[多媒体]android MediaRecoder 实现录像机

http://www.cnblogs.com/skyseraph/archive/2012/03/09/2387417.html

啰嗦：前一篇介绍了MediaRecoder实现的录音机：【Android學習專題】多媒體篇：MediaRecorder 实现录音机，这篇介绍录像机的实现。

录像界面

关键步骤

开始录像

录像结束

屏幕下方计时实现

完整源码

JAVA源码

  1 public class mediarecorder2 extends Activity implements SurfaceHolder.Callback  2 {  3     private Button mVideoStartBtn,mVideoStopBtn,mVideoReturnBtn;  4     private SurfaceView mSurfaceview;         // 显示视频的控件  5     private MediaRecorder mMediaRecorder;     // MediaRecorder对象，錄製視頻的類  6     private SurfaceHolder mSurfaceHolder;    //   7     private File mRecVedioPath;                // 录制的音視頻文件路徑  8     private File mRecAudioFile;                // 录制的音視頻文件  9     private TextView tv01,tv02,tv03,tv04,tv05; 10     private int hour = 0; 11     private int minute = 0; 12     private int second = 0; 13     private boolean bool; 14      15     @Override 16     protected void onCreate(Bundle savedInstanceState) 17     { 18         super.onCreate(savedInstanceState); 19         /* 全局Activity设置 */ 20         // 隐去Title（程序的名字） 21         this.requestWindowFeature(Window.FEATURE_NO_TITLE); 22         // 設置全屏：隐去电池等图标和一切修饰部分（状态栏部分） 23         this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 24                 WindowManager.LayoutParams.FLAG_FULLSCREEN); 25         // 选择支持半透明模式,在有surfaceview的activity中使用。         26         getWindow().setFormat(PixelFormat.TRANSLUCENT); 27         setContentView(R.layout.mymultimedia_mediarecorder2); 28  29         tv01 = (TextView) findViewById(R.id.mediarecorder2_TextView01); 30         tv02 = (TextView) findViewById(R.id.mediarecorder2_TextView02); 31         tv03 = (TextView) findViewById(R.id.mediarecorder2_TextView03); 32         tv04 = (TextView) findViewById(R.id.mediarecorder2_TextView04); 33         tv05 = (TextView) findViewById(R.id.mediarecorder2_TextView05);         34         mVideoStartBtn = (Button) findViewById(R.id.mediarecorder2_VideoStartBtn); 35         mVideoStopBtn = (Button) findViewById(R.id.mediarecorder2_VideoStopBtn); 36         mVideoReturnBtn = (Button) findViewById(R.id.mediarecorder2_VideoReturnBtn); 37         mSurfaceview = (SurfaceView) this.findViewById(R.id.mediarecorder2_Surfaceview); 38          39         //设置TextView不可见 40         tv01.setVisibility(View.GONE); 41         tv02.setVisibility(View.GONE); 42         tv03.setVisibility(View.GONE); 43         tv04.setVisibility(View.GONE); 44         tv05.setVisibility(View.GONE); 45          46         /* 检测是否存在SD卡 */ 47         if (Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED)) 48         { 49             mRecVedioPath = Environment.getExternalStorageDirectory();// 得到SD卡得路径             50         } else 51         { 52             Toast.makeText(mediarecorder2.this, "没有SD卡", Toast.LENGTH_LONG).show(); 53         }         54  55         // 56         SurfaceHolder holder = mSurfaceview.getHolder();        // 取得holder 57         holder.addCallback(mediarecorder2.this);                 // holder加入回调接口 58         holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);// 設置顯示器類型，setType必须设置 59  60 // 按钮状态 61         mVideoStartBtn.setEnabled(true); 62         mVideoStopBtn.setEnabled(false); 63  64         // 開始 65         mVideoStartBtn.setOnClickListener(new Button.OnClickListener() 66         { 67             @Override 68             public void onClick(View v) 69             { 70                 bool = true; 71                 /* ①Initial：实例化MediaRecorder对象 */ 72                 if(mMediaRecorder == null) 73                     mMediaRecorder = new MediaRecorder(); 74                 else 75                     mMediaRecorder.reset(); 76                 /* 解決豎屏視頻被旋轉90°的錯誤  77                 Camera c = Camera.open(); 78                 Camera.Parameters parameters = c.getParameters(); 79                 parameters.setRotation(90); 80                 c.setParameters(parameters);  81                 c.unlock();         82                 mMediaRecorder.setCamera(c);*/ 83                 // 預覽 84                 mMediaRecorder.setPreviewDisplay(mSurfaceHolder.getSurface()); 85                 /* ②setAudioSource/setVedioSource */ 86                 mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);// 设置Camera(相机) 87                 mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); 88                 /* ②设置錄製視頻输出格式：THREE_GPP/MPEG-4/RAW_AMR/Default 89                  * THREE_GPP(3gp格式，H263视频ARM音频编码)、MPEG-4、RAW_AMR(只支持音频且音频编码要求为AMR_NB)*/ 90                 mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); 91                 /* ②设置視頻/音频文件的编码：AAC/AMR_NB/AMR_MB/Default */ 92                 mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264); 93                 mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); 94                 /* ②设置视频录制的分辨率。必须放在设置编码和格式的后面，否则报错 */ 95                 mMediaRecorder.setVideoSize(176, 144); 96                 /* ②设置录制的视频帧率。必须放在设置编码和格式的后面，否则报错 */ 97                 mMediaRecorder.setVideoFrameRate(15);                 98                 /* ②设置输出文件的路径 */                 99                 try100                 {101                     mRecAudioFile = File.createTempFile("Vedio",".3gp",mRecVedioPath);102                 } catch (IOException e1)103                 {104                     // TODO Auto-generated catch block105                     e1.printStackTrace();106                 }107                 mMediaRecorder.setOutputFile(mRecAudioFile.getAbsolutePath());108                 try109                 {     110                     /* ③准备 */111                     mMediaRecorder.prepare();112                     tv01.setVisibility(View.VISIBLE);113                     tv02.setVisibility(View.VISIBLE);114                     tv03.setVisibility(View.VISIBLE);115                     tv04.setVisibility(View.VISIBLE);116                     tv05.setVisibility(View.VISIBLE);117                     handler.postDelayed(task, 1000);118                     /* ④开始 */119                     mMediaRecorder.start();120                     /* 按钮状态 */121                     mVideoStartBtn.setEnabled(false);122                     mVideoStopBtn.setEnabled(true);123                     mVideoReturnBtn.setEnabled(true);124                 } catch (Exception e)125                 {126                     e.printStackTrace();127                 }128             }129         });130         // 結束131         mVideoStopBtn.setOnClickListener(new Button.OnClickListener()132         {133             @Override134             public void onClick(View v)135             {                136                 if (mMediaRecorder != null)137                 {138                     /* ⑤停止录音 */139                     mMediaRecorder.stop();140                     bool = false;141                     tv01.setText(format(hour));142                     tv03.setText(format(minute));143                     tv05.setText(format(second));144                     /* ⑥释放MediaRecorder */145                     mMediaRecorder.release();146                     mMediaRecorder = null;147                     /* 按钮状态 */148                     mVideoStartBtn.setEnabled(true);149                     mVideoStopBtn.setEnabled(false);150                     mVideoReturnBtn.setEnabled(true);151                 }152             }153         });154         //  返回155         mVideoReturnBtn.setOnClickListener(new Button.OnClickListener()156         {157             @Override158             public void onClick(View v)159             {160                 if(mMediaRecorder != null)161                 {162                     mMediaRecorder.stop();163                     mMediaRecorder.release();164                     mMediaRecorder = null;165                 }166                 finish();167             }168         });169     }170 171     @Override172     public void surfaceCreated(SurfaceHolder holder)173     {174         // TODO Auto-generated method stub175         mSurfaceHolder = holder;176     }177 178     @Override179     public void surfaceChanged(SurfaceHolder holder, int format, int width, int height)180     {181         // TODO Auto-generated method stub182         mSurfaceHolder = holder;183     }184 185     @Override186     public void surfaceDestroyed(SurfaceHolder holder)187     {188         // TODO Auto-generated method stub189         mSurfaceview = null;190         mSurfaceHolder = null;191         mMediaRecorder = null;192     }193     194     195     /*定时器设置，实现计时*/    196     private Handler handler = new Handler();197     private Runnable task = new Runnable()198     {199         public void run()200         {201             if (bool)202             {203                 handler.postDelayed(this, 1000);204                 second++;205                 if (second < 60)206                 {207                     tv05.setText(format(second));208                 } else if (second < 3600)209                 {210                     minute = second / 60;211                     second = second % 60;212                     tv03.setText(format(minute));213                     tv05.setText(format(second));214                 } else215                 {216                     hour = second / 3600;217                     minute = (second % 3600) / 60;218                     second = (second % 3600) % 60;219                     tv01.setText(format(hour));220                     tv03.setText(format(minute));221                     tv05.setText(format(second));222                 }223             }224         }225     };226     227     /* 格式化时间*/    228     public String format(int i)229     {230         String s = i + "";231         if (s.length() == 1)232         {233             s = "0" + s;234         }235         return s;236     }237 }

XML布局文件

  1 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  2     android:layout_width="fill_parent"  3     android:layout_height="fill_parent"  4     android:orientation="vertical" >  5   6     <LinearLayout  7 android:layout_width="fill_parent"  8         android:layout_height="fill_parent"  9         android:layout_weight="1" > 10  11         <SurfaceView 12 android:id="@+id/mediarecorder2_Surfaceview" 13             android:layout_width="fill_parent" 14             android:layout_height="fill_parent" /> 15     </LinearLayout> 16  17     <LinearLayout 18 android:layout_width="fill_parent" 19         android:layout_height="fill_parent" 20         android:layout_weight="5" 21         android:gravity="center" 22         android:orientation="vertical" > 23  24         <AbsoluteLayout 25 android:layout_width="fill_parent" 26             android:layout_height="fill_parent" 27             android:layout_weight="2" > 28  29             <TextView 30 android:id="@+id/mediarecorder2_TextView01" 31                 android:layout_width="40px" 32                 android:layout_height="40px" 33                 android:layout_x="5px" 34                 android:layout_y="1px" 35                 android:text="00" 36                 android:textColor="#ffff0000" 37                 android:textStyle="bold" > 38             </TextView> 39              40             <TextView 41 android:id="@+id/mediarecorder2_TextView02" 42                 android:layout_width="20px" 43                 android:layout_height="40px" 44                 android:layout_x="25px" 45                 android:layout_y="1px" 46                 android:text=":" 47                 android:textColor="#ffff0000" 48                 android:textStyle="bold" > 49             </TextView> 50              51             <TextView 52 android:id="@+id/mediarecorder2_TextView03" 53                 android:layout_width="40px" 54                 android:layout_height="40px" 55                 android:layout_x="35px" 56                 android:layout_y="1px" 57                 android:text="00" 58                 android:textColor="#ffff0000" 59                 android:textStyle="bold" > 60             </TextView> 61              62             <TextView 63 android:id="@+id/mediarecorder2_TextView04" 64                 android:layout_width="20px" 65                 android:layout_height="40px" 66                 android:layout_x="55px" 67                 android:layout_y="1px" 68                 android:text=":" 69                 android:textColor="#ffff0000" 70                 android:textStyle="bold" > 71             </TextView> 72              73             <TextView 74 android:id="@+id/mediarecorder2_TextView05" 75                 android:layout_width="40px" 76                 android:layout_height="40px"                 77                 android:layout_x="65px" 78                 android:layout_y="1px" 79                 android:text="00" 80                 android:textColor="#ffff0000" 81                 android:textStyle="bold" > 82             </TextView> 83              84             <TextView 85 android:layout_width="wrap_content" 86                 android:layout_height="wrap_content" 87                 android:layout_x="350dp" 88                 android:layout_y="1dp" 89                 android:text="SkySeraph" 90                 android:textColor="#ffff00" 91                 android:textStyle="bold" > 92             </TextView> 93             94         </AbsoluteLayout> 95  96         <LinearLayout 97 android:layout_width="fill_parent" 98             android:layout_height="fill_parent" 99             android:layout_weight="1"100             android:gravity="center"101             android:orientation="horizontal" >102 103             <Button104 android:id="@+id/mediarecorder2_VideoStartBtn"105                 android:layout_width="fill_parent"106                 android:layout_height="fill_parent"107                 android:layout_weight="1"108                 android:background="@layout/button1"109                 android:text="Start" />110 111             <Button112 android:id="@+id/mediarecorder2_VideoStopBtn"113                 android:layout_width="fill_parent"114                 android:layout_height="fill_parent"115                 android:layout_weight="1"116                 android:background="@layout/button1"117                 android:text="Stop" />118             119             <Button120 android:id="@+id/mediarecorder2_VideoReturnBtn"121                 android:layout_width="fill_parent"122                 android:layout_height="fill_parent"123                 android:layout_weight="1"124                 android:background="@layout/button2"125                 android:text="Return" />126         </LinearLayout>127     </LinearLayout>128 129 </LinearLayout>

Refs

1 http://developer.android.com/reference/android/media/MediaRecorder.html

2 http://blog.csdn.net/iamlazybone/article/details/5764118

3 http://blog.sina.com.cn/s/blog_6111ce890100pouu.html

4 http://blog.csdn.net/peijiangping1989/article/details/7049991

5 http://www.codeproject.com/Articles/107270/Recording-and-Playing-Video-on-Android

作者：skyseraph
出处：http://www.cnblogs.com/skyseraph/
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