GestureOverlayView 初体验之手势识别

今天完成了在慕课网Android视频课程的最后一课GestureOverlayView



下面先上效果



一共三个手势，至于如何绘制手势感兴趣的同学可以去查询资料，这边就上过程

将之前设置的gesture文件先导入到项目中：res下新建文件夹raw



MainActivity.class

package com.superxingyun.gestureoverlayviewdemo;

import android.gesture.Gesture;
import android.gesture.GestureLibraries;
import android.gesture.GestureLibrary;
import android.gesture.GestureOverlayView;
import android.gesture.Prediction;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.Toast;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
GestureOverlayView gestureOverlayView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

gestureOverlayView = (GestureOverlayView) findViewById(R.id.gesture);
/**
* 1、找到刚才预设定的文件
* 2、加载文件中的所有手势
* 3、匹配、识别
*/
//从资源文件中将手势文件加载进来
final GestureLibrary librarie = GestureLibraries.fromRawResource(MainActivity.this, R.raw.gestures);
librarie.load();

gestureOverlayView.addOnGesturePerformedListener(new GestureOverlayView.OnGesturePerformedListener() {
@Override
public void onGesturePerformed(GestureOverlayView gestureOverlayView, Gesture gesture) {
//读出手势库中的内容  识别手势
ArrayList<Prediction> mygesture = librarie.recognize(gesture);
Prediction p = mygesture.get(0);
if (p.score >= 2.0){
if (p.name.equals("exit")){
finish();
}if (p.name.equals("next")){
Toast.makeText(MainActivity.this, "下一首", Toast.LENGTH_SHORT).show();
}if (p.name.equals("previous")){
Toast.makeText(MainActivity.this, "上一首", Toast.LENGTH_SHORT).show();
}

}else {
Toast.makeText(MainActivity.this, "无法匹配手势", Toast.LENGTH_SHORT).show();
}
}
});
}
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.superxingyun.gestureoverlayviewdemo.MainActivity">

<android.gesture.GestureOverlayView
android:id="@+id/gesture"
android:layout_width="match_parent"
android:layout_height="match_parent">

<ImageView
android:id="@+id/imageView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
app:srcCompat="@mipmap/ic_launcher" />

</android.gesture.GestureOverlayView>

</RelativeLayout>

这边还有几个GestureOverlayView常用的属性