如何知道我是否在Android上的电话？ [英] How to know whether I am in a call on Android?

问题描述

我想知道我是否在通话中。

I want to know whether I am in a call.

如果我在一个电话然后启动服务（服务部分是明显的）。如何做到这一点？

If I am in a call then start the service (service part is clear). How do I do this?

在出席我需要拨打服务电话......我不知道如何做到这一点？任何帮助？

While attending the call I need to call the service... I am unaware of how to do this? Any help?

推荐答案

您需要的广播接收器...

You need broadcast receiver ...

在清单申报广播接收器...

In manifest declare broadcast receiver ...

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

另外申报用途，权限...

Also declare uses-permission ...

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

广播接收机类...

The broadcast receiver class ...

package x.y;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;

public class PhoneStateBroadcastReceiver extends BroadcastReceiver{

    @Override
    public void onReceive(Context context, Intent intent) {

        TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
        telephonyManager.listen(new CustomPhoneStateListener(context), PhoneStateListener.LISTEN_CALL_STATE);

    }

}

和一个类来定制手机状态听众......

And one class to customize phone state listener...

package x.y;
import android.content.Context;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;

public class CustomPhoneStateListener extends PhoneStateListener {

    //private static final String TAG = "PhoneStateChanged";
    Context context; //Context to make Toast if required 
    public CustomPhoneStateListener(Context context) {
        super();
        this.context = context;
    }

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

        switch (state) {
        case TelephonyManager.CALL_STATE_IDLE:
            //when Idle i.e no call
            Toast.makeText(context, "Phone state Idle", Toast.LENGTH_LONG).show();
            break;
        case TelephonyManager.CALL_STATE_OFFHOOK:
            //when Off hook i.e in call
            //Make intent and start your service here
            Toast.makeText(context, "Phone state Off hook", Toast.LENGTH_LONG).show();
            break;
        case TelephonyManager.CALL_STATE_RINGING:
            //when Ringing
            Toast.makeText(context, "Phone state Ringing", Toast.LENGTH_LONG).show();
            break;
        default:
            break;
        }
    }
}

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