Databases
StackOverflow2013
Postsdbo
POcalculateInSampleSize() For Bitmap Image Issue
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POcalculateInSampleSize() For Bitmap Image Issue
    primarykey
    data
    text
    <p>I am facing a huge problem to displaying bitmap image in ImageView in my app. I have an activity which is displaying 8 photos in 2 column and 4 rows. When i click on any photo out of these 8 photos, the photo should be as large as device size. But here i have a issue is that when i click on any photo it give me sometime OutOfMemoryError Error. Please refere my below code where i displaying this large photo inside the imageView : </p> <pre><code>public class ViewFullImage extends Activity { private Bitmap bitmap_general; private ImageView iv; private static final String path = "mfc/cam_img/"; private int s_id; private int intentKey; private int width; private int height; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.view_draw_picture); // Display display= ((WindowManager) getSystemService(ViewFullImage.WINDOW_SERVICE)).getDefaultDisplay(); // width = display.getWidth(); // height = display.getHeight(); Display mDisplay= ((Activity) this).getWindowManager().getDefaultDisplay(); width= mDisplay.getWidth(); height= mDisplay.getHeight(); Log.v("","===================== viewFullImage.java================"); Log.v("","This is height ViewImage : "+height/2); Log.v("","This is width ViewImage : "+width/2); s_id=getIntent().getIntExtra("s_id", -1); intentKey=getIntent().getIntExtra("iv", -1); iv = (ImageView)findViewById(R.id.image); new LongOperation().execute(); } //Image Rotation Bitmap rotateBitmap(Bitmap bitmap) { Matrix matrix = new Matrix(); matrix.postRotate(90); Bitmap bitmap1 = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true); bitmap.recycle(); bitmap=null; return bitmap1; } //Calculate Image size public static int calculateInSampleSize( BitmapFactory.Options options, int reqWidth, int reqHeight) { // Raw height and width of image final int height = options.outHeight; final int width = options.outWidth; int inSampleSize = 1; if (height &gt; reqHeight || width &gt; reqWidth) { // Calculate ratios of height and width to requested height and width final int heightRatio = Math.round((float) height / (float) reqHeight); final int widthRatio = Math.round((float) width / (float) reqWidth); // Choose the smallest ratio as inSampleSize value, this will guarantee // a final image with both dimensions larger than or equal to the // requested height and width. inSampleSize = heightRatio &lt; widthRatio ? heightRatio : widthRatio; } return inSampleSize; } public void onDestroy() { super.onDestroy(); System.gc(); } public static Bitmap decodeSampleImage(File f, int width, int height) { try { System.gc(); // First of all free some memory // Decode image size BitmapFactory.Options o = new BitmapFactory.Options(); o.inJustDecodeBounds = true; BitmapFactory.decodeStream(new FileInputStream(f), null, o); // The new size we want to scale to final int requiredWidth = width; final int requiredHeight = height; // Find the scale value (as a power of 2) int sampleScaleSize = 1; while (o.outWidth / sampleScaleSize / 2 &gt;= requiredWidth &amp;&amp; o.outHeight / sampleScaleSize / 2 &gt;= requiredHeight) sampleScaleSize *= 2; // Decode with inSampleSize BitmapFactory.Options o2 = new BitmapFactory.Options(); o2.inSampleSize = sampleScaleSize; return BitmapFactory.decodeStream(new FileInputStream(f), null, o2); } catch (Exception e) { Log.v("", e.getMessage()); // We don't want the application to just throw an exception } return null; } int h; int w; class LongOperation extends AsyncTask&lt;String, Void, String&gt; { private ProgressDialog Dialog = new ProgressDialog(ViewFullImage.this); @Override protected String doInBackground(String... aurl) { runOnUiThread(new Runnable() { public void run() { // TODO Auto-generated method stub File Dir= Environment.getExternalStorageDirectory(); File imageDirectory = new File(Dir,path); File file = new File(imageDirectory, "img_"+s_id+"_"+intentKey+".jpg"); String ImgFile_Name = file.getAbsolutePath(); BitmapFactory.Options options = new BitmapFactory.Options(); BitmapFactory.decodeFile(file.getAbsolutePath(),options); h = options.outHeight; w = options.outWidth; options.inSampleSize = calculateInSampleSize(options, width/5, height/5); options.inJustDecodeBounds = false; options.inScaled=true; if(bitmap_general!=null){ bitmap_general.recycle(); bitmap_general=null; } bitmap_general = BitmapFactory.decodeFile(ImgFile_Name,options); try { if(h&lt;w) { iv.setImageBitmap(rotateBitmap(bitmap_general)); } else{ iv.setImageBitmap(bitmap_general); } } catch (Exception e) { e.printStackTrace(); if(bitmap_general!=null){ bitmap_general.recycle(); bitmap_general=null; } System.gc(); } finally{ if(bitmap_general!=null){ bitmap_general.recycle(); bitmap_general=null; } System.gc(); } } }); return null; } protected void onPreExecute() { Dialog.setMessage("Loading Image..."); Dialog.show(); } protected void onPostExecute(String resultGot) { Dialog.dismiss(); } } } </code></pre> <p>Xml Layout File : </p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#000000" android:id="@+id/RootView"&gt; &lt;ImageView android:id="@+id/image" android:layout_width="fill_parent" android:layout_height="fill_parent" android:adjustViewBounds="true"/&gt; &lt;/RelativeLayout&gt; </code></pre> <p>Here in above code i m bit confuse in what Height and Width value should be i need to enter in below statement : </p> <pre><code>options.inSampleSize = calculateInSampleSize(options, width, height); </code></pre> <p>Please anybody tell me where i m doing bad thing in my code ?</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USuser2507920
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload