Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.os.SystemClock;
import android.view.MotionEvent;
import android.view.MotionEvent.PointerCoords;
import android.view.MotionEvent.PointerProperties;

public class Main {
    public static MotionEvent CreateMotionEventFromJSonObject(JSONObject jObj) throws JSONException {
        long uptime = SystemClock.uptimeMillis();
        //get pointer infos
        JSONArray array = jObj.optJSONArray("pointers");
        int arrlen = array != null ? array.length() : 1;
        PointerProperties[] props = new PointerProperties[arrlen];
        PointerCoords[] coords = new PointerCoords[arrlen];

        if (array != null) {
            for (int i = 0; i < array.length(); i++) {
                PointerProperties prop = new PointerProperties();
                PointerCoords coord = new PointerCoords();
                PointerValuesFromJSonObj(prop, coord, array.getJSONObject(i));
                props[i] = prop;
                coords[i] = coord;
            }
        } else {
            JSONObject pointer = jObj.optJSONObject("pointers");
            if (pointer != null) {
                PointerProperties prop = new PointerProperties();
                PointerCoords coord = new PointerCoords();
                PointerValuesFromJSonObj(prop, coord, pointer);
                props[0] = prop;
                coords[0] = coord;
            }
        }
        long downTimeOffset = jObj.getLong("eventTime") - jObj.getLong("downTime");
        /* TODO calculating the time offset is not a goog solution. the downtime should be the same of all events in a row.
         * for an optimal use the events should be traced. then at the first occurency both down and event time
         * are set from uptime. and then in the follow up events the uptime is used for event time and the stored downtime 
         * for the downtime. but for this some identification of events is needed. 
         * first events can be identified with (eventTime == downTime)
         * */

        MotionEvent event = MotionEvent.obtain(uptime - downTimeOffset, uptime, jObj.getInt("action"),
                jObj.getInt("pointerCount"), props, coords, jObj.getInt("metaState"), jObj.getInt("buttonState"),
                (float) jObj.getDouble("xPrecision"), (float) jObj.getDouble("yPrecision"), jObj.getInt("deviceId"),
                jObj.getInt("edgeFlags"), jObj.getInt("source"), jObj.getInt("flags"));
        return event;
    }

    public static void PointerValuesFromJSonObj(PointerProperties outProp, PointerCoords outCoords, JSONObject jObj)
            throws JSONException {
        outProp.id = jObj.getInt("id");
        outProp.toolType = jObj.getInt("toolType");

        outCoords.orientation = (float) jObj.getDouble("orientation");
        outCoords.pressure = (float) jObj.getDouble("pressure");
        outCoords.size = (float) jObj.getDouble("size");
        outCoords.toolMajor = (float) jObj.getDouble("toolMajor");
        outCoords.toolMinor = (float) jObj.getDouble("toolMinor");
        outCoords.touchMajor = (float) jObj.getDouble("touchMajor");
        outCoords.touchMinor = (float) jObj.getDouble("touchMinor");
        outCoords.x = (float) jObj.getDouble("x");
        outCoords.y = (float) jObj.getDouble("y");
    }
}