我正在通过Android的手势进行手写字母检测的示例工作。当我一次输入 1个字符时效果很好。这意味着当我通过手势在屏幕上写 A 时,程序会很好地识别它(因为我之前将它放在手势库上)。截至目前,我的代码就像这样。
public void onGesturePerformed(GestureOverlayView overlay, Gesture gesture) {
ArrayList<Prediction> predictions = gLib.recognize(gesture);
if (predictions.size() > 0 && predictions.get(0).score > 1.0) {
String letter = predictions.get(0).name;
Toast.makeText(this, letter, Toast.LENGTH_SHORT).show();
if(letter.contains("A")) //when matches i print it to edittext
edittext.setText("A");
.
. //rest of stuff here like previous way
.
}
}
但我的标准不是那样。我想认识一个字。我想一次写一个单词。
在为每个成功的比赛写一个单词时,相应的字母应该像edit一样打印在edittext上。
A,N,D,R,O,I,D
所以我的问题是如何才能获得它?是否可以分割手势(在写作时对单词进行分段)?任何有效的代码示例或链接都将受到赞赏。
答案 0 :(得分:4)
如果您将单词写成单独的字母(即不是草书),如问题中给出的图像所示。然后只需这样做 -
public void onGesturePerformed(GestureOverlayView overlay, Gesture gesture) {
ArrayList<Prediction> predictions = gLib.recognize(gesture);
if (predictions.size() > 0) {
Prediction prediction = predictions.get(0);
String letter = prediction.name;
if (prediction.score > 1.0) {
edittext.setText(edittext.getText().toString() + letter);
}
}
}
本质上是将新字母附加到现有的edittext字符串。
但如果你在谈论草书写作,那就太复杂了。这是一些可以跟踪草书写作的代码。
public class MainActivity extends Activity {
private Handler mHandler;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
@Override
protected void onResume() {
super.onResume();
Tracker t = new Tracker();
t.start();
}
@Override
protected void onPause() {
if (mHandler != null)
mHandler.getLooper().quit();
super.onPause();
}
@Override
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_MOVE:
if (mHandler != null) {
Message msg = Message.obtain();
msg.obj = event.getX() + "," + event.getY();
mHandler.sendMessage(msg);
}
break;
}
return true;
}
private class Tracker extends Thread {
private static final int LETTER_SIZE = 30;
private GestureLibrary gLib;
private ArrayList<GesturePoint> points;
public Tracker() {
points = new ArrayList<GesturePoint>();
gLib = GestureLibraries.fromRawResource(MainActivity.this, R.raw.gestures);
gLib.load();
}
@Override
public void run() {
Looper.prepare();
mHandler = new Handler() {
public void handleMessage(Message msg) {
String[] pos = String.valueOf(msg.obj).split(",");
points.add(new GesturePoint(Float.parseFloat(pos[0]), Float.parseFloat(pos[1]), System.currentTimeMillis()));
if (points.size() < LETTER_SIZE) return;
GestureStroke stroke = new GestureStroke(points);
Gesture gesture = new Gesture();
gesture.addStroke(stroke);
ArrayList<Prediction> predictions = gLib.recognize(gesture);
if (predictions.size() > 0) {
Prediction prediction = predictions.get(0);
String letter = prediction.name;
if (prediction.score > 1.0) {
Log.e("Found", letter);
points.clear();
}
}
}
};
Looper.loop();
}
}
}
所以基本上我们捕捉触摸位置并从中创建一个Gesture,它传递给GestureLibrary的recogn()方法。如果识别出手势,则我们将其打印并清除触摸位置,以便可以识别新的字母。