Пользовательская камера не работает над 4.0.4

Question

Я тестирую этот код на Android 2.2 и Android 3.2. его работа прекрасна, но когда я запускаю в android 4.0.4, он не работает. когда я нажимаю кнопку, чтобы сделать снимок, приложение не отвечает и идет висеть.

Preview.java

package com.example; 

import java.io.FileNotFoundException; 
import java.io.FileOutputStream; 
import java.io.IOException; 

import android.content.Context; 
import android.graphics.Canvas; 
import android.graphics.Color; 
import android.graphics.Paint; 
import android.hardware.Camera; 
import android.hardware.Camera.PreviewCallback; 
import android.util.Log; 
import android.view.SurfaceHolder; 
import android.view.SurfaceView; 


class Preview extends SurfaceView implements SurfaceHolder.Callback { 
    private static final String TAG = "Preview"; 

    SurfaceHolder mHolder; 
    public Camera camera; 

    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); 
    } 

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


      camera.setPreviewCallback(new PreviewCallback() { 

       public void onPreviewFrame(byte[] data, Camera arg1) { 
        FileOutputStream outStream = null; 
        try { 
         outStream = new FileOutputStream(String.format("/sdcard/%d.jpg", System.currentTimeMillis()));  
         outStream.write(data); 
         outStream.close(); 
         Log.d(TAG, "onPreviewFrame - wrote bytes: " + data.length); 
        } catch (FileNotFoundException e) { 
         e.printStackTrace(); 
        } catch (IOException e) { 
         e.printStackTrace(); 
        } finally { 
        } 
         Preview.this.invalidate(); 
       } 
      }); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
    } 

    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. 
     camera.stopPreview(); 
     camera = 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 = camera.getParameters(); 
//  parameters.setPreviewSize(w, h); 
     camera.setParameters(parameters); 
     camera.startPreview(); 
    } 

    @Override 
    public void draw(Canvas canvas) { 
      super.draw(canvas); 
      Paint p= new Paint(Color.RED); 
      Log.d(TAG,"draw"); 
      canvas.drawText("PREVIEW", canvas.getWidth()/2, canvas.getHeight()/2, p); 
    } 
} 

CameraDemo.java

package com.example; 

import java.io.FileNotFoundException; 
import java.io.FileOutputStream; 
import java.io.IOException; 

import android.app.Activity; 
import android.content.Intent; 
import android.hardware.Camera; 
import android.hardware.Camera.PictureCallback; 
import android.hardware.Camera.ShutterCallback; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.FrameLayout; 

public class CameraDemo extends Activity { 
    private static final String TAG = "CameraDemo"; 
    Camera camera; 
    Preview preview; 
    Button buttonClick; 

    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 

     preview = new Preview(this); 
     ((FrameLayout) findViewById(R.id.preview)).addView(preview); 

     buttonClick = (Button) findViewById(R.id.buttonClick); 
     buttonClick.setOnClickListener(new OnClickListener() { 
      public void onClick(View v) { 
       preview.camera.takePicture(shutterCallback, rawCallback, jpegCallback); 
      } 
     }); 

     Log.d(TAG, "onCreate'd"); 
    } 


    ShutterCallback shutterCallback = new ShutterCallback() { 
     public void onShutter() { 
      Log.d(TAG, "onShutter'd"); 
     } 
    }; 

    /** Handles data for raw picture */ 
    PictureCallback rawCallback = new PictureCallback() { 
     public void onPictureTaken(byte[] data, Camera camera) { 
      Log.d(TAG, "onPictureTaken - raw"); 
     } 
    }; 

    /** Handles data for jpeg picture */ 
    PictureCallback jpegCallback = new PictureCallback() { 
     public void onPictureTaken(byte[] data, Camera camera) { 
      FileOutputStream outStream = null; 
      long time = 0; 
      try { 
       // write to local sandbox file system 
//    outStream = CameraDemo.this.openFileOutput(String.format("%d.jpg", System.currentTimeMillis()), 0);  
       // Or write to sdcard 
       time = System.currentTimeMillis(); 
       outStream = new FileOutputStream(String.format("/sdcard/%d.jpg",time));  
       outStream.write(data); 
       outStream.close(); 
       Log.d(TAG, "onPictureTaken - wrote bytes: " + data.length); 
      } catch (FileNotFoundException e) { 
       e.printStackTrace(); 
      } catch (IOException e) { 
       e.printStackTrace(); 
      } finally { 



      } 
      Log.d(TAG, "onPictureTaken - jpeg"); 
     } 
    }; 

} 

main.xml

<?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" android:id="@+id/layout"> 
<TextView android:layout_width="fill_parent" 
    android:layout_height="wrap_content" android:text="Camera Demo" 
    android:textSize="24sp" /> 

<FrameLayout android:id="@+id/preview" 
    android:layout_weight="1" android:layout_width="fill_parent" 
    android:layout_height="fill_parent"> 
</FrameLayout> 

<Button android:layout_width="wrap_content" 
    android:layout_height="wrap_content" android:id="@+id/buttonClick" 
    android:text="Click" android:layout_gravity="center"></Button> 

</LinearLayout> 

Answer 1

Пожалуйста, не используйте эту строку "/ SDCARD". Не используйте жесткий код в коде вместо использования аккуратного подхода, вызывая метод Environment.getExternalStorageDirectory(). Я думаю, что это может быть проблемой. Пожалуйста, проверьте и подтвердите.