错误：构造函数文件（URI）未定义

Question

我试图编写一个活动，拍摄一张照片并将数据和图像保存到SD卡，我可以读取图像数据并输出它。但是，在showPhoto（）方法中出现错误“构造函数文件（Uri）未定义”）。谁能帮忙？

import java.io.File; 
import java.text.SimpleDateFormat; 
import java.util.Date; 
import java.util.Locale; 

import android.net.Uri; 
import android.os.Bundle; 
import android.os.Environment; 
import android.preference.PreferenceManager.OnActivityResultListener; 
import android.provider.MediaStore; 
import android.app.Activity; 
import android.content.Intent; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.graphics.drawable.BitmapDrawable; 
import android.graphics.drawable.Drawable; 
import android.util.Log; 
import android.view.Menu; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.ImageView; 
import android.widget.Toast; 

public class CallCamera extends Activity { 


    private static final String TAG = "CallCamera"; 
    private static final int CAPTURE_IMAGE_ACTIVITY_REQ = 0; 

    Uri fileUri = null; 
    ImageView photoImage = null; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_call_camera); 
     photoImage=(ImageView) findViewById(R.id.photo_image); 
     Button callCameraButton = (Button)findViewById(R.id.button_callcamera); 
      callCameraButton.setOnClickListener(new View.OnClickListener(){ 

       public void onClick(View view){ 
        Intent i= new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
        File file = getOutputPhotoFile(); 
        fileUri=Uri.fromFile(getOutputPhotoFile()); 
        i.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); 
        startActivityForResult(i, CAPTURE_IMAGE_ACTIVITY_REQ); //returns photo file to activity when camera is done 
       } 
        //store photo taken on SD card 
       private File getOutputPhotoFile() { 
        File directory = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),getPackageName()); 

        if (!directory.exists()){ 
         if(!directory.mkdirs()){ 
          Log.e(TAG,"Failed to create storage directory."); 
          return null; 
         } 
        } 

        //set photo name with standard time linked and store on sdCard in standard picture directory 
        String timeStamp = new SimpleDateFormat("yyyMMdd_HHmmss",Locale.ENGLISH).format(new Date()); 
        return new File(directory.getPath() + File.separator + "IMG_"+timeStamp+".jpg"); 
       } 


      protected void onActivityResult (int requestCode, int resultCode, Intent data){ 
       if (requestCode==CAPTURE_IMAGE_ACTIVITY_REQ){ 
        if(resultCode==RESULT_OK){ 
         Uri photoUri = null; 
        if (data==null){ 
         //confirming image save 
         Toast.makeText(CallCamera.this, "Image saved successfully", Toast.LENGTH_LONG).show(); 
         photoUri=fileUri; 
        } else { 
         photoUri = data.getData(); 
         Toast.makeText(CallCamera.this, "imaged saved successfully in: " + data.getData(), Toast.LENGTH_LONG).show(); 
         } 
        photoUri = data.getData(); 
        showPhoto(photoUri); 

        } else if (resultCode==RESULT_CANCELED) { 
         Toast.makeText(CallCamera.this,"Cancelled", Toast.LENGTH_SHORT).show(); 
        } else { 
         Toast.makeText(CallCamera.this, "Callout for image capture failed!", Toast.LENGTH_LONG).show(); 
        } 
       } 
      } 

      }); 


    } 
    protected void showPhoto(Uri photoUri) { 
     File imageFile = new File(photoUri); 
     if (imageFile.exists()){ 
      Drawable oldDrawable = photoImage.getDrawable();if(oldDrawable !=null) { ((BitmapDrawable)oldDrawable).getBitmap().recycle(); 

      } 
     } 

     if (imageFile.exists()){ 
      Bitmap bitmap = BitmapFactory.decodeFile(imageFile.getAbsolutePath()); 
      BitmapDrawable drawable = new BitmapDrawable(this.getResources(),bitmap); 
      photoImage.setScaleType(ImageView.ScaleType.FIT_CENTER);; 
      photoImage.setImageDrawable(drawable); 

     } 

    } 

Answer 1

尝试这样做，而不是：

File imageFile = new File(photoUri.getPath());