flashlight

问题 Is there a way to set the LED intensity that I desire? I know that to turn on the LED I use: p.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH); mycam.setParameters(p); But this code just turns on the LED. But is there a way to set different intensities to the LED for a stronger light or to reduce the light intensity? 回答1: HTC has an alternative API that supports this, however it's only on HTC Sense devices, and as of Gingerbread they've changed the permissions so it's only for their

问题 Is there a way to set the LED intensity that I desire? I know that to turn on the LED I use: p.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH); mycam.setParameters(p); But this code just turns on the LED. But is there a way to set different intensities to the LED for a stronger light or to reduce the light intensity? 回答1: HTC has an alternative API that supports this, however it's only on HTC Sense devices, and as of Gingerbread they've changed the permissions so it's only for their

问题 So many LED flashlight API questions for Android. I'm afraid to ask yet another, but here goes.. Using the tried and true FLASH_MODE_TORCH I am able to achieve satisfaction with my Samsung Galaxy SII and get the LED flash turned on. On my friend's Galaxy Nexus, no such luck. Nor on my other friend's Droid X. I'm noticing for a not insignificant number of devices specific native IOCTL calls seem to be required. Is this the case for the Galaxy Nexus? How do I find a reference to program it? I

问题 I am building an AR app that needs the flashlight to be turned on torch mode. Turning on torch mode and then enabling the AR scene works fine on my iPhone 8, but on the iPhone X, it the flashlight turns on and then off again. Is there some way around this, or something specific I have to do for the iPhone X to work? - (void)turnTorchOn:(bool) on { Class captureDeviceClass = NSClassFromString(@"AVCaptureDevice"); if (captureDeviceClass != nil) { AVCaptureDevice *device = [AVCaptureDevice

问题 In my program I tested this: try { FileWriter mWriter = new FileWriter("/sys/class/leds/flashlight/brightness"); mWriter.write(125); mWriter.flush(); } catch (Exception e) { Log.e(TAG, "setFlashlightEnabled failed", e); } I have this in the log : 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

问题 I saw that there are many questions liek this but I didn't find any way. In my app I have my own Camera with some options , and also have button named btnFlash for turning on/off camera's flash light while camera is running. I tried many ways, but nothing worked as on Samsung tab and HTC. here is one of them ImageButton btnFlash = (ImageButton) findViewById(R.id.btn_flash); btnFlash.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Context context =

问题 i created a flashlight application,flashlight working. but flashlight not work when device screen power is off/sleep. i want flashlight continue on ,when device screen in off/sleep.. i am new for this site, i don't know,how upload full code, so i upload code in my blog site manifest code <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"

问题 I am developing a flashlight app and the thing is that the app is working as expected, but not when "home" or "back" key is pressed. i want my app to keep the torch light on even when the user presses "Home" key so that user can do other works while torch is on. On back key, the flash turning off is fine. Here is my code. Please help me with it, thanx a lot to all. public class LightsOn extends Activity implements OnKeyListener { ImageView button; Boolean flashon=true; private boolean

问题 I made a simple application with 2 buttons to test flashlights. button1.setOnClickListener...etc if (cameraObj ==null){ return; } Camera.Parameters cameraParams =cameraObj.getParameters(); if(cameraParams.getFlashMode() == null) { return;} cameraParams.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH); cameraObj.setParameters(cameraParams); cameraObj.startPreview(); button2.setOnClick etc... if(cameraObj==null){ return; } Camera.Parameters cameraParams = cameraObj.getParameters(); cameraParams

问题 When the strobe value is increased from 1 to 10 the blinking of flashlight will never stop.neither it stops on zero nor it turns on beside it just get blinking and blinking constantly. here i am adding the code which i have written to do so. if someone knows the solutions please help me. Thread is not stop thread works until you stop debugger.. cheers! enter code here flashButton = findViewById(R.id.flash_button); mCameraManager = (CameraManager) getSystemService(Context.CAMERA_SERVICE); try