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Add font size preference.

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Shamelessly stolen from SpareParts.

Change-Id: I5bcdc5c738a0b2af7e7bd8dae303997c28298086
This commit is contained in:
Dianne Hackborn
2011-03-04 17:30:54 -08:00
parent 4f25e1d5e3
commit 6677e56f45
4 changed files with 79 additions and 0 deletions
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20
res/values/arrays.xml
View File

@@ -137,6 +137,26 @@
<item>1800000</item>
</string-array>
<string-array name="entries_font_size">
<item>Extremely Small</item>
<item>Extra Small</item>
<item>Small</item>
<item>Normal</item>
<item>Large</item>
<item>Extra Large</item>
<item>Extremely Large</item>
</string-array>
<string-array name="entryvalues_font_size">
<item>0.70</item>
<item>0.85</item>
<item>0.95</item>
<item>1.0</item>
<item>1.05</item>
<item>1.15</item>
<item>1.30</item>
</string-array>
<!-- TTS settings -->
<!-- Default speech rate choices -->

6
res/values/strings.xml
View File

@@ -1432,6 +1432,12 @@
<string name="screen_timeout_summary">Screen turns off automatically after <xliff:g id="timeout_description">%1$s</xliff:g></string>
<!-- Sound & display settings screen, setting option name to change whether the screen adjusts automatically based on lighting conditions -->
<string name="automatic_brightness">Automatic brightness</string>
<!-- [CHAR LIMIT=30] Sound & display settings screen, setting option name to change font size -->
<string name="title_font_size">Font size</string>
<!-- [CHAR LIMIT=40] Sound & display settings screen, setting option summary to change font size -->
<string name="summary_font_size">Overall size of fonts</string>
<!-- [CHAR LIMIT=40] Sound & display settings screen, title of dialog for picking font size -->
<string name="dialog_title_font_size">Select font size</string>
<!-- SIM lock settings title -->
<string name="sim_lock_settings">SIM card lock settings</string>

9
res/xml/display_settings.xml
View File

@@ -41,4 +41,13 @@
android:persistent="false"
android:entries="@array/screen_timeout_entries"
android:entryValues="@array/screen_timeout_values" />
<ListPreference
android:key="font_size"
android:title="@string/title_font_size"
android:summary="@string/summary_font_size"
android:entries="@array/entries_font_size"
android:entryValues="@array/entryvalues_font_size"
android:dialogTitle="@string/dialog_title_font_size" />
</PreferenceScreen>

44
src/com/android/settings/DisplaySettings.java
View File

@@ -18,9 +18,11 @@ package com.android.settings;
import static android.provider.Settings.System.SCREEN_OFF_TIMEOUT;
import android.app.ActivityManagerNative;
import android.app.admin.DevicePolicyManager;
import android.content.ContentResolver;
import android.content.Context;
import android.content.res.Configuration;
import android.database.ContentObserver;
import android.os.Bundle;
import android.os.Handler;
@@ -46,10 +48,14 @@ public class DisplaySettings extends SettingsPreferenceFragment implements
private static final String KEY_SCREEN_TIMEOUT = "screen_timeout";
private static final String KEY_ANIMATIONS = "animations";
private static final String KEY_ACCELEROMETER = "accelerometer";
private static final String KEY_FONT_SIZE = "font_size";
private ListPreference mAnimations;
private CheckBoxPreference mAccelerometer;
private float[] mAnimationScales;
private ListPreference mFontSizePref;
private final Configuration mCurConfig = new Configuration();
private IWindowManager mWindowManager;
@@ -82,6 +88,9 @@ public class DisplaySettings extends SettingsPreferenceFragment implements
mScreenTimeoutPreference.setOnPreferenceChangeListener(this);
disableUnusableTimeouts(mScreenTimeoutPreference);
updateTimeoutPreferenceDescription(resolver, currentTimeout);
mFontSizePref = (ListPreference) findPreference(KEY_FONT_SIZE);
mFontSizePref.setOnPreferenceChangeListener(this);
}
private void updateTimeoutPreferenceDescription(ContentResolver resolver, long currentTimeout) {
@@ -135,6 +144,29 @@ public class DisplaySettings extends SettingsPreferenceFragment implements
screenTimeoutPreference.setEnabled(revisedEntries.size() > 0);
}
int floatToIndex(float val, int resid) {
String[] indices = getResources().getStringArray(resid);
float lastVal = Float.parseFloat(indices[0]);
for (int i=1; i<indices.length; i++) {
float thisVal = Float.parseFloat(indices[i]);
if (val < (lastVal + (thisVal-lastVal)*.5f)) {
return i-1;
}
lastVal = thisVal;
}
return indices.length-1;
}
public void readFontSizePreference(ListPreference pref) {
try {
mCurConfig.updateFrom(
ActivityManagerNative.getDefault().getConfiguration());
} catch (RemoteException e) {
}
pref.setValueIndex(floatToIndex(mCurConfig.fontScale,
R.array.entryvalues_font_size));
}
@Override
public void onResume() {
super.onResume();
@@ -179,6 +211,7 @@ public class DisplaySettings extends SettingsPreferenceFragment implements
mAnimations.setValueIndex(idx);
updateAnimationsSummary(mAnimations.getValue());
updateAccelerometerRotationCheckbox();
readFontSizePreference(mFontSizePref);
}
private void updateAccelerometerRotationCheckbox() {
@@ -200,6 +233,14 @@ public class DisplaySettings extends SettingsPreferenceFragment implements
}
}
public void writeFontSizePreference(Object objValue) {
try {
mCurConfig.fontScale = Float.parseFloat(objValue.toString());
ActivityManagerNative.getDefault().updateConfiguration(mCurConfig);
} catch (RemoteException e) {
}
}
@Override
public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
if (preference == mAccelerometer) {
@@ -241,6 +282,9 @@ public class DisplaySettings extends SettingsPreferenceFragment implements
Log.e(TAG, "could not persist screen timeout setting", e);
}
}
if (KEY_FONT_SIZE.equals(key)) {
writeFontSizePreference(objValue);
}
return true;
}