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Adding settings screen for font size. Also factored out common

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components from screen magnification settings screen.

Change-Id: I1828c7c0246f14493903172f2da7419fdc8e5f09
This commit is contained in:
Noah Wang
2015-12-15 09:05:30 -08:00
parent a164305d4d
commit e64cc267e7
12 changed files with 483 additions and 177 deletions
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182
src/com/android/settings/display/ScreenZoomSettings.java
View File

@@ -18,7 +18,7 @@ package com.android.settings.display;
import com.android.settings.InstrumentedFragment;
import com.android.settings.R;
import com.android.settings.SettingsPreferenceFragment;
import com.android.settings.PreviewSeekBarPreferenceFragment;
import com.android.settings.search.BaseSearchIndexProvider;
import com.android.settings.search.Indexable;
import com.android.settings.search.SearchIndexableRaw;
@@ -29,17 +29,6 @@ import android.content.res.Configuration;
import android.content.res.Resources;
import android.os.Bundle;
import android.view.Display;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.animation.AccelerateInterpolator;
import android.view.animation.DecelerateInterpolator;
import android.view.animation.Interpolator;
import android.widget.FrameLayout;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
@@ -47,32 +36,17 @@ import java.util.List;
/**
* Preference fragment used to control screen zoom.
*/
public class ScreenZoomSettings extends SettingsPreferenceFragment implements Indexable {
/** Duration to use when cross-fading between previews. */
private static final long CROSS_FADE_DURATION_MS = 400;
public class ScreenZoomSettings extends PreviewSeekBarPreferenceFragment implements Indexable {
/** Interpolator to use when cross-fading between previews. */
private static final Interpolator FADE_IN_INTERPOLATOR = new DecelerateInterpolator();
/** Interpolator to use when cross-fading between previews. */
private static final Interpolator FADE_OUT_INTERPOLATOR = new AccelerateInterpolator();
private ViewGroup mPreviewFrame;
private TextView mLabel;
private View mLarger;
private View mSmaller;
private String[] mEntries;
private int[] mValues;
private int mNormalDensity;
private int mInitialIndex;
private int mCurrentIndex;
private int[] mValues;
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mActivityLayoutResId = R.layout.screen_zoom_activity;
mPreviewSampleResId = R.layout.screen_zoom_preview;
final DisplayDensityUtils density = new DisplayDensityUtils(getContext());
final int initialIndex = density.getCurrentIndex();
@@ -94,152 +68,18 @@ public class ScreenZoomSettings extends SettingsPreferenceFragment implements In
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View root = super.onCreateView(inflater, container, savedInstanceState);
final ViewGroup list_container = (ViewGroup) root.findViewById(android.R.id.list_container);
list_container.removeAllViews();
final View content = inflater.inflate(R.layout.screen_zoom_activity, list_container, false);
list_container.addView(content);
mLabel = (TextView) content.findViewById(R.id.current_density);
// The maximum SeekBar value always needs to be non-zero. If there's
// only one available zoom level, we'll handle this by disabling the
// seek bar.
final int max = Math.max(1, mValues.length - 1);
final SeekBar seekBar = (SeekBar) content.findViewById(R.id.seek_bar);
seekBar.setMax(max);
seekBar.setProgress(mInitialIndex);
seekBar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
setPreviewLayer(progress, true);
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {}
});
mSmaller = content.findViewById(R.id.smaller);
mSmaller.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
final int progress = seekBar.getProgress();
if (progress > 0) {
seekBar.setProgress(progress - 1, true);
}
}
});
mLarger = content.findViewById(R.id.larger);
mLarger.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
final int progress = seekBar.getProgress();
if (progress < seekBar.getMax()) {
seekBar.setProgress(progress + 1, true);
}
}
});
if (mValues.length == 1) {
// The larger and smaller buttons will be disabled when we call
// setPreviewLayer() later in this method.
seekBar.setEnabled(false);
}
mPreviewFrame = (FrameLayout) content.findViewById(R.id.preview_frame);
protected Configuration createConfig(Configuration origConfig, int index) {
// Populate the sample layouts.
final Context context = getContext();
final Configuration origConfig = context.getResources().getConfiguration();
for (int mValue : mValues) {
final Configuration config = new Configuration(origConfig);
config.densityDpi = mValue;
// Create a new configuration for the specified density. It won't
// have any theme set, so manually apply the current theme.
final Context configContext = context.createConfigurationContext(config);
configContext.setTheme(context.getThemeResId());
final LayoutInflater configInflater = LayoutInflater.from(configContext);
final View sampleView = configInflater.inflate(
R.layout.screen_zoom_preview, mPreviewFrame, false);
sampleView.setAlpha(0);
sampleView.setVisibility(View.INVISIBLE);
mPreviewFrame.addView(sampleView);
}
setPreviewLayer(mInitialIndex, false);
return root;
}
@Override
public void onDetach() {
super.onDetach();
// This will adjust the density SLIGHTLY after the activity has
// finished, which could be considered a feature or a bug...
commit();
}
private void setPreviewLayer(int index, boolean animate) {
mLabel.setText(mEntries[index]);
if (mCurrentIndex >= 0) {
final View lastLayer = mPreviewFrame.getChildAt(mCurrentIndex);
if (animate) {
lastLayer.animate()
.alpha(0)
.setInterpolator(FADE_OUT_INTERPOLATOR)
.setDuration(CROSS_FADE_DURATION_MS)
.withEndAction(new Runnable() {
@Override
public void run() {
lastLayer.setVisibility(View.INVISIBLE);
}
});
} else {
lastLayer.setAlpha(0);
lastLayer.setVisibility(View.INVISIBLE);
}
}
final View nextLayer = mPreviewFrame.getChildAt(index);
if (animate) {
nextLayer.animate()
.alpha(1)
.setInterpolator(FADE_IN_INTERPOLATOR)
.setDuration(CROSS_FADE_DURATION_MS)
.withStartAction(new Runnable() {
@Override
public void run() {
nextLayer.setVisibility(View.VISIBLE);
}
});
} else {
nextLayer.setVisibility(View.VISIBLE);
nextLayer.setAlpha(1);
}
mSmaller.setEnabled(index > 0);
mLarger.setEnabled(index < mEntries.length - 1);
mCurrentIndex = index;
final Configuration config = new Configuration(origConfig);
config.densityDpi = mValues[index];
return config;
}
/**
* Persists the selected density and sends a configuration change.
*/
private void commit() {
@Override
protected void commit() {
final int densityDpi = mValues[mCurrentIndex];
if (densityDpi == mNormalDensity) {
DisplayDensityUtils.clearForcedDisplayDensity(Display.DEFAULT_DISPLAY);