Android開發--仿微信語音對講錄音

原文地址：http://www.2cto.com/kf/201502/378704.html

自微信出現以來取得了很好的成績，語音對講的實現更加方便了人與人之間的交流。今天來實踐一下微信的語音對講的錄音實現，這個也比較容易實現。在 此，我將該按鈕封裝成爲一個控件，並經過策略模式的方式實現錄音和界面的解耦合，以方便咱們在實際狀況中對錄音方法的不一樣需求（例如想要實現wav格式的 編碼時咱們也就不能再使用MediaRecorder，而只能使用AudioRecord進行處理）。
效果圖：

實現思路

1.在微信中咱們能夠看到實現語音對講的是經過點按按鈕來完成的，所以在這裏我選擇從新本身的控件使其繼承自Button並重寫onTouchEvent方法，來實現對錄音的判斷。
2.在onTouchEvent方法中，
當咱們按下按鈕時，首先顯示錄音的對話框，而後調用錄音準備方法並開始錄音，接着開啓一個計時線程，每隔0.1秒的時間獲取一次錄音音量的大小，並經過Handler根據音量大小更新Dialog中的顯示圖片；
當咱們移動手指時，若手指向上移動距離大於50，在Dialog中顯示鬆開手指取消錄音的提示，並將isCanceled變量（表示咱們最後是否取消了錄音）置爲true，上移動距離小於20時，咱們恢復Dialog的圖片，並將isCanceled置爲false；
當擡起手指時，咱們首先關閉錄音對話框，接着調用錄音中止方法並關閉計時線程，而後咱們判斷是否取消錄音，如果的話則刪除錄音文件，不然判斷計時時間是否過短，最後調用回調接口中的recordEnd方法。
3.在這裏爲了適應不一樣的錄音需求，我使用了策略模式來進行處理，將每個不一樣的錄音方法視爲一種不一樣的策略，根據本身的須要去改寫。

注意問題

1.在onTouchEvent的返回值中應該返回true，這樣才能屏蔽以後其餘的觸摸事件，不然當手指滑動離開Button以後將不能在響應咱們的觸摸方法。
2.不要忘記爲本身的App添加權限：

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<code class = "hljs" xml= "" >    <uses-permission android:name= "android.permission.RECORD_AUDIO" >      <uses-permission android:name= "android.permission.WRITE_EXTERNAL_STORAGE" >      <uses-permission android:name= "android.permission.READ_EXTERNAL_STORAGE" ></uses-permission></uses-permission></uses-permission></code>

代碼參考

RecordButton 類，咱們的自定義控件，從新複寫了onTouchEvent方法

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<code class = "hljs" java= "" > package com.example.recordtest;   import android.annotation.SuppressLint; import android.app.Dialog; import android.content.Context; import android.os.Handler; import android.os.Message; import android.util.AttributeSet; import android.view.Gravity; import android.view.LayoutInflater; import android.view.MotionEvent; import android.view.View; import android.widget.Button; import android.widget.ImageView; import android.widget.TextView; import android.widget.Toast;   public class RecordButton extends Button {        private static final int MIN_RECORD_TIME = 1 ; // 最短錄音時間，單位秒      private static final int RECORD_OFF = 0 ; // 不在錄音      private static final int RECORD_ON = 1 ; // 正在錄音        private Dialog mRecordDialog;      private RecordStrategy mAudioRecorder;      private Thread mRecordThread;      private RecordListener listener;        private int recordState = 0 ; // 錄音狀態      private float recodeTime = 0 .0f; // 錄音時長，若是錄音時間過短則錄音失敗      private double voiceValue = 0.0 ; // 錄音的音量值      private boolean isCanceled = false ; // 是否取消錄音      private float downY;        private TextView dialogTextView;      private ImageView dialogImg;      private Context mContext;        public RecordButton(Context context) {          super (context);          // TODO Auto-generated constructor stub          init(context);      }        public RecordButton(Context context, AttributeSet attrs, int defStyle) {          super (context, attrs, defStyle);          // TODO Auto-generated constructor stub          init(context);      }        public RecordButton(Context context, AttributeSet attrs) {          super (context, attrs);          // TODO Auto-generated constructor stub          init(context);      }        private void init(Context context) {          mContext = context;          this .setText(按住 說話);      }        public void setAudioRecord(RecordStrategy record) {          this .mAudioRecorder = record;      }        public void setRecordListener(RecordListener listener) {          this .listener = listener;      }        // 錄音時顯示Dialog      private void showVoiceDialog( int flag) {          if (mRecordDialog == null ) {              mRecordDialog = new Dialog(mContext, R.style.Dialogstyle);              mRecordDialog.setContentView(R.layout.dialog_record);              dialogImg = (ImageView) mRecordDialog                      .findViewById(R.id.record_dialog_img);              dialogTextView = (TextView) mRecordDialog                      .findViewById(R.id.record_dialog_txt);          }          switch (flag) {          case 1 :              dialogImg.setImageResource(R.drawable.record_cancel);              dialogTextView.setText(鬆開手指可取消錄音);              this .setText(鬆開手指 取消錄音);              break ;            default :              dialogImg.setImageResource(R.drawable.record_animate_01);              dialogTextView.setText(向上滑動可取消錄音);              this .setText(鬆開手指 完成錄音);              break ;          }          dialogTextView.setTextSize( 14 );          mRecordDialog.show();      }        // 錄音時間過短時Toast顯示      private void showWarnToast(String toastText) {          Toast toast = new Toast(mContext);          View warnView = LayoutInflater.from(mContext).inflate(                  R.layout.toast_warn, null );          toast.setView(warnView);          toast.setGravity(Gravity.CENTER, 0 , 0 ); // 起點位置爲中間          toast.show();      }        // 開啓錄音計時線程      private void callRecordTimeThread() {          mRecordThread = new Thread(recordThread);          mRecordThread.start();      }        // 錄音Dialog圖片隨錄音音量大小切換      private void setDialogImage() {          if (voiceValue < 600.0 ) {              dialogImg.setImageResource(R.drawable.record_animate_01);          } else if (voiceValue > 600.0 && voiceValue < 1000.0 ) {              dialogImg.setImageResource(R.drawable.record_animate_02);          } else if (voiceValue > 1000.0 && voiceValue < 1200.0 ) {              dialogImg.setImageResource(R.drawable.record_animate_03);          } else if (voiceValue > 1200.0 && voiceValue < 1400.0 ) {              dialogImg.setImageResource(R.drawable.record_animate_04);          } else if (voiceValue > 1400.0 && voiceValue < 1600.0 ) {              dialogImg.setImageResource(R.drawable.record_animate_05);          } else if (voiceValue > 1600.0 && voiceValue < 1800.0 ) {              dialogImg.setImageResource(R.drawable.record_animate_06);          } else if (voiceValue > 1800.0 && voiceValue < 2000.0 ) {              dialogImg.setImageResource(R.drawable.record_animate_07);          } else if (voiceValue > 2000.0 && voiceValue < 3000.0 ) {              dialogImg.setImageResource(R.drawable.record_animate_08);          } else if (voiceValue > 3000.0 && voiceValue < 4000.0 ) {              dialogImg.setImageResource(R.drawable.record_animate_09);          } else if (voiceValue > 4000.0 && voiceValue < 6000.0 ) {              dialogImg.setImageResource(R.drawable.record_animate_10);          } else if (voiceValue > 6000.0 && voiceValue < 8000.0 ) {              dialogImg.setImageResource(R.drawable.record_animate_11);          } else if (voiceValue > 8000.0 && voiceValue < 10000.0 ) {              dialogImg.setImageResource(R.drawable.record_animate_12);          } else if (voiceValue > 10000.0 && voiceValue < 12000.0 ) {              dialogImg.setImageResource(R.drawable.record_animate_13);          } else if (voiceValue > 12000.0 ) {              dialogImg.setImageResource(R.drawable.record_animate_14);          }      }        // 錄音線程      private Runnable recordThread = new Runnable() {            @Override          public void run() {              recodeTime = 0 .0f;              while (recordState == RECORD_ON) {                  {                      try {                          Thread.sleep( 100 );                          recodeTime += 0.1 ;                          // 獲取音量，更新dialog                          if (!isCanceled) {                              voiceValue = mAudioRecorder.getAmplitude();                              recordHandler.sendEmptyMessage( 1 );                          }                      } catch (InterruptedException e) {                          e.printStackTrace();                      }                  }              }          }      };        @SuppressLint (HandlerLeak)      private Handler recordHandler = new Handler() {          @Override          public void handleMessage(Message msg) {              setDialogImage();          }      };        @Override      public boolean onTouchEvent(MotionEvent event) {          // TODO Auto-generated method stub          switch (event.getAction()) {          case MotionEvent.ACTION_DOWN: // 按下按鈕              if (recordState != RECORD_ON) {                  showVoiceDialog( 0 );                  downY = event.getY();                  if (mAudioRecorder != null ) {                      mAudioRecorder.ready();                      recordState = RECORD_ON;                      mAudioRecorder.start();                      callRecordTimeThread();                  }              }              break ;          case MotionEvent.ACTION_MOVE: // 滑動手指              float moveY = event.getY();              if (downY - moveY > 50 ) {                  isCanceled = true ;                  showVoiceDialog( 1 );              }              if (downY - moveY < 20 ) {                  isCanceled = false ;                  showVoiceDialog( 0 );              }              break ;          case MotionEvent.ACTION_UP: // 鬆開手指              if (recordState == RECORD_ON) {                  recordState = RECORD_OFF;                  if (mRecordDialog.isShowing()) {                      mRecordDialog.dismiss();                  }                  mAudioRecorder.stop();                  mRecordThread.interrupt();                  voiceValue = 0.0 ;                  if (isCanceled) {                      mAudioRecorder.deleteOldFile();                  } else {                      if (recodeTime < MIN_RECORD_TIME) {                          showWarnToast(時間過短  錄音失敗);                          mAudioRecorder.deleteOldFile();                      } else {                          if (listener != null ) {                              listener.recordEnd(mAudioRecorder.getFilePath());                          }                      }                  }                  isCanceled = false ;                  this .setText(按住 說話);              }              break ;          }          return true ;      }        public interface RecordListener {          public void recordEnd(String filePath);      } } </code>

Dialog佈局：

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<code class = "hljs" xml= "" ><!--?xml version= 1.0 encoding=utf- 8 ?--> <linearlayout android:background= "@drawable/record_bg" android:gravity= "center" android:layout_gravity= "center" android:layout_height= "wrap_content" android:layout_width= "wrap_content" android:orientation= "vertical" android:padding= "20dp" xmlns:android= "http://schemas.android.com/apk/res/android" >        <imageview android:id= "@+id/record_dialog_img" android:layout_height= "wrap_content" android:layout_width= "wrap_content" >        <textview android:id= "@+id/record_dialog_txt" android:layout_height= "wrap_content" android:layout_margintop= "5dp" android:layout_width= "wrap_content" android:textcolor= "@android:color/white" >   </textview></imageview></linearlayout></code>

錄音時間過短的Toast佈局：

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<code class = "hljs" xml= "" ><!--?xml version= 1.0 encoding=utf- 8 ?--> <linearlayout android:background= "@drawable/record_bg" android:gravity= "center" android:layout_height= "wrap_content" android:layout_width= "wrap_content" android:orientation= "vertical" android:padding= "20dp" xmlns:android= "http://schemas.android.com/apk/res/android" >        <imageview android:layout_height= "wrap_content" android:layout_width= "wrap_content" android:src= "@drawable/voice_to_short" >        <textview android:layout_height= "wrap_content" android:layout_width= "wrap_content" android:text= "時間過短" android:textcolor= "@android:color/white" android:textsize= "15sp" >   </textview></imageview></linearlayout></code>

自定義的Dialogstyle，對話框樣式

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<code applescript= "" class = "hljs" ><style name= "Dialogstyle" type= "text/css" ><item name=android:windowBackground> @android :color/transparent</item>          <item name=android:windowFrame> @null </item>          <item name=android:windowNoTitle> true </item>          <item name=android:windowIsFloating> true </item>          <item name=android:windowIsTranslucent> true </item>          <item name=android:windowAnimationStyle> @android :style/Animation.Dialog</item>          <!-- 顯示對話框時當前的屏幕是否變暗 -->          <item name=android:backgroundDimEnabled> false </item></style></code>

RecordStrategy 錄音策略接口

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<code class = "hljs" java= "" > package com.example.recordtest;   /**   * RecordStrategy 錄音策略接口   * @author acer   */ public interface RecordStrategy {        /**       * 在這裏進行錄音準備工做，重置錄音文件名等       */      public void ready();      /**       * 開始錄音       */      public void start();      /**       * 錄音結束       */      public void stop();        /**       * 錄音失敗時刪除原來的舊文件       */      public void deleteOldFile();        /**       * 獲取錄音音量的大小       * @return       */      public double getAmplitude();        /**       * 返回錄音文件完整路徑       * @return       */      public String getFilePath();   } </code>

我的寫的一個錄音實踐策略

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<code class = "hljs" java= "" > package com.example.recordtest;   import java.io.File; import java.io.IOException; import java.text.SimpleDateFormat; import java.util.Date;   import android.media.MediaRecorder; import android.os.Environment;   public class AudioRecorder implements RecordStrategy {        private MediaRecorder recorder;      private String fileName;      private String fileFolder = Environment.getExternalStorageDirectory()              .getPath() + /TestRecord;        private boolean isRecording = false ;        @Override      public void ready() {          // TODO Auto-generated method stub          File file = new File(fileFolder);          if (!file.exists()) {              file.mkdir();          }          fileName = getCurrentDate();          recorder = new MediaRecorder();          recorder.setOutputFile(fileFolder + / + fileName + .amr);          recorder.setAudioSource(MediaRecorder.AudioSource.MIC); // 設置MediaRecorder的音頻源爲麥克風          recorder.setOutputFormat(MediaRecorder.OutputFormat.RAW_AMR); // 設置MediaRecorder錄製的音頻格式          recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); // 設置MediaRecorder錄製音頻的編碼爲amr      }        // 以當前時間做爲文件名      private String getCurrentDate() {          SimpleDateFormat formatter = new SimpleDateFormat(yyyy_MM_dd_HHmmss);          Date curDate = new Date(System.currentTimeMillis()); // 獲取當前時間          String str = formatter.format(curDate);          return str;      }        @Override      public void start() {          // TODO Auto-generated method stub          if (!isRecording) {              try {                  recorder.prepare();                  recorder.start();              } catch (IllegalStateException e) {                  // TODO Auto-generated catch block                  e.printStackTrace();              } catch (IOException e) {                  // TODO Auto-generated catch block                  e.printStackTrace();              }                isRecording = true ;          }        }        @Override      public void stop() {          // TODO Auto-generated method stub          if (isRecording) {              recorder.stop();              recorder.release();              isRecording = false ;          }        }        @Override      public void deleteOldFile() {          // TODO Auto-generated method stub          File file = new File(fileFolder + / + fileName + .amr);          file.deleteOnExit();      }        @Override      public double getAmplitude() {          // TODO Auto-generated method stub          if (!isRecording) {              return 0 ;          }          return recorder.getMaxAmplitude();      }        @Override      public String getFilePath() {          // TODO Auto-generated method stub          return fileFolder + / + fileName + .amr;      }   } </code>

MainActivity

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<code class = "hljs" java= "" > package com.example.recordtest;   import android.os.Bundle; import android.app.Activity; import android.view.Menu;   public class MainActivity extends Activity {        RecordButton button;        @Override      protected void onCreate(Bundle savedInstanceState) {          super .onCreate(savedInstanceState);          setContentView(R.layout.activity_main);          button = (RecordButton) findViewById(R.id.btn_record);          button.setAudioRecord( new AudioRecorder());      }          @Override      public boolean onCreateOptionsMenu(Menu menu) {          // Inflate the menu; this adds items to the action bar if it is present.          getMenuInflater().inflate(R.menu.main, menu);          return true ;      }   } </code>