如何停止媒体播放器时接收呼叫在kotlin

Question

我已经完成了音乐播放器应用程序，但当我接到电话或Whatsapp等时，我不知道如何控制媒体播放器。你能帮我吗。

val phoneStateListener: PhoneStateListener = object : PhoneStateListener() {
override fun onCallStateChanged(state: Int, incomingNumber: String) {
if (state == TelephonyManager.CALL_STATE_RINGING) {
//Incoming call: Pause music
} else if (state == TelephonyManager.CALL_STATE_IDLE) {
//Not in call: Play music
} else if (state == TelephonyManager.CALL_STATE_OFFHOOK) {
//A call is dialing, active or on hold
}
super.onCallStateChanged(state, incomingNumber)
}
}
val mgr = getSystemService(TELEPHONY_SERVICE) as TelephonyManager
mgr?.listen(phoneStateListener, PhoneStateListener.LISTEN_CALL_STATE)

Answer 1

您的代码是正确的！正如你提到的，你已经完成了你的音乐播放器，所以我不写MediaPlayer代码。我认为你有这样的东西：

mp = MediaPlayer()

现在，如果你想在活动中编码：

import android.os.Bundle
import android.telephony.PhoneStateListener
import android.telephony.TelephonyManager
import androidx.appcompat.app.AppCompatActivity
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
val phoneStateListener: PhoneStateListener = object : PhoneStateListener() {
override fun onCallStateChanged(state: Int, incomingNumber: String) {
if (state == TelephonyManager.CALL_STATE_RINGING) {
//Incoming call: Pause music
mp!!.pause()
} else if (state == TelephonyManager.CALL_STATE_IDLE) {
//Not in call: Play music
if(mp != null){
mp!!.start()
}
} else if (state == TelephonyManager.CALL_STATE_OFFHOOK) {
//A call is dialing, active or on hold
mp!!.pause()
}
super.onCallStateChanged(state, incomingNumber)
}
}
val mgr = getSystemService(TELEPHONY_SERVICE) as TelephonyManager
mgr.listen(phoneStateListener, PhoneStateListener.LISTEN_CALL_STATE)
}
}

如果你想在Fragment:中编码

import android.content.Context
import android.os.Bundle
import android.telephony.PhoneStateListener
import android.telephony.TelephonyManager
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.fragment.app.Fragment
class HomeFragment : Fragment() {
override fun onCreateView(
inflater: LayoutInflater,
container: ViewGroup?,
savedInstanceState: Bundle?
): View? {
return inflater.inflate(R.layout.fragment_home, container, false)
}
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
val mgr = activity?.getSystemService(Context.TELEPHONY_SERVICE) as TelephonyManager
mgr.listen(phoneStateListener, PhoneStateListener.LISTEN_CALL_STATE)
}
val phoneStateListener: PhoneStateListener = object : PhoneStateListener() {
override fun onCallStateChanged(state: Int, incomingNumber: String) {
if (state == TelephonyManager.CALL_STATE_RINGING) {
//Incoming call: Pause music
mp!!.pause()
} else if (state == TelephonyManager.CALL_STATE_IDLE) {
//Not in call: Play music
if(mp != null){
mp!!.start()
}
} else if (state == TelephonyManager.CALL_STATE_OFFHOOK) {
//A call is dialing, active or on hold
mp!!.pause()
}
super.onCallStateChanged(state, incomingNumber)
}
}
}

希望它能帮助你，我刚刚测试了它，它成功了！