- Compressor.java : Added method for compressing and copying the image using the Uri.

- ImageUti.java : Method to fetch and compress the image using the Uri.

Author: Mohammed Rampurawala

compressor/src/main/java/id/zelory/compressor/Compressor.java

@@ -2,12 +2,15 @@
 
 import android.content.Context;
 import android.graphics.Bitmap;
+import android.net.Uri;
 
 import java.io.File;
 import java.io.IOException;
+import java.lang.ref.WeakReference;
 import java.util.concurrent.Callable;
 
 import io.reactivex.Flowable;
+import io.reactivex.annotations.Nullable;
 
 /**
  * Created on : June 18, 2016
@@ -22,9 +25,11 @@ public class Compressor {
     private Bitmap.CompressFormat compressFormat = Bitmap.CompressFormat.JPEG;
     private int quality = 80;
     private String destinationDirectoryPath;
+    private WeakReference<Context> contextWeakReference;
 
     public Compressor(Context context) {
         destinationDirectoryPath = context.getCacheDir().getPath() + File.separator + "images";
+        contextWeakReference = new WeakReference<Context>(context);
     }
 
     public Compressor setMaxWidth(int maxWidth) {
@@ -61,6 +66,14 @@ public File compressToFile(File imageFile, String compressedFileName) throws IOE
                 destinationDirectoryPath + File.separator + compressedFileName);
     }
 
+    public @Nullable File compressToUri(Uri imageUri, String compressedFileName) throws IOException {
+        if (contextWeakReference == null || contextWeakReference.get() == null) {
+            return null;
+        }
+        return ImageUtil.compressImage(contextWeakReference.get(),imageUri, maxWidth, maxHeight, compressFormat, quality,
+                destinationDirectoryPath + File.separator + compressedFileName);
+    }
+
     public Bitmap compressToBitmap(File imageFile) throws IOException {
         return ImageUtil.decodeSampledBitmapFromFile(imageFile, maxWidth, maxHeight);
     }

compressor/src/main/java/id/zelory/compressor/ImageUtil.java

@@ -1,13 +1,17 @@
 package id.zelory.compressor;
 
+import android.content.Context;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.graphics.Matrix;
 import android.media.ExifInterface;
+import android.net.Uri;
 
 import java.io.File;
+import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
+import java.io.InputStream;
 
 /**
  * Created on : June 18, 2016
@@ -41,6 +45,46 @@ static File compressImage(File imageFile, int reqWidth, int reqHeight, Bitmap.Co
         return new File(destinationPath);
     }
 
+    static File compressImage(Context context, Uri imageUri, int reqWidth, int reqHeight, Bitmap.CompressFormat compressFormat, int quality, String destinationPath) throws IOException {
+        FileOutputStream fileOutputStream = null;
+        File file = new File(destinationPath).getParentFile();
+        if (!file.exists()) {
+            file.mkdirs();
+        }
+        try {
+            fileOutputStream = new FileOutputStream(destinationPath);
+            // write the compressed bitmap at the destination specified by destinationPath.
+            decodeSampledBitmapFromUri(context, imageUri, reqWidth, reqHeight).compress(compressFormat, quality, fileOutputStream);
+        } finally {
+            if (fileOutputStream != null) {
+                fileOutputStream.flush();
+                fileOutputStream.close();
+            }
+        }
+
+        return new File(destinationPath);
+    }
+
+     static Bitmap decodeSampledBitmapFromUri(Context context, Uri imageUri, int reqWidth, int reqHeight) throws FileNotFoundException {
+        BitmapFactory.Options options = new BitmapFactory.Options();
+        options.inJustDecodeBounds = true;
+        InputStream inputStream = context.getContentResolver().openInputStream(imageUri);
+        BitmapFactory.decodeStream(inputStream, null, options);
+
+        // Calculate inSampleSize
+        options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
+
+        // Decode bitmap with inSampleSize set
+        options.inJustDecodeBounds = false;
+
+        Bitmap scaledBitmap = BitmapFactory.decodeStream(inputStream, null, options);
+
+        //check the rotation of the image and display it properly
+        Matrix matrix = new Matrix();
+        scaledBitmap = Bitmap.createBitmap(scaledBitmap, 0, 0, scaledBitmap.getWidth(), scaledBitmap.getHeight(), matrix, true);
+        return scaledBitmap;
+    }
+
     static Bitmap decodeSampledBitmapFromFile(File imageFile, int reqWidth, int reqHeight) throws IOException {
         // First decode with inJustDecodeBounds=true to check dimensions
         BitmapFactory.Options options = new BitmapFactory.Options();