| /* |
| * Copyright (C) 2007 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.example.android.apis.graphics; |
| |
| import android.content.Context; |
| import android.graphics.*; |
| import android.hardware.Sensor; |
| import android.hardware.SensorEvent; |
| import android.hardware.SensorEventListener; |
| import android.hardware.SensorManager; |
| import android.os.Bundle; |
| import android.util.Log; |
| import android.view.View; |
| |
| public class SensorTest extends GraphicsActivity { |
| private final String TAG = "SensorTest"; |
| |
| private SensorManager mSensorManager; |
| private Sensor mSensor; |
| private SampleView mView; |
| private float[] mValues; |
| |
| private static class RunAve { |
| private final float[] mWeights; |
| private final float mWeightScale; |
| private final float[] mSamples; |
| private final int mDepth; |
| private int mCurr; |
| |
| public RunAve(float[] weights) { |
| mWeights = weights; |
| |
| float sum = 0; |
| for (int i = 0; i < weights.length; i++) { |
| sum += weights[i]; |
| } |
| mWeightScale = 1 / sum; |
| |
| mDepth = weights.length; |
| mSamples = new float[mDepth]; |
| mCurr = 0; |
| } |
| |
| public void addSample(float value) { |
| mSamples[mCurr] = value; |
| mCurr = (mCurr + 1) % mDepth; |
| } |
| |
| public float computeAve() { |
| final int depth = mDepth; |
| int index = mCurr; |
| float sum = 0; |
| for (int i = 0; i < depth; i++) { |
| sum += mWeights[i] * mSamples[index]; |
| index -= 1; |
| if (index < 0) { |
| index = depth - 1; |
| } |
| } |
| return sum * mWeightScale; |
| } |
| }; |
| |
| private final SensorEventListener mListener = new SensorEventListener() { |
| |
| private final float[] mScale = new float[] { 2, 2.5f, 0.5f }; // accel |
| private float[] mPrev = new float[3]; |
| private long mLastGestureTime; |
| |
| public void onSensorChanged(SensorEvent event) { |
| boolean show = false; |
| float[] diff = new float[3]; |
| |
| for (int i = 0; i < 3; i++) { |
| diff[i] = Math.round(mScale[i] * (event.values[i] - mPrev[i]) * 0.45f); |
| if (Math.abs(diff[i]) > 0) { |
| show = true; |
| } |
| mPrev[i] = event.values[i]; |
| } |
| |
| if (show) { |
| // only shows if we think the delta is big enough, in an attempt |
| // to detect "serious" moves left/right or up/down |
| Log.e(TAG, "sensorChanged " + event.sensor.getName() + |
| " (" + event.values[0] + ", " + event.values[1] + ", " + |
| event.values[2] + ")" + " diff(" + diff[0] + |
| " " + diff[1] + " " + diff[2] + ")"); |
| } |
| |
| long now = android.os.SystemClock.uptimeMillis(); |
| if (now - mLastGestureTime > 1000) { |
| mLastGestureTime = 0; |
| |
| float x = diff[0]; |
| float y = diff[1]; |
| boolean gestX = Math.abs(x) > 3; |
| boolean gestY = Math.abs(y) > 3; |
| |
| if ((gestX || gestY) && !(gestX && gestY)) { |
| if (gestX) { |
| if (x < 0) { |
| Log.e("test", "<<<<<<<< LEFT <<<<<<<<<<<<"); |
| } else { |
| Log.e("test", ">>>>>>>>> RITE >>>>>>>>>>>"); |
| } |
| } else { |
| if (y < -2) { |
| Log.e("test", "<<<<<<<< UP <<<<<<<<<<<<"); |
| } else { |
| Log.e("test", ">>>>>>>>> DOWN >>>>>>>>>>>"); |
| } |
| } |
| mLastGestureTime = now; |
| } |
| } |
| } |
| |
| public void onAccuracyChanged(Sensor sensor, int accuracy) { |
| } |
| }; |
| |
| @Override |
| protected void onCreate(Bundle icicle) { |
| super.onCreate(icicle); |
| mSensorManager = (SensorManager)getSystemService(Context.SENSOR_SERVICE); |
| mSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER); |
| mView = new SampleView(this); |
| setContentView(mView); |
| if (false) Log.d(TAG, "create " + mSensorManager); |
| } |
| |
| @Override |
| protected void onResume() { |
| super.onResume(); |
| mSensorManager.registerListener(mListener, mSensor, SensorManager.SENSOR_DELAY_FASTEST); |
| if (false) Log.d(TAG, "resume " + mSensorManager); |
| } |
| |
| @Override |
| protected void onStop() { |
| mSensorManager.unregisterListener(mListener); |
| super.onStop(); |
| if (false) Log.d(TAG, "stop " + mSensorManager); |
| } |
| |
| private class SampleView extends View { |
| private Paint mPaint = new Paint(); |
| private Path mPath = new Path(); |
| private boolean mAnimate; |
| |
| public SampleView(Context context) { |
| super(context); |
| |
| // Construct a wedge-shaped path |
| mPath.moveTo(0, -50); |
| mPath.lineTo(-20, 60); |
| mPath.lineTo(0, 50); |
| mPath.lineTo(20, 60); |
| mPath.close(); |
| } |
| |
| @Override |
| protected void onDraw(Canvas canvas) { |
| Paint paint = mPaint; |
| |
| canvas.drawColor(Color.WHITE); |
| |
| paint.setAntiAlias(true); |
| paint.setColor(Color.BLACK); |
| paint.setStyle(Paint.Style.FILL); |
| |
| int w = canvas.getWidth(); |
| int h = canvas.getHeight(); |
| int cx = w / 2; |
| int cy = h / 2; |
| |
| canvas.translate(cx, cy); |
| if (mValues != null) { |
| canvas.rotate(-mValues[0]); |
| } |
| canvas.drawPath(mPath, mPaint); |
| } |
| |
| @Override |
| protected void onAttachedToWindow() { |
| mAnimate = true; |
| if (false) Log.d(TAG, "onAttachedToWindow. mAnimate="+mAnimate); |
| super.onAttachedToWindow(); |
| } |
| |
| @Override |
| protected void onDetachedFromWindow() { |
| mAnimate = false; |
| if (false) Log.d(TAG, "onAttachedToWindow. mAnimate="+mAnimate); |
| super.onDetachedFromWindow(); |
| } |
| } |
| } |