3.8 Gestures(手势)

te(R.layout.dialog_save,null,false); ImageView img_show = (ImageView) saveDialog.findViewById(R.id.img_show); final EditText edit_name = (EditText) saveDialog.findViewById(R.id.edit_name); Bitmap bitmap = gesture.toBitmap(128,128,10,0xffff0000); img_show.setImageBitmap(bitmap); new AlertDialog.Builder(MainActivity.this).setView(saveDialog) .setPositiveButton("保存",new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i) { //获取文件对应的手势库 GestureLibrary gestureLib = GestureLibraries.fromFile("/mnt/sdcard/mygestures"); gestureLib.addGesture(edit_name.getText().toString(),gesture); gestureLib.save(); } }).setNegativeButton("取消", null).show(); } }); }}最后还需要在AndroidManifest.xml中添加写入SD卡的权限：<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>6.手势识别示例实现代码：public class MainActivity extends AppCompatActivity { private GestureOverlayView gesture; private GestureLibrary gestureLibrary; private Context mContext; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mContext = MainActivity.this; gestureLibrary = GestureLibraries.fromFile("mmt/sdcard/mygestures"); if (gestureLibrary.load()) { Toast.makeText(mContext, "手势库加载成功", Toast.LENGTH_SHORT).show(); } else { Toast.makeText(mContext, "手势库加载失败", Toast.LENGTH_SHORT).show(); } //获取手势编辑组件后，设置相关参数 gesture = (GestureOverlayView) findViewById(R.id.gesture); gesture.setGestureColor(Color.GREEN); gesture.setGestureStrokeWidth(5); gesture.addOnGesturePerformedListener(new GestureOverlayView.OnGesturePerformedListener() { @Override public void onGesturePerformed(GestureOverlayView gestureOverlayView, final Gesture gesture) { //识别用户刚绘制的手势 ArrayList<Prediction> predictions = gestureLibrary.recognize(gesture); ArrayList<String> result = new ArrayList<String>(); //遍历所有找到的Prediction对象 for (Prediction pred : predictions) { if (pred.score > 2.0) { result.add("与手势【" + pred.name + "】相似度为" + pred.score); } } if (result.size() > 0) { ArrayAdapter<Object> adapter = new ArrayAdapter<Object>(mContext, android.R.layout.simple_dropdown_item_1line, result.toArray()); new AlertDialog.Builder(mContext).setAdapter(adapter,null).setPositiveButton("确定",null).show(); }else{ Toast.makeText(mContext,"无法找到匹配的手势！",Toast.LENGTH_SHORT).show(); } } }); }}另外别忘了在AndroidManifest.xml文件中加入读SD卡的权限：<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>本节小结：好的，本节介绍了Android中的Gesture手势，讲解了手势判断，手势添加，手势识别三个内容，大部分例子来自于李刚老师的Android疯狂讲义，有兴趣的可以看看该书~谢谢