/*

* Copyright (C) 2015 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.display;

import android.annotation.Nullable;

import android.content.Context;

import android.content.res.Configuration;

import android.content.res.Resources;

import android.os.Bundle;

import android.view.Display;

import com.android.internal.logging.nano.MetricsProto.MetricsEvent;

import com.android.settings.PreviewSeekBarPreferenceFragment;

import com.android.settings.R;

import com.android.settings.search.BaseSearchIndexProvider;

import com.android.settings.search.Indexable;

import com.android.settings.search.SearchIndexableRaw;

import com.android.settingslib.display.DisplayDensityUtils;

import java.util.ArrayList;

import java.util.List;

/**

* Preference fragment used to control screen zoom.

*/

public class ScreenZoomSettings extends PreviewSeekBarPreferenceFragment implements Indexable {

private int mDefaultDensity;

private int[] mValues;

@Override

public void onCreate(@Nullable Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

mActivityLayoutResId = R.layout.screen_zoom_activity;

// This should be replaced once the final preview sample screen is in place.

mPreviewSampleResIds = new int[] {R.layout.screen_zoom_preview_1,

R.layout.screen_zoom_preview_2,

R.layout.screen_zoom_preview_settings};

final DisplayDensityUtils density = new DisplayDensityUtils(getContext());

final int initialIndex = density.getCurrentIndex();

if (initialIndex < 0) {

// Failed to obtain default density, which means we failed to

// connect to the window manager service. Just use the current

// density and don't let the user change anything.

final int densityDpi = getResources().getDisplayMetrics().densityDpi;

mValues = new int[] {densityDpi};

mEntries = new String[] {getString(DisplayDensityUtils.SUMMARY_DEFAULT)};

mInitialIndex = 0;

mDefaultDensity = densityDpi;

} else {

mValues = density.getValues();

mEntries = density.getEntries();

mInitialIndex = initialIndex;

mDefaultDensity = density.getDefaultDensity();

}

getActivity().setTitle(R.string.screen_zoom_title);

}

@Override

protected Configuration createConfig(Configuration origConfig, int index) {

// Populate the sample layouts.

final Configuration config = new Configuration(origConfig);

config.densityDpi = mValues[index];

return config;

}

/**

* Persists the selected density and sends a configuration change.

*/

@Override

protected void commit() {

final int densityDpi = mValues[mCurrentIndex];

if (densityDpi == mDefaultDensity) {

DisplayDensityUtils.clearForcedDisplayDensity(Display.DEFAULT_DISPLAY);

} else {

DisplayDensityUtils.setForcedDisplayDensity(Display.DEFAULT_DISPLAY, densityDpi);

}

}

@Override

public int getHelpResource() {

return R.string.help_url_display_size;

}

@Override

public int getMetricsCategory() {

return MetricsEvent.DISPLAY_SCREEN_ZOOM;

}

/** Index provider used to expose this fragment in search. */

public static final SearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =

new BaseSearchIndexProvider() {

@Override

public ListgetRawDataToIndex(Context context,

boolean enabled) {

final Resources res = context.getResources();

final SearchIndexableRaw data = new SearchIndexableRaw(context);

data.title = res.getString(R.string.screen_zoom_title);

data.key = "screen_zoom_settings";

data.screenTitle = res.getString(R.string.screen_zoom_title);

data.keywords = res.getString(R.string.screen_zoom_keywords);

final Listresult = new ArrayList<>(1);

result.add(data);

return result;

}

};

}

Java程序

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128行

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4.71 KB

/*

* Copyright (C) 2015 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.display;

import android.annotation.Nullable;

import android.content.Context;

import android.content.res.Configuration;

import android.content.res.Resources;

import android.os.Bundle;

import android.view.Display;

import com.android.internal.logging.nano.MetricsProto.MetricsEvent;

import com.android.settings.PreviewSeekBarPreferenceFragment;

import com.android.settings.R;

import com.android.settings.search.BaseSearchIndexProvider;

import com.android.settings.search.Indexable;

import com.android.settings.search.SearchIndexableRaw;

import com.android.settingslib.display.DisplayDensityUtils;

import java.util.ArrayList;

import java.util.List;

/**

* Preference fragment used to control screen zoom.

*/

public class ScreenZoomSettings extends PreviewSeekBarPreferenceFragment implements Indexable {

private int mDefaultDensity;

private int[] mValues;

@Override

public void onCreate(@Nullable Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

mActivityLayoutResId = R.layout.screen_zoom_activity;

// This should be replaced once the final preview sample screen is in place.

mPreviewSampleResIds = new int[] {R.layout.screen_zoom_preview_1,

R.layout.screen_zoom_preview_2,

R.layout.screen_zoom_preview_settings};

final DisplayDensityUtils density = new DisplayDensityUtils(getContext());

final int initialIndex = density.getCurrentIndex();

if (initialIndex < 0) {

// Failed to obtain default density, which means we failed to

// connect to the window manager service. Just use the current

// density and don't let the user change anything.

final int densityDpi = getResources().getDisplayMetrics().densityDpi;

mValues = new int[] {densityDpi};

mEntries = new String[] {getString(DisplayDensityUtils.SUMMARY_DEFAULT)};

mInitialIndex = 0;

mDefaultDensity = densityDpi;

} else {

mValues = density.getValues();

mEntries = density.getEntries();

mInitialIndex = initialIndex;

mDefaultDensity = density.getDefaultDensity();

}

getActivity().setTitle(R.string.screen_zoom_title);

}

@Override

protected Configuration createConfig(Configuration origConfig, int index) {

// Populate the sample layouts.

final Configuration config = new Configuration(origConfig);

config.densityDpi = mValues[index];

return config;

}

/**

* Persists the selected density and sends a configuration change.

*/

@Override

protected void commit() {

final int densityDpi = mValues[mCurrentIndex];

if (densityDpi == mDefaultDensity) {

DisplayDensityUtils.clearForcedDisplayDensity(Display.DEFAULT_DISPLAY);

} else {

DisplayDensityUtils.setForcedDisplayDensity(Display.DEFAULT_DISPLAY, densityDpi);

}

}

@Override

public int getHelpResource() {

return R.string.help_url_display_size;

}

@Override

public int getMetricsCategory() {

return MetricsEvent.DISPLAY_SCREEN_ZOOM;

}

/** Index provider used to expose this fragment in search. */

public static final SearchIndexProvider SEARCH_INDEX_DATA_PROVIDER =

new BaseSearchIndexProvider() {

@Override

public List getRawDataToIndex(Context context,

boolean enabled) {

final Resources res = context.getResources();

final SearchIndexableRaw data = new SearchIndexableRaw(context);

data.title = res.getString(R.string.screen_zoom_title);

data.key = "screen_zoom_settings";

data.screenTitle = res.getString(R.string.screen_zoom_title);

data.keywords = res.getString(R.string.screen_zoom_keywords);

final List result = new ArrayList<>(1);

result.add(data);

return result;

}

};

}