手势识别 添加指定手势

/* * Copyright (C) 2009 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.android.gesture.builder; import android.app.Dialog; import android.app.AlertDialog; import android.app.ListActivity; import android.os.Bundle; import android.os.AsyncTask; import android.os.Environment; import android.view.View; import android.view.ContextMenu; import android.view.MenuItem; import android.view.LayoutInflater; import android.view.ViewGroup; import android.gesture.GestureLibrary; import android.gesture.Gesture; import android.gesture.GestureLibraries; import android.widget.TextView; import android.widget.EditText; import android.widget.AdapterView; import android.widget.Toast; import android.widget.ArrayAdapter; import android.content.DialogInterface; import android.content.Context; import android.content.Intent; import android.content.res.Resources; import android.text.TextUtils; import android.graphics.Bitmap; import android.graphics.drawable.Drawable; import android.graphics.drawable.BitmapDrawable; import java.util.Map; import java.util.Collections; import java.util.HashMap; import java.util.Comparator; import java.util.Set; import java.io.File; public class GestureBuilderActivity extends ListActivity { private static final int STATUS_SUCCESS = 0; private static final int STATUS_CANCELLED = 1; private static final int STATUS_NO_STORAGE = 2; private static final int STATUS_NOT_LOADED = 3; private static final int MENU_ID_RENAME = 1; private static final int MENU_ID_REMOVE = 2; private static final int DIALOG_RENAME_GESTURE = 1; private static final int REQUEST_NEW_GESTURE = 1; // Type: long (id) private static final String GESTURES_INFO_ID = "gestures.info_id"; private final File mStoreFile = new File(Environment.getExternalStorageDirectory(), "gestures"); private final Comparator<NamedGesture> mSorter = new Comparator<NamedGesture>() { public int compare(NamedGesture object1, NamedGesture object2) { return object1.name.compareTo(object2.name); } }; private static GestureLibrary sStore; private GesturesAdapter mAdapter; private GesturesLoadTask mTask; private TextView mEmpty; private Dialog mRenameDialog; private EditText mInput; private NamedGesture mCurrentRenameGesture; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.gestures_list); mAdapter = new GesturesAdapter(this); setListAdapter(mAdapter); if (sStore == null) { sStore = GestureLibraries.fromFile(mStoreFile); } mEmpty = (TextView) findViewById(android.R.id.empty); loadGestures(); registerForContextMenu(getListView()); } static GestureLibrary getStore() { return sStore; } @SuppressWarnings({"UnusedDeclaration"}) public void reloadGestures(View v) { loadGestures(); } @SuppressWarnings({"UnusedDeclaration"}) public void addGesture(View v) { Intent intent = new Intent(this, CreateGestureActivity.class); startActivityForResult(intent, REQUEST_NEW_GESTURE); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (resultCode == RESULT_OK) { switch (requestCode) { case REQUEST_NEW_GESTURE: loadGestures(); break; } } } private void loadGestures() { if (mTask != null && mTask.getStatus() != GesturesLoadTask.Status.FINISHED) { mTask.cancel(true); } mTask = (GesturesLoadTask) new GesturesLoadTask().execute(); } @Override protected void onDestroy() { super.onDestroy(); if (mTask != null && mTask.getStatus() != GesturesLoadTask.Status.FINISHED) { mTask.cancel(true); mTask = null; } cleanupRenameDialog(); } private void checkForEmpty() { if (mAdapter.getCount() == 0) { mEmpty.setText(R.string.gestures_empty); } } @Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); if (mCurrentRenameGesture != null) { outState.putLong(GESTURES_INFO_ID, mCurrentRenameGesture.gesture.getID()); } } @Override protected void onRestoreInstanceState(Bundle state) { super.onRestoreInstanceState(state); long id = state.getLong(GESTURES_INFO_ID, -1); if (id != -1) { final Set<String> entries = sStore.getGestureEntries(); out: for (String name : entries) { for (Gesture gesture : sStore.getGestures(name)) { if (gesture.getID() == id) { mCurrentRenameGesture = new NamedGesture(); mCurrentRenameGesture.name = name; mCurrentRenameGesture.gesture = gesture; break out; } } } } } @Override public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) { super.onCreateContextMenu(menu, v, menuInfo); AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) menuInfo; menu.setHeaderTitle(((TextView) info.targetView).getText()); menu.add(0, MENU_ID_RENAME, 0, R.string.gestures_rename); menu.add(0, MENU_ID_REMOVE, 0, R.string.gestures_delete); } @Override public boolean onContextItemSelected(MenuItem item) { final AdapterView.AdapterContextMenuInfo menuInfo = (AdapterView.AdapterContextMenuInfo) item.getMenuInfo(); final NamedGesture gesture = (NamedGesture) menuInfo.targetView.getTag(); switch (item.getItemId()) { case MENU_ID_RENAME: renameGesture(gesture); return true; case MENU_ID_REMOVE: deleteGesture(gesture); return true; } return super.onContextItemSelected(item); } private void renameGesture(NamedGesture gesture) { mCurrentRenameGesture = gesture; showDialog(DIALOG_RENAME_GESTURE); } @Override protected Dialog onCreateDialog(int id) { if (id == DIALOG_RENAME_GESTURE) { return createRenameDialog(); } return super.onCreateDialog(id); } @Override protected void onPrepareDialog(int id, Dialog dialog) { super.onPrepareDialog(id, dialog); if (id == DIALOG_RENAME_GESTURE) { mInput.setText(mCurrentRenameGesture.name); } } private Dialog createRenameDialog() { final View layout = View.inflate(this, R.layout.dialog_rename, null); mInput = (EditText) layout.findViewById(R.id.name); ((TextView) layout.findViewById(R.id.label)).setText(R.string.gestures_rename_label); AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setIcon(0); builder.setTitle(getString(R.string.gestures_rename_title)); builder.setCancelable(true); builder.setOnCancelListener(new Dialo