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| package com.example.main;
import java.io.File;
import java.io.IOException;
import android.hardware.Camera;
import android.media.MediaRecorder;
import android.media.MediaRecorder.OnErrorListener;
import android.media.MediaRecorder.OnInfoListener;
import android.os.Bundle;
import android.os.Environment;
import android.app.Activity;
import android.content.Intent;
import android.util.Log;
import android.view.Menu;
import android.view.SurfaceHolder;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.MediaController;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.VideoView;
public class Main extends Activity implements SurfaceHolder.Callback,OnInfoListener,OnErrorListener{
private Button initBtn=null;
private Button startBtn=null;
private Button stopBtn=null;
private Button playBtn=null;
private Button stopPlayBtn=null;
private TextView recordingmsg=null;
private VideoView videoView=null;
private SurfaceHolder holder=null;
private Camera camera=null;
private static final String Tag="RecordVideo";
private MediaRecorder recorder=null;
private String outputFileName;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//get references to UI elements
initBtn=(Button)findViewById(R.id.init);
startBtn=(Button)findViewById(R.id.start);
stopBtn=(Button)findViewById(R.id.stop);
playBtn=(Button)findViewById(R.id.review);
stopPlayBtn=(Button)findViewById(R.id.stopreview);
recordingmsg=(TextView)findViewById(R.id.recording);
videoView=(VideoView)this.findViewById(R.id.videoview);
}
public void buttonTapped(View view)
{
switch(view.getId()){
case R.id.init:
initRecorder();
break;
case R.id.start:
BeginRecording();
break;
case R.id.stop:
stopRecording();
break;
case R.id.review:
playRecording();
break;
case R.id.stopreview:
StopPlayBack();
break;
}
}
private void StopPlayBack(){
videoView.stopPlayback();
}
private void playRecording() {
MediaController mc=new MediaController(this);
videoView.setMediaController(mc);
videoView.setVideoPath(outputFileName);
videoView.start();
stopPlayBtn.setEnabled(true);
}
private void stopRecording() {
if (recorder!=null){
//recorder.setOnErrorListener(null);
//recorder.setOnInfoListener(null);
try {
recorder.stop();
}
catch(IllegalStateException e){
Log.e(Tag, "Got illegalStateException in stop recording" );
}
//releaseRecorder();
recordingmsg.setText("");
//releaseCamera();
startBtn.setEnabled(false);
stopBtn.setEnabled(false);
playBtn.setEnabled(true);
}
}
private void releaseCamera() {
if (camera!=null)
try{
camera.reconnect();
}catch(IOException e){
e.printStackTrace();
}
camera.release();
camera=null;
}
private void releaseRecorder() {
if(recorder!=null){
try{
camera.reconnect();
}catch(IOException e){
e.printStackTrace();
}
camera.release();
camera=null;
}
}
private void BeginRecording() {
recorder.setOnInfoListener(this);
recorder.setOnErrorListener(this);
recorder.start();
recordingmsg.setText("recording");
Toast.makeText(getApplicationContext(),"Begin Recording", Toast.LENGTH_LONG).show();
startBtn.setEnabled(false);
stopBtn.setEnabled(true);
}
public void initRecorder(){
if(recorder!=null)return;
outputFileName=Environment.getExternalStorageDirectory()+"/vidéooutput.mp4";
File outFile=new File(outputFileName);
if(outFile.exists())outFile.delete();
try{
camera.stopPreview();
camera.unlock();
recorder =new MediaRecorder();
recorder.setCamera(camera);
recorder.setAudioSource(MediaRecorder.AudioSource.CAMCORDER);
recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
recorder.setVideoSize(176, 144);
recorder.setVideoFrameRate(15);
recorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setMaxDuration(7000);//limit to 7 second
recorder.setPreviewDisplay(holder.getSurface());
recorder.setOutputFile(outputFileName);
//recorder.prepare();
Log.v(Tag, "Media recorder initialised");
initBtn.setEnabled(false);
startBtn.setEnabled(true);
}
catch(Exception e) {
Log.v(Tag, "Media recorder failed to initialise");
e.printStackTrace();
}
}
@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;
}
@Override
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
// TODO Auto-generated method stub
}
@Override
public void surfaceCreated(SurfaceHolder arg0) {
Log.v(Tag, "in surface created");
try{
camera.setPreviewDisplay(holder);
camera.startPreview();
} catch(IOException e){
Log.v(Tag, "Could not start the preview");
e.printStackTrace();
}
initBtn.setEnabled(true);
}
@Override
public void surfaceDestroyed(SurfaceHolder arg0) {
// TODO Auto-generated method stub
}
@Override
public void onInfo(MediaRecorder mr, int what, int extra) {
Log.i(Tag, "got a recording event");
if (what==MediaRecorder.MEDIA_RECORDER_INFO_MAX_DURATION_REACHED)
{
Log.i(Tag, "...max duration reached");
stopRecording();
Toast.makeText(this, "Recording limit has not reached Stopping the recording", Toast.LENGTH_SHORT).show();
}
}
@Override
public void onError(MediaRecorder mr, int what, int extra) {
Log.e(Tag, "got a reacording error");
stopRecording();
Toast.makeText(this, "Recording error has occured Stopping the recording", Toast.LENGTH_SHORT).show();
}
@Override
protected void onResume() {
Log.v(Tag,"onResume");
super.onResume();
initBtn.setEnabled(false);
startBtn.setEnabled(false);
stopBtn.setEnabled(false);
playBtn.setEnabled(false);
stopPlayBtn.setEnabled(false);
if(!initCamera())
finish();
}
private boolean initCamera() {
try{
camera=Camera.open();
Camera.Parameters camParams=camera.getParameters();
camera.lock();
holder=videoView.getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
catch(RuntimeException re){
Log.v(Tag, "could not initialise the camera");
re.printStackTrace();
return false;
}
return true;
}
} |
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