相機活動給出了我的相機意圖空指針異常

：相機活動給出了我的相機意圖空指針異常

fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE); 
intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);

這部分給了我一個空指針異常。任何人都可以解釋爲什麼需要改變？

button_1.setOnClickListener(new View.OnClickListener() { 

    public void onClick(View v) { 
     Intent intent = new Intent("android.media.action.IMAGE_CAPTURE"); 

     fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE); // create a file to save the image 
     intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); // set the image file name 

     startActivityForResult(intent, TAKE_PICTURE); 
    } 
}); 

protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
    if (requestCode == REQUEST_CODE) { 
     if (resultCode == RESULT_OK) { 
      // Image captured and saved to fileUri specified in the Intent 
      Toast.makeText(this, "Image saved to:\n" + 
        data.getData(), Toast.LENGTH_LONG).show(); 
     } else if (resultCode == RESULT_CANCELED) { 
      // User cancelled the image capture 
     } else { 
      // Image capture failed, advise user 
     } 
    } 
}

來源

2012-05-21 Housefly

哪個設備你運行這個嗎？ – Merlin

好吧，我剛剛在上週就遇到了這個問題，並且在這個問題上停留了很長時間。經過長時間的** **，我找到了答案：http://stackoverflow.com/a/10613299/1056359 – thepoosh

嘗試以下，

public class Camera extends Activity 
    { 
private static final int CAMERA_REQUEST = 1888; 
private String selectedImagePath; 
WebView webview; 
String fileName = "capturedImage.jpg"; 
private static Uri mCapturedImageURI; 

@Override 
public void onCreate(Bundle savedInstanceState) 
{ 
    super.onCreate(savedInstanceState); 
    Intent cameraIntent = new Intent(ACTION_IMAGE_CAPTURE); 
    startActivityForResult(cameraIntent, CAMERA_REQUEST); 
} 

@Override 
public void onActivityResult(int requestCode, int resultCode, Intent data) 
{ 
    if (resultCode == RESULT_OK) { 
     if (requestCode == CAMERA_REQUEST) 
     { 
      Bitmap photo = (Bitmap) data.getExtras().get("data"); 
      ByteArrayOutputStream bytes = new ByteArrayOutputStream(); 
      photo.compress(Bitmap.CompressFormat.JPEG, 40, bytes); 
      Random randomGenerator = new Random();randomGenerator.nextInt(); 
      String newimagename=randomGenerator.toString()+".jpg"; 
      File f = new File(Environment.getExternalStorageDirectory() 
            + File.separator + newimagename); 
      try { 
       f.createNewFile(); 
      } catch (IOException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 
      //write the bytes in file 

      try { 
       fo = new FileOutputStream(f.getAbsoluteFile()); 
      } catch (FileNotFoundException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 
      try { 
       fo.write(bytes.toByteArray()); 
      } catch (IOException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 
       uri=f.getAbsolutePath(); 
    //this is the url that where you are saved the image 
     } 



    }

來源

2012-05-21 08:52:22 Ponmalar

相機活動給出了我的相機意圖空指針異常

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