Android 手势

//定义布局

<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"
    tools:context=".MainActivity" >

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

</RelativeLayout>

public class MainActivity extends Activity {

	private GestureOverlayView gestureOverlayView = null;

	private void initView() {
		gestureOverlayView = (GestureOverlayView) findViewById(R.id.gestureOverlayView_main);
	}

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		initView();
		// 添加
		// gestureOverlayView
		// .addOnGesturePerformedListener(new OnGesturePerformedListener() {
		//
		// // 手势绘制完毕回调
		// @Override
		// public void onGesturePerformed(GestureOverlayView overlay,
		// Gesture gesture) {
		// // TODO Auto-generated method stub
		// // 手势库
		// // 获取手势库对象的方法
		// GestureLibrary gestureLibrary = GestureLibraries.fromFile(Environment
		// .getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)
		// + File.separator + "shoushi");
		// // 要给每一个手势命名，也就是在一个手势库当中，可以还有多个手势
		// gestureLibrary.addGesture("wuxing", gesture);
		//
		// // 把已经在手势库对象中的手势保存到文件当中,返回值代表成功失败
		// boolean flag = gestureLibrary.save();
		// if (flag) {
		// Toast.makeText(getApplicationContext(), "添加成功",
		// Toast.LENGTH_SHORT).show();
		// }else{
		// Toast.makeText(getApplicationContext(), "添加失败",
		// Toast.LENGTH_SHORT).show();
		// }
		// }
		// });

		// 匹配
		gestureOverlayView
				.addOnGesturePerformedListener(new OnGesturePerformedListener() {

					@Override
					public void onGesturePerformed(GestureOverlayView overlay,
							Gesture gesture) {
						// TODO Auto-generated method stub
						GestureLibrary gestureLibrary = GestureLibraries.fromFile(Environment
								.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS)
								+ File.separator + "shoushi");
						// 如果加载成功了，就开始匹配逻辑。
						if (gestureLibrary.load()) {
							// 用一个已知的手势去寻找可以匹配的手势，返回成一个手势的集合
							ArrayList<Prediction> list = gestureLibrary
									.recognize(gesture);

							if (list != null && list.size() > 0) {
								for (int i = 0; i < list.size(); i++) {
									Toast.makeText(
											getApplicationContext(),
											list.get(i).name + ":"
													+ list.get(i).score,
											Toast.LENGTH_SHORT).show();
								}
							} else {
								Toast.makeText(getApplicationContext(),
										"没有匹配到", Toast.LENGTH_SHORT).show();
							}

						} else {
							Toast.makeText(getApplicationContext(), "加载失败",
									Toast.LENGTH_SHORT).show();
						}

					}
				});

	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}