Android Open Source - MobileApps Main Activity

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License

The source code is released under:

MIT License

Java Source Code

package com.the9pointers.simpleflashlight;
//w  w  w .j  a  v a2 s.  co m
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.pm.PackageManager;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.ToggleButton;

public class MainActivity extends Activity {

  private Camera camera;
  private ToggleButton button;
  private final Context context=this;
  
  
    @Override
  protected void onStop() {
    super.onStop();
    if(camera!=null){
      camera.release();
    }
  }

  @Override
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button=(ToggleButton) findViewById(R.id.toggleButton);
        final PackageManager pm=context.getPackageManager();
        if(!isCameraSupported(pm)){
          AlertDialog alertDialog=new AlertDialog.Builder(context).create();
          alertDialog.setTitle("No Camera!");
          alertDialog.setMessage("This device doesn't support Camera.");
          alertDialog.setButton(RESULT_OK, "OK",new DialogInterface.OnClickListener() {
        
        @Override
        public void onClick(DialogInterface arg0, int arg1) {
        Log.e("Error","Device doesn't support Camera");
        }
      });
          alertDialog.show();
        }
        camera=Camera.open();
    }

  public void onToggleClicked(View view){
    PackageManager pm=context.getPackageManager();
    final Parameters p=camera.getParameters();
    if(isFlashSupported(pm)){
      boolean on=((ToggleButton)view).isChecked();
      if(on){
        Log.i("Info","Flash turned On");
        p.setFlashMode(Parameters.FLASH_MODE_TORCH);
        camera.setParameters(p);
        camera.stopPreview();
      } else {
      Log.i("Info","Flash turned off");
      p.setFlashMode(Parameters.FLASH_MODE_OFF);
      camera.setParameters(p);
      camera.stopPreview();
    }
  } else {
      button.setChecked(false);
      AlertDialog alertDialog =new AlertDialog.Builder(context).create();
      alertDialog.setTitle("No Camera Flash!");
          alertDialog.setMessage("This device's Camera doesn't support Flash.");
          alertDialog.setButton(RESULT_OK, "OK",new DialogInterface.OnClickListener() {
        
        @Override
        public void onClick(DialogInterface arg0, int arg1) {
        Log.e("Error","Camera doesn't support Flash");
        }
      });
          alertDialog.show();
        }
      
    }
  
  private boolean isFlashSupported(PackageManager packagemanager){
    if(packagemanager.hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH)){
      return true;
    }
    return false;
  }
  
  private boolean isCameraSupported(PackageManager packagemanager){
    if(packagemanager.hasSystemFeature(PackageManager.FEATURE_CAMERA)){
      return true;
    }
    return false;
  }
  
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
    
}

Java Source Code List

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