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Add instruction video to Screen Magnification a.k.a. Tap to Zoom screen.

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Change-Id: Id02796ea44e48fe04351c9ea6bda66526f77a5cf
This commit is contained in:
Noah Wang
2016-01-20 20:47:21 -08:00
parent 802d22e159
commit c14ed74482
6 changed files with 171 additions and 3 deletions
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31
res/drawable/accessibility_screen_magnification_background.xml Normal file
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@@ -0,0 +1,31 @@
<!--
~ Copyright (C) 2016 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
-->
<vector xmlns:android="http://schemas.android.com/apk/res/android"
android:width="360dp"
android:height="184dp"
android:viewportWidth="360"
android:viewportHeight="184">
<path
android:fillColor="#E9F0F9"
android:pathData="M 0 0 H 360 V 184 H 0 V 0 Z" />
<path
android:fillColor="#444445"
android:pathData="M217.6,179h-75.1c-5,0-9-4-9-9V14c0-5,4-9,9-9h75.1c5,0,9,4,9,9V170C226.6,174.9,222.5,179,217.6,179z" />
<path
android:fillColor="#000000"
android:pathData="M 180 9.6 C 181.1045695 9.6 182 10.4954305003 182 11.6 C 182 12.7045694997 181.1045695 13.6 180 13.6 C 178.8954305 13.6 178 12.7045694997 178 11.6 C 178 10.4954305003 178.8954305 9.6 180 9.6 Z" />
</vector>

3
res/layout/text_description_preference.xml
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@@ -13,11 +13,10 @@
See the License for the specific language governing permissions and
limitations under the License.
-->
<TextView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/summary"
android:layout_width="fill_parent"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textAppearance="@android:style/TextAppearance.Material.Body1"
android:padding="16dip" />

27
res/layout/video_preference.xml Normal file
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@@ -0,0 +1,27 @@
<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2016 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.
-->
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/video_background"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<VideoView
android:id="@+id/video"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>

BIN
res/raw/accessibility_screen_magnification.mp4 Normal file
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Binary file not shown.

7
res/values/dimens.xml
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@@ -268,4 +268,11 @@
<!-- Accessibility, Font size -->
<dimen name="font_size_preview_height">240dp</dimen>
<!-- Accessibility, Screen magnification. These values are meant to be relative values and the actual layout value will be set programmatically. -->
<dimen name="screen_magnification_video_background_width">750dp</dimen>
<dimen name="screen_magnification_video_background_height">383dp</dimen>
<dimen name="screen_magnification_video_width">170dp</dimen>
<dimen name="screen_magnification_video_height">311dp</dimen>
<dimen name="screen_magnification_video_margin_top">40dp</dimen>
</resources>

104
src/com/android/settings/accessibility/ToggleScreenMagnificationPreferenceFragment.java
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@@ -16,15 +16,111 @@
package com.android.settings.accessibility;
import android.content.ContentResolver;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Point;
import android.os.Bundle;
import android.provider.Settings;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnPreparedListener;
import android.net.Uri;
import android.support.v7.preference.Preference;
import android.support.v7.preference.PreferenceScreen;
import android.support.v7.preference.PreferenceViewHolder;
import android.view.Display;
import android.view.Gravity;
import android.view.WindowManager;
import android.widget.MediaController;
import android.widget.RelativeLayout;
import android.widget.VideoView;
import com.android.internal.logging.MetricsProto.MetricsEvent;
import com.android.settings.R;
import com.android.settings.widget.ToggleSwitch;
import com.android.settings.widget.ToggleSwitch.OnBeforeCheckedChangeListener;
public class ToggleScreenMagnificationPreferenceFragment
extends ToggleFeaturePreferenceFragment {
protected class VideoPreference extends Preference {
public VideoPreference(Context context) {
super(context);
}
@Override
public void onBindViewHolder(PreferenceViewHolder view) {
super.onBindViewHolder(view);
view.setDividerAllowedAbove(false);
view.setDividerAllowedBelow(false);
final RelativeLayout background =
(RelativeLayout) view.findViewById(R.id.video_background);
final VideoView videoView = (VideoView) view.findViewById(R.id.video);
// Hacky adjustment for using VideoView in recycle view and positioning
// it on the background image
Resources res = getPrefContext().getResources();
final int backgroundWidth = res.getDimensionPixelSize(
R.dimen.screen_magnification_video_background_width);
final int backgroundHeight = res.getDimensionPixelSize(
R.dimen.screen_magnification_video_background_height);
final int videoWidth = res.getDimensionPixelSize(
R.dimen.screen_magnification_video_width);
final int videoHeight = res.getDimensionPixelSize(
R.dimen.screen_magnification_video_height);
final int videoMarginTop = res.getDimensionPixelSize(
R.dimen.screen_magnification_video_margin_top);
final int screenWidth = getScreenWidth(getPrefContext());
RelativeLayout.LayoutParams videoLp = new RelativeLayout.LayoutParams(
screenWidth * videoWidth / backgroundWidth,
screenWidth * videoHeight / backgroundWidth);
videoLp.setMargins(0, screenWidth * videoMarginTop / backgroundWidth, 0, 0);
videoView.setLayoutParams(videoLp);
RelativeLayout.LayoutParams backgroundLp = new RelativeLayout.LayoutParams(
screenWidth,
screenWidth * backgroundHeight / backgroundWidth);
background.setLayoutParams(backgroundLp);
background.setBackgroundResource(
R.drawable.accessibility_screen_magnification_background);
background.setGravity(Gravity.CENTER_HORIZONTAL);
// Loop the video.
videoView.setOnPreparedListener(new OnPreparedListener() {
@Override
public void onPrepared(MediaPlayer mediaPlayer) {
mediaPlayer.setLooping(true);
}
});
videoView.setVideoURI(Uri.parse(String.format("%s://%s/%s",
ContentResolver.SCHEME_ANDROID_RESOURCE,
getPrefContext().getPackageName(),
R.raw.accessibility_screen_magnification)));
videoView.setMediaController(new MediaController(getPrefContext()));
videoView.start();
}
}
protected VideoPreference mVideoPreference;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mVideoPreference = new VideoPreference(getPrefContext());
mVideoPreference.setSelectable(false);
mVideoPreference.setPersistent(false);
mVideoPreference.setLayoutResource(R.layout.video_preference);
final PreferenceScreen preferenceScreen = getPreferenceManager().getPreferenceScreen();
preferenceScreen.setOrderingAsAdded(false);
mVideoPreference.setOrder(0);
mSummaryPreference.setOrder(1);
preferenceScreen.addPreference(mVideoPreference);
}
@Override
protected void onPreferenceToggled(String preferenceKey, boolean enabled) {
// Do nothing.
@@ -72,4 +168,12 @@ public class ToggleScreenMagnificationPreferenceFragment
protected int getMetricsCategory() {
return MetricsEvent.ACCESSIBILITY_TOGGLE_SCREEN_MAGNIFICATION;
}
private static int getScreenWidth(Context context) {
WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
Display display = wm.getDefaultDisplay();
Point size = new Point();
display.getSize(size);
return size.x;
}
}