Android修改默认字体巨细（小、默认、大、最大）
通常修改屏幕表现巨细会通过调整屏幕密度来实现，但这调整的是整体的巨细。客户会经常要去调整至符合巨细，必要修改字体默认巨细可参考本文的内容需求：字体默以为小
根据packages/apps/Settings/src/com/android/settings/display/FontSizePreferenceController.java
public class FontSizePreferenceController extends BasePreferenceController {
public FontSizePreferenceController(Context context, String key) {
super(context, key);
}
@Override
public int getAvailabilityStatus() {
return AVAILABLE;
}
@Override
public CharSequence getSummary() {
final float currentScale = Settings.System.getFloat(mContext.getContentResolver(),
Settings.System.FONT_SCALE, 1.0f);
final Resources res = mContext.getResources();
final String[] entries = res.getStringArray(R.array.entries_font_size);
final String[] strEntryValues = res.getStringArray(R.array.entryvalues_font_size);
final int index = ToggleFontSizePreferenceFragment.fontSizeValueToIndex(currentScale,
strEntryValues);
return entries;
}
} 可知字体巨细是由Settings.System.FONT_SCALE来控制的
根据packages\apps\Settings\src\com\android\settings\display\ToggleFontSizePreferenceFragment.java
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final Resources res = getContext().getResources();
final ContentResolver resolver = getContext().getContentResolver();
// Mark the appropriate item in the preferences list.
mEntries = res.getStringArray(R.array.entries_font_size);
final String[] strEntryValues = res.getStringArray(R.array.entryvalues_font_size);
final float currentScale =
Settings.System.getFloat(resolver, Settings.System.FONT_SCALE, 1.0f);
mInitialIndex = fontSizeValueToIndex(currentScale, strEntryValues);
mValues = new float;
for (int i = 0; i < strEntryValues.length; ++i) {
mValues = Float.parseFloat(strEntryValues);
}
getActivity().setTitle(R.string.title_font_size);
} 可知修改的巨细应满足对应值：
packages/apps/Settings/res/values/arrays.xml
<string-array name="entries_font_size">
<item msgid="6490061470416867723">Small</item>
<item msgid="3579015730662088893">Default</item>
<item msgid="1678068858001018666">Large</item>
<item msgid="490158884605093126">Largest</item>
</string-array>
<string-array name="entryvalues_font_size" translatable="false">
<item>0.85</item>
<item>1.0</item>
<item>1.15</item>
<item>1.30</item>
</string-array>
故修改如下：
--- a/alps-mp-t0/vendor/mediatek/proprietary/packages/apps/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java
+++ b/alps-mp-t0/vendor/mediatek/proprietary/packages/apps/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java
@@ -2272,6 +2272,8 @@ class DatabaseHelper extends SQLiteOpenHelper {
loadBooleanSetting(stmt, Settings.System.ACCELEROMETER_ROTATION,
R.bool.def_accelerometer_rotation);
+
+ loadSetting(stmt, Settings.System.FONT_SCALE, 0.85f);
loadIntegerSetting(stmt, Settings.System.USER_ROTATION, R.integer.def_user_rotation);
diff --git a/alps-mp-t0/vendor/mediatek/proprietary/packages/apps/SettingsProvider/src/com/android/providers/settings/SettingsHelper.java b/alps-mp-t0/vendor/mediatek/proprietary/packages/apps/SettingsProvider/src/com/android/providers/settings/SettingsHelper.java
old mode 100644
new mode 100755
index 440bb67..6fd6c72
--- a/alps-mp-t0/vendor/mediatek/proprietary/packages/apps/SettingsProvider/src/com/android/providers/settings/SettingsHelper.java
+++ b/alps-mp-t0/vendor/mediatek/proprietary/packages/apps/SettingsProvider/src/com/android/providers/settings/SettingsHelper.java
@@ -360,7 +360,7 @@ public class SettingsHelper {
mContext.getContentResolver(), name, defaultScale);
return Math.abs(currentScale - defaultScale) >= FLOAT_TOLERANCE;
case Settings.System.FONT_SCALE:
- return Settings.System.getFloat(mContext.getContentResolver(), name, 1.0f) != 1.0f;
+ return Settings.System.getFloat(mContext.getContentResolver(), name,0.85f) != 0.85f;
default:
return false;
}
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