Question

在我的应用程序中，我正在调用一些电话号码。有什么方法我可以检查是否有呼叫蜂鸣声，并建立连接以确保电话号码和结束呼叫的有效性，然后再接听。

Answer 1

1）首先，您必须在清单文件中添加以下权限：

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

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

2）然后你必须定义一个广播接收器

<receiver android:name=".AnswerCallBroadcastReceiver">
    <intent-filter> 
        <action android:name="android.intent.action.PHONE_STATE" />
        <action android:name="android.intent.action.NEW_OUTGOING_CALL" />
    </intent-filter>

然后在广播接收器中添加以下代码

public class AnswerCallBroadcastReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context arg0, Intent arg1) {

        if(arg1.getAction().equals("android.intent.action.PHONE_STATE")){

            String state = arg1.getStringExtra(TelephonyManager.EXTRA_STATE);

            if(state.equals(TelephonyManager.EXTRA_STATE_OFFHOOK)){
                Log.d(TAG, "Inside Extra state off hook");
                String number = arg1.getStringExtra(TelephonyManager.EXTRA_PHONE_NUMBER);
                Log.e(TAG, "outgoing number : " + number);              
            }       

            else if (state.equals(TelephonyManager.EXTRA_STATE_RINGING)){   
                Log.e(TAG, "Inside EXTRA_STATE_RINGING");
                String number = arg1.getStringExtra(TelephonyManager.EXTRA_INCOMING_NUMBER);
                Log.e(TAG, "incoming number : " + number);
            }
            else if(state.equals(TelephonyManager.EXTRA_STATE_IDLE)){
                Log.d(TAG, "Inside EXTRA_STATE_IDLE");
            }   
        }   
    }
}

Answer 2

我会尝试猜测你的代码，因为你没有给我任何线索:(

为了获得电话呼叫状态，您应该向Telephony Manager添加一个监听器。

创建一个监听器类：

// Or just make new PhoneStateListener() and override onCallStateChanged
public class PhoneCallListener extends PhoneStateListener {

    @Override
    public void onCallStateChanged(int state, String incomingNumber) {

        if (state == TelephonyManager.CALL_STATE_RINGING) {
            //A new call arrived and is ringing or waiting. In the latter case, another call is already active
        }

        if (state == TelephonyManager.CALL_STATE_OFFHOOK) {
            //At least one call exists that is dialing, active, or on hold, and no calls are ringing or waiting
        }

        if (state == TelephonyManager.CALL_STATE_IDLE) {
            //No activity
        }
    }
}

添加监听器：

PhoneCallListener phoneListener = new PhoneCallListener();
    TelephonyManager telephonyManager = (TelephonyManager)
            getSystemService(Context.TELEPHONY_SERVICE);
    telephonyManager.listen(phoneListener, PhoneStateListener.LISTEN_CALL_STATE);

在您收听电话呼叫状态后，您应该以这样的方式启动电话：

Intent callIntent = new Intent(Intent.ACTION_CALL);
CallInfo callInfo = new CallInfo(PHONE_NUMBER);
callIntent.setData(Uri.parse("tel:" + callInfo.getDialTo()));
//** Check for permision **//
startActivity(callIntent);

为了使这种情况正确发生，您必须获得执行呼叫和侦听电话呼叫状态的权限，因此请将以下权限添加到manifest.xml：

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

检查电话状态Android

2 个答案: