hi:all ,i'm seeing same issue .can you help me ?
2009/9/8 preetam_pict <preetam.pa...@gmail.com>
>
> Hi all
>
> I am trying to write a sample program to record the video (say
> camcorder application).
> When i run my program using the emulator (I have android-sdk-
> windows-1.5_r3) I see java.io.IOException: prepare failed. error in
> logcat output.
>
> Further I can see that I have came across this error when i call
> MediaRecorder.prepare()
> from CamcorderActivity.surfaceCreated()
> But I am surprised to see that activity got launched and I am seeing
> the camera preview! Again the preview is seen only in half of the
> screen! Its weird!!!
>
> Further when i do recorder.start() to record the video I get
> java.lang.IllegalStateException. Yes this is obvious since the prepare
> () has failed.
> But the question is why prepare() has failed ?
>
> Can someone please help me to understand whats happening here!
> Am i missing something ???
>
> thanks in advance
> ~pp
>
> Here is my code ...
> package com.example;
>
> import java.io.IOException;
>
> import android.app.Activity;
> import android.graphics.PixelFormat;
> import android.media.MediaRecorder;
> import android.os.Bundle;
> import android.util.Log;
> import android.view.KeyEvent;
> import android.view.SurfaceHolder;
> import android.view.SurfaceView;
>
> public class CamcorderActivity extends Activity implements
> SurfaceHolder.Callback
> {
> private MediaRecorder recorder;
> private SurfaceView surfaceView;
> private SurfaceHolder surfaceHolder;
>
> private boolean recording = false;
>
> /** Called when the activity is first created. */
> @Override
> public void onCreate(Bundle savedInstanceState)
> {
> super.onCreate(savedInstanceState);
>
> // configure the surface
> getWindow().setFormat(PixelFormat.TRANSLUCENT);
> setContentView(R.layout.main);
> surfaceView = (SurfaceView) findViewById
> (R.id.camcordersurface);
> surfaceHolder = surfaceView.getHolder();
> surfaceHolder.addCallback(this);
> surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
> configureRecorder();
> }
>
> private void configureRecorder()
> {
> // configure media recorder
> recorder = new MediaRecorder();
> recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
> recorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
> recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
> recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
> recorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);
> }
>
> private void stopRecorder()
> {
> try
> {
> if (recorder == null)
> {
> return;
> }
> recorder.stop();
> recorder.reset();
> recorder.release();
> recording = false;
> recorder = null;
> }
> finally
> {
> if (recorder != null)
> {
> recorder.release();
> }
> }
> }
>
> private void startRecorder()
> {
> recorder.start();
> recording = true;
> }
>
> @Override
> public boolean onKeyDown(int keyCode, KeyEvent event)
> {
> if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER)
> {
> // if not recording then start
> if (!recording)
> {
> startRecorder();
> }
> else
> {
> // if already recording then stop
> stopRecorder();
> finish();
> }
> return true;
> }
> return super.onKeyDown(keyCode, event);
> }
>
> @Override
> public void surfaceChanged(SurfaceHolder holder, int format, int
> width,
> int height)
> {
> // do nothing
> }
>
> @Override
> public void surfaceCreated(SurfaceHolder holder)
> {
> recorder.setOutputFile("/sdcard/test" + System.currentTimeMillis
> ()
> + ".mp4");
> recorder.setPreviewDisplay(holder.getSurface());
> try
> {
> recorder.prepare();
> }
> catch (IOException e)
> {
> Log.e("error -- ", e.toString(), e);
> // TODO:
> // show error message
> }
> }
>
> @Override
> public void surfaceDestroyed(SurfaceHolder holder)
> {
> stopRecorder();
> }
> }
>
> And the layout ...
>
> <?xml version="1.0" encoding="utf-8"?>
> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/
> android"
> android:orientation="vertical"
> android:layout_width="fill_parent"
> android:layout_height="fill_parent">
> <SurfaceView android:id="@+id/camcordersurface"
> android:layout_width="fill_parent"
> android:layout_height="10dip"
> android:layout_weight="1">
> </SurfaceView>
> </LinearLayout>
>
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