問題獲取相機模擬工作與湯姆G的HttpCamera

Question

我想使用android模擬器預覽視頻從網絡攝像頭。我使用了tom gibara示例代碼，減去了webbroadcaster（我改爲使用通過http的VLC流）。

因此，我修改了SDK的「CameraPreview」應用程序以使用HttpCamera，但流從不出現。調試通過也不給我任何線索。我想知道其他人是否清楚明白了什麼？預覽應用程序啓動並保持黑屏。

注：http://www.inter-fuser.com/2009/09/live-camera-preview-in-android-emulator.html，但引用httpCamera代替socketcamera的：

1. 這裏描述我已經更新了原來的CameraPreview類。
2. 我更新了Tom的原始示例，以引用「Camera」類型而不是棄用的「CameraDevice」類型。
3. 以下是我的CameraPreview.java。
4. THANK YOU

 

package com.example.android.apis.graphics; 

import android.app.Activity; 
import android.content.Context; 
import android.hardware.Camera; 
import android.os.Bundle; 
import android.view.SurfaceHolder; 
import android.view.SurfaceView; 
import android.view.Window; 
import java.io.IOException; 
import android.graphics.Canvas; 

// ---------------------------------------------------------------------- 

public class CameraPreview extends Activity {  
    private Preview mPreview; 

    @Override 
protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

     // Hide the window title. 
     requestWindowFeature(Window.FEATURE_NO_TITLE); 

     // Create our Preview view and set it as the content of our activity. 
     mPreview = new Preview(this); 
     setContentView(mPreview); 
    } 

} 

// ---------------------------------------------------------------------- 

class Preview extends SurfaceView implements SurfaceHolder.Callback { 
    SurfaceHolder mHolder; 
    //Camera mCamera; 
    HttpCamera mCamera;//changed 

    Preview(Context context) { 
     super(context); 

     // Install a SurfaceHolder.Callback so we get notified when the 
     // underlying surface is created and destroyed. 
     mHolder = getHolder(); 
     mHolder.addCallback(this); 
     //mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); 
     mHolder.setType(SurfaceHolder.SURFACE_TYPE_NORMAL);//changed 
    } 

    public void surfaceCreated(SurfaceHolder holder) { 
     // The Surface has been created, acquire the camera and tell it where 
     // to draw. 
     //mCamera = Camera.open(); 
    this.StartCameraPreview(holder); 
    } 

    public void surfaceDestroyed(SurfaceHolder holder) { 
     // Surface will be destroyed when we return, so stop the preview. 
     // Because the CameraDevice object is not a shared resource, it's very 
     // important to release it when the activity is paused. 
     //mCamera.stopPreview();//changed 
     mCamera = null; 
    } 

    public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) { 
     // Now that the size is known, set up the camera parameters and begin 
     // the preview. 
     //Camera.Parameters parameters = mCamera.getParameters(); 
     //parameters.setPreviewSize(w, h); 
     //mCamera.setParameters(parameters); 
     //mCamera.startPreview(); 
    this.StartCameraPreview(holder); 
    } 

    private void StartCameraPreview(SurfaceHolder sh) 
    { 
    mCamera = new HttpCamera("10.213.74.247:443", 640, 480, true);//changed 

     try { 
      //mCamera.setPreviewDisplay(holder); 
     Canvas c = sh.lockCanvas(null); 
     mCamera.capture(c); 
     sh.unlockCanvasAndPost(c); 

     } catch (Exception exception) { 
      //mCamera.release(); 
      mCamera = null; 
      // TODO: add more exception handling logic here 
     } 
    } 

} 

Answer 1

您還沒有指定的協議爲您HttpCamera。試試 http://10.213.74.247:443