Android Open Source - FlashLight Frag_ Normal Flash

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License

The source code is released under:

MIT License

Java Source Code

package com.inches.flashlight;
/*from   ww w .j a v  a  2  s  .c  o  m*/
import android.os.*;
import android.view.View;
import android.view.ViewGroup;
import android.view.LayoutInflater;
import android.widget.CompoundButton;
import android.widget.ToggleButton;
import android.content.Context;
import android.content.pm.PackageManager;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.util.Log;

import android.support.v4.app.Fragment;

public class Frag_NormalFlash extends Fragment
{
  /* Should I have to init cameras in background threaad? It took so long!*/
  
  private final static String TAG ="Inches";
  private ToggleButton flashToggle;
  private boolean isFlashValid = false;
  private static Camera cam = null;
  Parameters p = null;

  @Override
  public void onCreate(Bundle savedInstanceState){
    // TODO: Implement this method
    super.onCreate(savedInstanceState);

    final Context c = getActivity();
    isFlashValid = c.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH);

  }

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
    // TODO: Implement this method  
    final ViewGroup layout = (ViewGroup) inflater.inflate(R.layout.flash_normal, container, false);

    if (isFlashValid){  
      try{
        initCam();
        p = cam.getParameters();
      }
      catch (Exception e){
        e.printStackTrace();
      }  
        flashToggle = (ToggleButton) layout.findViewById(R.id.nFlashController);
        flashToggle.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){

            @Override
            public void onCheckedChanged(CompoundButton p1, boolean state)
            {
              if (state){
                turnFlashOn();      
              }
            else{
                  turnFlashOff();      
              }
              }    
        });    
       }
    return layout;
  }
  
  @Override
  public void onPause(){
    // TODO: Implement this method
    super.onStop();  
    if (flashToggle.isChecked()){
      flashToggle.setChecked(false);
    }
    if (cam != null){
      cam.release();
      cam = null;
    }
  }

  private void turnFlashOn()
  {
    try{
      initCam();
      p.setFlashMode(Parameters.FLASH_MODE_TORCH);
      cam.setParameters(p);
      cam.startPreview();    
    }
    catch (Exception e){
      e.printStackTrace();
    }
  }

  private void turnFlashOff(){
    try{
      if (cam == null)
        return;
      p.setFlashMode(Parameters.FLASH_MODE_OFF);
      cam.setParameters(p);
      cam.stopPreview();
    }
    catch (Exception e){
      e.printStackTrace();
    }
  }

  private void initCam(){
    if (cam == null){
      cam = Camera.open();
       }
    }
}

Java Source Code List

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