Android:IntentService 致命异常

Question

我正在尝试用 Kotlin 编写一个 CallRecorder 应用程序。我想要做的是开始使用 BroadcastReceiver 启动的服务录制音频。我认为我在 MediaRecorder 初始化方面做错了什么，但我不知道是什么。

编辑:找到并解决了 MediaRecorder 问题(将文件名从“dd.MMM.yyyy-HH:mm:ss”更改为“dd.MMM.yyyy”。Android 不喜欢文件名中的冒号)。现在它给了我一个关于 IntentService 的“致命异常(exception)”。查看下面更新的堆栈跟踪。

list :

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

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <service android:name=".RecordService"
             android:exported="false"/>
    <receiver android:name=".CallReceiver"  android:exported="true">
        <intent-filter>
            <action android:name="android.intent.action.PHONE_STATE"/>
        </intent-filter>
    </receiver>
    <activity
        android:name=".MainActivity"
        android:label="@string/app_name"
        android:theme="@style/AppTheme.NoActionBar">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

主要 Activity :

class MainActivity : AppCompatActivity(), NavigationView.OnNavigationItemSelectedListener, ActivityCompat.OnRequestPermissionsResultCallback {

private val READ_PHONE_STATE : String = Manifest.permission.READ_PHONE_STATE
private val RECORD_AUDIO : String = Manifest.permission.RECORD_AUDIO
private val WRITE_EXTERNAL_STORAGE : String = Manifest.permission.WRITE_EXTERNAL_STORAGE
private val PERMISSION_LIST = arrayOf(READ_PHONE_STATE, RECORD_AUDIO, WRITE_EXTERNAL_STORAGE)
private val REQUEST_CODE : Int = 101
private val PERMISSION_GRANTED : Int = PackageManager.PERMISSION_GRANTED

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)
    setSupportActionBar(toolbar)

    /*fab.setOnClickListener { view ->
        Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                .setAction("Action", null).show()
    }*/

    checkPermissions()

    val toggle = ActionBarDrawerToggle(
            this, drawer_layout, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close)
    drawer_layout.addDrawerListener(toggle)
    toggle.syncState()

    nav_view.setNavigationItemSelectedListener(this)
}

fun checkPermissions(){
    var tempPermissionList : Array<String?> = arrayOfNulls(3)
    var position : Int = 0
    for(permission in PERMISSION_LIST){
        if(ContextCompat.checkSelfPermission(this, permission) != PERMISSION_GRANTED) tempPermissionList.set(position, permission)
        position++
    }
    if(!tempPermissionList.isEmpty()){
        ActivityCompat.requestPermissions(this, tempPermissionList, REQUEST_CODE)
    }
}



override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
    if(requestCode == REQUEST_CODE) super.onRequestPermissionsResult(requestCode, permissions, grantResults)
}

override fun onBackPressed() {
    if (drawer_layout.isDrawerOpen(GravityCompat.START)) {
        drawer_layout.closeDrawer(GravityCompat.START)
    } else {
        super.onBackPressed()
    }
}

override fun onCreateOptionsMenu(menu: Menu): Boolean {
    // Inflate the menu; this adds items to the action bar if it is present.
    menuInflater.inflate(R.menu.main, menu)
    return true
}

override fun onOptionsItemSelected(item: MenuItem): Boolean {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    when (item.itemId) {
        R.id.action_settings -> return true
        else -> return super.onOptionsItemSelected(item)
    }
}

override fun onNavigationItemSelected(item: MenuItem): Boolean {
    // Handle navigation view item clicks here.
    when (item.itemId) {
        R.id.nav_camera -> {
            // Handle the camera action
        }
        R.id.nav_gallery -> {

        }
        R.id.nav_slideshow -> {

        }
        R.id.nav_manage -> {

        }
        R.id.nav_share -> {

        }
        R.id.nav_send -> {

        }
    }

    drawer_layout.closeDrawer(GravityCompat.START)
    return true
}

记录器:

class Recorder {

val TAG : String = "RECORDER"

var mediaRecorder : MediaRecorder? = null

fun startRecording(){
    if(mediaRecorder != null){
        mediaRecorder!!.stop()
        mediaRecorder!!.reset()
        mediaRecorder!!.release()
        mediaRecorder = null
    }
    mediaRecorder = MediaRecorder()
    mediaRecorder!!.setAudioSource(MediaRecorder.AudioSource.VOICE_CALL)
    mediaRecorder!!.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP)
    mediaRecorder!!.setOutputFile(generateFilePath())
    mediaRecorder!!.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_WB)

    try {
        mediaRecorder!!.prepare()
    } catch (e:Exception){
        Log.e(TAG, "prepare() failed")
    }

    mediaRecorder!!.start()
}

fun stopRecording(){
    if(mediaRecorder != null){
        mediaRecorder!!.stop()
        mediaRecorder!!.release()
        mediaRecorder = null
    }
}

private fun getCurrentDate() : String{
    val calendar = java.util.Calendar.getInstance()
    val dateFormat = SimpleDateFormat("dd.MMM.yyyy")
    val date : String = dateFormat.format(calendar.time)
    return date
}

private fun generateFilePath() : String{
    return Environment.getExternalStorageDirectory().absolutePath + "/" + getCurrentDate() + ".3gp"
}

调用接收者:

class CallReceiver : BroadcastReceiver() {

private val TAG = "CALL_RECEIVER"
private val PHONE_STATE : String = "PHONE_STATE"
private val START_RECORDING : String = "START_RECORDING"
private val STOP_RECORDING : String = "STOP_RECORDING"
//private lateinit var mRecorder : Recorder

override fun onReceive(context: Context?, intent: Intent?) {
    val phoneState : String? = intent?.getStringExtra(TelephonyManager.EXTRA_STATE)
    if(phoneState.equals(TelephonyManager.EXTRA_STATE_OFFHOOK)){
        Toast.makeText(context, "REGISTRAZIONE INIZIATA", Toast.LENGTH_SHORT).show()
        Log.d(TAG, "START RECORDING")
        var intent2 = Intent(context, RecordService::class.java)
        intent2.putExtra(PHONE_STATE, START_RECORDING)
        context?.startService(intent2)
        //if(mRecorder == null) mRecorder = Recorder()
        //mRecorder.startRecording()
    } else if (phoneState.equals(TelephonyManager.EXTRA_STATE_IDLE)){
        Toast.makeText(context, "REGISTRAZIONE TERMINATA", Toast.LENGTH_SHORT).show()
        Log.d(TAG, "STOP RECORDING")
        var intent3 = Intent(context, RecordService::class.java)
        intent3.putExtra(PHONE_STATE, STOP_RECORDING)
        context?.startService(intent3)
        //mRecorder.stopRecording()
    }
}

记录服务:

class RecordService : IntentService("RecordService") {

private val PHONE_STATE : String = "PHONE_STATE"
private val START_RECORDING : String = "START_RECORDING"
private val STOP_RECORDING : String = "STOP_RECORDING"
private lateinit var mRecorder : Recorder

override fun onCreate() {

    mRecorder = Recorder()

    super.onCreate()
}

override fun onHandleIntent(intent: Intent?) {
    when(intent?.getStringExtra(PHONE_STATE)){

        START_RECORDING -> mRecorder.startRecording()

        STOP_RECORDING -> mRecorder.stopRecording()
    }
}

override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
    return super.onStartCommand(intent, flags, startId)
}

堆栈跟踪:

06-25 19:11:12.889 9104-9104/com.example.luca.kallrecorder D/CALL_RECEIVER: START RECORDING
06-25 19:11:12.897 9104-9104/com.example.luca.kallrecorder D/CALL_RECEIVER: START RECORDING
06-25 19:11:12.928 9104-9123/com.example.luca.kallrecorder D/EGL_emulation: eglMakeCurrent: 0xae834c40: ver 2 0
06-25 19:11:12.930 9104-9139/com.example.luca.kallrecorder E/MediaRecorder: start failed: -2147483648
06-25 19:11:12.931 9104-9139/com.example.luca.kallrecorder E/AndroidRuntime: FATAL EXCEPTION: IntentService[RecordService]
    Process: com.example.luca.kallrecorder, PID: 9104
    java.lang.RuntimeException: start failed.
        at android.media.MediaRecorder.start(Native Method)
        at com.example.luca.kallrecorder.Recorder.startRecording(Recorder.kt:33)
        at com.example.luca.kallrecorder.RecordService.onHandleIntent(RecordService.kt:25)
        at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:65)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:135)
        at android.os.HandlerThread.run(HandlerThread.java:61)
06-25 19:11:12.952 9104-9123/com.example.luca.kallrecorder V/RenderScript: 0xae8eb800 Launching thread(s), CPUs 4
06-25 19:11:14.891 9104-9123/com.example.luca.kallrecorder D/EGL_emulation: eglMakeCurrent: 0xae834c40: ver 2 0
06-25 19:11:14.929 9104-9123/com.example.luca.kallrecorder D/EGL_emulation: eglMakeCurrent: 0xae834c40: ver 2 0

Answer 1

正如 Mike M. 在评论中所建议的，我通过实现服务而不是 IntentService 来解决。我引用 Mike M. 的话:“IntentService... 每次 onHandleIntent() 完成后都会立即停止。”。我想一旦系统失去对 onHandleIntent() 的引用，MediaRecorder 实例就会消失。

我的应用程序还没有按预期工作，但这不是因为那个错误。实际上它现在编译和运行没有任何错误。

这是更新的 RecordService 类，实现服务:

class RecordService : Service() {

private val PHONE_STATE : String = "PHONE_STATE"
private val START_RECORDING : String = "START_RECORDING"
private val STOP_RECORDING : String = "STOP_RECORDING"
private var mRecorder : Recorder? = null

private lateinit var mServiceLooper : Looper



override fun onCreate() {

    mRecorder = Recorder()

    super.onCreate()
}

override fun onBind(intent: Intent?): IBinder {
    TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
}


override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {

    when(intent?.getStringExtra(PHONE_STATE)){

        START_RECORDING -> thread { Runnable { kotlin.run { mRecorder!!.stopRecording() } } }

        STOP_RECORDING -> thread { Runnable { kotlin.run { mRecorder!!.stopRecording() } } }
    }

    return super.onStartCommand(intent, flags, startId)
}