私はビデオレコーダーを作成していますが、ユーザーがビデオを録画した時間の長さを知りたいです。時間は上向きにカウントされます。
時間を計算するために、スレッドを使用し、ユーザーが開始ボタンをクリックすると計算が開始され、ユーザーが停止ボタンをクリックすると停止します。
タイマー スレッドについては、こちらのチュートリアルを参照してください。ただし、ここでの私の問題は、タイマーが機能していないことであり、スレッドが機能していないと思います。以下は私のlogcatです。
メインアクティビティのコードは次のとおりです
public class Videotest1Activity extends Activity implements
SurfaceHolder.Callback, OnInfoListener, OnErrorListener{
Camera camera;
VideoView videoView;
SurfaceHolder holder;
TextView msg;
Button initBtn, startBtn, stopBtn, playBtn, stprevBtn;
MediaRecorder recorder;
String outputFileName;
static final String TAG = "RecordVideo";
int maxDuration = 7000;//7sec
int frameRate = 1;//15
String serverIP = "172.19.117.12";
int serverPort = 2000;
Socket socket;
int mCount;
TimerThread mTimer;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_videotest1);
videoView = (VideoView) findViewById(R.id.videoView1);
initBtn = (Button) findViewById(R.id.initialize);
startBtn = (Button) findViewById(R.id.button1);
stopBtn = (Button) findViewById(R.id.button3);
msg = (TextView) findViewById(R.id.textView1);
playBtn = (Button) findViewById(R.id.reviewBtn);
stprevBtn = (Button) findViewById(R.id.stprevBtn);
mTimer= new TimerThread();
mTimer.setOnAlarmListener(mSTimer_OnAlarm);
mTimer.setPeriod(100);
}
public void buttonTapped(View view){
switch(view.getId()){
case R.id.initialize:
initRecorder();
break;
case R.id.button1:
beginRecording();
break;
case R.id.button3:
stopRecording();
break;
case R.id.reviewBtn:
playRecording();
break;
case R.id.stprevBtn:
stopPlayback();
break;
}
}
@Override
public void onError(MediaRecorder mr, int what, int extra) {
Log.e(TAG, "Record error");
stopRecording();
Toast.makeText(this, "Recording limit reached", 2500).show();
}
@Override
public void onInfo(MediaRecorder mr, int what, int extra) {
Log.i(TAG, "recording event");
if(what == MediaRecorder.MEDIA_RECORDER_INFO_MAX_DURATION_REACHED){
Log.i(TAG, "...max duration reached");
stopRecording();
Toast.makeText(this, "Recording limit info", 2500).show();
}
}
@Override
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {
}
@Override
public void surfaceCreated(SurfaceHolder arg0) {
Log.v(TAG, "in surfaceCreated");
try{
camera.setPreviewDisplay(holder);
camera.startPreview();
}catch(IOException e){
Log.v(TAG, "Could not start the preview");
e.printStackTrace();
}
initBtn.setEnabled(true);
startBtn.setEnabled(true);
stopBtn.setEnabled(true);
}
@Override
public void surfaceDestroyed(SurfaceHolder arg0) {
}
protected void onResume(){
Log.v(TAG, "in onResume");
super.onResume();
initBtn.setEnabled(false);
startBtn.setEnabled(false);
stopBtn.setEnabled(false);
playBtn.setEnabled(false);
stprevBtn.setEnabled(false);
if(!initCamera())
finish();
}
public boolean initCamera(){
try{
camera = Camera.open();
Camera.Parameters camParam = camera.getParameters();
camera.lock();
holder = videoView.getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
//Thread thread = new Thread(new hantarThread());
//thread.start();
}catch(RuntimeException re){
Log.v(TAG, "Could not initialize the camera");
re.printStackTrace();
return false;
}
return true;
}
public void initRecorder(){
if(recorder == null){
Toast.makeText(this, "record null", 2500).show();
}
else{
Toast.makeText(this, "record have", 2500).show();
}
outputFileName = Environment.getExternalStorageDirectory() + "/videooutput.mp4";
File outputFile = new File(outputFileName);
if(outputFile.exists())
outputFile.delete();//knp nk dlt?
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(frameRate);//15
recorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setMaxDuration(maxDuration);
recorder.setPreviewDisplay(holder.getSurface());
recorder.setOutputFile(outputFileName);
recorder.prepare();
Log.v(TAG, "MediaRecorder initialized");
initBtn.setEnabled(false);
startBtn.setEnabled(true);
}catch(Exception e){
Log.v(TAG, "MediaRecorder failed");
e.printStackTrace();
}
}
public void beginRecording(){
mCount = 0;
mTimer.start();
recorder.setOnInfoListener(this);
recorder.setOnErrorListener(this);
recorder.start();
msg.setText("Recording");
startBtn.setEnabled(false);
stopBtn.setEnabled(true);
}
public void stopRecording(){
if(recorder != null){
recorder.setOnErrorListener(null);
recorder.setOnInfoListener(null);
try{
recorder.stop();
mTimer.stop();
}catch(IllegalStateException e){
Log.e(TAG, "Got Illegal");
}
releaseRecorder();
msg.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){
recorder.release();
recorder = null;
}
}
private void playRecording(){
MediaController mc = new MediaController(this);
videoView.setMediaController(mc);
videoView.setVideoPath(outputFileName);
videoView.start();
stprevBtn.setEnabled(true);
}
private void stopPlayback(){
videoView.stopPlayback();
}
//----time thread---
OnAlarmListener mSTimer_OnAlarm= new OnAlarmListener() {
@Override
public void OnAlarm(TimerThread source) {
mCount++;
msg.setText("Count="+mCount);
if( mCount==100) source.stop();
}
};
//----end time thread---
これがTimerThread.javaの私のコードです
package com.example.videotest1;
import android.os.Handler;
/**
* A class that implements a simple timer.
* The timer does not create a separate thread, so there are no multi-threading issues in your activity.
* The timer uses an event listener as callback when it expires ("alarm") .
* @author Maarten Pennings 2011 September 26
*/
public class TimerThread {
// The minimal value for the period of a timer (in milliseconds).
public static final int MinPeriod = 10;
// Interface definition for a callback to be invoked when a timer expires ("alarm").
public interface OnAlarmListener {
/**
* Callback that timer 'source' has expired ("alarm").
* @param source Timer that expired (when multiple timers use same listener)
*/
void OnAlarm( TimerThread source );
}
protected int mPeriod= 100; // what is the period of the timer (in milliseconds)
protected boolean mEnabled= false; // is the timer enabled?
protected OnAlarmListener mOnAlarmListener= null; // the listener (callback) for the alarm events
protected Handler mHandler= new Handler(); // handler to the thread's queue, allows us to send (timed) messages to that queue
protected Runnable mMessage= new Runnable() { // The message being posted on the message queue
@Override public void run()
{
// Call the listener (when it is set).
if( mOnAlarmListener!=null ) mOnAlarmListener.OnAlarm(TimerThread.this);
// Cascade, i.e. post a new delayed message to ourselves.
// NOTE: The listener could have called stop(), this removes the mMessage message form the queue.
// However, there is no such message, it has just
been taken out of the queue and is currently being executed.
// So check if the timer is still enabled before cascading (posting a new delayed message).
if( mEnabled ) mHandler.postDelayed(mMessage, mPeriod);
}
};
/**
* Set the period of the timer. The timer must be separately enabled before its starts generating alarm events.
* @param ms the period of the timer in milliseconds
*/
public void setPeriod( int ms ) {
if( ms<MinPeriod ) throw new IllegalArgumentException("STimer.setPeriod called with too small period ("+ms+"<"+MinPeriod+")" );
mPeriod= ms;
}
/**
* Returns the current period of the timer.
* @return the current period of the timer in milliseconds
*/
public int getPeriod( ) {
return mPeriod;
}
/**
* Enables or disables the timer for generating an alarm event every getPeriod milliseconds.
* @param enabled the new state of the timer
*/
public void setEnabled( boolean enabled ) {
if( enabled!=mEnabled ) {
// The enabled state really changes
if( enabled ) {
// Post the first message (which will post the next message and so on)
mHandler.postDelayed(mMessage, mPeriod);
} else {
// Remove any message that is in the queue
mHandler.removeCallbacks(mMessage);
}
// Record the new state
mEnabled= enabled;
}
}
/**
* Returns the current enabled/disabled state of the timer.
* @return the current enabled/disabled state of the timer
*/
public boolean getEnabled() {
return mEnabled;
}
/**
* Register a callback to be invoked each time the timer period expires ("alarm").
* @param l the listener object that will be called-back.
*/
public void setOnAlarmListener( OnAlarmListener l ) {
mOnAlarmListener= l;
}
// Starts the timer, i.e. a shorthand for setEnabled(true).
public void start( ) {
setEnabled(true);
}
// Stops the timer, i.e. a shorthand for setEnabled(false).
public void stop( ) {
setEnabled(false);
}
}
そして最後は私のOnAlarmListener.javaです
public class OnAlarmListener implements TimerThread.OnAlarmListener {
public void OnAlarm(TimerThread source) {
// TODO Auto-generated method stub
}