Android手势操作(三)

mainActivity如下:

package cn.c;import java.io.File;import java.util.ArrayList;import java.util.Set;import android.app.Activity;import android.gesture.Gesture;import android.gesture.GestureLibraries;import android.gesture.GestureLibrary;import android.gesture.GestureOverlayView;import android.gesture.GestureOverlayView.OnGestureListener;import android.gesture.Prediction;import android.os.Bundle;import android.os.Environment;import android.view.KeyEvent;import android.view.MotionEvent;import android.view.View;import android.view.View.OnClickListener;import android.view.View.OnKeyListener;import android.widget.Button;import android.widget.EditText;import android.widget.Toast;/** * 需求描述: * 绘制手势,如已经存在则提示;不存在则可保存 * 该例子是Android手势识别(一)(二)的综合 * 遇到的问题: * 利用mGestureOverlayView.clear(true)不能清除手势. * 解决办法: * mGestureOverlayView.clear(true) * mGestureOverlayView.cancelGesture(); *  */public class MainActivity extends Activity {    private EditText mEditText;    private GestureOverlayView mGestureOverlayView;    private GestureLibrary mGestureLibrary;    private Gesture mGesture;    private Button mSaveButton;    private Button mResetButton;    private String mGestureLibraryPath;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        init();    }private void init() {mEditText = (EditText) findViewById(R.id.editText);mEditText.setOnKeyListener(new OnKeyListener() {public boolean onKey(View v, int keyCode, KeyEvent event) {if (mGesture!=null&&mEditText.getText().toString().length()>0) {mSaveButton.setEnabled(true);} else {mSaveButton.setEnabled(false);}return false;}});mGestureOverlayView = (GestureOverlayView) findViewById(R.id.gestureOverlayView);mSaveButton = (Button) findViewById(R.id.saveButton);mSaveButton.setOnClickListener(new ButtonOnClickListenerImpl());mSaveButton.setEnabled(false);mResetButton = (Button) findViewById(R.id.resetButton);mResetButton.setOnClickListener(new ButtonOnClickListenerImpl());//GestureLibrary文件的路径mGestureLibraryPath =Environment.getExternalStorageDirectory()+File.separator+"gestures9527";//为GestureOverlayView添加监听事件//多笔监听mGestureOverlayView.addOnGestureListener(new GestureListenerImpl());}private class GestureListenerImpl implements OnGestureListener{//开始绘制手势public void onGestureStarted(GestureOverlayView overlay,MotionEvent event) {mSaveButton.setEnabled(false);mGesture=null;}public void onGesture(GestureOverlayView overlay, MotionEvent event) {}        //手势绘制结束public void onGestureEnded(GestureOverlayView overlay, MotionEvent event) {boolean isSaved = false;mGesture = mGestureOverlayView.getGesture();mGestureLibrary = GestureLibraries.fromFile(mGestureLibraryPath);if (mGestureLibrary.load()) {ArrayList<Prediction> predictionsList = mGestureLibrary.recognize(mGesture);if (predictionsList.size() > 0) {System.out.println("xxxx1111 开始对比");Prediction bestPrediction = predictionsList.get(0);if (bestPrediction.score > 5.0) {isSaved = true;mGestureOverlayView.clear(true);mGestureOverlayView.cancelGesture();mSaveButton.setEnabled(false);mEditText.setText("");Toast.makeText(MainActivity.this, "手势已存在",Toast.LENGTH_SHORT).show();}} else {isSaved = false;System.out.println("xxxx1111 手势不存在");}} else {System.out.println("xxxxx 1111手势库打开失败");}// 1 手势不为空// 2 手势名正确// 3 手势未保存// 保存手势if (mGesture != null && mEditText.getText().toString().length() > 0&& !isSaved) {mSaveButton.setEnabled(true);}}public void onGestureCancelled(GestureOverlayView overlay,MotionEvent event) {}}private class ButtonOnClickListenerImpl implements OnClickListener {public void onClick(View v) {switch (v.getId()) {case R.id.resetButton:mGestureOverlayView.clear(true);mSaveButton.setEnabled(false);mEditText.setText("");break;case R.id.saveButton:String gestureName = mEditText.getText().toString();try {File gestureLibraryFile = new File(mGestureLibraryPath);// fromFile()加载该路径下的手势库.// 若不存在,则会在路径下创建一个手势库mGestureLibrary = GestureLibraries.fromFile(mGestureLibraryPath);if (!gestureLibraryFile.exists()) {System.out.println("gestureLibraryFile 文件不存在");mGestureLibrary.addGesture(gestureName, mGesture);if (mGestureLibrary.save()) {//只有执行完mGestureLibrary.save()的时候//gestureLibraryFile文件才不为空mSaveButton.setEnabled(false);mEditText.setText("");mGestureOverlayView.clear(true);System.out.println("xxx 成功");} else {System.out.println("xxx 失败");}} else {if (!mGestureLibrary.load()) {System.out.println("xxxx1111 加载手势库失败");} else {Set<String> gesturyies = mGestureLibrary.getGestureEntries();// 删除已经存在的同名的手势if (gesturyies.contains(gestureName)) {ArrayList<Gesture> list = mGestureLibrary.getGestures(gestureName);for (int i = 0; i < list.size(); i++) {mGestureLibrary.removeGesture(gestureName,list.get(i));}}// 添加手势mGestureLibrary.addGesture(gestureName, mGesture);// 判断手势是否保存成功if (mGestureLibrary.save()) {mGestureOverlayView.clear(true);mSaveButton.setEnabled(true);mEditText.setText("");System.out.println("xxxx1111 手势保存成功");} else {System.out.println("xxxx1111 手势保存失败");}}}} catch (Exception e) {}break;default:break;}}}}

main.xml

<RelativeLayout 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" >    <LinearLayout        android:id="@+id/linearLayout"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:layout_alignParentTop="true"        android:orientation="horizontal" >        <TextView            android:id="@+id/textView"            android:layout_width="100dip"            android:layout_height="wrap_content"            android:text="手势的名称:" />        <EditText            android:id="@+id/editText"            android:layout_width="fill_parent"            android:layout_height="wrap_content"            android:hint="在此输入" />    </LinearLayout> <android.gesture.GestureOverlayView     android:id="@+id/gestureOverlayView"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:layout_below="@id/linearLayout"     android:layout_marginBottom="50dip"     android:gestureStrokeType="multiple"  />  <LinearLayout        android:layout_width="fill_parent"        android:layout_height="50dip"        android:layout_alignParentBottom="true"        android:orientation="horizontal" >    <Button         android:id="@+id/saveButton"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_weight="1"         android:text="保存"        />     <Button         android:id="@+id/resetButton"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_weight="1"         android:text="重置"        />   </LinearLayout> </RelativeLayout>

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