【发布时间】：2015-08-15 22:14:05
【问题描述】：
我正在尝试为 phonegap 创建一个 android 插件，该插件开始记录噪音，当用户开始说话时停止噪音记录并开始新的语音记录。
我已经能够让它在 android 中运行，但是当我尝试将它添加为 phonegap 插件时它不起作用。
代码如下：
RecordVoice.js
var RecordVoice = {
startRecord: function(successCallback, errorCallback) {
cordova.exec(
successCallback, // success callback function
errorCallback, // error callback function
'RecordVoice', // mapped to our native Java class called "RecordVoicePlugin"
'startrecording');
}
}
module.exports = RecordVoice;
RecordVoice.java
package org.maria.RecordVoice;
import org.apache.cordova.CallbackContext;
import org.apache.cordova.CordovaPlugin;
import org.json.JSONObject;
import org.json.JSONArray;
import org.json.JSONException;
import android.app.Activity;
import android.content.Intent;
import com.androidexample.noisealert.R;
import android.app.Activity;
import android.content.Context;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.PowerManager;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;
import java.io.IOException;
public class NoiseAlert extends CordovaPlugin {
public static final String ACTION_ADD_RECORD_ENTRY = "startrecording";
/* constants */
private static final int POLL_INTERVAL = 300;
/** running state **/
private boolean mRunning = false;
/** config state **/
private int mThreshold;
private PowerManager.WakeLock mWakeLock;
private Handler mHandler = new Handler();
/* References to view elements */
private TextView mStatusView;
private SoundLevelView mDisplay;
/* sound data source */
private boolean thesholdReached =false;
@Override
public boolean execute(String action, JSONArray args, CallbackContext callbackContext) throws JSONException {
try {
if (ACTION_ADD_RECORD_ENTRY.equals(action)) {
JSONObject arg_object = args.getJSONObject(0);
cordova.getActivity().runOnUiThread(new Runnable() {
public void run() {
double amp = getAmplitude();
//Log.i("Noise", "runnable mPollTask");
updateDisplay(amp, amp);
if ((amp > mThreshold)) {
//start();
if(thesholdReached==false) {
stop();
startrecordingvoice();
// Show alert when noise thersold crossed
Toast.makeText(getApplicationContext(), "Noise Thersold Crossed, do here your stuff.",
Toast.LENGTH_LONG).show();
//callForHelp();
//Log.i("Noise", "==== onCreate ===");
thesholdReached=true;
}
}
callbackContext.success();
}
}
return true;
}
callbackContext.error("Invalid action");
return false;
} catch(Exception e) {
System.err.println("Exception: " + e.getMessage());
callbackContext.error(e.getMessage());
return false;
}
}
private void start() {
startrecordingnoise();
if (!mWakeLock.isHeld()) {
mWakeLock.acquire();
}
//Noise monitoring start
// Runnable(mPollTask) will execute after POLL_INTERVAL
mHandler.postDelayed(mPollTask, POLL_INTERVAL);
}
private void stop() {
Log.i("Noise", "==== Stop Noise Monitoring===");
if (mWakeLock.isHeld()) {
mWakeLock.release();
}
mHandler.removeCallbacks(mSleepTask);
mHandler.removeCallbacks(mPollTask);
if (mRecorder != null) {
mRecorder.stop();
mRecorder.release();
mRecorder = null;
}
mDisplay.setLevel(0,0);
mRunning = false;
}
private void initializeApplicationConstants() {
// Set Noise Threshold
mThreshold = 8;
}
private void updateDisplay(double ampl, double signalEMA) {
mStatusView.setText(Double.toString(ampl));
//
mDisplay.setLevel((int)signalEMA, mThreshold);
}
private void callForHelp() {
stop();
startrecordingvoice();
// Show alert when noise thersold crossed
Toast.makeText(getApplicationContext(), "Noise Thersold Crossed, do here your stuff.",
Toast.LENGTH_LONG).show();
}
// This file is used to record voice
static final private double EMA_FILTER = 0.6;
private MediaRecorder mRecorder = null;
private double mEMA = 0.0;
public void startrecordingnoise() {
if (mRecorder == null) {
String outputFile = null;
outputFile = Environment.getExternalStorageDirectory() + "/NoiseRecording.amr";
mRecorder = new MediaRecorder();
mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
//mRecorder.setOutputFile("/dev/null");
mRecorder.setOutputFile(outputFile);
try {
mRecorder.prepare();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mRecorder.start();
mEMA = 0.0;
}
}
public void startrecordingvoice() {
if (mRecorder == null) {
String outputFile = null;
outputFile = Environment.getExternalStorageDirectory() + "/VoiceRecording.amr";
mRecorder = new MediaRecorder();
mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
//mRecorder.setOutputFile("/dev/null");
mRecorder.setOutputFile(outputFile);
try {
mRecorder.prepare();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mRecorder.start();
mEMA = 0.0;
}
}
public double getAmplitude() {
if (mRecorder != null)
return (mRecorder.getMaxAmplitude()/2700.0);
else
return 0;
}
public double getAmplitudeEMA() {
double amp = getAmplitude();
mEMA = EMA_FILTER * amp + (1.0 - EMA_FILTER) * mEMA;
return mEMA;
}
};
index.js
var app = {
// Application Constructor
initialize: function() {
this.bindEvents();
},
// Bind Event Listeners
//
// Bind any events that are required on startup. Common events are:
// 'load', 'deviceready', 'offline', and 'online'.
bindEvents: function() {
document.addEventListener('deviceready', this.onDeviceReady, false);
},
// deviceready Event Handler
//
// The scope of 'this' is the event. In order to call the 'receivedEvent'
// function, we must explicitly call 'app.receivedEvent(...);'
onDeviceReady: function() {
app.receivedEvent('deviceready');
app.addToCal();
},
// Update DOM on a Received Event
receivedEvent: function(id) {
var parentElement = document.getElementById(id);
var listeningElement = parentElement.querySelector('.listening');
var receivedElement = parentElement.querySelector('.received');
listeningElement.setAttribute('style', 'display:none;');
receivedElement.setAttribute('style', 'display:block;');
console.log('Received Event: ' + id);
},
addToCal: function() {
var success = function() { alert("Success"); };
var error = function(message) { alert("Oopsie! " + message); };
RecordVoice.startRecord(success, error);
}
};
plugin.xml
<plugin xmlns="http://www.phonegap.com/ns/plugins/1.0"
id="org.maria.RecordVoice"
version="0.1.0">
<name>RecordVoice</name>
<description>Sample PhoneGap RecordVoice Plugin</description>
<license>MIT</license>
<keywords>phonegap,RecordVoice</keywords>
<js-module src="www/RecordVoice.js" name="RecordVoice">
<clobbers target="window.RecordVoice" />
</js-module>
<!-- android -->
<platform name="android">
<config-file target="res/xml/config.xml" parent="/*">
<feature name="RecordVoice">
<param name="android-package" value="org.maria.RecordVoice.RecordVoice"/>
</feature>
</config-file>
<source-file src="src/android/RecordVoice.java" target-dir="src/org/maria/RecordVoice" />
</platform>
知道为什么它不起作用吗？ 非常感谢您！
最好的问候！
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