Android Open Source - BounceMe Play Surface View

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From Project

Back to project page BounceMe.

License

The source code is released under:

MIT License

Java Source Code

package com.example.bounceme;
//  w  w w.  j  av a2  s.co m
import java.util.Random;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

class PlaySurfaceView extends SurfaceView implements Runnable,
    SensorEventListener {
  private int VIEW_WIDTH, VIEW_HEIGHT;
  private Thread thread = null;
  private SurfaceHolder surfaceHolder;
  private volatile boolean running = false;
  private int touchX = 0;
  private int levelNum;
  private SensorManager sensorManager;

  private Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
  Random random;

  private Level level;
  private boolean acc;

  public PlaySurfaceView(Context context, int num) {
    super(context);
    levelNum = num;
    surfaceHolder = getHolder();

    // reading for prefs whether the user wants to use the accelerometer for
    // movement or not
    SharedPreferences prefs = context.getSharedPreferences("prefs", Context.MODE_PRIVATE);
    acc = prefs.getBoolean("acc", false);

    if (acc) {
      sensorManager = (SensorManager) context.getSystemService("sensor");
    }
  }

  public PlaySurfaceView(Context context, AttributeSet attrs) {
    super(context, attrs);
  }

  public PlaySurfaceView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
  }

  public void onResumeMySurfaceView() {
    running = true;
    thread = new Thread(this);
    thread.start();
    if(acc){
      sensorManager.registerListener(this,
        sensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),
        SensorManager.SENSOR_DELAY_NORMAL);
    }
  }

  public void onPauseMySurfaceView() {
    boolean retry = true;
    running = false;
    while (retry) {
      try {
        thread.join();
        retry = false;
      } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
      }
    }
  }

  public boolean onTouchEvent(MotionEvent event) {
    //if we are not using the accelerometer then we check if the screen is being touched
    if (!acc) {
      
      //we get the location of the and the status of it and send to ball class for calculating movement
      int action = event.getAction();
      switch (action) {
      case MotionEvent.ACTION_DOWN:
        //if the touch was on the left we give a negative else we give a poitive indicating movement direction
        if (event.getX() < VIEW_WIDTH / 2) {
          touchX = -2;
        } else {
          touchX = 2;
        }
        break;
      case MotionEvent.ACTION_MOVE:
        break;
      case MotionEvent.ACTION_UP:
        touchX = 0;
        break;
      case MotionEvent.ACTION_CANCEL:
        touchX = 0;
        break;
      case MotionEvent.ACTION_OUTSIDE:
        touchX = 0;
        break;
        
      }
    }
    return true;
  }

  @Override
  public void onSensorChanged(SensorEvent event) {
    float x = event.values[1];
    if (x < -2) {
      if (x > -5) {
        touchX = -1;
      } else {
        touchX = -2;
      }
    } else if (x > 2) {
      if (x < 5) {
        touchX = 1;
      } else {
        touchX = 2;
      }
    } else {
      touchX = 0;
    }
  }

  // the physics thread where the magic happens and all objects are drawn and
  // updated
  @Override
  public void run() {
    paint.setColor(getResources().getColor(R.color.orange));

    // TODO Auto-generated method stub
    while (true) {
      if (surfaceHolder.getSurface().isValid()) {
        Canvas canvas = surfaceHolder.lockCanvas();
        level = new Level(levelNum, canvas.getWidth(),
            canvas.getHeight());
        surfaceHolder.unlockCanvasAndPost(canvas);
        break;
      }
    }

    while (running) {
      if (surfaceHolder.getSurface().isValid()) {
        Canvas canvas = surfaceHolder.lockCanvas();
        // we lock the canvas so that we can draw our new items on it
        int w = canvas.getWidth();
        int h = canvas.getHeight();

        // check if the screen is currently being touched
        level.moveBall(touchX);

        // drawing a rectangle in the background to erase previous
        // drawings
        canvas.drawRect(0, 0, w, h, paint);

        // updating our element's positions and drawing them
        String result = level.animate(canvas, w, h);

        if (result == "reset") {
          ((levelGen) getContext()).restart();
        } else if (result == "win") {
          Context context = getContext(); // from
                          // MySurfaceView/Activity
          Intent intent = new Intent(context, WinActivity.class);
          intent.putExtra("level", levelNum);
          context.startActivity(intent);
        }

        // we now unlock the canvas and display the newly drawn items
        surfaceHolder.unlockCanvasAndPost(canvas);
      }

    }
  }

  // resets the ball on the level
  public void reset() {
    level.reset();
  }

  // accellerometer accuracy change listener
  @Override
  public void onAccuracyChanged(Sensor arg0, int arg1) {
    // TODO Auto-generated method stub

  }

  // sets the initial width and height for the view (also sets the width and
  // height if there is every a change to them)
  public void onSizeChanged(int w, int h, int ow, int oh) {
    VIEW_WIDTH = w;
    VIEW_HEIGHT = h;
    Log.d("OUTPUT", "(" + VIEW_WIDTH + "," + VIEW_HEIGHT + ")");
  }
}

Java Source Code List

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