从设置阅读字体大小 [英] Read font size from Settings
问题描述
这个问题是一个几乎dublicate的 Android应用程序:如何阅读字体大小设置下我读的答案 CommonsWare 这点使用 Settings.System.FONT_SCALE
。所以我写这几行字:
This question is a almost dublicate of Android App: how to read Font Size under Settings? I read the answer of CommonsWare which points to use Settings.System.FONT_SCALE
. So I wrote this few lines:
float scale = -66.6f;
try {
scale = android.provider.Settings.System.getFloat(getContentResolver(),
android.provider.Settings.System.FONT_SCALE);
} catch(SettingNotFoundException e) {
Log.e(getClass().getSimpleName(), "Error: ", e);
}
Toast.makeText(this, "scale=" + scale, Toast.LENGTH_LONG).show();
我的问题是,我总是得到 SettingNotFoundException
我使用的是Android 4.2.2的设备。顺便说一句我的code是在活动
的的onCreate
回调。
My problem is that I always get the SettingNotFoundException
I'm using an Android 4.2.2 device. By the way I that code is in an onCreate
callback of an Activity
.
我也用Google搜索这个问题,并发现了大约3个站点,它使用相同的code。是否需要一些特殊的权限?我想也许可 android.permission.WRITE_SETTINGS
没有成功。
I also googled for that problem and found about 3 sites which uses the same code. Is some special permission required? I tried also the permission android.permission.WRITE_SETTINGS
without success.
推荐答案
我刚刚发现的<一个源$ C $ C href="http://developer.android.com/reference/android/provider/Settings.System.html"><$c$c>Settings.System$c$c>这个功能:
I just found in the source code of Settings.System
this function:
/** @hide */
public static void getConfigurationForUser(ContentResolver cr,
Configuration outConfig, int userHandle) {
outConfig.fontScale = Settings.System.getFloatForUser(
cr, FONT_SCALE, outConfig.fontScale, userHandle);
if (outConfig.fontScale < 0) {
outConfig.fontScale = 1;
}
}
然而,有在 FONT_SCALE
的使用情况,以便我检查了<一href="http://developer.android.com/reference/android/content/res/Configuration.html"><$c$c>Configuration$c$c>培训班里的文档指向 getResources()。getConfiguration()
。所以我cound通过修复我的code:
There is however the FONT_SCALE
in usage so I checked for that Configuration
class where the documentation points to getResources().getConfiguration()
. So I cound fix my code by using:
float scale = getResources().getConfiguration().fontScale;
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