AndroidStudio：手势识别

偏执的太偏执、 2022-02-23 10:07 353阅读 0赞

一内容：设计一个手写字体识别程序。

二实现

①建立一个存放手写字体的数据库

②activity\_main.xml

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".MainActivity"
        android:orientation="vertical">
    
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Gesture:"
            android:id="@+id/tv"
            android:textSize="24dp"/>
    
        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:textSize="20dp"
            android:text="clear"
            android:id="@+id/bt"/>
    
        <android.gesture.GestureOverlayView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gestureStrokeType="multiple"
            android:eventsInterceptionEnabled="false"
            android:orientation="vertical"
            android:id="@+id/gesture"></android.gesture.GestureOverlayView>
    </LinearLayout>

3.MainActivity.java

package com.example.myapplication;
    
    import android.gesture.Gesture;
    import android.gesture.GestureLibraries;
    import android.gesture.GestureLibrary;
    import android.gesture.GestureOverlayView;
    import android.gesture.Prediction;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.Button;
    import android.widget.TextView;
    import android.widget.Toast;
    
    import java.util.ArrayList;
    
    public class MainActivity extends AppCompatActivity implements GestureOverlayView.OnGesturePerformedListener {
        GestureLibrary mLibrary;  //定义手势库对象
        GestureOverlayView gest;  //定义手势视图对象做画板之用
        TextView txt;
        Button bt;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
    
            gest = (GestureOverlayView)findViewById(R.id.gesture);
            gest.addOnGesturePerformedListener(this);  // 注册手势识别的监听器
            txt = (TextView)findViewById(R.id.tv);
            mLibrary = GestureLibraries.fromRawResource(this,R.raw.gestures);  //加载手势库
            bt = (Button)findViewById(R.id.bt);
            bt.setOnClickListener(new Click());
    
            if (!mLibrary.load()) {
                finish();
            }
        }
            /*根据画的手势识别是否匹配手势库里的手势*/
        @Override
        public void onGesturePerformed(GestureOverlayView gest, Gesture gesture) {
            ArrayList gestList = mLibrary.recognize(gesture);  // 从手势库获取手势数据
            if (gestList.size() > 0) {
                Prediction pred = (Prediction)gestList.get(0);
               if (pred.score > 1.0) {    // 检索到匹配的手势
                   Toast.makeText(this,pred.name,Toast.LENGTH_SHORT).show();
                   txt.append(pred.name);
               }
            }
        }
    
        private class Click implements View.OnClickListener {
            @Override
            public void onClick(View view) {
                txt.setText("Gesture:");
            }
        }
    }

三效果

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDE0MTQ3Mw_size_16_color_FFFFFF_t_70][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDE0MTQ3Mw_size_16_color_FFFFFF_t_70]: /images/20220223/da42e7f308464252aa4626a97b0c41b7.png