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/*
* Copyright (C) 2008-2009 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.
* 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.android.gesture.example;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.os.Environment;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.Spinner;
import android.widget.AdapterView.OnItemSelectedListener;
import android.gesture.Gesture;
import android.gesture.GestureLibrary;
import android.gesture.GestureOverlayView;
import android.gesture.Prediction;
import java.io.File;
import java.util.ArrayList;
public class GestureEntry extends Activity {
private static final String PARCEL_KEY = "gesture";
static final String GESTURE_FILE_NAME = Environment.getExternalStorageDirectory().getAbsolutePath()
+ File.separator + "demo_library.gestures";
private static final int DIALOG_NEW_ENTRY = 1;
private static final int NEW_ID = Menu.FIRST;
private static final int VIEW_ID = Menu.FIRST + 1;
private GestureOverlayView mGesturePad;
private Spinner mRecognitionResult;
private GestureLibrary mGestureLibrary;
private boolean mChangedByRecognizer = false;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.demo);
// init the gesture library
mGestureLibrary = new GestureLibrary(GESTURE_FILE_NAME);
mGestureLibrary.load();
// create the spinner for showing the recognition results
// the spinner also allows a user to correct a prediction
mRecognitionResult = (Spinner) findViewById(R.id.spinner);
mRecognitionResult.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
// correct the recognition result by adding the new example
if (!mChangedByRecognizer) {
mGestureLibrary.addGesture(parent.getSelectedItem().toString(), mGesturePad
.getCurrentGesture());
} else {
mChangedByRecognizer = false;
}
}
public void onNothingSelected(AdapterView<?> parent) {
}
});
// create the area for drawing a gesture
mGesturePad = (GestureOverlayView) findViewById(R.id.drawingpad);
mGesturePad.setBackgroundColor(Color.BLACK);
mGesturePad.addOnGestureListener(new GestureOverlayView.OnGestureListener() {
public void onGestureEnded(GestureOverlayView overlay, MotionEvent event) {
recognize(overlay.getCurrentGesture());
}
public void onGesture(GestureOverlayView overlay, MotionEvent event) {
}
public void onGestureStarted(GestureOverlayView overlay, MotionEvent event) {
overlay.clear(false);
}
public void onGestureCancelled(GestureOverlayView overlay, MotionEvent event) {
}
});
if (savedInstanceState != null) {
Gesture gesture = (Gesture) savedInstanceState.getParcelable(PARCEL_KEY);
if (gesture != null) {
mGesturePad.setCurrentGesture(gesture);
}
}
}
@Override
protected Dialog onCreateDialog(int id) {
LayoutInflater factory = LayoutInflater.from(this);
final View textEntryView = factory.inflate(R.layout.newgesture_dialog, null);
return new AlertDialog.Builder(GestureEntry.this).setTitle(
R.string.newgesture_text_entry).setView(textEntryView).setPositiveButton(
R.string.newgesture_dialog_ok, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
EditText edittext = (EditText) ((AlertDialog) dialog)
.findViewById(R.id.gesturename_edit);
String text = edittext.getText().toString().trim();
if (text.length() > 0) {
mGestureLibrary.addGesture(text, mGesturePad.getCurrentGesture());
}
}
}).setNegativeButton(R.string.newgesture_dialog_cancel,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
}
}).create();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
menu.add(0, NEW_ID, 0, R.string.newgesture).setShortcut('0', 'n').setIcon(
android.R.drawable.ic_menu_add);
menu.add(0, VIEW_ID, 0, R.string.viewgesture).setShortcut('1', 'v').setIcon(
android.R.drawable.ic_menu_view);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case NEW_ID:
if (mGesturePad.getCurrentGesture() != null) {
showDialog(DIALOG_NEW_ENTRY);
}
break;
case VIEW_ID:
startActivityForResult(new Intent(this, GestureLibViewer.class), VIEW_ID);
break;
}
return super.onOptionsItemSelected(item);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
mGestureLibrary.load();
mGesturePad.clear(false);
}
@Override
protected void onPause() {
super.onPause();
mGestureLibrary.save();
}
@Override
protected void onPrepareDialog(int id, Dialog dialog) {
super.onPrepareDialog(id, dialog);
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
Gesture gesture = mGesturePad.getCurrentGesture();
if (gesture != null) {
outState.putParcelable(PARCEL_KEY, gesture);
}
mGestureLibrary.save();
}
private void recognize(Gesture gesture) {
mChangedByRecognizer = true;
ArrayList<Prediction> predictions = mGestureLibrary.recognize(gesture);
ArrayAdapter<Prediction> adapter = new ArrayAdapter<Prediction>(this,
android.R.layout.simple_spinner_item, predictions);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
mRecognitionResult.setAdapter(adapter);
}
}
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