我有一个活动，在FolderActivity中使用 onOptionsItemSelected（MenuItem item）方法，我想在另一个活动（MainActivity）上调用此方法 主要活动使用CMU Sphinx - 语音识别工具包。 我需要调用FolderActivity到MainActivity的一些方法。
package com.evolution.filemanager.folders;
import static android.widget.Toast.makeText;
import java.io.File;
import java.util.ArrayList;
import android.annotation.TargetApi;
import android.app.ActionBar;
import android.app.Activity;
import android.app.Fragment;
import android.content.Intent;
import android.content.res.Configuration;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.util.Log;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.Toast;
import com.evolution.filemanager.FileManagerApplication;
import com.evolution.filemanager.about.AboutActivity;
import com.evolution.filemanager.clipboard.Clipboard;
import com.evolution.filemanager.clipboard.Clipboard.ClipboardListener;
import com.evolution.filemanager.clipboard.ClipboardFileAdapter;
import com.evolution.filemanager.favourites.FavouritesManager;
import com.evolution.filemanager.favourites.FavouritesManager.FavouritesListener;
import com.evolution.filemanager.nav_drawer.NavDrawerAdapter;
import com.evolution.utils.FontApplicator;
import com.evolution.utils.ListViewUtils;
import edu.cmu.pocketsphinx.demo.R;
public class FolderActivity extends Activity implements OnItemClickListener, ClipboardListener, FavouritesListener
{
public static class FolderNotOpenException extends Exception
{
}
private static final String LOG_TAG = "Main Activity";
public static final String EXTRA_DIR = FolderFragment.EXTRA_DIR;
DrawerLayout drawerLayout;
ActionBarDrawerToggle actionBarDrawerToggle;
File lastFolder=null;
private FontApplicator fontApplicator;
public static Activity FOLDERACTIVITY;
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_folder);
setupDrawers();
Clipboard.getInstance().addListener(this);
FOLDERACTIVITY = this;
fontApplicator = new FontApplicator(getApplicationContext(), "Roboto_Light.ttf").applyFont(getWindow().getDecorView());
}
public FontApplicator getFontApplicator()
{
return fontApplicator;
}
@Override
protected void onDestroy()
{
Clipboard.getInstance().removeListener(this);
FileManagerApplication application = (FileManagerApplication) getApplication();
application.getFavouritesManager().removeFavouritesListener(this);
super.onDestroy();
}
public void setLastFolder(File lastFolder)
{
this.lastFolder = lastFolder;
}
@Override
protected void onPause()
{
if (lastFolder != null)
{
FileManagerApplication application = (FileManagerApplication) getApplication();
application.getAppPreferences().setStartFolder(lastFolder).saveChanges(getApplicationContext());
Log.d(LOG_TAG, "Saved last folder "+lastFolder.toString());
}
super.onPause();
}
public void setActionbarVisible(boolean visible)
{
ActionBar actionBar = getActionBar();
if (actionBar == null) return;
if (visible)
{
actionBar.show();
setSystemBarTranslucency(false);
}
else
{
actionBar.hide();
setSystemBarTranslucency(true);
}
}
@TargetApi(Build.VERSION_CODES.KITKAT)
protected void setSystemBarTranslucency(boolean translucent)
{
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) return;
if (translucent)
{
getWindow().setFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS, WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
}
else
{
WindowManager.LayoutParams params = getWindow().getAttributes();
params.flags &= (~WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
getWindow().setAttributes(params);
getWindow().clearFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
}
}
public void setupDrawers()
{
this.drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
actionBarDrawerToggle = new ActionBarDrawerToggle(this, drawerLayout, R.drawable.ic_drawer, R.string.open_drawer, R.string.close_drawer)
{
boolean actionBarShown = false;
@Override
public void onDrawerOpened(View drawerView)
{
makeText(getApplicationContext(), "drawer open", Toast.LENGTH_SHORT).show();
super.onDrawerOpened(drawerView);
setActionbarVisible(true);
invalidateOptionsMenu();
}
@Override
public void onDrawerClosed(View drawerView)
{
makeText(getApplicationContext(), "drawer close", Toast.LENGTH_SHORT).show();
actionBarShown=false;
super.onDrawerClosed(drawerView);
invalidateOptionsMenu();
}
@Override
public void onDrawerSlide(View drawerView, float slideOffset)
{
super.onDrawerSlide(drawerView, slideOffset);
if (slideOffset > 0 && actionBarShown == false)
{
actionBarShown = true;
setActionbarVisible(true);
}
else if (slideOffset <= 0) actionBarShown = false;
}
};
drawerLayout.setDrawerListener(actionBarDrawerToggle);
drawerLayout.setDrawerShadow(R.drawable.drawer_shadow, Gravity.START);
drawerLayout.setFocusableInTouchMode(false);
// drawerLayout.setDrawerShadow(R.drawable.drawer_shadow, Gravity.END);
getActionBar().setDisplayHomeAsUpEnabled(true);
getActionBar().setHomeButtonEnabled(true);
setupNavDrawer();
setupClipboardDrawer();
}
@Override
public void onBackPressed()
{
if (drawerLayout.isDrawerOpen(GravityCompat.START))
drawerLayout.closeDrawer(GravityCompat.START);
else if (drawerLayout.isDrawerOpen(GravityCompat.END))
drawerLayout.closeDrawer(GravityCompat.END);
else
super.onBackPressed();
}
void setupNavDrawer()
{
FileManagerApplication application = (FileManagerApplication) getApplication();
// add listview header to push items below the actionbar
ListView navListView = (ListView) findViewById(R.id.listNavigation);
ListViewUtils.addListViewPadding(navListView, this, true);
loadFavourites(application.getFavouritesManager());
application.getFavouritesManager().addFavouritesListener(this);
}
void setupClipboardDrawer()
{
// add listview header to push items below the actionbar
ListView clipboardListView = (ListView) findViewById(R.id.listClipboard);
ListViewUtils.addListViewHeader(clipboardListView, this);
onClipboardContentsChange(Clipboard.getInstance());
}
void loadFavourites(FavouritesManager favouritesManager)
{
ListView listNavigation = (ListView) findViewById(R.id.listNavigation);
NavDrawerAdapter navDrawerAdapter = new NavDrawerAdapter(this, new ArrayList<NavDrawerAdapter.NavDrawerItem>(favouritesManager.getFolders()));
navDrawerAdapter.setFontApplicator(fontApplicator);
listNavigation.setAdapter(navDrawerAdapter);
listNavigation.setOnItemClickListener(this);
}
@Override
protected void onPostCreate(Bundle savedInstanceState)
{
super.onPostCreate(savedInstanceState);
actionBarDrawerToggle.syncState();
if (getFragmentManager().findFragmentById(R.id.fragment) == null)
{
FolderFragment folderFragment = new FolderFragment();
if (getIntent().hasExtra(EXTRA_DIR))
{
Bundle args = new Bundle();
args.putString(FolderFragment.EXTRA_DIR, getIntent().getStringExtra(EXTRA_DIR));
folderFragment.setArguments(args);
}
getFragmentManager()
.beginTransaction()
.replace(R.id.fragment, folderFragment)
.commit();
}
}
@Override
public void onConfigurationChanged(Configuration newConfig)
{
makeText(getApplicationContext(), "unsa ni?", Toast.LENGTH_SHORT).show();
super.onConfigurationChanged(newConfig);
actionBarDrawerToggle.onConfigurationChanged(newConfig);
}
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
makeText(getApplicationContext(), item.toString(), Toast.LENGTH_SHORT).show();
if (actionBarDrawerToggle.onOptionsItemSelected(item))
return true;
switch (item.getItemId())
{
case R.id.menu_about:
startActivity(new Intent(getApplicationContext(), AboutActivity.class));
return true;
}
return super.onOptionsItemSelected(item);
}
public void showFragment(Fragment fragment)
{
getFragmentManager()
.beginTransaction()
.addToBackStack(null)
.replace(R.id.fragment, fragment)
.commit();
}
public void goBack()
{
getFragmentManager().popBackStack();
}
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public FolderFragment getFolderFragment()
{
Fragment fragment = getFragmentManager().findFragmentById(R.id.fragment);
if (fragment instanceof FolderFragment)
return (FolderFragment) fragment;
else return null;
}
public File getCurrentFolder() throws FolderNotOpenException
{
FolderFragment folderFragment = getFolderFragment();
if (folderFragment == null)
throw new FolderNotOpenException();
else return folderFragment.currentDir;
}
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3)
{
switch (arg0.getId())
{
case R.id.listNavigation:
NavDrawerAdapter.NavDrawerItem item = (NavDrawerAdapter.NavDrawerItem) arg0.getItemAtPosition(arg2);
if (item.onClicked(this))
drawerLayout.closeDrawers();
break;
case R.id.listClipboard:
FolderFragment folderFragment = getFolderFragment();
if (folderFragment != null)
{
// TODO: paste single file
}
break;
default:
break;
}
}
public File getLastFolder()
{
return lastFolder;
}
@Override
public void onClipboardContentsChange(Clipboard clipboard)
{
invalidateOptionsMenu();
ListView clipboardListView = (ListView) findViewById(R.id.listClipboard);
if (clipboard.isEmpty() && drawerLayout != null)
drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED, Gravity.END);
else
{
drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED, Gravity.END);
FileManagerApplication application = (FileManagerApplication) getApplication();
if (clipboardListView != null)
{
ClipboardFileAdapter clipboardFileAdapter = new ClipboardFileAdapter(this, clipboard, application.getFileIconResolver());
clipboardFileAdapter.setFontApplicator(fontApplicator);
clipboardListView.setAdapter(clipboardFileAdapter);
}
}
}
@Override
public void onFavouritesChanged(FavouritesManager favouritesManager)
{
loadFavourites(favouritesManager);
}
@Override
public boolean onKeyLongPress(int keyCode, KeyEvent event)
{
Log.d("Key Long Press", event.toString());
if (keyCode == KeyEvent.KEYCODE_BACK)
{
finish();
return true;
}
else return super.onKeyLongPress(keyCode, event);
}
}
以及我想要致电的活动
package edu.cmu.pocketsphinx.demo;
import static android.widget.Toast.makeText;
import static edu.cmu.pocketsphinx.SpeechRecognizerSetup.defaultSetup;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.drawable.AnimationDrawable;
import android.os.AsyncTask;
import android.os.Bundle;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import com.evolution.filemanager.about.AboutActivity;
import com.evolution.filemanager.folders.FolderActivity;
import com.evolution.utils.DataClearer;
import edu.cmu.pocketsphinx.Assets;
import edu.cmu.pocketsphinx.Hypothesis;
import edu.cmu.pocketsphinx.RecognitionListener;
import edu.cmu.pocketsphinx.SpeechRecognizer;
public class MainActivity extends Activity implements
RecognitionListener {
public AnimationDrawable rocketAnimation;
private static final String KWS_SEARCH = "wakeup";
private static final String FORECAST_SEARCH = "forecast";
private static final String DIGITS_SEARCH = "digits";
private static final String MENU_SEARCH = "menu";
private static final String KEYPHRASE = "frost";
private static final String GO_BACK = "back";
private static final String PREVIOUS = "previous";
private static final String OPEN_FILE_MANAGER = "open file manager";
private static final String OPEN_ABOUT = "open about";
private static final String OPEN_MUSIC = "open music";
private static final String OPEN_PICTURES = "open pictures";
private static final String OPEN_VIDEOS = "open videos";
private static final String SHOW_COMMANDS = "show commands";
private static final String CLOSE_FILE_MANAGER = "close file manager";
private static final String CLOSE_ABOUT = "close about";
private static final String CLOSE_MUSIC = "close music";
private static final String CLOSE_PICTURES = "close pictures";
private static final String CLOSE_VIDEOS = "close videos";
private static final String CLOSE_COMMANDS = "close commands";
private static final String SHOW_DRAWER = "show drawer";
private static final String HIDE_DRAWER = "hide drawer";
public static boolean isOPEN_FILE_MANAGER = false;
private static boolean isOPEN_ABOUT = false;
private static boolean isOPEN_MUSIC = false;
private static boolean isOPEN_PICTURES = false;
private static boolean isOPEN_VIDEOS = false;
private static boolean isSHOW_COMMANDS = false;
private static boolean isSHOW_DRAWER = false;
private static String MENU_CAPTION;
private SpeechRecognizer recognizer;
private HashMap<String, Integer> captions;
@Override
public void onCreate(Bundle state) {
super.onCreate(state);
// Prepare the data for UI
captions = new HashMap<String, Integer>();
captions.put(KWS_SEARCH, R.string.kws_caption);
captions.put(MENU_SEARCH, R.string.menu_caption);
captions.put(DIGITS_SEARCH, R.string.digits_caption);
captions.put(FORECAST_SEARCH, R.string.forecast_caption);
setContentView(R.layout.main);
((TextView) findViewById(R.id.caption_text))
.setText("Preparing the recognizer");
ImageView rocketImage = (ImageView) findViewById(R.id.imageViewAnim);
rocketImage.setBackgroundResource(R.drawable.heart_animation);
rocketAnimation = (AnimationDrawable) rocketImage.getBackground();
// Recognizer initialization is a time-consuming and it involves IO,
// so we execute it in async task
new AsyncTask<Void, Void, Exception>() {
@Override
protected Exception doInBackground(Void... params) {
try {
Assets assets = new Assets(PocketSphinxActivity.this);
File assetDir = assets.syncAssets();
setupRecognizer(assetDir);
} catch (IOException e) {
return e;
}
return null;
}
@Override
protected void onPostExecute(Exception result) {
if (result != null) {
((TextView) findViewById(R.id.caption_text))
.setText("Failed to init recognizer " + result);
} else {
switchSearch(KWS_SEARCH);
}
}
}.execute();
}
@Override
public void onPartialResult(Hypothesis hypothesis) {
String text = hypothesis.getHypstr();
TextView tv = ((TextView) findViewById(R.id.caption_text));
if (text.equals(KEYPHRASE))
{
switchSearch(MENU_SEARCH);
rocketAnimation.start();
}
else if (text.equals(OPEN_FILE_MANAGER))
{
switchSearch(KWS_SEARCH);
Intent intent = new Intent (PocketSphinxActivity.this , FolderActivity.class);
startActivity(intent);
isOPEN_FILE_MANAGER = true;
}
else if (text.equals(CLOSE_FILE_MANAGER))
{
if(isOPEN_FILE_MANAGER == true)
{
switchSearch(KWS_SEARCH);
FolderActivity.FOLDERACTIVITY.finish();
isOPEN_FILE_MANAGER = false;
}
}
else if (text.equals(SHOW_COMMANDS))
{
switchSearch(KWS_SEARCH);
Intent intent = new Intent (PocketSphinxActivity.this , Commands.class);
startActivity(intent);
isSHOW_COMMANDS = true;
}
else if (text.equals(CLOSE_COMMANDS))
{
if(isSHOW_COMMANDS == true)
{
switchSearch(KWS_SEARCH);
Commands.SHOWCOMMANDS.finish();
}
}
else if (text.equals(OPEN_PICTURES))
{
switchSearch(KWS_SEARCH);
Intent intent = new Intent (PocketSphinxActivity.this , AboutActivity.class);
startActivity(intent);
}
else if(text.equals(OPEN_ABOUT))
{
switchSearch(KWS_SEARCH);
Intent intent = new Intent(PocketSphinxActivity.this, AboutActivity.class);
startActivity(intent);
isOPEN_ABOUT = true;
}
else if(text.equals(CLOSE_ABOUT))
{
if (isOPEN_ABOUT == true)
{
switchSearch(KWS_SEARCH);
AboutActivity.ABOUTACTIVITY.finish();
}
}
else if(text.equals(GO_BACK) || text.equals(PREVIOUS))
{
if(isOPEN_FILE_MANAGER == true )
{
FolderActivity.FOLDERACTIVITY//where i want to call onOptionsItemSelected
switchSearch(KWS_SEARCH);
}
}
else
{
switchSearch(KWS_SEARCH);
((TextView) findViewById(R.id.result_text)).setText(text);
}
}
@Override
public void onResult(Hypothesis hypothesis) {
((TextView) findViewById(R.id.result_text)).setText("");
if (hypothesis != null) {
String text = hypothesis.getHypstr();
makeText(getApplicationContext(), text, Toast.LENGTH_SHORT).show();
}
}
@Override
public void onBeginningOfSpeech() {
}
@Override
public void onEndOfSpeech() {
if (DIGITS_SEARCH.equals(recognizer.getSearchName())
|| FORECAST_SEARCH.equals(recognizer.getSearchName())
|| OPEN_FILE_MANAGER.equals(recognizer.getSearchName()))
switchSearch(KWS_SEARCH);
}
private void switchSearch(String searchName) {
recognizer.stop();
recognizer.startListening(searchName);
String caption = getResources().getString(captions.get(searchName));
((TextView) findViewById(R.id.caption_text)).setText(caption);
}
private void setupRecognizer(File assetsDir) {
File modelsDir = new File(assetsDir, "models");
recognizer = defaultSetup()
.setAcousticModel(new File(modelsDir, "hmm/en-us-semi"))
.setDictionary(new File(modelsDir, "dict/cmu07a.dic"))
.setRawLogDir(assetsDir).setKeywordThreshold(1e-20f)
.getRecognizer();
recognizer.addListener(this);
// Create keyword-activation search.
recognizer.addKeyphraseSearch(KWS_SEARCH, KEYPHRASE);
// Create grammar-based searches.
File menuGrammar = new File(modelsDir, "grammar/menu.gram");
recognizer.addGrammarSearch(MENU_SEARCH, menuGrammar);
File digitsGrammar = new File(modelsDir, "grammar/digits.gram");
recognizer.addGrammarSearch(DIGITS_SEARCH, digitsGrammar);
// Create language model search.
File languageModel = new File(modelsDir, "lm/weather.dmp");
recognizer.addNgramSearch(FORECAST_SEARCH, languageModel);
}
@Override
protected void onStop(){
super.onStop();
}
//Fires after the OnStop() state
@Override
protected void onDestroy() {
super.onDestroy();
try {
trimCache(this); //clear cache to minimize the app size
DataClearer.getInstance().clearApplicationData();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void trimCache(Context context) {
try {
File dir = context.getCacheDir();
if (dir != null && dir.isDirectory()) {
deleteDir(dir);
}
} catch (Exception e) {
// TODO: handle exception
}
}
public static boolean deleteDir(File dir) {
if (dir != null && dir.isDirectory()) {
String[] children = dir.list();
for (int i = 0; i < children.length; i++) {
boolean success = deleteDir(new File(dir, children[i]));
if (!success) {
return false;
}
}
}
// The directory is now empty so delete it
return dir.delete();
}
}
FolderActivity在MainActivty之上运行，但MainActivity中的语音识别仍处于活动状态，我希望语音本身在FolderActivity中进行一些操作
答案 0 :(得分：0)
以下是一些建议：
让FolderActivity注册BroadcastReceiver作为某个Intent的听众。当MainActivity想要在FolderActivity中执行某项操作时，它可以发送广播Intent，BroadcastReceiver中的FolderActivity可以看到广播MainActivity “活动。
当FolderActivity想要在FolderActivity中执行某项操作时，它可以使用带有标记Intent的{{1}}和一些“额外”再次启动Intent.FLAG_ACTIVITY_SINGLE_TOP “这描述了FolderActivity应该做什么。在FolderActivity覆盖onNewIntent()中，读取传递的Intent参数并使用它来确定在FolderActivity. Because the Activity was launched with Intent.FLAG_ACTIVITY_SINGLE_TOP , Android won't create a new instance of the Activity, it will just call onNewIntent（）`上调用哪种方法现有的实例。
让FolderActivity将public static类型的Activity变量设置为onCreate()中对自身的引用。然后，MainActivity可以通过执行FolderActivity
FolderActivity.activityReference.doSomething()上的方法
方法3不是首选方法，因为您需要确保在public static中将null变量设置为FolderActivity.onDestroy()并且还有其他问题（时序问题，内存泄漏）等等，需要妥善处理。
注意：您可能不想直接致电onOptionsItemSelected()。当用户选择选项时，Android框架会调用此方法。你应该直接调用实际做某事的方法，而不是这个框架回调方法。