Question

www.un.org/Depts/DGACM/index_spanish.htm 在我的节目中,我测试了:。

try {               
    FileWriter mWriter = new FileWriter("/sys/class/leds/flashlight/brightness");
    mWriter.write(125);
    mWriter.flush();
} catch (Exception e) {
    Log.e(TAG, "setFlashlightEnabled failed", e);
}

www.un.org/Depts/DGACM/index_spanish.htm 页: 1

01-13 14:56:30.578: E/test(603): setFlashlightEnabled failed
01-13 14:56:30.578: E/test(603): java.io.FileNotFoundException: /sys/class/leds/flashlight/brightness (Permission denied)
01-13 14:56:30.578: E/test(603):    at org.apache.harmony.luni.platform.OSFileSystem.open(Native Method)
01-13 14:56:30.578: E/test(603):    at dalvik.system.BlockGuard$WrappedFileSystem.open(BlockGuard.java:232)
01-13 14:56:30.578: E/test(603):    at java.io.FileOutputStream.<init>(FileOutputStream.java:94)
01-13 14:56:30.578: E/test(603):    at java.io.FileOutputStream.<init>(FileOutputStream.java:66)
01-13 14:56:30.578: E/test(603):    at java.io.FileWriter.<init>(FileWriter.java:80)
01-13 14:56:30.578: E/test(603):    at sad.sdsa.sdjahskdhj.TestpuissanceActivity.onClick(TestpuissanceActivity.java:87)
01-13 14:56:30.578: E/test(603):    at android.view.View.performClick(View.java)
01-13 14:56:30.578: E/test(603):    at android.view.View$PerformClick.run(View.java)
01-13 14:56:30.578: E/test(603):    at android.os.Handler.handleCallback(Handler.java)
01-13 14:56:30.578: E/test(603):    at android.os.Handler.dispatchMessage(Handler.java)
01-13 14:56:30.578: E/test(603):    at android.os.Looper.loop(Looper.java)
01-13 14:56:30.578: E/test(603):    at android.app.ActivityThread.main(ActivityThread.java)
01-13 14:56:30.578: E/test(603):    at java.lang.reflect.Method.invokeNative(Native Method)
01-13 14:56:30.578: E/test(603):    at java.lang.reflect.Method.invoke(Method.java:507)
01-13 14:56:30.578: E/test(603):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java)
01-13 14:56:30.578: E/test(603):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java)
01-13 14:56:30.578: E/test(603):    at dalvik.system.NativeStart.main(Native Method)

www.un.org/Depts/DGACM/index_spanish.htm 我在亚行进行了测试。页: 1

echo 125 > /sys/class/leds/flashlight/brightness

它扎根,但并非正常。

What is the solution to change the flash output without being root?

Answer 1

它属于系统,受到系统保护,因此,你必须成为获得服务的根源。此外,所有信安装置在结构中都有同样的闪光设计,例如:在HTC装置中,它支持APIC处理3级不同的亮度,但其他设备则不照......。

Answer 2

甲型六氯环己烷和甲型六氯环己烷(甲型六氯环己烷和甲型六氯环己烷)现在有可能正式成为!

Torch Strength Control

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