Flashlight By Shaking Hand - Flashlight By Shaking Hand源代碼下載

Flashlight By Shaking Hand

FLASH源碼

1.0.0

下載

手電筒握手！

開發人員：工程師SAAD
電子郵件：[email protected]
網站：https：//engr-saad.com
LinkedIn：https：//www.linkedin.com/in/engr-saad/
Facebook：https：//www.facebook.com/engr.saad.2/
公司網絡：https：//triangletech.com.bd/
WhatsApp：+8801810536303

概括

該項目的基礎由典型的Android智能手機與相機一起提供。在看到該遊戲商店有許多要求不必要的權限的應用程序之後，我決定創建一個無需任何類型的許可即可切換LED的應用程序。該應用程序還實施了一個檢測設備震動何時的服務（用於切換手電筒）。

截至2020年1月3日，手電筒已在Apache許可證版本2.0下獲得許可。

下載

源代碼（zip）：flashlight.zip

代碼

代碼的大部分用Java編寫，很簡單。用於檢測搖動運動：聲明全局變量：

    SensorManager sensorManager = null ;
    public static final float SHAKE_THRESHOLD = 10.25f ; // How hard should user shake to invoke the service
    public static final int MIN_TIME_BETWEEN_SHAKES = 1000 ;
    private long lastShakeTime = 0 ;
    private boolean isFlashlightOn = false ;

初始化Sensormanager：

    sensorManager = ( SensorManager ) getSystemService ( SENSOR_SERVICE );
    if ( sensorManager != null ) {
        Sensor accelerometer = sensorManager . getDefaultSensor ( Sensor . TYPE_ACCELEROMETER );
        sensorManager . registerListener (( SensorEventListener ) this , accelerometer , SensorManager . SENSOR_DELAY_NORMAL );
    }

使類實施SensoreVentListener接口並覆蓋它是Onsensorchanged方法：

      @ Override
    public void onSensorChanged ( SensorEvent event ) {
        if ( event . sensor . getType () == Sensor . TYPE_ACCELEROMETER ) {
            long curTime = System . currentTimeMillis ();
            if (( curTime - lastShakeTime ) > MIN_TIME_BETWEEN_SHAKES ) {

                float x = event . values [ 0 ];
                float y = event . values [ 1 ];
                float z = event . values [ 2 ];

                double acceleration = Math . sqrt ( Math . pow ( x , 2 ) +
                        Math . pow ( y , 2 ) +
                        Math . pow ( z , 2 )) - SensorManager . GRAVITY_EARTH ;

                if ( acceleration > SHAKE_THRESHOLD ) {
                    lastShakeTime = curTime ;
                    if (! isFlashlightOn ) {
                        torchToggle ( "on" );
                        isFlashlightOn = true ;
                    }
                    else {
                        torchToggle ( "off" );
                        isFlashlightOn = false ;
                    }
                }
            }
        }

創建一個函數torchtoggle（字符串命令）：

    private void torchToggle ( String command ) {
        if ( Build . VERSION . SDK_INT >= Build . VERSION_CODES . M ) {
            CameraManager camManager = ( CameraManager ) getSystemService ( Context . CAMERA_SERVICE );
            String cameraId = null ; // Usually back camera is at 0 position.
            try {
                if ( camManager != null ) {
                    cameraId = camManager . getCameraIdList ()[ 0 ];
                }
                if ( camManager != null ) {
                    if ( command . equals ( "on" )) {
                        camManager . setTorchMode ( cameraId , true );   // Turn ON
                        isFlashlightOn = true ;
                    } else {
                        camManager . setTorchMode ( cameraId , false );  // Turn OFF
                        isFlashlightOn = false ;
                    }
                }
            } catch ( CameraAccessException e ) {
                e . getMessage ();
            }
        }
    }