安卓：从相机和画廊运行时异常

Question

下面的图片是我的错误的日志猫：

03-08 13:20:36.193: E/AndroidRuntime(9486): FATAL EXCEPTION: main 
    03-08 13:20:36.193: E/AndroidRuntime(9486): java.lang.RuntimeException: Unable to resume activity {com.example.camtest1/com.example.camtest1.MainActivity}: android.database.StaleDataException: Attempted to access a cursor after it has been closed. 
    03-08 13:20:36.193: E/AndroidRuntime(9486): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2639) 
    03-08 13:20:36.193: E/AndroidRuntime(9486): at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2667) 
    03-08 13:20:36.193: E/AndroidRuntime(9486): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1279) 
    03-08 13:20:36.193: E/AndroidRuntime(9486): at android.os.Handler.dispatchMessage(Handler.java:99) 
    03-08 13:20:36.193: E/AndroidRuntime(9486): at android.os.Looper.loop(Looper.java:137) 
    03-08 13:20:36.193: E/AndroidRuntime(9486): at android.app.ActivityThread.main(ActivityThread.java:4935) 
    03-08 13:20:36.193: E/AndroidRuntime(9486): at java.lang.reflect.Method.invokeNative(Native Method) 
    03-08 13:20:36.193: E/AndroidRuntime(9486): at java.lang.reflect.Method.invoke(Method.java:511) 
    03-08 13:20:36.193: E/AndroidRuntime(9486): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038) 
    03-08 13:20:36.193: E/AndroidRuntime(9486): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805) 
    03-08 13:20:36.193: E/AndroidRuntime(9486): at dalvik.system.NativeStart.main(Native Method) 
    03-08 13:20:36.193: E/AndroidRuntime(9486): Caused by: android.database.StaleDataException: Attempted to access a cursor after it has been closed. 
    03-08 13:20:36.193: E/AndroidRuntime(9486): at android.database.BulkCursorToCursorAdaptor.throwIfCursorIsClosed(BulkCursorToCursorAdaptor.java:64) 
    03-08 13:20:36.193: E/AndroidRuntime(9486): at android.database.BulkCursorToCursorAdaptor.requery(BulkCursorToCursorAdaptor.java:133) 
    03-08 13:20:36.193: E/AndroidRuntime(9486): at android.database.CursorWrapper.requery(CursorWrapper.java:186) 
    03-08 13:20:36.193: E/AndroidRuntime(9486): at android.app.Activity.performRestart(Activity.java:5246) 
    03-08 13:20:36.193: E/AndroidRuntime(9486): at android.app.Activity.performResume(Activity.java:5272) 
    03-08 13:20:36.193: E/AndroidRuntime(9486): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2629) 
    03-08 13:20:36.193: E/AndroidRuntime(9486): ... 10 more 

我无法accertain在我的代码是怎么了。以下是我试图捕捉或从图库中选择与三星处理的图片做的代码：

import java.io.ByteArrayOutputStream; 
    import android.app.Activity; 
    import android.app.AlertDialog; 
    import android.content.DialogInterface; 
    import android.content.Intent; 
    import android.database.Cursor; 
    import android.graphics.Bitmap; 
    import android.graphics.BitmapFactory; 
    import android.net.Uri; 
    import android.os.Bundle; 
    import android.provider.MediaStore; 
    import android.view.View; 
    import android.widget.Button; 
    import android.widget.ImageView; 
    import android.widget.Toast; 

public class MainActivity extends Activity { 


String picturePath; 
private static int RESULT_LOAD_IMAGE = 1; 
private static final int PICK_FROM_GALLERY = 2; 
int CAMERA_PIC_REQUEST = 1337; 
Bitmap thumbnail = null; 
private static final int OG=4; 

private static final int CAMERA_IMAGE_CAPTURE = 0; 
Uri u; 
ImageView imgview; 
//int z=0; 
String z=null; 
byte b[]; 
String largeImagePath = ""; 
Uri uriLargeImage; 
Uri uriThumbnailImage; 
Cursor myCursor; 





public void imageCam(Bitmap thumbnail){ 
     Bitmap photo = thumbnail; 
     ByteArrayOutputStream bos = new ByteArrayOutputStream(); 
     photo.compress(Bitmap.CompressFormat.JPEG, 70, bos); 
     b = bos.toByteArray(); 
     ImageView imageview = (ImageView)findViewById(R.id.imageView1); 
    // Bitmap bt=Bitmap.createScaledBitmap(photo, 200, 400, false); 
     imageview.setImageBitmap(photo); 

    } 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    Button bt = (Button)findViewById(R.id.button1); 
    bt.setOnClickListener(onBTN); 
    if(savedInstanceState != null) { 
     //if() 
     Bitmap Zatang; 
     String B1 = savedInstanceState .getString("message"); 
     Toast.makeText(this, "SavedYeah"+B1, Toast.LENGTH_LONG).show(); 
     BitmapFactory.Options opts = new BitmapFactory.Options(); 
     opts.inSampleSize = OG; 
     // thumbnail = (BitmapFactory.decodeFile(picturePath)); 
     Zatang = BitmapFactory.decodeFile((B1), opts); 
     System.gc(); 
     if(Zatang != null){ 
      Toast.makeText(this, "Success Zatang"+B1, Toast.LENGTH_LONG).show(); 
      imageCam(Zatang); 

     } 
     String B12 = savedInstanceState .getString("Gallerymessage"); 
     if(B12 != null){ 
      Toast.makeText(this, "Recreated on Gallery", Toast.LENGTH_LONG).show(); 
      BitmapFactory.Options opts1 = new BitmapFactory.Options(); 
      opts.inSampleSize = OG; 
      // thumbnail = (BitmapFactory.decodeFile(picturePath)); 
      thumbnail = BitmapFactory.decodeFile((B12), opts1); 
      System.gc(); 
      imageCam(thumbnail); 

     } 

} 

} 


private View.OnClickListener onBTN = new View.OnClickListener(){ 
    public void onClick(View v){ 
     openNewGameDialog(); 
    } 
}; 
String []B = {"Camera", "Gallery"}; 


private void openNewGameDialog(){ 
      new AlertDialog.Builder(this).setItems(B,new  DialogInterface.OnClickListener(){ 
      public void onClick(DialogInterface dialoginterface,int i){ 
       if(i==0){ 
        String BX1 = android.os.Build.MANUFACTURER; 

        if(BX1.equalsIgnoreCase("samsung")){ 
        Toast.makeText(getApplicationContext(), "Device man"+BX1, Toast.LENGTH_LONG).show(); 
        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
        startActivityForResult(intent, CAMERA_IMAGE_CAPTURE); 

        } 
        else { 
         Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
         startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST); 
        } 
       } 

       else if (i==1){ 
        // Intent in = new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI); 
        // startActivityForResult(in, RESULT_LOAD_IMAGE); 


         Intent intent = new Intent(Intent.ACTION_PICK); 
         intent.setType("image/*"); 
         startActivityForResult(intent, RESULT_LOAD_IMAGE); 
       } 




      } 
      }) 
      .show(); 
    } 

protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
     super.onActivityResult(requestCode, resultCode, data); 
     if(requestCode==CAMERA_IMAGE_CAPTURE && resultCode==Activity.RESULT_OK){ 

     // Describe the columns you'd like to have returned. Selecting from the Thumbnails location gives you both the Thumbnail Image ID, as well as the original image ID 
     String[] projection = { 
     MediaStore.Images.Thumbnails._ID, // The columns we want 
     MediaStore.Images.Thumbnails.IMAGE_ID, 
     MediaStore.Images.Thumbnails.KIND, 
     MediaStore.Images.Thumbnails.DATA}; 
     String selection = MediaStore.Images.Thumbnails.KIND + "=" + // Select only mini's 
     MediaStore.Images.Thumbnails.MINI_KIND; 

     String sort = MediaStore.Images.Thumbnails._ID + " DESC"; 

     //At the moment, this is a bit of a hack, as I'm returning ALL images, and just taking the latest one. There is a better way to narrow this down I think with a WHERE clause which is currently the selection variable 
     myCursor = this.managedQuery(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, projection, selection, null, sort); 

     long imageId = 0l; 
     long thumbnailImageId = 0l; 
     String thumbnailPath = ""; 

     try{ 

      myCursor.moveToFirst(); 
      imageId = myCursor.getLong(myCursor.getColumnIndexOrThrow(MediaStore.Images.Thumbnails.IMAGE_ID)); 
      thumbnailImageId = myCursor.getLong(myCursor.getColumnIndexOrThrow(MediaStore.Images.Thumbnails._ID)); 
      thumbnailPath = myCursor.getString(myCursor.getColumnIndexOrThrow(MediaStore.Images.Thumbnails.DATA)); 
      } 
     finally{ 
      myCursor.close(); 
      } 

      //Create new Cursor to obtain the file Path for the large image 

       String[] largeFileProjection = { 
       MediaStore.Images.ImageColumns._ID, 
       MediaStore.Images.ImageColumns.DATA 
       }; 

       String largeFileSort = MediaStore.Images.ImageColumns._ID + " DESC"; 
       myCursor = this.managedQuery(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, largeFileProjection, null, null, largeFileSort); 
       largeImagePath = ""; 

       try{ 
        myCursor.moveToFirst(); 

        //This will actually give yo uthe file path location of the image. 
        largeImagePath = myCursor.getString(myCursor.getColumnIndexOrThrow(MediaStore.Images.ImageColumns.DATA)); 
       } 
       finally{myCursor.close();} 
       // These are the two URI's you'll be interested in. They give you a handle to the actual images 
       uriLargeImage = Uri.withAppendedPath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, String.valueOf(imageId)); 
       uriThumbnailImage = Uri.withAppendedPath(MediaStore.Images.Thumbnails.EXTERNAL_CONTENT_URI, String.valueOf(thumbnailImageId)); 

       // I've left out the remaining code, as all I do is assign the URI's to my own objects anyways... 
       // Toast.makeText(this, ""+largeImagePath, Toast.LENGTH_LONG).show(); 
       // Toast.makeText(this, ""+uriLargeImage, Toast.LENGTH_LONG).show(); 
       // Toast.makeText(this, ""+uriThumbnailImage, Toast.LENGTH_LONG).show(); 


       if(largeImagePath != null){ 
        Toast.makeText(this, "LARGE YES"+largeImagePath, Toast.LENGTH_LONG).show(); 

        BitmapFactory.Options opts = new BitmapFactory.Options(); 
        opts.inSampleSize = OG; 
        // thumbnail = (BitmapFactory.decodeFile(picturePath)); 
        thumbnail = BitmapFactory.decodeFile((largeImagePath), opts); 
        System.gc(); 
        if(thumbnail != null){ 
         Toast.makeText(this, "Try Without Saved Instance", Toast.LENGTH_LONG).show(); 
         imageCam(thumbnail); 
        } 




       }if(uriLargeImage != null){ 


        Toast.makeText(this, ""+uriLargeImage, Toast.LENGTH_LONG).show(); 





       }if(uriThumbnailImage != null){ 


        Toast.makeText(this, ""+uriThumbnailImage, Toast.LENGTH_LONG).show(); 



       } 



     } 
     if(requestCode == 1337 && resultCode== RESULT_OK){ 
       Bundle extras = data.getExtras(); 
       // if (extras!=null){ 
       if (extras.keySet().contains("data")){ 

         BitmapFactory.Options options = new BitmapFactory.Options(); 
         // options.inSampleSize = 1; 
         // options.inPurgeable = true; 
         // options.inInputShareable = true; 
         thumbnail = (Bitmap) extras.get("data"); 
         // image(thumbnail); 
         if (thumbnail != null){ 
         Toast.makeText(this, "YES Thumbnail", Toast.LENGTH_LONG).show(); 
          BitmapFactory.Options opt = new BitmapFactory.Options(); 
          // options.inSampleSize = 1; 
          // options.inPurgeable = true; 
          // options.inInputShareable = true; 
          thumbnail = (Bitmap) extras.get("data"); 
          imageCam(thumbnail); 
         } 

        }else{ 

        Uri imageURI = getIntent().getData(); 
        ImageView imageview = (ImageView)findViewById(R.id.imageView1); 
        imageview.setImageURI(imageURI); 

        if(imageURI != null){ 
        Toast.makeText(this, "YES Image Uri", Toast.LENGTH_LONG).show(); 

        } 





         // Toast.makeText(CreateProfile.this, "Picture NOt taken", Toast.LENGTH_LONG).show(); 
        } 
       super.onActivityResult(requestCode, resultCode, data); 
     } 
     if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data){ 
       Uri selectedImage = data.getData(); 

        String[] filePathColumn = { MediaStore.Images.Media.DATA }; 
        Cursor cursor = getContentResolver().query(selectedImage,filePathColumn, null, null, null); 
        cursor.moveToFirst(); 
        int columnIndex = cursor.getColumnIndex(filePathColumn[0]); 
        String picturePath = cursor.getString(columnIndex); 
        cursor.close(); 
        BitmapFactory.Options opts = new BitmapFactory.Options(); 
        opts.inSampleSize = OG; 
        // thumbnail = (BitmapFactory.decodeFile(picturePath)); 
        thumbnail = BitmapFactory.decodeFile((picturePath), opts); 
        System.gc(); 
        imageCam(thumbnail); 

      } 

       else 
       { 
        // imgview.setBackgroundResource(R.drawable.bbtb); 
       } 

     } 
    @Override 
    public void onSaveInstanceState(Bundle outState) { 
     super.onSaveInstanceState(outState); 
     outState.putString("message",largeImagePath); 
     outState.putString("Gallerymessage",picturePath); 


    } 

}

Answer 1

我有同样的问题，据透露，在某些设备/ API级别时，使用相机意图，正在调用onDestroy（）。在我的onDestroy中，我正在像通常那样关闭游标和数据库。

您可以通过检查数据库是否为.open和cursor == null来解决此问题： onActivityResult或onResume然后在需要时重新打开并更新游标。

if (!database.isOpen() || database==null) { 
    patternsdb helper = new patternsdb(main.this); 
    database = helper.getWritableDatabase(); 
}