Android 손전등이 꺼지지 않음

Question

Android 기기에서 손전등을 끄고 튕기는 터치리스 제스처를 사용하는 앱을 만들고 있습니다. 그것은 잘 돌아가지만, 다시 되돌릴 수는 없습니다. 모든 도움을 미리 감사드립니다. 여기

당신이 당신의 분기점 방법 내부

mCamera.stopPreview(); 
mCamera.release(); 

를 추가해야 내 MainActivity.java

 package com.proximitysensorapp.primo.app; 

    import android.hardware.Sensor; 
    import android.hardware.SensorEvent; 
    import android.hardware.SensorEventListener; 
    import android.hardware.SensorManager; 
    import android.os.Bundle; 
    import android.app.Activity; 
    import android.content.Intent; 
    import android.widget.TextView; 
    import java.io.IOException; 
    import android.content.pm.PackageManager; 
    import android.hardware.Camera; 
    import android.hardware.Camera.Parameters; 
    import android.util.Log; 
    import android.view.SurfaceHolder; 
    import android.view.SurfaceHolder.Callback; 
    import android.view.SurfaceView; 
    import android.view.View; 
    public class MainActivity extends Activity implements SensorEventListener, Callback 
    { 
    SensorManager sm; 
    Sensor s; 
    TextView et1; 
    Intent Activitynew; 
    Camera camera; 
    SurfaceView surfaceView; 
    SurfaceHolder surfaceHolder; 
    public void TurnOn(View view) 
    { 
    if (FlashAvailable() && camera != null) 
    { 
    Parameters p = camera.getParameters(); 
    p.setFlashMode(Parameters.FLASH_MODE_TORCH); 
    camera.setParameters(p); 
    //camera.startPreview(); 
    try 
    { 
    camera.setPreviewDisplay(surfaceHolder); 
    } 
    catch (IOException e) { 
    e.printStackTrace(); 
    }    
    } 
    } 
    public void TurnOff(View view) { 
    if (FlashAvailable() && camera != null) { 
    Parameters p = camera.getParameters(); 
    p.setFlashMode(Parameters.FLASH_MODE_OFF); 
    camera.setParameters(p); 
    //camera.stopPreview();   
    } 
    } 
    @SuppressWarnings("deprecation") 
    @Override 
    protected void onCreate(Bundle savedInstanceState) 
    { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    sm = (SensorManager) getSystemService(SENSOR_SERVICE); 
    s = sm.getDefaultSensor(Sensor.TYPE_PROXIMITY); 
    sm.registerListener(this, s, SensorManager.SENSOR_DELAY_NORMAL); 
    Activitynew = new Intent(MainActivity.this, Activity2.class); 
    surfaceView = (SurfaceView) this.findViewById(R.id.surface1); 
    surfaceHolder = surfaceView.getHolder(); 
    surfaceHolder.addCallback(this); 
    surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); 
    } 
    @Override 
    public void onResume() 
    { 
    super.onResume(); 
    try { 
    camera = Camera.open();  
    } catch (Exception e) { 
    //---exception handling here--- 
    Log.d("Flashlight", e.toString()); 
    } 
    } 

    @Override 
    public void onPause() { 
    super.onPause(); 
    TurnOff(null); 
    camera.release(); 
    } 


    private Boolean FlashAvailable() { 
    return getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH); 
    } 


    @Override 
    public void onAccuracyChanged(Sensor arg0, int arg1) 
    { 

    } 
    @Override 
    public void onSensorChanged(SensorEvent event) 
    { 
    if (event.sensor.getType() == Sensor.TYPE_PROXIMITY) 
    { 
    int temp = (int) event.values[0]; 

    if (temp==1) 
    { 
    TurnOff(null); 
    } 
    else if (temp==0) 
    { 
    TurnOn(null); 
    } 
    } 
    } 

    @Override 
    public void surfaceCreated(SurfaceHolder holder) { 
    // TODO Auto-generated method stub 

    } 

    @Override 
    public void surfaceChanged(SurfaceHolder holder, int format, int width, 
    int height) { 
    // TODO Auto-generated method stub 

    } 

    @Override 
    public void surfaceDestroyed(SurfaceHolder holder) { 
    // TODO Auto-generated method stub 

    } 
    } 

Answer 1

입니다