android錄影程式

2011-03-14 14:13:47

385384

各位好~小弟最近在寫android的錄影程式~由於是新手~很多邏輯沒有很懂~我是拿"現在"官方的錄音程式來做改成錄影.依照我收集到的資訊好像們甚麼差.但改完後進入一片黑的程式用menu觸發按鍵就會不預期關閉..不之哪了那些程式碼.

package com.android.audiorecordtest;

import android.app.Activity;
import android.os.Bundle;
import android.os.Environment;
import android.widget.Button;
import android.view.Menu;
import android.view.MenuItem;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.content.Context;
import android.util.Log;
import android.media.MediaRecorder;
import android.media.MediaPlayer;
import java.io.IOException;

public class video33 extends Activity {
    /** Called when the activity is first created. */

        private static final String LOG_TAG = "AudioRecordTest";
        private static String mFileName = null;
        private MediaRecorder mRecorder = null;
        private MediaPlayer   mPlayer = null;


private void onRecord(boolean start){
            if (start) {
                startRecording();
                } else {
                    stopRecording();
                    }
            }

    private void onPlay(boolean start) {
        if (start) {
            startPlaying();
            } else {
                stopPlaying();
                }
        }
    private void startPlaying() {
        mPlayer = new MediaPlayer();
        try {
            mPlayer.setDataSource(mFileName);
            mPlayer.prepare();
            mPlayer.start();
            } catch (IOException e) {
                Log.e(LOG_TAG, "prepare() failed");
                }
            }
    private void stopPlaying() {
        mPlayer.release();
        mPlayer = null;
        }


private void startRecording() {
    mRecorder = new MediaRecorder();
    SurfaceView surface = (SurfaceView)findViewById(R.id.SurfaceView01);
    SurfaceHolder holder = surface.getHolder();
    mRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
    mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
    mRecorder.setVideoSize(176, 144); // QCIF
    mRecorder.setVideoFrameRate(15);
    mRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H263);
    mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
    mRecorder.setOutputFile(mFileName);
    mRecorder.setPreviewDisplay(holder.getSurface());

    try {
        mRecorder.prepare();
        } catch (IOException e) {
            Log.e(LOG_TAG, "prepare() failed");
            }
    mRecorder.start();

}
private void stopRecording() {
    mRecorder.stop();
    mRecorder.release();
    mRecorder = null;
    }

public void AudioRecordTest() {
    mFileName = Environment.getExternalStorageDirectory().getAbsolutePath();

    mFileName += "/audiorecordtest.3gp";
    }    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);


        setContentView(R.layout.main);
    }
        protected static final int Menu_play = Menu.FIRST;
        protected static final int Menu_record = Menu.FIRST+1;

        @Override
        public boolean onCreateOptionsMenu(Menu menu) {
            // TODO Auto-generated method stub

            menu.add(0,Menu_play,0,"播放");
            menu.add(0,Menu_record,0,"錄影");

            return super.onCreateOptionsMenu(menu);

        }

        @Override
        public boolean onOptionsItemSelected(MenuItem item) {
            // TODO Auto-generated method stub
            switch(item.getItemId()){
            case Menu_play:
                big();
             break;
            case Menu_record:
                litter();
                break;

            }
            return super.onOptionsItemSelected(item);
        }
        public void big(){
            Button button = (Button)findViewById(R.id.playone);
            boolean mStartPlaying = true;
            onPlay(mStartPlaying);
                  if (mStartPlaying) {
                   button.setText("Stop playing");
                      } else {
                   button.setText("Start playing");
                          }
                  mStartPlaying = !mStartPlaying;
        }
        public void litter(){
            Button buttonI = (Button)findViewById(R.id.playtwo);
            boolean mStartrecording = true;
            onRecord(mStartrecording);
                  if (mStartrecording) {
                   buttonI.setText("Stop recording");
                  } else {
               buttonI.setText("Start recording");
                      }
               mStartrecording = !mStartrecording;
        }

    @Override
    public void onPause() {
        super.onPause();
        if (mRecorder != null) {
            mRecorder.release();
            mRecorder = null;
            }
        if (mPlayer != null) {
            mPlayer.release();
            mPlayer = null;
            }
        }
    }