Android应用源码之SpeechRecorder-IT计算机-毕业设计.zip

/* * Copyright (C) 2007 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.android.speechrecorder; import android.app.Activity; import android.os.Bundle; import android.os.Handler; import android.speech.srec.Recognizer; import android.speech.srec.WaveHeader; import android.speech.srec.MicrophoneInputStream; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.RadioButton; import android.widget.TextView; import java.io.BufferedWriter; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileFilter; import java.io.FileOutputStream; import java.io.FileWriter; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; public class SpeechRecorderActivity extends Activity { private static final String TAG = "SpeechRecorderActivity"; private static final int DURATION_SEC = 7; private Handler mHandler; private TextView mCommand; private TextView mStatus; private Button mRecord; private Button mRedo; private RadioButton m8KHz; private RadioButton m11KHz; private RadioButton mCall; private RadioButton mDialNanp; private RadioButton mDialPairs; private InputStream mMicrophone; private ByteArrayOutputStream mBaos; private File mUtterance; private int mSampleRate; private Thread mThread; private boolean mStoppedListening; @Override protected void onCreate(Bundle icicle) { super.onCreate(icicle); mHandler = new Handler(); setContentView(R.layout.recorder); mCommand = (TextView) findViewById(R.id.commandText); mStatus = (TextView) findViewById(R.id.statusText); mRecord = (Button) findViewById(R.id.recordButton); mRedo = (Button) findViewById(R.id.redoButton); m8KHz = (RadioButton)findViewById(R.id.codec8KHzRadioButton); m11KHz = (RadioButton)findViewById(R.id.codec11KHzRadioButton); mCall = (RadioButton)findViewById(R.id.callRadioButton); mDialNanp = (RadioButton)findViewById(R.id.dialNanpRadioButton); mDialPairs = (RadioButton)findViewById(R.id.dialPairsRadioButton); mCommand.setText("Please click 'Record' to begin"); mRecord.setOnClickListener(new OnClickListener() { public void onClick(View v) { if (false) { Log.d(TAG, "mRecord.OnClickListener.onClick"); } setupRecording(); } }); mRedo.setEnabled(false); mRedo.setOnClickListener(new OnClickListener() { public void onClick(View v) { if (false) { Log.d(TAG, "mRedo.onClickListener.onClick"); } mUtterance.delete(); setupRecording(); } }); m8KHz.setText("PCM/16bit/8KHz"); m11KHz.setText("PCM/16bit/11KHz"); m11KHz.setChecked(true); mCall.setChecked(true); } private void setupRecording() { Log.d(TAG, "setupRecording"); // disable buttons mRedo.setEnabled(false); mRecord.setEnabled(false); m8KHz.setFocusable(false); m11KHz.setFocusable(false); mCall.setFocusable(false); mDialNanp.setFocusable(false); mDialPairs.setFocusable(false); // find the first utterance not covered String[] utterances = mCall.isChecked() ? mCallUtterances : mDialNanp.isChecked() ? mDialNanpUtterances : mDialPairs.isChecked() ? mDialPairsUtterances : null; mUtterance = null; int index = -1; for (int i = 0; i < utterances.length; i++) { File u = new File(getDir("recordings", MODE_PRIVATE), utterances[i].toLowerCase().replace(' ', '_') + ".wav"); if (!u.exists()) { mUtterance = u; index = i; break; } } // check if done if (mUtterance == null) { mCommand.setText("Finished: Thank You!"); return; } Log.d(TAG, "going to record " + mUtterance.toString()); // fix up UI mCommand.setText("Say: \"" + utterances[index] + "\""); final String status = "item " + (index + 1) + "/" + utterances.length; // start the microphone mSampleRate = m8KHz.isChecked()? 8000 : m11KHz.isChecked() ? 11025 : 11025; mBaos = new ByteArrayOutputStream(mSampleRate * 2 * 20); try { mMicrophone = new MicrophoneInputStream(mSampleRate, mSampleRate * 15); // mMicrophone = logInputStream(mUtterance.toString(), mMicrophone, mSampleRate); } catch (IOException e) { } // post a number of delayed events to update the UI and to stop recording // after a few seconds. for (int i = 0; i <= DURATION_SEC; i++) { final int remain = DURATION_SEC - i; mHandler.postDelayed(new Runnable() { public void run() { if (remain > 0) { mStatus.setText(status + " Recording... " + remain); } else { mStatus.setText(status); stopRecording(); } } }, i * 1000); } // now start a thread to store the audio. mStoppedListening = false; mThread = new Thread() { public void run() { Log.d(TAG, "run audio capture thread"); byte buffer[] = new byte[512]; while (!mStoppedListening) { try { int rtn = 0; rtn = mMicrophone.read(buffer, 0, 512); if (rtn > 0) mBaos.write(buffer, 0, rtn); } catch (IOException e) { } } } }; mThread.start(); // to avoid the button click try { Thread.sleep(100); } catch (InterruptedException ie) { } } private void stopRecording() { Log.d(TAG, "stopRecording"); mStoppedListening = true; try { mThread.join(); } catch (InterruptedException e) { } try { OutputStream out = new FileOutputStream(mUtterance.toString()); try { byte[] pcm = mBaos.toByteArray(); Log.d(TAG, "byteArray length " + pcm.length); WaveHeader hdr = new WaveHeader(WaveHeader.FORMAT_PCM, (short)1, mSampleRate, (short)16, pcm.length); hdr.write(out); out.write(pcm); } finally { out.close(); mMicrophone.close(); mBaos.close(); } } catch (IOException e) { } finally { } // stop the recording mRecord.setEnabled(true); mRedo.setEnabled(true); mCommand.setText("Got it!"); } private final static String[] mCallUtterances = new String[] { "Call Adam Varro", "Call Alex Lloyd", "Call Amod Karve", "Call Ana Maria Lopez", "Call Ben