通过GestureOverlayView手势库来识别手写的字

最新推荐文章于 2023-12-29 16:34:48 发布

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最新推荐文章于 2023-12-29 16:34:48 发布

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本文介绍了一个基于Android平台的手势识别应用程序实现过程。该应用能够捕捉用户的手势，并将其转化为可视化的图片显示出来，同时还能与预设的手势库进行比对，识别相似的手势并反馈给用户。

MainActivity 文件

package qianfeng.gesture;

import android.gesture.Gesture;
import android.gesture.GestureLibraries;
import android.gesture.GestureLibrary;
import android.gesture.GestureOverlayView;
import android.gesture.Prediction;
import android.graphics.Bitmap;
import android.graphics.Color;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.ImageView;

import java.io.File;
import java.util.ArrayList;

public class Main4Activity extends AppCompatActivity {

    private static final String TAG = "Main4Activity";
    private GestureOverlayView mGestureOverlay;
    private ImageView mImage1,mImage2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main4);
        mGestureOverlay = (GestureOverlayView) findViewById(R.id.overlay);
        mImage1 = (ImageView) findViewById(R.id.images1);
        mImage2 = (ImageView) findViewById(R.id.images2);


        mGestureOverlay.addOnGesturePerformedListener(new GestureOverlayView.OnGesturePerformedListener() {
            @Override
            public void onGesturePerformed(GestureOverlayView overlay, Gesture gesture) {
                //将手势转换成图片显示
                Bitmap bitmap = gesture.toBitmap(100,100,10, Color.BLUE);
                mImage1.setImageBitmap(bitmap);
                GestureLibrary libraries = GestureLibraries.fromFile(Environment.getExternalStorageDirectory().getAbsolutePath()+"/getsure");
                //加载手势库
                if(libraries.load()){
                    Log.e(TAG,"load");
                }else{
                    Log.e(TAG,"load error");
                }
                //返回的一堆 相近的手势
                ArrayList<Prediction> recognize = libraries.recognize(gesture);

                //判断相似度
                if(recognize.size()>0){
                    for (Prediction prediction : recognize){
                        Log.e(TAG,prediction.score+"");
                        //且当 相似度大于10
                        if(prediction.score>10.0f){
                            //手势库通过名称 获取该名称下的所有手势
                            ArrayList<Gesture> gestures = libraries.getGestures(prediction.name);
                            //由于我们的手势 使用的唯一名称 所以只需要判断大于0 获取第0个 就可以
                            if(gestures.size()>0){
                                Gesture gesture_temp = gestures.get(0);
                                Bitmap bitmap1 = gesture_temp.toBitmap(100, 100, 10, Color.RED);
                                mImage2.setImageBitmap(bitmap1);
                            }
                        }
                    }
                }


                //添加手势到库
                libraries.addGesture(String.valueOf(System.currentTimeMillis()),gesture);
                //保存手势
                libraries.save();
            }
        });
    }
}

布局文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.qf.gestureoverlayview.MainActivity">


    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        >
        <ImageView
            android:background="#400f"
            android:id="@+id/img1"
            android:layout_weight="1"
            android:layout_width="0dp"
            android:layout_height="match_parent" />
        <ImageView
            android:id="@+id/img2"
            android:layout_weight="1"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            />

    </LinearLayout>

    <android.gesture.GestureOverlayView
        android:background="#000"
        android:id="@+id/gest"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:gestureStrokeType="multiple"
      android:gestureStrokeLengthThreshold="2"
        ></android.gesture.GestureOverlayView>
</LinearLayout>