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Commit d6a463a9 authored by Romain Guy's avatar Romain Guy
Browse files

Add a new API to ListView: setGestures(int). This allows developers to enable... 

Add a new API to ListView: setGestures(int). This allows developers to enable gestures to jump inside the list or filter it. This change also introduces a new XML attribute to control this API. It also adds the ability to theme the GestureOverlayView from the gestures library. Finally, this adds a new VERSION header to the binary format used to store the letters for the recognizer.
parent cfcc0df2

api/current.xml

+165 −87
Original line number Diff line number Diff line
@@ -3584,17 +3584,6 @@ 
 visibility="public"

>

</field>

<field name="donut_resource_pad39"

 type="int"

 transient="false"

 volatile="false"

 value="16843385"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="donut_resource_pad4"

 type="int"

 transient="false"
@@ -3606,61 +3595,6 @@ 
 visibility="public"

>

</field>

<field name="donut_resource_pad40"

 type="int"

 transient="false"

 volatile="false"

 value="16843384"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="donut_resource_pad41"

 type="int"

 transient="false"

 volatile="false"

 value="16843383"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="donut_resource_pad42"

 type="int"

 transient="false"

 volatile="false"

 value="16843382"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="donut_resource_pad43"

 type="int"

 transient="false"

 volatile="false"

 value="16843381"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="donut_resource_pad44"

 type="int"

 transient="false"

 volatile="false"

 value="16843380"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="donut_resource_pad5"

 type="int"

 transient="false"
@@ -4134,6 +4068,28 @@ 
 visibility="public"

>

</field>

<field name="fadeDuration"

 type="int"

 transient="false"

 volatile="false"

 value="16843384"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="fadeOffset"

 type="int"

 transient="false"

 volatile="false"

 value="16843383"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="fadingEdge"

 type="int"

 transient="false"
@@ -4453,6 +4409,39 @@ 
 visibility="public"

>

</field>

<field name="gestureColor"

 type="int"

 transient="false"

 volatile="false"

 value="16843381"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="gestureStrokeWidth"

 type="int"

 transient="false"

 volatile="false"

 value="16843380"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="gestures"

 type="int"

 transient="false"

 volatile="false"

 value="16843385"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="gradientRadius"

 type="int"

 transient="false"
@@ -8853,6 +8842,17 @@ 
 visibility="public"

>

</field>

<field name="uncertainGestureColor"

 type="int"

 transient="false"

 volatile="false"

 value="16843382"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="unselectedAlpha"

 type="int"

 transient="false"
@@ -46572,6 +46572,20 @@ 
<parameter name="attrs" type="android.util.AttributeSet">

</parameter>

</constructor>

<constructor name="GestureOverlayView"

 type="android.gesture.GestureOverlayView"

 static="false"

 final="false"

 deprecated="not deprecated"

 visibility="public"

>

<parameter name="context" type="android.content.Context">

</parameter>

<parameter name="attrs" type="android.util.AttributeSet">

</parameter>

<parameter name="defStyle" type="int">

</parameter>

</constructor>

<method name="addOnGestureListener"

 return="void"

 abstract="false"
@@ -46653,6 +46667,19 @@ 
 visibility="public"

>

</method>

<method name="processEvent"

 return="void"

 abstract="false"

 native="false"

 synchronized="false"

 static="false"

 final="false"

 deprecated="not deprecated"

 visibility="public"

>

<parameter name="event" type="android.view.MotionEvent">

</parameter>

</method>

<method name="removeOnGestureListener"

 return="void"

 abstract="false"
@@ -46718,27 +46745,6 @@ 
<parameter name="color" type="int">

</parameter>

</method>

<field name="DEFAULT_GESTURE_COLOR"

 type="int"

 transient="false"

 volatile="false"

 value="-256"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="DEFAULT_UNCERTAIN_GESTURE_COLOR"

 type="int"

 transient="false"

 volatile="false"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

</class>

<interface name="GestureOverlayView.OnGestureListener"

 abstract="true"
@@ -159466,6 +159472,17 @@ 
 visibility="public"

>

</method>

<method name="getGestures"

 return="int"

 abstract="false"

 native="false"

 synchronized="false"

 static="false"

 final="false"

 deprecated="not deprecated"

 visibility="public"

>

</method>

<method name="getListPaddingBottom"

 return="int"

 abstract="false"
@@ -159839,6 +159856,19 @@ 
<parameter name="filterText" type="java.lang.String">

</parameter>

</method>

<method name="setGestures"

 return="void"

 abstract="false"

 native="false"

 synchronized="false"

 static="false"

 final="false"

 deprecated="not deprecated"

 visibility="public"

>

<parameter name="gestures" type="int">

</parameter>

</method>

<method name="setOnScrollListener"

 return="void"

 abstract="false"
@@ -159984,6 +160014,39 @@ 
<parameter name="dr" type="android.graphics.drawable.Drawable">

</parameter>

</method>

<field name="GESTURES_FILTER"

 type="int"

 transient="false"

 volatile="false"

 value="2"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="GESTURES_JUMP"

 type="int"

 transient="false"

 volatile="false"

 value="1"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="GESTURES_NONE"

 type="int"

 transient="false"

 volatile="false"

 value="0"

 static="true"

 final="true"

 deprecated="not deprecated"

 visibility="public"

>

</field>

<field name="TRANSCRIPT_MODE_ALWAYS_SCROLL"

 type="int"

 transient="false"
@@ -168608,6 +168671,21 @@ 
 deprecated="not deprecated"

 visibility="public"

>

<parameter name="width" type="int">

</parameter>

<parameter name="height" type="int">

</parameter>

</method>

<method name="update"

 return="void"

 abstract="false"

 native="false"

 synchronized="false"

 static="false"

 final="false"

 deprecated="not deprecated"

 visibility="public"

>

<parameter name="x" type="int">

</parameter>

<parameter name="y" type="int">

core/java/android/gesture/GestureOverlayView.java

+151 −94
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2008-2009 The Android Open Source Project

 * Copyright (C) 2009 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.
@@ -17,62 +17,54 @@ 
package android.gesture;



import android.content.Context;

import android.content.res.TypedArray;

import android.graphics.Bitmap;

import android.graphics.BlurMaskFilter;

import android.graphics.Canvas;

import android.graphics.Paint;

import android.graphics.Path;

import android.graphics.Rect;

import android.graphics.Color;

import android.os.Handler;

import android.util.AttributeSet;

import android.view.MotionEvent;

import android.view.View;

import android.view.animation.AnimationUtils;

import android.view.animation.AccelerateDecelerateInterpolator;

import com.android.internal.R;



import java.util.ArrayList;



/**

 * A (transparent) overlay for gesture input that can be placed on top of other

 * widgets. The view can also be opaque.

 * widgets.

 *

 * @attr ref android.R.styleable#GestureOverlayView_gestureStrokeWidth

 * @attr ref android.R.styleable#GestureOverlayView_gestureColor

 * @attr ref android.R.styleable#GestureOverlayView_uncertainGestureColor

 * @attr ref android.R.styleable#GestureOverlayView_fadeDuration

 * @attr ref android.R.styleable#GestureOverlayView_fadeOffset

 */



public class GestureOverlayView extends View {

    static final float TOUCH_TOLERANCE = 3;



    // TODO: Move all these values into XML attributes

    private static final int TRANSPARENT_BACKGROUND = 0x00000000;



    // TODO: SHOULD BE A TOTAL DURATION

    private static final float FADING_ALPHA_CHANGE = 0.15f;

    private static final long FADING_OFFSET = 300;

    private static final long FADING_REFRESHING_RATE = 16;



    private static final int GESTURE_STROKE_WIDTH = 12;

    private static final boolean GESTURE_RENDERING_ANTIALIAS = true;



    private static final boolean DITHER_FLAG = true;



    public static final int DEFAULT_GESTURE_COLOR = 0xFFFFFF00;

    public static final int DEFAULT_UNCERTAIN_GESTURE_COLOR = Color.argb(60, 255, 255, 0);



    private static final int REFRESH_RANGE = 10;



    private static final BlurMaskFilter BLUR_MASK_FILTER =

            new BlurMaskFilter(1, BlurMaskFilter.Blur.NORMAL);



    private Paint mGesturePaint;



    private final Paint mBitmapPaint = new Paint(Paint.DITHER_FLAG);

    private Bitmap mBitmap; // with transparent background

    private Bitmap mBitmap;

    private Canvas mBitmapCanvas;



    private int mCertainGestureColor = DEFAULT_GESTURE_COLOR;

    private int mUncertainGestureColor = DEFAULT_UNCERTAIN_GESTURE_COLOR;

    private long mFadeDuration = 300;

    private long mFadeOffset = 300;

    private long mFadingStart;



    // for rendering immediate ink feedback

    private Rect mInvalidRect = new Rect();

    private float mGestureStroke = 12.0f;

    private int mCertainGestureColor = 0xFFFFFF00;

    private int mUncertainGestureColor = 0x3CFFFF00;

    private int mInvalidateExtraBorder = 10;



    private Path mPath;

    // for rendering immediate ink feedback

    private final Rect mInvalidRect = new Rect();

    private final Path mPath = new Path();



    private float mX;

    private float mY;
@@ -84,26 +76,32 @@ public class GestureOverlayView extends View { 
    private Gesture mCurrentGesture = null;



    // TODO: Make this a list of WeakReferences

    private final ArrayList<OnGestureListener> mOnGestureListeners = new ArrayList<OnGestureListener>();

    private ArrayList<GesturePoint> mPointBuffer = null;

    private final ArrayList<OnGestureListener> mOnGestureListeners =

            new ArrayList<OnGestureListener>();

    private final ArrayList<GesturePoint> mPointBuffer = new ArrayList<GesturePoint>(100);



    // fading out effect

    private boolean mIsFadingOut = false;

    private float mFadingAlpha = 1;



    private Handler mHandler = new Handler();

    private final AccelerateDecelerateInterpolator mInterpolator =

            new AccelerateDecelerateInterpolator();



    private final Runnable mFadingOut = new Runnable() {

        public void run() {

            if (mIsFadingOut) {

                mFadingAlpha -= FADING_ALPHA_CHANGE;

                if (mFadingAlpha <= 0) {

                final long now = AnimationUtils.currentAnimationTimeMillis();

                final long duration = now - mFadingStart;



                if (duration > mFadeDuration) {

                    mIsFadingOut = false;

                    mPath = null;

                    mPath.rewind();

                    mCurrentGesture = null;

                    mBitmap.eraseColor(TRANSPARENT_BACKGROUND);

                } else {

                    mHandler.postDelayed(this, FADING_REFRESHING_RATE);

                    float interpolatedTime = Math.max(0.0f,

                            Math.min(1.0f, duration / (float) mFadeDuration));

                    mFadingAlpha = 1.0f - mInterpolator.getInterpolation(interpolatedTime);

                    postDelayed(this, 16);

                }

                invalidate();

            }
@@ -116,7 +114,27 @@ public class GestureOverlayView extends View { 
    }



    public GestureOverlayView(Context context, AttributeSet attrs) {

        super(context, attrs);

        this(context, attrs, com.android.internal.R.attr.gestureOverlayViewStyle);

    }



    public GestureOverlayView(Context context, AttributeSet attrs, int defStyle) {

        super(context, attrs, defStyle);



        TypedArray a = context.obtainStyledAttributes(attrs,

                R.styleable.GestureOverlayView, defStyle, 0);



        mGestureStroke = a.getFloat(R.styleable.GestureOverlayView_gestureStrokeWidth,

                mGestureStroke);

        mInvalidateExtraBorder = Math.max(1, ((int) mGestureStroke) - 1);

        mCertainGestureColor = a.getColor(R.styleable.GestureOverlayView_gestureColor,

                mCertainGestureColor);

        mUncertainGestureColor = a.getColor(R.styleable.GestureOverlayView_uncertainGestureColor,

                mUncertainGestureColor);

        mFadeDuration = a.getInt(R.styleable.GestureOverlayView_fadeDuration, (int) mFadeDuration);

        mFadeOffset = a.getInt(R.styleable.GestureOverlayView_fadeOffset, (int) mFadeOffset);



        a.recycle();



        init();

    }
@@ -139,6 +157,7 @@ public class GestureOverlayView extends View { 
            mBitmap.eraseColor(TRANSPARENT_BACKGROUND);

            mCurrentGesture.draw(mBitmapCanvas, mGesturePaint);

        }

        invalidate();

    }



    public void setGestureColor(int color) {
@@ -157,6 +176,16 @@ public class GestureOverlayView extends View { 
        return mCertainGestureColor;

    }



    public float getGestureStroke() {

        return mGestureStroke;

    }



    public void setGestureStroke(float gestureStroke) {

        mGestureStroke = gestureStroke;

        mInvalidateExtraBorder = Math.max(1, ((int) mGestureStroke) - 1);

        mGesturePaint.setStrokeWidth(mGestureStroke);

    }



    /**

     * Set the gesture to be shown in the view

     *
@@ -182,14 +211,12 @@ public class GestureOverlayView extends View { 


        final Paint gesturePaint = mGesturePaint;

        gesturePaint.setAntiAlias(GESTURE_RENDERING_ANTIALIAS);

        gesturePaint.setColor(DEFAULT_GESTURE_COLOR);

        gesturePaint.setColor(mCertainGestureColor);

        gesturePaint.setStyle(Paint.Style.STROKE);

        gesturePaint.setStrokeJoin(Paint.Join.ROUND);

        gesturePaint.setStrokeCap(Paint.Cap.ROUND);

        gesturePaint.setStrokeWidth(GESTURE_STROKE_WIDTH);

        gesturePaint.setStrokeWidth(mGestureStroke);

        gesturePaint.setDither(DITHER_FLAG);



        mPath = null;

    }



    @Override
@@ -226,6 +253,10 @@ public class GestureOverlayView extends View { 
        mOnGestureListeners.remove(listener);

    }



    public void removeAllOnGestureListeners() {

        mOnGestureListeners.clear();

    }



    @Override

    protected void onDraw(Canvas canvas) {

        super.onDraw(canvas);
@@ -240,10 +271,8 @@ public class GestureOverlayView extends View { 
        }



        // draw the current stroke

        if (mPath != null) {

        canvas.drawPath(mPath, mGesturePaint);

    }

    }



    /**

     * Clear up the overlay
@@ -253,12 +282,13 @@ public class GestureOverlayView extends View { 
     */

    public void clear(boolean fadeOut) {

        if (fadeOut) {

            mFadingAlpha = 1;

            mFadingAlpha = 1.0f;

            mIsFadingOut = true;

            mHandler.removeCallbacks(mFadingOut);

            mHandler.postDelayed(mFadingOut, FADING_OFFSET);

            removeCallbacks(mFadingOut);

            mFadingStart = AnimationUtils.currentAnimationTimeMillis() + mFadeOffset;

            postDelayed(mFadingOut, mFadeOffset);

        } else {

            mPath = null;

            mPath.rewind();

            mCurrentGesture = null;

            if (mBitmap != null) {

                mBitmap.eraseColor(TRANSPARENT_BACKGROUND);
@@ -269,7 +299,7 @@ public class GestureOverlayView extends View { 


    public void cancelFadingOut() {

        mIsFadingOut = false;

        mHandler.removeCallbacks(mFadingOut);

        removeCallbacks(mFadingOut);

    }



    @Override
@@ -278,6 +308,12 @@ public class GestureOverlayView extends View { 
            return true;

        }



        processEvent(event);



        return true;

    }



    public void processEvent(MotionEvent event) {

        switch (event.getAction()) {

            case MotionEvent.ACTION_DOWN:

                Rect rect = touchStart(event);
@@ -290,12 +326,14 @@ public class GestureOverlayView extends View { 
                }

                break;

            case MotionEvent.ACTION_UP:

                touchUp(event);

                touchUp(event, false);

                invalidate();

                break;

            case MotionEvent.ACTION_CANCEL:

                touchUp(event, true);

                invalidate();

                break;

        }



        return true;

    }



    private Rect touchStart(MotionEvent event) {
@@ -310,7 +348,7 @@ public class GestureOverlayView extends View { 
        // if there is fading out going on, stop it.

        if (mIsFadingOut) {

            mIsFadingOut = false;

            mHandler.removeCallbacks(mFadingOut);

            removeCallbacks(mFadingOut);

            mBitmap.eraseColor(TRANSPARENT_BACKGROUND);

            mCurrentGesture = null;

        }
@@ -325,14 +363,13 @@ public class GestureOverlayView extends View { 
            mCurrentGesture = new Gesture();

        }



        mPointBuffer = new ArrayList<GesturePoint>();

        mPointBuffer.add(new GesturePoint(x, y, event.getEventTime()));



        mPath = new Path();

        mPath.rewind();

        mPath.moveTo(x, y);



        mInvalidRect.set((int) x - REFRESH_RANGE, (int) y - REFRESH_RANGE,

                (int) x + REFRESH_RANGE, (int) y + REFRESH_RANGE);

        mInvalidRect.set((int) x - mInvalidateExtraBorder, (int) y - mInvalidateExtraBorder,

                (int) x + mInvalidateExtraBorder, (int) y + mInvalidateExtraBorder);

        

        mCurveEndX = x;

        mCurveEndY = y;
@@ -343,37 +380,48 @@ public class GestureOverlayView extends View { 
    private Rect touchMove(MotionEvent event) {

        Rect areaToRefresh = null;

        

        float x = event.getX();

        float y = event.getY();

        final float x = event.getX();

        final float y = event.getY();



        final float previousX = mX;

        final float previousY = mY;



        float dx = Math.abs(x - mX);

        float dy = Math.abs(y - mY);

        final float dx = Math.abs(x - previousX);

        final float dy = Math.abs(y - previousY);

        

        if (dx >= TOUCH_TOLERANCE || dy >= TOUCH_TOLERANCE) {

        if (dx >= GestureStroke.TOUCH_TOLERANCE || dy >= GestureStroke.TOUCH_TOLERANCE) {

            areaToRefresh = mInvalidRect;



            // start with the curve end

            mInvalidRect.set((int) mCurveEndX - REFRESH_RANGE, (int) mCurveEndY - REFRESH_RANGE,

                    (int) mCurveEndX + REFRESH_RANGE, (int) mCurveEndY + REFRESH_RANGE);

            areaToRefresh.set(

                    (int) mCurveEndX - mInvalidateExtraBorder,

                    (int) mCurveEndY - mInvalidateExtraBorder,

                    (int) mCurveEndX + mInvalidateExtraBorder,

                    (int) mCurveEndY + mInvalidateExtraBorder);

            

            mCurveEndX = (x + previousX) / 2;

            mCurveEndY = (y + previousY) / 2;



            mCurveEndX  = (x + mX) / 2;

            mCurveEndY = (y + mY) / 2;

            mPath.quadTo(mX, mY, mCurveEndX, mCurveEndY);

            mPath.quadTo(previousX, previousY, mCurveEndX, mCurveEndY);

            

            // union with the control point of the new curve

            mInvalidRect.union((int) mX - REFRESH_RANGE, (int) mY - REFRESH_RANGE,

                    (int) mX + REFRESH_RANGE, (int) mY + REFRESH_RANGE);

            areaToRefresh.union(

                    (int) previousX - mInvalidateExtraBorder,

                    (int) previousY - mInvalidateExtraBorder,

                    (int) previousX + mInvalidateExtraBorder,

                    (int) previousY + mInvalidateExtraBorder);

            

            // union with the end point of the new curve

            mInvalidRect.union((int) mCurveEndX - REFRESH_RANGE, (int) mCurveEndY - REFRESH_RANGE,

                    (int) mCurveEndX + REFRESH_RANGE, (int) mCurveEndY + REFRESH_RANGE);



            areaToRefresh = mInvalidRect;

            areaToRefresh.union(

                    (int) mCurveEndX - mInvalidateExtraBorder,

                    (int) mCurveEndY - mInvalidateExtraBorder,

                    (int) mCurveEndX + mInvalidateExtraBorder,

                    (int) mCurveEndY + mInvalidateExtraBorder);



            mX = x;

            mY = y;

        }





        mPointBuffer.add(new GesturePoint(x, y, event.getEventTime()));



        // pass the event to handlers
@@ -386,34 +434,43 @@ public class GestureOverlayView extends View { 
        return areaToRefresh;

    }



    private void touchUp(MotionEvent event) {

    private void touchUp(MotionEvent event, boolean cancel) {

        // add the stroke to the current gesture

        mCurrentGesture.addStroke(new GestureStroke(mPointBuffer));



        // add the stroke to the double buffer

        mGesturePaint.setMaskFilter(BLUR_MASK_FILTER);

        mBitmapCanvas.drawPath(mPath, mGesturePaint);

        mGesturePaint.setMaskFilter(null);



        if (!cancel) {

            // pass the event to handlers

            final ArrayList<OnGestureListener> listeners = mOnGestureListeners;

            final int count = listeners.size();

            for (int i = 0; i < count; i++) {

                listeners.get(i).onGestureEnded(this, event);

            }

        } else {

            // pass the event to handlers

            final ArrayList<OnGestureListener> listeners = mOnGestureListeners;

            final int count = listeners.size();

            for (int i = 0; i < count; i++) {

                listeners.get(i).onGestureCancelled(this, event);

            }

        }



        mPath = null;        

        mPointBuffer = null;

        mPath.rewind();

        mPointBuffer.clear();

    }



    /**

     * An interface for processing gesture events

     */

    public static interface OnGestureListener {

        public void onGestureStarted(GestureOverlayView overlay, MotionEvent event);

        void onGestureStarted(GestureOverlayView overlay, MotionEvent event);



        void onGesture(GestureOverlayView overlay, MotionEvent event);



        public void onGesture(GestureOverlayView overlay, MotionEvent event);

        void onGestureEnded(GestureOverlayView overlay, MotionEvent event);



        public void onGestureEnded(GestureOverlayView overlay, MotionEvent event);

        void onGestureCancelled(GestureOverlayView overlay, MotionEvent event);

    }

}

core/java/android/gesture/GestureStroke.java

+5 −3
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2008-2009 The Android Open Source Project

 * Copyright (C) 2009 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.
@@ -31,6 +31,8 @@ import java.util.ArrayList; 
 * A gesture stroke started on a touch down and ended on a touch up.

 */

public class GestureStroke {

    static final float TOUCH_TOLERANCE = 3;



    public final RectF boundingBox;



    public final float length;
@@ -156,8 +158,8 @@ public class GestureStroke { 
            } else {

                float dx = Math.abs(x - mX);

                float dy = Math.abs(y - mY);

                if (dx >= GestureOverlayView.TOUCH_TOLERANCE ||

                        dy >= GestureOverlayView.TOUCH_TOLERANCE) {

                if (dx >= TOUCH_TOLERANCE ||

                        dy >= TOUCH_TOLERANCE) {

                    path.quadTo(mX, mY, (x + mX) / 2, (y + mY) / 2);

                    mX = x;

                    mY = y;

core/java/android/gesture/LetterRecognizer.java

+38 −31
Original line number Diff line number Diff line
@@ -45,18 +45,16 @@ public class LetterRecognizer { 
    

    private GestureLibrary mGestureLibrary;



    private final Comparator<Prediction> mComparator = new PredictionComparator();



    private static class SigmoidUnit {

        final float[] mWeights;



        private boolean mComputed;

        private float mResult;



        SigmoidUnit(float[] weights) {

            mWeights = weights;

        }



        private float compute(float[] inputs) {

            if (!mComputed) {

            float sum = 0;



            final int count = inputs.length;
@@ -67,10 +65,7 @@ public class LetterRecognizer { 
            }

            sum += weights[weights.length - 1];



                mResult = 1.0f / (float) (1 + Math.exp(-sum));

                mComputed = true;

            }

            return mResult;

            return 1.0f / (float) (1 + Math.exp(-sum));

        }

    }
@@ -91,16 +86,25 @@ public class LetterRecognizer { 
    }



    public ArrayList<Prediction> recognize(Gesture gesture) {

        return recognize(gesture, null);

    }



    public ArrayList<Prediction> recognize(Gesture gesture, ArrayList<Prediction> predictions) {

        float[] query = GestureUtilities.spatialSampling(gesture, mPatchSize);

        ArrayList<Prediction> predictions = classify(query);

        predictions = classify(query, predictions);

        adjustPrediction(gesture, predictions);

        return predictions;

    }



    private ArrayList<Prediction> classify(float[] vector) {

    private ArrayList<Prediction> classify(float[] vector, ArrayList<Prediction> predictions) {

        if (predictions == null) {

            predictions = new ArrayList<Prediction>();

        } else {

            predictions.clear();

        }



        final float[] intermediateOutput = compute(mHiddenLayer, vector);

        final float[] output = compute(mOutputLayer, intermediateOutput);

        final ArrayList<Prediction> predictions = new ArrayList<Prediction>();



        double sum = 0;
@@ -117,19 +121,8 @@ public class LetterRecognizer { 
            predictions.get(i).score /= sum;

        }



        Collections.sort(predictions, new Comparator<Prediction>() {

            public int compare(Prediction object1, Prediction object2) {

                double score1 = object1.score;

                double score2 = object2.score;

                if (score1 > score2) {

                    return -1;

                } else if (score1 < score2) {

                    return 1;

                } else {

                    return 0;

                }

            }

        });

        Collections.sort(predictions, mComparator);



        return predictions;

    }
@@ -270,4 +263,18 @@ public class LetterRecognizer { 
            }

        }

    }



    private static class PredictionComparator implements Comparator<Prediction> {

        public int compare(Prediction object1, Prediction object2) {

            double score1 = object1.score;

            double score2 = object2.score;

            if (score1 > score2) {

                return -1;

            } else if (score1 < score2) {

                return 1;

            } else {

                return 0;

            }

        }

    }

}

core/java/android/gesture/TouchThroughGestureListener.java

+9 −2

File changed.

Preview size limit exceeded, changes collapsed.