Android Open Source - testPattern Main Activity

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License

The source code is released under:

MIT License

Java Source Code

package com.testPattern;
/*w w w .j  av a  2s.c om*/
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.util.ArrayList;

import com.example.testbubble.R;

import android.app.Activity;
import android.app.ActionBar;
import android.app.Fragment;
import android.content.DialogInterface;
import android.graphics.Point;
import android.os.Bundle;
import android.os.SystemClock;
import android.view.InputDevice;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
import android.widget.Button;
import android.os.Build;


//TODO: Remove the activity part from this class and let it be as an static method class to get the device parameters and touch events
/**
 * This class provides methods to obtain the devices parameters
 * @author Juan Herrero Macias
 *
 */
public class MainActivity extends Activity {
  String touchEventPath = new String(); // Path to the input stream of the touch device /dev/input/eventx
  String touchDescriptor = "4e2720e99bd2b59adae8529881343531fff7c98e"; // Descriptor obtained from the MotionEvent created by the touch device. 
  String getTouchParamCmd = "dumpsys input" + "\n";
  String getTouchEventCmd = "getevent -l " + touchEventPath + "| grep PO" + "\n";
  
  String deviceName = new String();
  String deviceClass = new String();
  String devicePath = new String();
  String deviceDescriptor = new String();
  float xScale;
  float yScale;
  
  // getevent output labels
//  final String ABS_MT_TRACKING_ID = "0039";
//  final String ABS_MT_POSITION_X = "0035";
//  final String ABS_MT_POSITION_Y = "0036";
//  final String ABS_MT_PRESSURE = "003a";
//  final String SYN_REPORT = "0000";
//  final String ABS_MT_ORIENTATION  = "0034";
//  final String ABS_SLOT = "002f";
  
  // getevent output byte labels
  final byte ABS_MT_TRACKING_ID = 0x39;
  final byte ABS_MT_POSITION_X = 0x35;
  final byte ABS_MT_POSITION_Y = 0x36;
  final byte ABS_MT_PRESSURE = 0x3a;
  final byte SYN_REPORT = 0x00;
  
  // ABS_MT_TRACKING_ID value when a touch event ends
//  final String TOUCH_END = "ffffffff";
  final byte TOUCH_END = (byte)0xff;
  
  // Touch event Point variables
  ArrayList<Point> pointList = new ArrayList<Point>();
  

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
            WindowManager.LayoutParams.FLAG_FULLSCREEN);
    PaintView pView = new PaintView(this);
    
//    // Create a button that obtains needed parameters and starts the test
//    Button startButton = (Button) findViewById(R.id.buttonStart);
//    
//    startButton.setOnTouchListener(new OnTouchListener() {
//      
//      @Override
//      public boolean onTouch(View v, MotionEvent event) {
//        InputDevice x = event.getDevice();
//        touchDescriptor = x.getDescriptor();
////        setContentView(pView);
//        return false;
//      }
//    });
//    
//    setContentView(R.layout.activity_main);
    
    setContentView(pView);
  }
  
  @Override
  protected void onStart() {
    super.onStart();
    try{
        Process su = Runtime.getRuntime().exec("su");
        DataOutputStream outputStream = new DataOutputStream(su.getOutputStream());
        BufferedReader paramInputStream = new BufferedReader (new InputStreamReader(su.getInputStream()));
        outputStream.writeBytes("dumpsys input\n");
        outputStream.flush();

        String tempString = new String();
  
//      StringBuilder test = new StringBuilder();
      while ((tempString = paramInputStream.readLine()) != null) {
        // Search for given Descriptor:
        if (tempString.matches("    .:.*") ) {
//          test.append(tempString);
          deviceName = tempString.substring(4);
          deviceClass = getParam("Classes", paramInputStream);
          if (deviceClass.equals("0x00000015") || deviceClass.equals("0x00000014")) {
            devicePath = getParam ("Path", paramInputStream);
            deviceDescriptor = getParam ("Descriptor", paramInputStream);
            // This is the device we are looking for, so we search for the relationship between the touch sensor resolution and the pixel resolution
            if (deviceDescriptor.equals(touchDescriptor)) {
              touchEventPath = devicePath;
              while ((tempString = paramInputStream.readLine()) != null) {
                if (tempString.contains(deviceName)) {
                  // Touch sensor report * x/yScale = Pixel scale touch location.
                  xScale = Float.valueOf(getParam("XScale", paramInputStream));
                  yScale = Float.valueOf(getParam("YScale", paramInputStream));
                  outputStream.close();
                  paramInputStream.close();
                  break;  
                }
              }
            }
          }
        }
      }
    } catch (Exception e) {
      e.printStackTrace();
      // TODO: handle exception
      //TODO: Implement an alternative when device parameters can't be parsed from dumpsys input
    } 
    
    /**
     * This thread will parse the output bytes of the input devices directly from linux kernel    
     */
    // Start raw touch screen coordinates input stream
    new Thread (new Runnable() {
      @Override
      public void run() {
        try {
          Process su = Runtime.getRuntime().exec("su");
          DataOutputStream outputStream = new DataOutputStream(su.getOutputStream());
          BufferedInputStream touchInputStream = new BufferedInputStream(su.getInputStream());
          outputStream.writeBytes("cat " + devicePath + "\n");
          outputStream.flush();

//          String tempString = new String();
          int xTouch = 0;
          int yTouch = 0;
          boolean isNewPoint = false;
//          int pressure = 0; 
          
          byte[] bBuffer = new byte[4];
          while (touchInputStream.skip(10) != 0 
              && touchInputStream.read(bBuffer) != -1
              && touchInputStream.skip(2) != 0) {
            if (bBuffer[0] == ABS_MT_TRACKING_ID
                && bBuffer[2] != TOUCH_END
                && bBuffer[3] != TOUCH_END) {
              while (touchInputStream.skip(10) != 0 
                  && touchInputStream.read(bBuffer) != -1
                  && touchInputStream.skip(2) != 0
                  && bBuffer[2] != TOUCH_END
                  && bBuffer[3] != TOUCH_END) {
                switch (bBuffer[0]) {
                case ABS_MT_POSITION_X:
                  // First or last 8 bits are masked to avoid values over 0x80 being casted to negative int
                  xTouch = (bBuffer[3] << 8 & 0xFF00 | bBuffer[2] & 0xFF);
                  isNewPoint = true;
                  break;
                  
                case ABS_MT_POSITION_Y:
                  yTouch = bBuffer[3] << 8 | bBuffer[2] & 0xFF;
                  isNewPoint = true;
                  break;
                  
                case SYN_REPORT:
                  if (isNewPoint) {
                    pointList.add(new Point(xTouch, yTouch));
                    isNewPoint = false;
                  }
                  break;

                default:
                  break;
                }
              }
            }
          }
        } catch (Exception e) {
          e.printStackTrace();
          // TODO: handle exception
        }   
      }
    }).start();
  }
  
  /**
   * Gets 
   * @return First Point in the touch Points array list
   */
  public Point getNextTouch() {
    Point returnPoint = null;
    if (pointList.size() > 0) { 
      returnPoint = pointList.get(0);
      pointList.remove(0);
      //TODO: If pointList gets too big, we should consider trimming it
      // pointList.trimToSize();
    }
    return returnPoint;
  }
  
  public Point[] getRemainingTouchPoints() {
    Point[] tempPoints =  null;
    int size;
    if ((size = pointList.size()) > 0) {
      tempPoints = pointList.toArray(new Point[size]);
      for (int i = 0; i < size; i++) {
        pointList.remove(0);
      }
      //TODO: If pointList gets too big, we should consider trimming it
      //  pointList.trimToSize();
    }
    return tempPoints;
  }
      
  /**
   * Finds the next line in the provided inputStream beginning with parameter value and returns its content.
   * This method is written for parsing the output of $dumpsys input command
   * @param parameter
   * @param inputStream Input stream associated with the output of $dumpsys input
   * @return
   */
  private String getParam(String parameter, BufferedReader inputStream) {
    String tempString;
    String returnString = new String();
    try {
      while ((tempString = inputStream.readLine().trim()) != null) {
        if (tempString.startsWith(parameter) == true) {
          returnString = tempString.substring((parameter + ": ").length()); 
          break;
        }
      }      
    } catch (Exception e) {
      // TODO: handle exception
    }
    return returnString;
  }

//  @Override
//  public boolean onTouchEvent(MotionEvent event) {
//    // TODO Auto-generated method stub
//    InputDevice x = event.getDevice();
//    String Descriptor = x.getDescriptor();
//    return super.onTouchEvent(event);
//  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {

    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
  }

  @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);
  }
}

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