Mega Code Archive
Sensor Test
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/*
* 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 app.test;
import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Picture;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.util.AttributeSet;
import android.util.Config;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewParent;
import android.widget.LinearLayout.LayoutParams;
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 (Config.DEBUG)
Log.d(TAG, "create " + mSensorManager);
}
@Override
protected void onResume() {
super.onResume();
mSensorManager.registerListener(mListener, mSensor,
SensorManager.SENSOR_DELAY_FASTEST);
if (Config.DEBUG)
Log.d(TAG, "resume " + mSensorManager);
}
@Override
protected void onStop() {
mSensorManager.unregisterListener(mListener);
super.onStop();
if (Config.DEBUG)
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 (Config.DEBUG)
Log.d(TAG, "onAttachedToWindow. mAnimate=" + mAnimate);
super.onAttachedToWindow();
}
@Override
protected void onDetachedFromWindow() {
mAnimate = false;
if (Config.DEBUG)
Log.d(TAG, "onAttachedToWindow. mAnimate=" + mAnimate);
super.onDetachedFromWindow();
}
}
}
class GraphicsActivity extends Activity {
// set to true to test Picture
private static final boolean TEST_PICTURE = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public void setContentView(View view) {
if (TEST_PICTURE) {
ViewGroup vg = new PictureLayout(this);
vg.addView(view);
view = vg;
}
super.setContentView(view);
}
}
class PictureLayout extends ViewGroup {
private final Picture mPicture = new Picture();
public PictureLayout(Context context) {
super(context);
}
public PictureLayout(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
public void addView(View child) {
if (getChildCount() > 1) {
throw new IllegalStateException(
"PictureLayout can host only one direct child");
}
super.addView(child);
}
@Override
public void addView(View child, int index) {
if (getChildCount() > 1) {
throw new IllegalStateException(
"PictureLayout can host only one direct child");
}
super.addView(child, index);
}
@Override
public void addView(View child, LayoutParams params) {
if (getChildCount() > 1) {
throw new IllegalStateException(
"PictureLayout can host only one direct child");
}
super.addView(child, params);
}
@Override
public void addView(View child, int index, LayoutParams params) {
if (getChildCount() > 1) {
throw new IllegalStateException(
"PictureLayout can host only one direct child");
}
super.addView(child, index, params);
}
@Override
protected LayoutParams generateDefaultLayoutParams() {
return new LayoutParams(LayoutParams.MATCH_PARENT,
LayoutParams.MATCH_PARENT);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
final int count = getChildCount();
int maxHeight = 0;
int maxWidth = 0;
for (int i = 0; i < count; i++) {
final View child = getChildAt(i);
if (child.getVisibility() != GONE) {
measureChild(child, widthMeasureSpec, heightMeasureSpec);
}
}
maxWidth += getPaddingLeft() + getPaddingRight();
maxHeight += getPaddingTop() + getPaddingBottom();
Drawable drawable = getBackground();
if (drawable != null) {
maxHeight = Math.max(maxHeight, drawable.getMinimumHeight());
maxWidth = Math.max(maxWidth, drawable.getMinimumWidth());
}
setMeasuredDimension(resolveSize(maxWidth, widthMeasureSpec),
resolveSize(maxHeight, heightMeasureSpec));
}
private void drawPict(Canvas canvas, int x, int y, int w, int h, float sx,
float sy) {
canvas.save();
canvas.translate(x, y);
canvas.clipRect(0, 0, w, h);
canvas.scale(0.5f, 0.5f);
canvas.scale(sx, sy, w, h);
canvas.drawPicture(mPicture);
canvas.restore();
}
@Override
protected void dispatchDraw(Canvas canvas) {
super.dispatchDraw(mPicture.beginRecording(getWidth(), getHeight()));
mPicture.endRecording();
int x = getWidth() / 2;
int y = getHeight() / 2;
if (false) {
canvas.drawPicture(mPicture);
} else {
drawPict(canvas, 0, 0, x, y, 1, 1);
drawPict(canvas, x, 0, x, y, -1, 1);
drawPict(canvas, 0, y, x, y, 1, -1);
drawPict(canvas, x, y, x, y, -1, -1);
}
}
@Override
public ViewParent invalidateChildInParent(int[] location, Rect dirty) {
location[0] = getLeft();
location[1] = getTop();
dirty.set(0, 0, getWidth(), getHeight());
return getParent();
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
final int count = super.getChildCount();
for (int i = 0; i < count; i++) {
final View child = getChildAt(i);
if (child.getVisibility() != GONE) {
final int childLeft = getPaddingLeft();
final int childTop = getPaddingTop();
child.layout(childLeft, childTop,
childLeft + child.getMeasuredWidth(),
childTop + child.getMeasuredHeight());
}
}
}
}
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