我有兴趣拥有统一的彩色工具栏和状态栏.如果我提供colorPrimary并且colorPrimaryDark颜色相同,这应该是可能的.我使用ActionBar获得了所需的结果,但没有使用工具栏.我还将创建一个导航视图,所以我需要状态栏为透明.
代码:Styles-v21
<style name="AppTheme.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
<item name="android:windowDrawsSystemBarBackgrounds">true</item>
<item name="android:statusBarColor">@android:color/transparent</item>
</style>
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代码:样式
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimary</item>
<item name="colorAccent">@color/colorAccent</item>
</style>
<style name="AppTheme.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>
<style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar"/>
<style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light"/>
</resources>
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重现步骤 :
Navigation Drawer Activityprimary和primaryDark颜色相同我正在尝试使用 RPi 实现无线电播放器。目标是设置播放列表并在播放列表填充后开始播放。一旦停止代码被执行,播放器和收音机进程就会退出。
无线电进程很好地终止,但播放器进程即使在调用终止后仍然保持等待。如果再次调用停止代码,则播放器进程终止
尝试的事情:
玩家代码:
while playlist:
player = subprocess.Popen(
["avconv", "-i", "Music/%s" % playlist[0], "-f", "s16le", "-ar",
"22.05k", "-ac", "1", "-"], stdout=subprocess.PIPE)
radio = subprocess.Popen(["./pifm", "-", freq], stdin=player.stdout)
radio.wait()
print "************ exiting from radio :)"
player.wait()
print "************ exiting from player :)"
playlist.pop(0)
player = None
radio = None
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播放器停止代码(从另一个线程调用):
print "************ stop requested"
if radio and radio.poll() is None:
print "************ terminating radio :)"
radio.terminate()
if player and player.poll() is None: …Run Code Online (Sandbox Code Playgroud) 我正在编写一个程序,image使用对源数组(hist)中存储的数据的计算来创建灰度图像().存储在源数组中的数据在调用calloc for image后重置为零.
func1(){
float * hist = (float *) calloc(256, sizeof(float));
// operation to populate 'hist'
for...{
for...{
hist.....
}
}
hist2img(hist);
free(hist);
return 0;
}
hist2img(hist){
cout << "-> " << hist [4 * 250] << endl;
unsigned char * image = (unsigned char *) calloc(256 * 256, sizeof(unsigned char));
cout << "-> " << hist [4 * 250] << endl;
free(image);
return 0;
}
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输出是:
-> 0.997291
-> 0
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数据会发生什么变化?hist在calloc指令之后,所有元素都为0.我需要image …