应用程序检测来电，并显示他们来的时候敬酒。该内部类 CallStateListener 负责检测电话：

Application detects incoming calls and displays a toast when they come. The inner class CallStateListener is responsible for detecting the call:

    private class CallStateListener extends PhoneStateListener {
        @Override
        public void onCallStateChanged(int state, String incomingNumber) {
            switch (state) {
            case TelephonyManager.CALL_STATE_RINGING:
                // called when someone is ringing to this phone

                Toast.makeText(ctx, "Incoming: " + incomingNumber, Toast.LENGTH_LONG).show();           
                break;
            }
        }
    }

但现在只需经过吐司显示我想取消/拒绝这个来电（任何）。 如何执行取消此来电？

but now just after a Toast is shown I would like to cancel/reject this incoming call(any). How to perform cancelling this incoming call?

全类看起来像这样：

package com.example.a;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.util.Log;
import android.widget.Toast;


public class CallHelper {

    /**
     * Listener to detect incoming calls.
     */
    private class CallStateListener extends PhoneStateListener {
        @Override
        public void onCallStateChanged(int state, String incomingNumber) {
            switch (state) {
            case TelephonyManager.CALL_STATE_RINGING:
                // called when someone is ringing to this phone

                Toast.makeText(ctx, "Incoming: " + incomingNumber, Toast.LENGTH_LONG).show();           
                break;
            }
        }
    }

    /**
     * Broadcast receiver to detect the outgoing calls.
     */
    public class OutgoingReceiver extends BroadcastReceiver {
        public OutgoingReceiver() {
        }

        @Override
        public void onReceive(Context context, Intent intent) {
            String number = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);

            Toast.makeText(ctx, "Outgoing: " + number, Toast.LENGTH_LONG).show();
        }

    }

    private Context ctx;
    private TelephonyManager tm;
    private CallStateListener callStateListener;

    private OutgoingReceiver outgoingReceiver;

    public CallHelper(Context ctx) {
        this.ctx = ctx;

        callStateListener = new CallStateListener();
        outgoingReceiver = new OutgoingReceiver();
    }

    /**
     * Start calls detection.
     */
    public void start() {
        tm = (TelephonyManager) ctx.getSystemService(Context.TELEPHONY_SERVICE);
        tm.listen(callStateListener, PhoneStateListener.LISTEN_CALL_STATE);

        IntentFilter intentFilter = new IntentFilter(Intent.ACTION_NEW_OUTGOING_CALL);
        ctx.registerReceiver(outgoingReceiver, intentFilter);
    }

    /**
     * Stop calls detection.
     */
/*  public void stop() {
        tm.listen(callStateListener, PhoneStateListener.LISTEN_NONE);
        ctx.unregisterReceiver(outgoingReceiver);
    }*/

}

编辑：

EDIT2 也许我没有权限：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.a"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="17"
        android:targetSdkVersion="17" />
    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
    <uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS" />
    <uses-permission android:name="android.permission.CALL_PHONE" />
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
         <service
            android:name=".CallDetectService"
            android:enabled="true"
            android:exported="false" >
        </service>
    </application>



</manifest>

更新的类

包com.example.a;

package com.example.a;

import java.lang.reflect.Method;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.widget.Toast;


public class CallHelper {

    /**
     * Listener to detect incoming calls.
     */
    private class CallStateListener extends PhoneStateListener {
        @Override
        public void onCallStateChanged(int state, String incomingNumber) {
            switch (state) {
            case TelephonyManager.CALL_STATE_RINGING:
                // called when someone is ringing to this phone
                Toast.makeText(ctx, "Incoming: " + incomingNumber, Toast.LENGTH_LONG).show();
                 try{
                        TelephonyManager tm = (TelephonyManager) ctx.getSystemService(Context.TELEPHONY_SERVICE);
                        Class c = Class.forName(tm.getClass().getName());
                        Method m = c.getDeclaredMethod("getITelephony");
                        com.android.internal.telephony.ITelephony telephonyService = (com.android.internal.telephony.ITelephony) m.invoke(tm);  

                        telephonyService = (com.android.internal.telephony.ITelephony) m.invoke(tm);
                        telephonyService.silenceRinger();
                        telephonyService.endCall();
                    }catch (Exception e) {
                        e.printStackTrace();

                    }
                break;
            }
        }
    }

    /**
     * Broadcast receiver to detect the outgoing calls.
     */
    public class OutgoingReceiver extends BroadcastReceiver {
        public OutgoingReceiver() {
        }

        @Override
        public void onReceive(Context context, Intent intent) {
            String number = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);

            Toast.makeText(ctx, "Outgoing: " + number, Toast.LENGTH_LONG).show();
        }

    }

    private Context ctx;
    private TelephonyManager tm;
    private CallStateListener callStateListener;

    private OutgoingReceiver outgoingReceiver;

    public CallHelper(Context ctx) {
        this.ctx = ctx;

        callStateListener = new CallStateListener();
        outgoingReceiver = new OutgoingReceiver();
    }

    /**
     * Start calls detection.
     */
    public void start() {
        tm = (TelephonyManager) ctx.getSystemService(Context.TELEPHONY_SERVICE);
        tm.listen(callStateListener, PhoneStateListener.LISTEN_CALL_STATE);

        IntentFilter intentFilter = new IntentFilter(Intent.ACTION_NEW_OUTGOING_CALL);
        ctx.registerReceiver(outgoingReceiver, intentFilter);
    }

    /**
     * Stop calls detection.
     */
    /*
     * public void stop() { tm.listen(callStateListener,
     * PhoneStateListener.LISTEN_NONE);
     * ctx.unregisterReceiver(outgoingReceiver); }
     */

}

修改3 链接项目： http://www.speedyshare.com/ccY6T/A1.zip

推荐答案

导入这些...

  import java.lang.reflect.Method;
  import android.app.Activity;  
  import android.telephony.TelephonyManager;
  import com.android.internal.telephony.*;

使用该code拒绝电话。

 try{
    TelephonyManager tm = (TelephonyManager)        context.getSystemService(Context.TELEPHONY_SERVICE);
    Class c = Class.forName(tm.getClass().getName());
    Method m = c.getDeclaredMethod("getITelephony");
    com.android.internal.telephony.ITelephony telephonyService = (ITelephony) m.invoke(tm);  
    telephonyService = (ITelephony) m.invoke(tm);
    telephonyService.silenceRinger();
    telephonyService.endCall();
}catch (Exception e) {
    e.printStackTrace();
      // Some problem occurred while accessing private API
    // TODO: do whatever error handling you want here  

}

添加这些权限到清单文件。

<uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS"/>
<uses-permission android:name="android.permission.CALL_PHONE" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />

在 com.android.internal.telephony 不是Android SDK的一部分。 你可以从这个Java文件这里。

The com.android.internal.telephony is not part of the Android SDK. You can get this Java file from here.

注意：

在这里，我们使用 Java反射。这些方法都存在，但它们都被标记为私人。使用反射，我们可以得到很多信息类，甚至被认为是私人的信息。由于这是一个不支持的API可能无法在所有设备上工作，它可能会在Android中的未来版本中改变

Here we uses Java reflection.These methods are there, but they are marked as "private". Using reflection, we can get lots of information about classes, even the information that is considered "private". Since this is an "unsupported API" it may not work on all devices and it may be changed in a future release of Android