Use Glide to load media preview images

Closes #3344
// FREEBIE

res/layout/media_preview_activity.xml

@@ -5,20 +5,10 @@
                 android:layout_height="match_parent"
                 android:background="@color/gray95">
 
-    <ImageView android:id="@+id/image"
+    <org.thoughtcrime.securesms.components.ZoomingImageView
+               android:id="@+id/image"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
-               android:contentDescription="@string/media_preview_activity__image_content_description"
+               android:contentDescription="@string/media_preview_activity__image_content_description" />
-               android:visibility="gone"/>
-
-    <TextView android:id="@+id/error"
-              android:layout_width="wrap_content"
-              android:layout_height="wrap_content"
-              android:layout_centerInParent="true"
-              android:background="#ff600000"
-              android:textColor="#ffffffff"
-              android:textSize="15sp"
-              android:padding="10dp"
-              android:visibility="gone" />
 
 </RelativeLayout>

src/org/thoughtcrime/securesms/MediaPreviewActivity.java

@@ -21,8 +21,6 @@ import android.content.DialogInterface;
 import android.content.Intent;
 import android.graphics.Bitmap;
 import android.net.Uri;
-import android.opengl.GLES20;
-import android.os.AsyncTask;
 import android.os.Build.VERSION;
 import android.os.Build.VERSION_CODES;
 import android.os.Bundle;
@@ -33,25 +31,18 @@ import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.WindowManager;
-import android.widget.ImageView;
-import android.widget.TextView;
 import android.widget.Toast;
 
+import org.thoughtcrime.securesms.components.ZoomingImageView;
 import org.thoughtcrime.securesms.crypto.MasterSecret;
 import org.thoughtcrime.securesms.recipients.Recipient;
 import org.thoughtcrime.securesms.recipients.Recipient.RecipientModifiedListener;
 import org.thoughtcrime.securesms.recipients.RecipientFactory;
-import org.thoughtcrime.securesms.util.BitmapDecodingException;
-import org.thoughtcrime.securesms.util.BitmapUtil;
 import org.thoughtcrime.securesms.util.DateUtils;
 import org.thoughtcrime.securesms.util.DynamicLanguage;
 import org.thoughtcrime.securesms.util.SaveAttachmentTask;
 import org.thoughtcrime.securesms.util.SaveAttachmentTask.Attachment;
 
-import java.io.IOException;
-
-import uk.co.senab.photoview.PhotoViewAttacher;
-
 /**
  * Activity for displaying media attachments in-app
  */
@@ -64,12 +55,9 @@ public class MediaPreviewActivity extends PassphraseRequiredActionBarActivity im
   private final DynamicLanguage dynamicLanguage = new DynamicLanguage();
 
   private MasterSecret masterSecret;
-  private boolean      paused;
 
-  private TextView          errorText;
   private Bitmap            bitmap;
-  private ImageView         image;
+  private ZoomingImageView  image;
-  private PhotoViewAttacher imageAttacher;
   private Uri               mediaUri;
   private String            mediaType;
   private Recipient         recipient;
@@ -114,14 +102,14 @@ public class MediaPreviewActivity extends PassphraseRequiredActionBarActivity im
     } else {
       relativeTimeSpan = null;
     }
-    getSupportActionBar().setTitle(recipient == null ? getString(R.string.MediaPreviewActivity_you) : recipient.toShortString());
+    getSupportActionBar().setTitle(recipient == null ? getString(R.string.MediaPreviewActivity_you)
+                                                     : recipient.toShortString());
     getSupportActionBar().setSubtitle(relativeTimeSpan);
   }
 
   @Override
   public void onResume() {
     super.onResume();
-    paused = false;
     dynamicLanguage.onResume(this);
     if (recipient != null) recipient.addListener(this);
     initializeMedia();
@@ -130,7 +118,6 @@ public class MediaPreviewActivity extends PassphraseRequiredActionBarActivity im
   @Override
   public void onPause() {
     super.onPause();
-    paused = true;
     if (recipient != null) recipient.removeListener(this);
     cleanupMedia();
   }
@@ -145,9 +132,7 @@ public class MediaPreviewActivity extends PassphraseRequiredActionBarActivity im
   }
 
   private void initializeViews() {
-    errorText     = (TextView)  findViewById(R.id.error);
+    image = (ZoomingImageView)findViewById(R.id.image);
-    image         = (ImageView) findViewById(R.id.image);
-    imageAttacher = new PhotoViewAttacher(image);
   }
 
   private void initializeResources() {
@@ -175,7 +160,7 @@ public class MediaPreviewActivity extends PassphraseRequiredActionBarActivity im
     Log.w(TAG, "Loading Part URI: " + mediaUri);
 
     if (mediaType != null && mediaType.startsWith("image/")) {
-      displayImage();
+      image.setImageUri(masterSecret, mediaUri);
     }
   }
 
@@ -187,42 +172,6 @@ public class MediaPreviewActivity extends PassphraseRequiredActionBarActivity im
     }
   }
 
-  private void displayImage() {
-    new AsyncTask<Void,Void,Bitmap>() {
-      @Override
-      protected Bitmap doInBackground(Void... params) {
-        try {
-          int[] maxTextureSizeParams = new int[1];
-          GLES20.glGetIntegerv(GLES20.GL_MAX_TEXTURE_SIZE, maxTextureSizeParams, 0);
-          int maxTextureSize = Math.max(maxTextureSizeParams[0], 2048);
-          Log.w(TAG, "reported GL_MAX_TEXTURE_SIZE: " + maxTextureSize);
-          return BitmapUtil.createScaledBitmap(MediaPreviewActivity.this, masterSecret, mediaUri,
-                                               maxTextureSize, maxTextureSize);
-        } catch (IOException | BitmapDecodingException e) {
-          return null;
-        }
-      }
-
-      @Override
-      protected void onPostExecute(Bitmap bitmap) {
-        if (paused) {
-          if (bitmap != null) bitmap.recycle();
-          return;
-        }
-
-        if (bitmap == null) {
-          errorText.setText(R.string.MediaPreviewActivity_cant_display);
-          errorText.setVisibility(View.VISIBLE);
-        } else {
-          MediaPreviewActivity.this.bitmap = bitmap;
-          image.setImageBitmap(bitmap);
-          image.setVisibility(View.VISIBLE);
-          imageAttacher.update();
-        }
-      }
-    }.execute();
-  }
-
   private void saveToDisk() {
     SaveAttachmentTask.showWarningDialog(this, new DialogInterface.OnClickListener() {
       @Override

src/org/thoughtcrime/securesms/components/ZoomingImageView.java

@@ -0,0 +1,45 @@
+package org.thoughtcrime.securesms.components;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.net.Uri;
+import android.util.AttributeSet;
+import android.widget.ImageView;
+
+import com.bumptech.glide.Glide;
+import com.bumptech.glide.request.target.BitmapImageViewTarget;
+
+import org.thoughtcrime.securesms.crypto.MasterSecret;
+import org.thoughtcrime.securesms.mms.DecryptableStreamUriLoader.DecryptableUri;
+
+import uk.co.senab.photoview.PhotoViewAttacher;
+
+public class ZoomingImageView extends ImageView {
+  private PhotoViewAttacher attacher = new PhotoViewAttacher(this);
+
+  public ZoomingImageView(Context context) {
+    super(context);
+  }
+
+  public ZoomingImageView(Context context, AttributeSet attrs) {
+    super(context, attrs);
+  }
+
+  public ZoomingImageView(Context context, AttributeSet attrs, int defStyleAttr) {
+    super(context, attrs, defStyleAttr);
+  }
+
+  public void setImageUri(MasterSecret masterSecret, Uri uri) {
+    Glide.with(getContext())
+         .load(new DecryptableUri(masterSecret, uri))
+         .asBitmap()
+         .dontTransform()
+         .dontAnimate()
+         .into(new BitmapImageViewTarget(this) {
+           @Override protected void setResource(Bitmap resource) {
+             super.setResource(resource);
+             attacher.update();
+           }
+         });
+  }
+}