Android Open Source - android Linear Layout Soft Keyboard Detect

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package org.apache.cordova;

import org.apache.cordova.LOG;

import android.content.Context;
//import android.view.View.MeasureSpec;
import android.widget.LinearLayout;

 * This class is used to detect when the soft keyboard is shown and hidden in the web view.
public class LinearLayoutSoftKeyboardDetect extends LinearLayout {

    private static final String TAG = "SoftKeyboardDetect";

    private int oldHeight = 0;  // Need to save the old height as not to send redundant events
    private int oldWidth = 0; // Need to save old width for orientation change
    private int screenWidth = 0;
    private int screenHeight = 0;
    private CordovaActivity app = null;

    public LinearLayoutSoftKeyboardDetect(Context context, int width, int height) {
        screenWidth = width;
        screenHeight = height;
        app = (CordovaActivity) context;

     * Start listening to new measurement events.  Fire events when the height
     * gets smaller fire a show keyboard event and when height gets bigger fire
     * a hide keyboard event.
     * Note: We are using app.postMessage so that this is more compatible with the API
     * @param widthMeasureSpec
     * @param heightMeasureSpec
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);

        LOG.v(TAG, "We are in our onMeasure method");

        // Get the current height of the visible part of the screen.
        // This height will not included the status bar.\
        int width, height;

        height = MeasureSpec.getSize(heightMeasureSpec);
        width = MeasureSpec.getSize(widthMeasureSpec);
        LOG.v(TAG, "Old Height = %d", oldHeight);
        LOG.v(TAG, "Height = %d", height);
        LOG.v(TAG, "Old Width = %d", oldWidth);
        LOG.v(TAG, "Width = %d", width);

        // If the oldHeight = 0 then this is the first measure event as the app starts up.
        // If oldHeight == height then we got a measurement change that doesn't affect us.
        if (oldHeight == 0 || oldHeight == height) {
            LOG.d(TAG, "Ignore this event");
        // Account for orientation change and ignore this event/Fire orientation change
        else if (screenHeight == width)
            int tmp_var = screenHeight;
            screenHeight = screenWidth;
            screenWidth = tmp_var;
            LOG.v(TAG, "Orientation Change");
        // If the height as gotten bigger then we will assume the soft keyboard has
        // gone away.
        else if (height > oldHeight) {
            if (app != null)
        // If the height as gotten smaller then we will assume the soft keyboard has 
        // been displayed.
        else if (height < oldHeight) {
            if (app != null)

        // Update the old height for the next event
        oldHeight = height;
        oldWidth = width;


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