Implement Settings UI for Screen zoom preference
Also cleans up unnecessary 0s and moves tint to the proper place in relevant vector drawable XML files. Preview layout is still WIP pending UX input, but I wanted to get this CL in place so that we can test/demo the feature ASAP. Bug: 22450672 Change-Id: Ic3f1500006c763df99fba2d1d16782b89d6fcae1
This commit is contained in:
Alan Viverette
272
src/com/android/settings/display/ScreenZoomSettings.java
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272
src/com/android/settings/display/ScreenZoomSettings.java
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/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.settings.display;
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import com.android.settings.InstrumentedFragment;
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import com.android.settings.R;
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import com.android.settings.SettingsPreferenceFragment;
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import com.android.settings.search.BaseSearchIndexProvider;
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import com.android.settings.search.Indexable;
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import com.android.settings.search.SearchIndexableRaw;
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import android.annotation.Nullable;
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import android.content.Context;
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import android.content.res.Configuration;
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import android.content.res.Resources;
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import android.os.Bundle;
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import android.view.Display;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.View.OnClickListener;
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import android.view.ViewGroup;
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import android.view.animation.AccelerateInterpolator;
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import android.view.animation.DecelerateInterpolator;
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import android.view.animation.Interpolator;
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import android.widget.FrameLayout;
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import android.widget.SeekBar;
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import android.widget.SeekBar.OnSeekBarChangeListener;
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import android.widget.TextView;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* Preference fragment used to control screen zoom.
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*/
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public class ScreenZoomSettings extends SettingsPreferenceFragment implements Indexable {
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/** Duration to use when cross-fading between previews. */
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private static final long CROSS_FADE_DURATION_MS = 400;
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/** Interpolator to use when cross-fading between previews. */
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private static final Interpolator FADE_IN_INTERPOLATOR = new DecelerateInterpolator();
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/** Interpolator to use when cross-fading between previews. */
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private static final Interpolator FADE_OUT_INTERPOLATOR = new AccelerateInterpolator();
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private ViewGroup mPreviewFrame;
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private TextView mLabel;
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private View mLarger;
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private View mSmaller;
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private String[] mEntries;
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private int[] mValues;
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private int mNormalDensity;
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private int mInitialIndex;
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private int mCurrentIndex;
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@Override
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public void onCreate(@Nullable Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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final DisplayDensityUtils density = new DisplayDensityUtils(getContext());
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final int initialIndex = density.getCurrentIndex();
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if (initialIndex < 0) {
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// Failed to obtain normal density, which means we failed to
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// connect to the window manager service. Just use the current
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// density and don't let the user change anything.
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final int densityDpi = getResources().getDisplayMetrics().densityDpi;
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mValues = new int[] { densityDpi };
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mEntries = new String[] { getString(R.string.screen_zoom_summary_normal) };
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mInitialIndex = 0;
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mNormalDensity = densityDpi;
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} else {
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mValues = density.getValues();
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mEntries = density.getEntries();
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mInitialIndex = initialIndex;
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mNormalDensity = density.getNormalDensity();
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}
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}
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@Override
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public View onCreateView(LayoutInflater inflater, ViewGroup container,
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Bundle savedInstanceState) {
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final View root = super.onCreateView(inflater, container, savedInstanceState);
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final ViewGroup list_container = (ViewGroup) root.findViewById(android.R.id.list_container);
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list_container.removeAllViews();
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final View content = inflater.inflate(R.layout.screen_zoom_activity, list_container, false);
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list_container.addView(content);
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mLabel = (TextView) content.findViewById(R.id.current_density);
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// The maximum SeekBar value always needs to be non-zero. If there's
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// only one available zoom level, we'll handle this by disabling the
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// seek bar.
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final int max = Math.max(1, mValues.length - 1);
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final SeekBar seekBar = (SeekBar) content.findViewById(R.id.seek_bar);
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seekBar.setMax(max);
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seekBar.setProgress(mInitialIndex);
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seekBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
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@Override
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public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
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setPreviewLayer(progress, true);
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}
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@Override
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public void onStartTrackingTouch(SeekBar seekBar) {}
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@Override
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public void onStopTrackingTouch(SeekBar seekBar) {}
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});
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mSmaller = content.findViewById(R.id.smaller);
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mSmaller.setOnClickListener(new OnClickListener() {
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@Override
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public void onClick(View v) {
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final int progress = seekBar.getProgress();
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if (progress > 0) {
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seekBar.setProgress(progress - 1, true);
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}
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}
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});
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mLarger = content.findViewById(R.id.larger);
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mLarger.setOnClickListener(new OnClickListener() {
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@Override
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public void onClick(View v) {
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final int progress = seekBar.getProgress();
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if (progress < seekBar.getMax()) {
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seekBar.setProgress(progress + 1, true);
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}
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}
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});
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if (mValues.length == 1) {
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// The larger and smaller buttons will be disabled when we call
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// setPreviewLayer() later in this method.
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seekBar.setEnabled(false);
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}
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mPreviewFrame = (FrameLayout) content.findViewById(R.id.preview_frame);
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// Populate the sample layouts.
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final Context context = getContext();
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final Configuration origConfig = context.getResources().getConfiguration();
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for (int mValue : mValues) {
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final Configuration config = new Configuration(origConfig);
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config.densityDpi = mValue;
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// Create a new configuration for the specified density. It won't
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// have any theme set, so manually apply the current theme.
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final Context configContext = context.createConfigurationContext(config);
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configContext.setTheme(context.getThemeResId());
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final LayoutInflater configInflater = LayoutInflater.from(configContext);
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final View sampleView = configInflater.inflate(
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R.layout.screen_zoom_preview, mPreviewFrame, false);
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sampleView.setAlpha(0);
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sampleView.setVisibility(View.INVISIBLE);
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mPreviewFrame.addView(sampleView);
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}
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setPreviewLayer(mInitialIndex, false);
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return root;
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}
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@Override
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public void onDetach() {
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super.onDetach();
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// This will adjust the density SLIGHTLY after the activity has
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// finished, which could be considered a feature or a bug...
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commit();
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}
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private void setPreviewLayer(int index, boolean animate) {
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mLabel.setText(mEntries[index]);
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if (mCurrentIndex >= 0) {
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final View lastLayer = mPreviewFrame.getChildAt(mCurrentIndex);
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if (animate) {
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lastLayer.animate()
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.alpha(0)
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.setInterpolator(FADE_OUT_INTERPOLATOR)
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.setDuration(CROSS_FADE_DURATION_MS)
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.withEndAction(new Runnable() {
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@Override
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public void run() {
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lastLayer.setVisibility(View.INVISIBLE);
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}
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});
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} else {
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lastLayer.setAlpha(0);
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lastLayer.setVisibility(View.INVISIBLE);
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}
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}
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final View nextLayer = mPreviewFrame.getChildAt(index);
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if (animate) {
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nextLayer.animate()
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.alpha(1)
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.setInterpolator(FADE_IN_INTERPOLATOR)
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.setDuration(CROSS_FADE_DURATION_MS)
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.withStartAction(new Runnable() {
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@Override
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public void run() {
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nextLayer.setVisibility(View.VISIBLE);
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}
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});
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} else {
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nextLayer.setVisibility(View.VISIBLE);
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nextLayer.setAlpha(1);
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}
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mSmaller.setEnabled(index > 0);
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mLarger.setEnabled(index < mEntries.length - 1);
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mCurrentIndex = index;
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}
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/**
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* Persists the selected density and sends a configuration change.
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*/
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private void commit() {
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final int densityDpi = mValues[mCurrentIndex];
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if (densityDpi == mNormalDensity) {
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DisplayDensityUtils.clearForcedDisplayDensity(Display.DEFAULT_DISPLAY);
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} else {
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DisplayDensityUtils.setForcedDisplayDensity(Display.DEFAULT_DISPLAY, densityDpi);
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}
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}
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@Override
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protected int getMetricsCategory() {
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return InstrumentedFragment.DISPLAY_SCREEN_ZOOM;
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}
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/** Index provider used to expose this fragment in search. */
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public static final SearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =
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new BaseSearchIndexProvider() {
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@Override
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public List<SearchIndexableRaw> getRawDataToIndex(Context context, boolean enabled) {
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final Resources res = context.getResources();
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final SearchIndexableRaw data = new SearchIndexableRaw(context);
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data.title = res.getString(R.string.screen_zoom_title);
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data.screenTitle = res.getString(R.string.screen_zoom_title);
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data.keywords = res.getString(R.string.screen_zoom_keywords);
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final List<SearchIndexableRaw> result = new ArrayList<>(1);
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result.add(data);
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return result;
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}
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};
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}
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Reference in New Issue
Block a user