Android Open Source - InfoSecProj Start Test Activity

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License

The source code is released under:

MIT License

Java Source Code

package com.infosec.gesturelock;
// w w w .  jav  a2s .c  o  m
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.support.v4.app.NavUtils;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.Window;
import android.widget.ImageView;
import android.widget.Toast;

import com.infosec.gesturedata.GestureData;

public class StartTestActivity extends Activity implements SensorEventListener {
  private GestureData userAttempt = null;
  
  private SensorManager mSensorManager;
  private Sensor mAccelerometer;
  
  static final float ALPHA = 0.25f;
  
  private float[] mAcceleration = null;
  
  private boolean btnDown = false;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    
        this.requestWindowFeature(Window.FEATURE_NO_TITLE);
    
    setContentView(R.layout.activity_start_test);
    
//    View decorView = getWindow().getDecorView();
//    decorView.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE
//                                  | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
//                                  | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
//                                  | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
//                                  | View.SYSTEM_UI_FLAG_FULLSCREEN
//                                  | View.SYSTEM_UI_FLAG_LOW_PROFILE);
    
    this.userAttempt = new GestureData();

    this.mSensorManager = (SensorManager) getSystemService(SetPasswordActivity.SENSOR_SERVICE);
    
    if(this.mSensorManager.getDefaultSensor(Sensor.TYPE_LINEAR_ACCELERATION) != null){
      this.mAccelerometer = this.mSensorManager.getDefaultSensor(Sensor.TYPE_LINEAR_ACCELERATION);
    }
    
    this.mSensorManager.registerListener(this, this.mAccelerometer, SensorManager.SENSOR_DELAY_NORMAL);

    findViewById(R.id.imageDisplayView).setOnTouchListener(new OnTouchListener() {
      @Override
      public boolean onTouch(View v, MotionEvent event) {
        
        switch (event.getAction()) {
          case MotionEvent.ACTION_DOWN:
//            Toast.makeText(getApplicationContext(), "Down", Toast.LENGTH_SHORT).show();
            btnDown = true;
            break;
          case MotionEvent.ACTION_UP:
//            Toast.makeText(getApplicationContext(), "Up", Toast.LENGTH_SHORT).show();
            btnDown = false;
            checkData();
            break;
          default:
            break;
        }
        return true;
      }
    });
  }
  
  @Override
  protected void onResume() {
    super.onResume();
    mSensorManager.registerListener(this, mAccelerometer, SensorManager.SENSOR_DELAY_NORMAL);
  }
   
  @Override
  protected void onPause() {
    super.onPause();
    mSensorManager.unregisterListener(this);
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
      return true;
    }
    return super.onOptionsItemSelected(item);
  }
  
  @Override
  public void onBackPressed() {
//    mSensorManager.unregisterListener(this);
//    
//        NavUtils.navigateUpFromSameTask(this);
//        this.finish();
//
//      super.onBackPressed();
  }
  
  private void onLeave() {
    mSensorManager.unregisterListener(this);
    
        NavUtils.navigateUpFromSameTask(this);
        this.finish();

      super.onBackPressed();
  }

  @Override
  public void onAccuracyChanged(Sensor sensor, int accuracy) {
    // TODO Auto-generated method stub
    
  }

  @Override
  public void onSensorChanged(SensorEvent event) {
        Sensor sensor = event.sensor;
        int type = sensor.getType();
        
    switch(type){
      case Sensor.TYPE_LINEAR_ACCELERATION:
        mAcceleration = lowPassFilter(event.values.clone(), mAcceleration);
        
        if(this.btnDown){
          this.userAttempt.accelerometerParser(mAcceleration);
        }
        
        break;
      default:
        break;
    }
  }

  private float[] lowPassFilter(float[] input, float[] output) {
    if (output == null) {
      return input;     
    }

      for (int i=0; i<input.length; i++) {
        output[i] = output[i] + ALPHA * (input[i] - output[i]);
      }

       return output;
  }
  
  private void checkData() {
    if(GestureData.compResults(HomeActivity.userPassword, this.userAttempt)){
      ImageView lockView = (ImageView) findViewById(R.id.imageDisplayView);
      lockView.setImageResource(R.drawable.unlockscreen);
      lockView.invalidate();
      Toast.makeText(this, "Unlocked.", Toast.LENGTH_SHORT).show();

      mSensorManager.unregisterListener(this);
      

      Intent successScreen = new Intent(this, LockSuccessScreen.class);
      this.startActivity(successScreen);
      this.finish();
    }else{
      imposter();
    }
  }
  
  private void imposter() {
        AlertDialog.Builder alert = new AlertDialog.Builder(this);
        alert.setTitle("IMPOSTER!");
        alert.setInverseBackgroundForced(true);
        alert.setMessage("You have gestured the incorrect pattern. Would you like to retry?");
        alert.setPositiveButton("Retry", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
              userAttempt.data.clear();
              
                dialog.dismiss();
            }
        });

        alert.setNegativeButton("No", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
                onLeave();
            }
        });
        
        alert.show();
  }
}

Java Source Code List

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