多点触控测试代码 PointerLocation

PointerLocation这个多点触控测试程序，在android的源码中有，只包括下面的两个文件，

android\development\apps\Development\src\com\android\development\PointerLocation.java

android\frameworks\base\core\java\com\android\internal\widget\PointerLocationView.java

新建个工程，只要将这两个文件拷贝出来，修改下包名，就可以运行起来，真好用。

PointerLocation.java

package com.ckl.PointerLocation;

import android.app.Activity;
import android.os.Bundle;
import android.view.WindowManager;

/**
 * Demonstrates wrapping a layout in a ScrollView.
 *
 */
public class PointerLocation extends Activity {
    @Override
    protected void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        setContentView(new PointerLocationView(this));
        
        // Make the screen full bright for this activity.
        WindowManager.LayoutParams lp = getWindow().getAttributes();
        lp.screenBrightness = 1.0f;
        getWindow().setAttributes(lp);
    }
}

PointerLocationView.java

/*
 * Copyright (C) 2010 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.ckl.PointerLocation;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Paint.FontMetricsInt;
import android.util.Log;
import android.view.MotionEvent;
import android.view.VelocityTracker;
import android.view.View;
import android.view.ViewConfiguration;

import java.util.ArrayList;

public class PointerLocationView extends View {
    public static class PointerState {
        private final ArrayList mXs = new ArrayList();
        private final ArrayList mYs = new ArrayList();
        private boolean mCurDown;
        private int mCurX;
        private int mCurY;
        private float mCurPressure;
        private float mCurSize;
        private int mCurWidth;
        private VelocityTracker mVelocity;
    }

    private final ViewConfiguration mVC;
    private final Paint mTextPaint;
    private final Paint mTextBackgroundPaint;
    private final Paint mTextLevelPaint;
    private final Paint mPaint;
    private final Paint mTargetPaint;
    private final Paint mPathPaint;
    private final FontMetricsInt mTextMetrics = new FontMetricsInt();
    private int mHeaderBottom;
    private boolean mCurDown;
    private int mCurNumPointers;
    private int mMaxNumPointers;
    private final ArrayList mPointers
             = new ArrayList();
    
    private boolean mPrintCoords = true;
    
    public PointerLocationView(Context c) {
        super(c);
        setFocusable(true);
        mVC = ViewConfiguration.get(c);
        mTextPaint = new Paint();
        mTextPaint.setAntiAlias(true);
        mTextPaint.setTextSize(10
                * getResources().getDisplayMetrics().density);
        mTextPaint.setARGB(255, 0, 0, 0);
        mTextBackgroundPaint = new Paint();
        mTextBackgroundPaint.setAntiAlias(false);
        mTextBackgroundPaint.setARGB(128, 255, 255, 255);
        mTextLevelPaint = new Paint();
        mTextLevelPaint.setAntiAlias(false);
        mTextLevelPaint.setARGB(192, 255, 0, 0);
        mPaint = new Paint();
        mPaint.setAntiAlias(true);
        mPaint.setARGB(255, 255, 255, 255);
        mPaint.setStyle(Paint.Style.STROKE);
        mPaint.setStrokeWidth(2);
        mTargetPaint = new Paint();
        mTargetPaint.setAntiAlias(false);
        mTargetPaint.setARGB(255, 0, 0, 192);
        mPathPaint = new Paint();
        mPathPaint.setAntiAlias(false);
        mPathPaint.setARGB(255, 0, 96, 255);
        mPaint.setStyle(Paint.Style.STROKE);
        mPaint.setStrokeWidth(1);
        
        PointerState ps = new PointerState();
        ps.mVelocity = VelocityTracker.obtain();
        mPointers.add(ps);
    }

    public void setPrintCoords(boolean state) {
        mPrintCoords = state;
    }
    
    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        mTextPaint.getFontMetricsInt(mTextMetrics);
        mHeaderBottom = -mTextMetrics.ascent+mTextMetrics.descent+2;
        if (false) {
            Log.i("foo", "Metrics: ascent=" + mTextMetrics.ascent
                    + " descent=" + mTextMetrics.descent
                    + " leading=" + mTextMetrics.leading
                    + " top=" + mTextMetrics.top
                    + " bottom=" + mTextMetrics.bottom);
        }
    }

    @Override
    protected void onDraw(Canvas canvas) {
        synchronized (mPointers) {
            final int w = getWidth();
            final int itemW = w/7;
            final int base = -mTextMetrics.ascent+1;
            final int bottom = mHeaderBottom;
            
            final int NP = mPointers.size();
            
            if (NP > 0) {
                final PointerState ps = mPointers.get(0);
                canvas.drawRect(0, 0, itemW-1, bottom,mTextBackgroundPaint);
                canvas.drawText("P: " + mCurNumPointers + " / " + mMaxNumPointers,
                        1, base, mTextPaint);
                
                final int N = ps.mXs.size();
                if ((mCurDown && ps.mCurDown) || N == 0) {
                    canvas.drawRect(itemW, 0, (itemW * 2) - 1, bottom, mTextBackgroundPaint);
                    canvas.drawText("X: " + ps.mCurX, 1 + itemW, base, mTextPaint);
                    canvas.drawRect(itemW * 2, 0, (itemW * 3) - 1, bottom, mTextBackgroundPaint);
                    canvas.drawText("Y: " + ps.mCurY, 1 + itemW * 2, base, mTextPaint);
                } else {
                    float dx = ps.mXs.get(N-1) - ps.mXs.get(0);
                    float dy = ps.mYs.get(N-1) - ps.mYs.get(0);
                    canvas.drawRect(itemW, 0, (itemW * 2) - 1, bottom,
                            Math.abs(dx) < mVC.getScaledTouchSlop()
                            ? mTextBackgroundPaint : mTextLevelPaint);
                    canvas.drawText("dX: " + String.format("%.1f", dx), 1 + itemW, base, mTextPaint);
                    canvas.drawRect(itemW * 2, 0, (itemW * 3) - 1, bottom,
                            Math.abs(dy) < mVC.getScaledTouchSlop()
                            ? mTextBackgroundPaint : mTextLevelPaint);
                    canvas.drawText("dY: " + String.format("%.1f", dy), 1 + itemW * 2, base, mTextPaint);
                }
                
                canvas.drawRect(itemW * 3, 0, (itemW * 4) - 1, bottom, mTextBackgroundPaint);
                int velocity = ps.mVelocity == null ? 0 : (int) (ps.mVelocity.getXVelocity() * 1000);
                canvas.drawText("Xv: " + velocity, 1 + itemW * 3, base, mTextPaint);
                
                canvas.drawRect(itemW * 4, 0, (itemW * 5) - 1, bottom, mTextBackgroundPaint);
                velocity = ps.mVelocity == null ? 0 : (int) (ps.mVelocity.getYVelocity() * 1000);
                canvas.drawText("Yv: " + velocity, 1 + itemW * 4, base, mTextPaint);
                
                canvas.drawRect(itemW * 5, 0, (itemW * 6) - 1, bottom, mTextBackgroundPaint);
                canvas.drawRect(itemW * 5, 0, (itemW * 5) + (ps.mCurPressure * itemW) - 1,
                        bottom, mTextLevelPaint);
                canvas.drawText("Prs: " + String.format("%.2f", ps.mCurPressure), 1 + itemW * 5,
                        base, mTextPaint);
                
                canvas.drawRect(itemW * 6, 0, w, bottom, mTextBackgroundPaint);
                canvas.drawRect(itemW * 6, 0, (itemW * 6) + (ps.mCurSize * itemW) - 1,
                        bottom, mTextLevelPaint);
                canvas.drawText("Size: " + String.format("%.2f", ps.mCurSize), 1 + itemW * 6,
                        base, mTextPaint);
            }
            
            for (int p=0; p> MotionEvent.ACTION_POINTER_INDEX_SHIFT;
                final int id = event.getPointerId(index);
                while (NP <= id) {
                    PointerState ps = new PointerState();
                    ps.mVelocity = VelocityTracker.obtain();
                    mPointers.add(ps);
                    NP++;
                }
                final PointerState ps = mPointers.get(id);
                ps.mVelocity = VelocityTracker.obtain();
                ps.mCurDown = true;
                if (mPrintCoords) {
                    Log.i("Pointer", "Pointer " + (id+1) + ": DOWN");
                }
            }
            
            final int NI = event.getPointerCount();
            
            mCurDown = action != MotionEvent.ACTION_UP
                    && action != MotionEvent.ACTION_CANCEL;
            mCurNumPointers = mCurDown ? NI : 0;
            if (mMaxNumPointers < mCurNumPointers) {
                mMaxNumPointers = mCurNumPointers;
            }
            
            for (int i=0; i> MotionEvent.ACTION_POINTER_INDEX_SHIFT;
                final int id = event.getPointerId(index);
                final PointerState ps = mPointers.get(id);
                ps.mXs.add(Float.NaN);
                ps.mYs.add(Float.NaN);
                ps.mCurDown = false;
                if (mPrintCoords) {
                    Log.i("Pointer", "Pointer " + (id+1) + ": UP");
                }
            }
            
            if (action == MotionEvent.ACTION_UP) {
                for (int i=0; i

工程源码  PointerLocation.7z