MyPhoneStateListener(Android.Telecom.TelecomManager v_telecomManager, PhoneActivity phoneActivity){this.v_telecomManager = v_telecomManager;this.v_phoneActivity = phoneActivity;}public override void OnCallStateChanged(CallState state, string incomingNumber){base.OnCallStateChanged(state, incomingNumber);switch (state){case CallState.Offhook: //若电话接通了，则进行挂断Thread.Sleep(3000);this.v_telecomManager.EndCall(); //关闭电话v_phoneActivity.Finish();break;default:break;}}}}

2.3.4 主界面Activity

主要完成权限判断，并启动闹钟

using Android;using Android.App;using Android.Content;using Android.Content.PM;using Android.OS;using Android.Runtime;using Android.Views;using Android.Widget;using AndroidX.AppCompat.App;using AndroidX.CoordinatorLayout.Widget;using AndroidX.Core.App;using Google.Android.Material.Snackbar;using Java.Lang;using System;namespace AlarmDemo{[Activity(Label = "@string/app_name", Theme = "@style/AppTheme", MainLauncher = true)]public class MainActivity : AppCompatActivity{//DECLARE WIDGETSprivate Button startBtn;private EditText timeTxt,internalTxt,phoneNumberTxt;private CoordinatorLayout coordinatorLayout;private const int REQUEST_CALL = 1,STOP_CALL=2, ALL_ALLOW=3;protected override void OnCreate(Bundle savedInstanceState){base.OnCreate(savedInstanceState);Xamarin.Essentials.Platform.Init(this, savedInstanceState);// Set our view from the "main" layout resourceSetContentView(Resource.Layout.activity_main);this.initializeViews();}public override void OnRequestPermissionsResult(int requestCode, string[] permissions, [GeneratedEnum] Android.Content.PM.Permission[] grantResults){Xamarin.Essentials.Platform.OnRequestPermissionsResult(requestCode, permissions, grantResults);if(requestCode== ALL_ALLOW){if ((grantResults.Length == 2) && (grantResults[0] == Permission.Granted) && (grantResults[1] == Permission.Granted)){go();//调用拨打电话的具体方法}else{Snackbar.Make(coordinatorLayout, "用户未能授予拨打电话的权限", Snackbar.LengthShort).Show();}}else{base.OnRequestPermissionsResult(requestCode, permissions, grantResults);}}private void initializeViews(){timeTxt = FindViewById<EditText>(Resource.Id.timeTxt);internalTxt = FindViewById<EditText>(Resource.Id.initTime);phoneNumberTxt = FindViewById<EditText>(Resource.Id.phoneNumber);startBtn = FindViewById<Button>(Resource.Id.startBtn);coordinatorLayout= FindViewById<CoordinatorLayout>(Resource.Id.coordinatorLayout1);startBtn.Click += startBtn_Click;}void startBtn_Click(object sender, EventArgs e){//checkPermission(this, "是否授予拨打电话的权限？", Manifest.Permission.CallPhone, REQUEST_CALL);checkPermission();}private void go(){//获取界面设置int time = Convert.ToInt32(timeTxt.Text);int intervalTime = Convert.ToInt32(internalTxt.Text);string phoneNulber = phoneNumberTxt.Text;Intent i = new Intent(this, typeof(MyReceiver));i.PutExtra("phoneNumber", phoneNulber);PendingIntent pi = PendingIntent.GetBroadcast(this, 0, i, 0); AlarmManager alarmManager = (AlarmManager)GetSystemService(AlarmService);//设置间隔alarmManager.SetRepeating(AlarmType.RtcWakeup, JavaSystem.CurrentTimeMillis() + (time * 1000), intervalTime*1000, pi);Toast.MakeText(this, "闹钟将在 " + time + " 秒之后启动！并间隔 "+ intervalTime+" 秒重复运行！", ToastLength.Short).Show();}private void checkPermission(Activity activity, string tips, string permission, int permission_code){if (ActivityCompat.ShouldShowRequestPermissionRationale(activity, permission)){var requiredPermissions = new System.String[] {permission };Snackbar.Make(coordinatorLayout, tips, Snackbar.LengthIndefinite).SetAction("同意授权",new Action<View>(delegate (View obj){ActivityCompat.RequestPermissions(this, requiredPermissions, permission_code);})).Show();}else{var requiredPermissions = new System.String[] {permission };ActivityCompat.RequestPermissions(this, requiredPermissions, permission_code);}}private void checkPermission(){if (ActivityCompat.ShouldShowRequestPermissionRationale(this, Manifest.Permission.CallPhone)){var requiredPermissions = new System.String[] {Manifest.Permission.CallPhone };Snackbar.Make(coordinatorLayout, "是否授予拨打电话的权限？", Snackbar.LengthIndefinite).SetAction("同意授权",new Action<View>(delegate (View obj){ActivityCompat.RequestPermissions(this, requiredPermissions, REQUEST_CALL);})).Show();}else if (ActivityCompat.ShouldShowRequestPermissionRationale(this, Manifest.Permission.AnswerPhoneCalls)){var requiredPermissions = new System.String[] {Manifest.Permission.AnswerPhoneCalls };Snackbar.Make(coordinatorLayout, "是否授予拨打电话的权限？", Snackbar.LengthIndefinite).SetAction("同意授权",new Action<View>(delegate (View obj){ActivityCompat.RequestPermissions(this, requiredPermissions, STOP_CALL);})).Show();}else{var requiredPermissions = new System.String[] {Manifest.Permission.CallPhone, Manifest.Permission.AnswerPhoneCalls };ActivityCompat.RequestPermissions(this, requiredPermissions, ALL_ALLOW);}}}}