Android编程实现自定义手势的方法详解

voidaddGesture(String entryName, Gesture gesture);//添加一个名为entryName的手势
SetgetGestureEntries();//获取该手势库中的所有手势的名称
ArrayListgetGestures(String entryName);//获取entryName名称对应的全部手势
ArrayListrecognize(Gesture gesture);//从当前手势库中识别与gesture匹配的全部手势
voidremoveEntry(String entryName);//删除手势库中entryName对应的手势
voidremoveGesture(String entryName, Gesture gesture);//删除手势库中entryName、gesture对应的手势
booleansave();//手势库文件有改动后调用该方法保存手势库

<&＃63;xml version="1.0" encoding="utf-8"&＃63;>

<&＃63;xmlversiOnxmlversion="1.0" encoding="utf-8"&＃63;>

public class AddGesture extends Activity
{
  EditText editText;
  GestureOverlayView gestureView;
  @Override
  public void onCreate(Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    editText = (EditText) findViewById(R.id.gesture_name);
    gestureView = (GestureOverlayView) findViewById(R.id.gesture);
    // 设置手势的绘制颜色
    gestureView.setGestureColor(Color.RED);
    // 设置手势的绘制宽度
    gestureView.setGestureStrokeWidth(4);
    // 为gesture的手势完成事件绑定事件监听器
    gestureView.addOnGesturePerformedListener(
      new OnGesturePerformedListener()
      {
        @Override
        public void onGesturePerformed(GestureOverlayView overlay
          ,final Gesture gesture)
        {
          //加载save.xml界面布局代表的视图
          View saveDialog = getLayoutInflater().inflate(
            R.layout.save, null);
          // 获取saveDialog里的show组件
          ImageView imageView = (ImageView) saveDialog
            .findViewById(R.id.show);
          // 获取saveDialog里的gesture_name组件
          final EditText gestureName = (EditText) saveDialog
            .findViewById(R.id.gesture_name);
          // 根据Gesture包含的手势创建一个位图
          Bitmap bitmap = gesture.toBitmap(128, 128, 10, 0xFFFF0000);
          imageView.setImageBitmap(bitmap);
          //使用对话框显示saveDialog组件
          new AlertDialog.Builder(AddGesture.this)
            .setView(saveDialog)
            .setPositiveButton("保存", new OnClickListener()
            {
              @Override
              public void onClick(DialogInterface dialog,
                int which)
              {
                // 获取指定文件对应的手势库
                GestureLibrary gestureLib = GestureLibraries
                  .fromFile("/mnt/sdcard/mygestures");
                // 添加手势
                gestureLib.addGesture(
gestureName.getText().toString()
                  ,gesture);
                // 保存手势库
                gestureLib.save();
              }
            })
            .setNegativeButton("取消", null)
            .show();
          }
      });
  }
}