DUI: fix SysUI FC when chosing a big img as navbar iconn7.0

Change-Id: I7ef4c5d6e997ab3f7b9f0ce00f24ea9cf033f187
Reference: https://developer.android.com/training/displaying-bitmaps/load-bitmap.html

1 files changed, 61 insertions, 2 deletions

diff --git a/src/com/android/internal/utils/du/DUActionUtils.java b/src/com/android/internal/utils/du/DUActionUtils.java
index 58ebd8f..1e8534a 100644
--- a/src/com/android/internal/utils/du/DUActionUtils.java
+++ b/src/com/android/internal/utils/du/DUActionUtils.java
@@ -56,6 +56,7 @@ import android.view.WindowManager;
 import android.view.WindowManagerGlobal;
 
 import java.io.FileNotFoundException;
+import java.io.IOException;
 import java.io.InputStream;
 import java.net.URISyntaxException;
 import java.util.ArrayList;
@@ -448,19 +449,77 @@ public final class DUActionUtils {
     }
 
     public static Drawable getDrawable(Context context, Uri uri) {
+        //set inputs here so we can clean up them in the finally
+        InputStream inputStream = null;
         try {
+            //get the inputstream
+            inputStream = context.getContentResolver().openInputStream(uri);
+
+            //get available bitmapfactory options
             BitmapFactory.Options options = new BitmapFactory.Options();
+            //query the bitmap to decode the stream but don't allocate pixels in memory yet
+            options.inJustDecodeBounds = true;
+            //decode the bitmap with calculated bounds
+            Bitmap b1 = BitmapFactory.decodeStream(inputStream, null, options);
+            //check if the bitmap is too big, if yes scale the quality
+            options.inSampleSize = calculateInSampleSize(options);
+
+            //We need to close and load again the inputstream to avoid null
+            try {
+                inputStream.close();
+            }
+            catch (IOException e) {
+                e.printStackTrace();
+            }
+            inputStream = context.getContentResolver().openInputStream(uri);
+
+            //decode the stream again, with the calculated SampleSize option, 
+            //and allocate the memory. Also add some metrics options to take a proper density
+            options.inJustDecodeBounds = false;
             DisplayMetrics metrics = context.getResources().getDisplayMetrics();
             options.inScreenDensity = metrics.densityDpi;
             options.inTargetDensity = metrics.densityDpi;
             options.inDensity = DisplayMetrics.DENSITY_DEFAULT;
-            InputStream inputStream = context.getContentResolver().openInputStream(uri);
-            Bitmap b1 = BitmapFactory.decodeStream(inputStream, null, options);
+            b1 = BitmapFactory.decodeStream(inputStream, null, options);
             return new BitmapDrawable(context.getResources(), b1);
         } catch (FileNotFoundException e) {
             e.printStackTrace();
             return null;
+        //clean up the system resources
+        } finally {
+                if (inputStream != null) {
+                    try {
+                        inputStream.close();
+                    }
+                    catch (IOException e) {
+                        e.printStackTrace();
+                    }
+                }
+         }
+    }
+
+    //Automate the quality scaling process
+    public static int calculateInSampleSize(BitmapFactory.Options options) {
+        //we do not scale quality if size is not more than 512x512
+        final int reqHeight = 512;
+        final int reqWidth = 512;
+        // get raw height and width of image
+        int height = options.outHeight;
+        int width = options.outWidth;
+        //do not scale quality for now
+        int inSampleSize = 1;
+
+        // If the img is too big, calculate the largest inSampleSize value that is a power of 2
+        //  and keeps both height and width larger than the requested height and width.
+        if (height > reqHeight || width > reqWidth) {
+            final int halfHeight = height / 2;
+            final int halfWidth = width / 2;
+            while ((halfHeight / inSampleSize) >= reqHeight
+                    && (halfWidth / inSampleSize) >= reqWidth) {
+                inSampleSize *= 2;
+            }
         }
+        return inSampleSize;
     }
 
     public static Drawable getDrawableFromComponent(PackageManager pm, String activity) {