src/com/owncloud/android/ui/preview/ImageViewCustom.java

   1 package com.owncloud.android.ui.preview;
   2
   3 import android.annotation.SuppressLint;
   4 import android.content.Context;
   5 import android.graphics.Bitmap;
   6 import android.graphics.Canvas;
   7 import android.os.Build;
   8 import android.util.AttributeSet;
   9 import android.view.View;
  10 import android.widget.ImageView;
  11
  12 import com.owncloud.android.lib.common.utils.Log_OC;
  13
  14 public class ImageViewCustom extends ImageView {
  15
  16     private static final String TAG = ImageViewCustom.class.getSimpleName();
  17
  18     private static final boolean IS_ICS_OR_HIGHER = Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH;
  19
  20     private int mBitmapHeight;
  21     private int mBitmapWidth;
  22
  23
  24     public ImageViewCustom(Context context) {
  25         super(context);
  26     }
  27
  28     public ImageViewCustom(Context context, AttributeSet attrs) {
  29         super(context, attrs);
  30     }
  31
  32     public ImageViewCustom(Context context, AttributeSet attrs, int defStyle) {
  33         super(context, attrs, defStyle);
  34     }
  35
  36     @SuppressLint("NewApi")
  37         @Override
  38     protected void onDraw(Canvas canvas) {
  39
  40         if(IS_ICS_OR_HIGHER && checkIfMaximumBitmapExceed(canvas)) {
  41             // Set layer type to software one for avoiding exceed
  42             // and problems in visualization
  43             setLayerType(View.LAYER_TYPE_SOFTWARE, null);
  44         }
  45
  46         super.onDraw(canvas);
  47     }
  48
  49     /**
  50      * Checks if current bitmaps exceed the maximum OpenGL texture size limit
  51      * @param canvas        Canvas where the view will be drawn into.
  52      * @return boolean      True means that the bitmap is too big for the canvas.
  53      */
  54     @SuppressLint("NewApi")
  55         private boolean checkIfMaximumBitmapExceed(Canvas canvas) {
  56         Log_OC.v(TAG, "Canvas maximum: " + canvas.getMaximumBitmapWidth() + " - " + canvas.getMaximumBitmapHeight());
  57         if (mBitmapWidth > canvas.getMaximumBitmapWidth()
  58                 || mBitmapHeight > canvas.getMaximumBitmapHeight()) {
  59             return true;
  60         }
  61
  62         return false;
  63     }
  64
  65     @Override
  66     /**
  67      * Keeps the size of the bitmap cached in member variables for faster access in {@link #onDraw(Canvas)} ,
  68      * but without keeping another reference to the {@link Bitmap}
  69      */
  70     public void setImageBitmap (Bitmap bm) {
  71         mBitmapWidth = bm.getWidth();
  72         mBitmapHeight = bm.getHeight();
  73         super.setImageBitmap(bm);
  74     }
  75
  76 }