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The Android Open Source Project
2009-03-03 18:28:16 -08:00
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98
samples/ApiDemos/src/com/example/android/apis/os/MorseCode.java
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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 com.example.android.apis.os;
// Need the following import to get access to the app resources, since this
// class is in a sub-package.
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.os.Vibrator;
import android.view.View;
import android.widget.TextView;
import com.example.android.apis.R;
/**
* <h3>App that vibrates the vibrator with the Morse Code for a string.</h3>
<p>This demonstrates the {@link android.os.Vibrator android.os.Vibrator} class.
<h4>Demo</h4>
OS / Morse Code Vibrator
<h4>Source files</h4>
* <table class="LinkTable">
* <tr>
* <td >src/com.example.android.apis/os/MorseCode.java</td>
* <td >The Morse Code Vibrator</td>
* </tr>
* <tr>
* <td >res/any/layout/morse_code.xml</td>
* <td >Defines contents of the screen</td>
* </tr>
* </table>
*/
public class MorseCode extends Activity
{
/** Tag string for our debug logs */
private static final String TAG = "MorseCode";
/** Our text view */
private TextView mTextView;
;
/**
* Initialization of the Activity after it is first created. Must at least
* call {@link android.app.Activity#setContentView setContentView()} to
* describe what is to be displayed in the screen.
*/
@Override
protected void onCreate(Bundle savedInstanceState)
{
// Be sure to call the super class.
super.onCreate(savedInstanceState);
// See assets/res/any/layout/hello_world.xml for this
// view layout definition, which is being set here as
// the content of our screen.
setContentView(R.layout.morse_code);
// Set the OnClickListener for the button so we see when it's pressed.
findViewById(R.id.button).setOnClickListener(mClickListener);
// Save the text view so we don't have to look it up each time
mTextView = (TextView)findViewById(R.id.text);
}
/** Called when the button is pushed */
View.OnClickListener mClickListener = new View.OnClickListener() {
public void onClick(View v) {
// Get the text out of the view
String text = mTextView.getText().toString();
// convert it using the function defined above. See the docs for
// android.os.Vibrator for more info about the format of this array
long[] pattern = MorseCodeConverter.pattern(text);
// Start the vibration
Vibrator vibrator = (Vibrator)getSystemService(Context.VIBRATOR_SERVICE);
vibrator.vibrate(pattern, -1);
}
};
}

141
samples/ApiDemos/src/com/example/android/apis/os/MorseCodeConverter.java
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/*
* Copyright (C) 2008 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.os;
/** Class that implements the text to morse code coversion */
class MorseCodeConverter {
private static final long SPEED_BASE = 100;
static final long DOT = SPEED_BASE;
static final long DASH = SPEED_BASE * 3;
static final long GAP = SPEED_BASE;
static final long LETTER_GAP = SPEED_BASE * 3;
static final long WORD_GAP = SPEED_BASE * 7;
/** The characters from 'A' to 'Z' */
private static final long[][] LETTERS = new long[][] {
/* A */ new long[] { DOT, GAP, DASH },
/* B */ new long[] { DASH, GAP, DOT, GAP, DOT, GAP, DOT },
/* C */ new long[] { DASH, GAP, DOT, GAP, DASH, GAP, DOT },
/* D */ new long[] { DASH, GAP, DOT, GAP, DOT },
/* E */ new long[] { DOT },
/* F */ new long[] { DOT, GAP, DOT, GAP, DASH, GAP, DOT },
/* G */ new long[] { DASH, GAP, DASH, GAP, DOT },
/* H */ new long[] { DOT, GAP, DOT, GAP, DOT, GAP, DOT },
/* I */ new long[] { DOT, GAP, DOT },
/* J */ new long[] { DOT, GAP, DASH, GAP, DASH, GAP, DASH },
/* K */ new long[] { DASH, GAP, DOT, GAP, DASH },
/* L */ new long[] { DOT, GAP, DASH, GAP, DOT, GAP, DOT },
/* M */ new long[] { DASH, GAP, DASH },
/* N */ new long[] { DASH, GAP, DOT },
/* O */ new long[] { DASH, GAP, DASH, GAP, DASH },
/* P */ new long[] { DOT, GAP, DASH, GAP, DASH, GAP, DOT },
/* Q */ new long[] { DASH, GAP, DASH, GAP, DOT, GAP, DASH },
/* R */ new long[] { DOT, GAP, DASH, GAP, DOT },
/* S */ new long[] { DOT, GAP, DOT, GAP, DOT },
/* T */ new long[] { DASH },
/* U */ new long[] { DOT, GAP, DOT, GAP, DASH },
/* V */ new long[] { DOT, GAP, DOT, GAP, DASH },
/* W */ new long[] { DOT, GAP, DASH, GAP, DASH },
/* X */ new long[] { DASH, GAP, DOT, GAP, DOT, GAP, DASH },
/* Y */ new long[] { DASH, GAP, DOT, GAP, DASH, GAP, DASH },
/* Z */ new long[] { DASH, GAP, DASH, GAP, DOT, GAP, DOT },
};
/** The characters from '0' to '9' */
private static final long[][] NUMBERS = new long[][] {
/* 0 */ new long[] { DASH, GAP, DASH, GAP, DASH, GAP, DASH, GAP, DASH },
/* 1 */ new long[] { DOT, GAP, DASH, GAP, DASH, GAP, DASH, GAP, DASH },
/* 2 */ new long[] { DOT, GAP, DOT, GAP, DASH, GAP, DASH, GAP, DASH },
/* 3 */ new long[] { DOT, GAP, DOT, GAP, DOT, GAP, DASH, GAP, DASH },
/* 4 */ new long[] { DOT, GAP, DOT, GAP, DOT, GAP, DOT, GAP, DASH },
/* 5 */ new long[] { DOT, GAP, DOT, GAP, DOT, GAP, DOT, GAP, DOT },
/* 6 */ new long[] { DASH, GAP, DOT, GAP, DOT, GAP, DOT, GAP, DOT },
/* 7 */ new long[] { DASH, GAP, DASH, GAP, DOT, GAP, DOT, GAP, DOT },
/* 8 */ new long[] { DASH, GAP, DASH, GAP, DASH, GAP, DOT, GAP, DOT },
/* 9 */ new long[] { DASH, GAP, DASH, GAP, DASH, GAP, DASH, GAP, DOT },
};
private static final long[] ERROR_GAP = new long[] { GAP };
/** Return the pattern data for a given character */
static long[] pattern(char c) {
if (c >= 'A' && c <= 'Z') {
return LETTERS[c - 'A'];
}
if (c >= 'a' && c <= 'z') {
return LETTERS[c - 'a'];
}
else if (c >= '0' && c <= '9') {
return NUMBERS[c - '0'];
}
else {
return ERROR_GAP;
}
}
static long[] pattern(String str) {
boolean lastWasWhitespace;
int strlen = str.length();
// Calculate how long our array needs to be.
int len = 1;
lastWasWhitespace = true;
for (int i=0; i<strlen; i++) {
char c = str.charAt(i);
if (Character.isWhitespace(c)) {
if (!lastWasWhitespace) {
len++;
lastWasWhitespace = true;
}
} else {
if (!lastWasWhitespace) {
len++;
}
lastWasWhitespace = false;
len += pattern(c).length;
}
}
// Generate the pattern array. Note that we put an extra element of 0
// in at the beginning, because the pattern always starts with the pause,
// not with the vibration.
long[] result = new long[len+1];
result[0] = 0;
int pos = 1;
lastWasWhitespace = true;
for (int i=0; i<strlen; i++) {
char c = str.charAt(i);
if (Character.isWhitespace(c)) {
if (!lastWasWhitespace) {
result[pos] = WORD_GAP;
pos++;
lastWasWhitespace = true;
}
} else {
if (!lastWasWhitespace) {
result[pos] = LETTER_GAP;
pos++;
}
lastWasWhitespace = false;
long[] letter = pattern(c);
System.arraycopy(letter, 0, result, pos, letter.length);
pos += letter.length;
}
}
return result;
}
}

241
samples/ApiDemos/src/com/example/android/apis/os/Sensors.java
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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 com.example.android.apis.os;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.hardware.SensorManager;
import android.hardware.SensorListener;
import android.util.Log;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.RectF;
/**
* <h3>Application that displays the values of the acceleration sensor graphically.</h3>
<p>This demonstrates the {@link android.hardware.SensorManager android.hardware.SensorManager} class.
<h4>Demo</h4>
OS / Sensors
<h4>Source files</h4>
* <table class="LinkTable">
* <tr>
* <td >src/com.example.android.apis/os/Sensors.java</td>
* <td >Sensors</td>
* </tr>
* </table>
*/
public class Sensors extends Activity {
/** Tag string for our debug logs */
private static final String TAG = "Sensors";
private SensorManager mSensorManager;
private GraphView mGraphView;
private class GraphView extends View implements SensorListener
{
private Bitmap mBitmap;
private Paint mPaint = new Paint();
private Canvas mCanvas = new Canvas();
private Path mPath = new Path();
private RectF mRect = new RectF();
private float mLastValues[] = new float[3*2];
private float mOrientationValues[] = new float[3];
private int mColors[] = new int[3*2];
private float mLastX;
private float mScale[] = new float[2];
private float mYOffset;
private float mMaxX;
private float mSpeed = 1.0f;
private float mWidth;
private float mHeight;
public GraphView(Context context) {
super(context);
mColors[0] = Color.argb(192, 255, 64, 64);
mColors[1] = Color.argb(192, 64, 128, 64);
mColors[2] = Color.argb(192, 64, 64, 255);
mColors[3] = Color.argb(192, 64, 255, 255);
mColors[4] = Color.argb(192, 128, 64, 128);
mColors[5] = Color.argb(192, 255, 255, 64);
mPaint.setFlags(Paint.ANTI_ALIAS_FLAG);
mRect.set(-0.5f, -0.5f, 0.5f, 0.5f);
mPath.arcTo(mRect, 0, 180);
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
mBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.RGB_565);
mCanvas.setBitmap(mBitmap);
mCanvas.drawColor(0xFFFFFFFF);
mYOffset = h * 0.5f;
mScale[0] = - (h * 0.5f * (1.0f / (SensorManager.STANDARD_GRAVITY * 2)));
mScale[1] = - (h * 0.5f * (1.0f / (SensorManager.MAGNETIC_FIELD_EARTH_MAX)));
mWidth = w;
mHeight = h;
if (mWidth < mHeight) {
mMaxX = w;
} else {
mMaxX = w-50;
}
mLastX = mMaxX;
super.onSizeChanged(w, h, oldw, oldh);
}
@Override
protected void onDraw(Canvas canvas) {
synchronized (this) {
if (mBitmap != null) {
final Paint paint = mPaint;
final Path path = mPath;
final int outer = 0xFFC0C0C0;
final int inner = 0xFFff7010;
if (mLastX >= mMaxX) {
mLastX = 0;
final Canvas cavas = mCanvas;
final float yoffset = mYOffset;
final float maxx = mMaxX;
final float oneG = SensorManager.STANDARD_GRAVITY * mScale[0];
paint.setColor(0xFFAAAAAA);
cavas.drawColor(0xFFFFFFFF);
cavas.drawLine(0, yoffset, maxx, yoffset, paint);
cavas.drawLine(0, yoffset+oneG, maxx, yoffset+oneG, paint);
cavas.drawLine(0, yoffset-oneG, maxx, yoffset-oneG, paint);
}
canvas.drawBitmap(mBitmap, 0, 0, null);
float[] values = mOrientationValues;
if (mWidth < mHeight) {
float w0 = mWidth * 0.333333f;
float w = w0 - 32;
float x = w0*0.5f;
for (int i=0 ; i<3 ; i++) {
canvas.save(Canvas.MATRIX_SAVE_FLAG);
canvas.translate(x, w*0.5f + 4.0f);
canvas.save(Canvas.MATRIX_SAVE_FLAG);
paint.setColor(outer);
canvas.scale(w, w);
canvas.drawOval(mRect, paint);
canvas.restore();
canvas.scale(w-5, w-5);
paint.setColor(inner);
canvas.rotate(-values[i]);
canvas.drawPath(path, paint);
canvas.restore();
x += w0;
}
} else {
float h0 = mHeight * 0.333333f;
float h = h0 - 32;
float y = h0*0.5f;
for (int i=0 ; i<3 ; i++) {
canvas.save(Canvas.MATRIX_SAVE_FLAG);
canvas.translate(mWidth - (h*0.5f + 4.0f), y);
canvas.save(Canvas.MATRIX_SAVE_FLAG);
paint.setColor(outer);
canvas.scale(h, h);
canvas.drawOval(mRect, paint);
canvas.restore();
canvas.scale(h-5, h-5);
paint.setColor(inner);
canvas.rotate(-values[i]);
canvas.drawPath(path, paint);
canvas.restore();
y += h0;
}
}
}
}
}
public void onSensorChanged(int sensor, float[] values) {
//Log.d(TAG, "sensor: " + sensor + ", x: " + values[0] + ", y: " + values[1] + ", z: " + values[2]);
synchronized (this) {
if (mBitmap != null) {
final Canvas canvas = mCanvas;
final Paint paint = mPaint;
if (sensor == SensorManager.SENSOR_ORIENTATION) {
for (int i=0 ; i<3 ; i++) {
mOrientationValues[i] = values[i];
}
} else {
float deltaX = mSpeed;
float newX = mLastX + deltaX;
int j = (sensor == SensorManager.SENSOR_MAGNETIC_FIELD) ? 1 : 0;
for (int i=0 ; i<3 ; i++) {
int k = i+j*3;
final float v = mYOffset + values[i] * mScale[j];
paint.setColor(mColors[k]);
canvas.drawLine(mLastX, mLastValues[k], newX, v, paint);
mLastValues[k] = v;
}
if (sensor == SensorManager.SENSOR_MAGNETIC_FIELD)
mLastX += mSpeed;
}
invalidate();
}
}
}
public void onAccuracyChanged(int sensor, int accuracy) {
// TODO Auto-generated method stub
}
}
/**
* Initialization of the Activity after it is first created. Must at least
* call {@link android.app.Activity#setContentView setContentView()} to
* describe what is to be displayed in the screen.
*/
@Override
protected void onCreate(Bundle savedInstanceState) {
// Be sure to call the super class.
super.onCreate(savedInstanceState);
mSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
mGraphView = new GraphView(this);
setContentView(mGraphView);
}
@Override
protected void onResume() {
super.onResume();
mSensorManager.registerListener(mGraphView,
SensorManager.SENSOR_ACCELEROMETER |
SensorManager.SENSOR_MAGNETIC_FIELD |
SensorManager.SENSOR_ORIENTATION,
SensorManager.SENSOR_DELAY_FASTEST);
}
@Override
protected void onStop() {
mSensorManager.unregisterListener(mGraphView);
super.onStop();
}
}