Support the rich content for accessibility service (1/n)

Goal: 1. let third party developer can use html text that include from their local image file and animated image instead of only plain text to rich their content. 2. Avoid malicious links made by third party developer Action: 1. Add html, static text, and animated image preferences. 2. Add android:AnimatedImageDrawable, and android:htmlDescription attributes. 3. Fine-tune interface and integration 4. Add custom tag filter Bug: 136292241 Test: Maunal & make RunSettingsRoboTests Change-Id: I82cd5319efb7faa1ff7e8354a279828fce5135b8
2019-10-31 11:45:16 +08:00
parent d7ba70ee54
commit 64f1374c64
11 changed files with 555 additions and 10 deletions
--- a/src/com/android/settings/accessibility/AnimatedImagePreference.java
+++ b/src/com/android/settings/accessibility/AnimatedImagePreference.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.accessibility;
+
+import android.content.Context;
+import android.graphics.drawable.AnimatedImageDrawable;
+import android.graphics.drawable.Drawable;
+import android.net.Uri;
+import android.widget.ImageView;
+
+import androidx.preference.Preference;
+import androidx.preference.PreferenceViewHolder;
+
+import com.android.settings.R;
+
+/**
+ * A custom {@link ImageView} preference for showing animated or static image, such as <a
+ * href="https://developers.google.com/speed/webp/">animated webp</a> and static png.
+ */
+public class AnimatedImagePreference extends Preference {
+
+    private boolean mDividerAllowedAbove = false;
+    private Uri mImageUri;
+
+    AnimatedImagePreference(Context context) {
+        super(context);
+        setLayoutResource(R.layout.preference_animated_image);
+    }
+
+    @Override
+    public void onBindViewHolder(PreferenceViewHolder holder) {
+        super.onBindViewHolder(holder);
+        holder.setDividerAllowedAbove(mDividerAllowedAbove);
+
+        final ImageView imageView = holder.itemView.findViewById(R.id.animated_img);
+        if (imageView != null && mImageUri != null) {
+            imageView.setImageURI(mImageUri);
+
+            final Drawable drawable = imageView.getDrawable();
+            if (drawable != null) {
+                if (drawable instanceof AnimatedImageDrawable) {
+                    ((AnimatedImageDrawable) drawable).start();
+                }
+            }
+        }
+    }
+
+    /**
+     * Sets divider whether to show in preference above.
+     *
+     * @param allowed true will be drawn on above this item
+     */
+    public void setDividerAllowedAbove(boolean allowed) {
+        if (allowed != mDividerAllowedAbove) {
+            mDividerAllowedAbove = allowed;
+            notifyChanged();
+        }
+    }
+
+    /**
+     * Set image uri to display image in {@link ImageView}
+     *
+     * @param imageUri the Uri of an image
+     */
+    public void setImageUri(Uri imageUri) {
+        if (imageUri != null && !imageUri.equals(mImageUri)) {
+            mImageUri = imageUri;
+            notifyChanged();
+        }
+    }
+}