/* * 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.app.Activity;import android.content.Context;import android.graphics.*;import android.hardware.SensorListener;import android.hardware.SensorManager;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.os.SystemClock;import android.util.Config;import android.util.Log;import android.view.View;public class SensorTest extends GraphicsActivity {	private SensorManager mSensorManager;    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 SensorListener mListener = new SensorListener() {        private final float[] mScale = new float[] { 2, 2.5f, 0.5f };   // accel        private float[] mPrev = new float[3];                    public void onSensorChanged(int sensor, float[] values) {            boolean show = false;            float[] diff = new float[3];            for (int i = 0; i < 3; i++) {                diff[i] = Math.round(mScale[i] * (values[i] - mPrev[i]) * 0.45f);                if (Math.abs(diff[i]) > 0) {                    show = true;                }                mPrev[i] = 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                android.util.Log.e("test", "sensorChanged " + sensor + " (" + values[0] + ", " + values[1] + ", " + 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) {                            android.util.Log.e("test", "<<<<<<<< LEFT <<<<<<<<<<<<");                        } else {                            android.util.Log.e("test", ">>>>>>>>> RITE >>>>>>>>>>>");                        }                    } else {                        if (y < -2) {                            android.util.Log.e("test", "<<<<<<<< UP <<<<<<<<<<<<");                        } else {                            android.util.Log.e("test", ">>>>>>>>> DOWN >>>>>>>>>>>");                        }                    }                    mLastGestureTime = now;                }            }        }                private long mLastGestureTime;        public void onAccuracyChanged(int sensor, int accuracy) {            // TODO Auto-generated method stub                    }    };    @Override    protected void onCreate(Bundle icicle) {        super.onCreate(icicle);        mSensorManager = (SensorManager)getSystemService(Context.SENSOR_SERVICE);        mView = new SampleView(this);        setContentView(mView);//        android.util.Log.d("skia", "create " + mSensorManager);    }    @Override    protected void onResume() {        super.onResume();                int mask = 0;//        mask |= SensorManager.SENSOR_ORIENTATION;        mask |= SensorManager.SENSOR_ACCELEROMETER;                mSensorManager.registerListener(mListener, mask, SensorManager.SENSOR_DELAY_FASTEST);//        android.util.Log.d("skia", "resume " + mSensorManager);    }        @Override    protected void onStop() {        mSensorManager.unregisterListener(mListener);        super.onStop();//        android.util.Log.d("skia", "stop " + mSensorManager);    }    private class SampleView extends View {        private Paint   mPaint = new Paint();        private Path    mPath = new Path();        private boolean mAnimate;        private long    mNextTime;        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;            super.onAttachedToWindow();        }                @Override        protected void onDetachedFromWindow() {            mAnimate = false;            super.onDetachedFromWindow();        }    }}