Android錄製視頻(三)

mainActivity如下:

package c.c;import java.io.File;import java.io.IOException;import android.app.Activity;import android.content.pm.ActivityInfo;import android.media.MediaRecorder;import android.os.Bundle;import android.os.Environment;import android.view.SurfaceHolder;import android.view.SurfaceView;import android.view.View;import android.view.View.OnClickListener;import android.view.Window;import android.view.WindowManager;import android.widget.Button;/** * Demo描述: * 利用SurfaceView拍攝視頻 *  * 注意: * 1 嚴重注意:MediaRecorder參數的設定.因手機不同而有差異 * 2 在設定MediaRecorder的參數時,應先設定: *   setVideoSource(),setAudioSource(),setOutputFormat(),setVideoEncoder(),setAudioEncoder *   然後再設定其餘的參數,查看方法對應的API有提示 * */public class MainActivity extends Activity implements SurfaceHolder.Callback{private Button mStartButton;private Button mStopButton;private SurfaceView mSurfaceView;private SurfaceHolder mSurfaceHolder;private MediaRecorder mMediaRecorder;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        // 去掉標題列        requestWindowFeature(Window.FEATURE_NO_TITLE);        // 設定全屏getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);// 設定橫屏顯示setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);        setContentView(R.layout.main);        init();    }    private void init(){    mStartButton=(Button) findViewById(R.id.start_button);    mStartButton.setOnClickListener(new ButtonClickListenerImpl());    mStopButton=(Button) findViewById(R.id.stop_button);    mStopButton.setOnClickListener(new ButtonClickListenerImpl());    mSurfaceView=(SurfaceView) findViewById(R.id.surfaceView);    mSurfaceHolder=mSurfaceView.getHolder();    mSurfaceHolder.addCallback(this);    mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);    }    private void initMediaRecorder(){    mMediaRecorder=new MediaRecorder();    //設定視頻源    mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);    //設定音頻源    mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);    //設定檔案輸出格式    mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);    //設定視頻編碼方式    mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);    //設定音頻編碼方式    mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);    //設定視頻高和寬,注意文檔的說明:    //Must be called after setVideoSource().    //Call this after setOutFormat() but before prepare().    //設定錄製的視訊框架率,注意文檔的說明:    //Must be called after setVideoSource().    //Call this after setOutFormat() but before prepare().    mMediaRecorder.setVideoFrameRate(20);    //設定預覽畫面    mMediaRecorder.setPreviewDisplay(mSurfaceHolder.getSurface());    //設定輸出路徑    mMediaRecorder.setOutputFile    (Environment.getExternalStorageDirectory()+File.separator+System.currentTimeMillis()+".mp4");        }        private class ButtonClickListenerImpl implements OnClickListener{public void onClick(View v) {if (v.getId()==R.id.start_button) {try {initMediaRecorder();mMediaRecorder.prepare();mMediaRecorder.start();} catch (IllegalStateException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}} if (v.getId()==R.id.stop_button) {if (mMediaRecorder!=null) {mMediaRecorder.stop();mMediaRecorder.release();mMediaRecorder=null;}}}    }    //SurfaceHolder.Callback介面public void surfaceCreated(SurfaceHolder holder) {}public void surfaceChanged(SurfaceHolder holder, int format, int width,int height) {}public void surfaceDestroyed(SurfaceHolder holder) {}        }

main.xml如下:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <SurfaceView        android:id="@+id/surfaceView"        android:layout_width="fill_parent"        android:layout_height="0dip"        android:layout_weight="1" />    <LinearLayout        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:orientation="horizontal" >        <Button            android:id="@+id/start_button"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:text="開始"            android:layout_weight="1" />        <Button            android:id="@+id/stop_button"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:text="停止"            android:layout_weight="1" />    </LinearLayout></LinearLayout>