创建Android视频录制器时setMaxDuration失败

我目前正在尝试在Android上创建一个非常简单的录像机，而不使用intent，只是一个自定义应用程序。下面是我的代码片段

}

但当我在emulator中部署这段代码时，在LogCat中我得到了一些类似这样的错误

java.lang.RuntimeException:无法启动活动组件信息

java.lang.RuntimeException:setMaxDuration失败。 位于android.media.MediaRecorder.setMaxDuration（本机方法）

我的代码怎么了？

引用自：

---

“注意：目前，MediaRecorder在模拟器上不工作。”

尝试在

initRecorder

中设置输出格式

setOutputFormat

function@bluefalcon“”中也没有关于

initRecorder

的任何内容。你能解释得更多吗 import java.io.IOException;

import android.app.Activity; import android.media.MediaRecorder; import android.net.NetworkInfo; import android.os.Bundle; import android.util.Log; import android.view.SurfaceHolder; import android.view.SurfaceView;

public class CameraActivity extends Activity implements SurfaceHolder.Callback { public enum State { UNKNOWN, CONNECTED, NOT_CONNECTED }

SurfaceView cameraView;
SurfaceHolder holder;
public boolean mListening;
public Object mState;
public NetworkInfo mNetworkInfo;

public boolean mSending;

boolean recording = false;
public static final String TAG = "VIDEOCAPTURE";
private MediaRecorder recorder;

protected void captureVideo() {
    if (recording) {
        recorder.stop();
        // recorder.release();
        recording = false;
        Log.v(TAG, "Recording Stopped");
        // Let's initRecorder so we can record again
        initRecorder();
        prepareRecorder();
    } else {
        recording = true;
        recorder.start();
        Log.v(TAG, "Recording Started");
    }

}

private void initRecorder() {
    recorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
    recorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
    recorder.setOutputFile("/sdcard/videocapture_example.mp4");
    recorder.setMaxDuration(50000); // 50 seconds
    recorder.setMaxFileSize(5000000); 
}

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    recorder = new MediaRecorder();
    initRecorder();
    setContentView(R.layout.main);
    cameraView = (SurfaceView) this.findViewById(R.id.CameraView);
    holder = cameraView.getHolder();
    holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
    holder.addCallback(this);
}

private void prepareRecorder() {
    recorder.setPreviewDisplay(holder.getSurface());
    try {
        recorder.prepare();
    } catch (IllegalStateException e) {
        e.printStackTrace();
        finish();
    } catch (IOException e) {
        e.printStackTrace();
        finish();
    }
}

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
}

@Override
public void surfaceCreated(SurfaceHolder holder) {
    Log.v(TAG, "surfaceCreated");
    prepareRecorder();
}

@Override
public void surfaceDestroyed(SurfaceHolder holder) {
    // camera.stopPreview();
    // camera.release();
    Log.v(TAG, "surfaceDestroyed");
    if (recording) {
        recorder.stop();
        recording = false;
    }
    recorder.release();
    finish();
}