所以这里是应用程序的链接：- Nearpeer-Offline messenger
所以在集成firebase之后，有时当我重新启动这个应用程序时，我在第一个活动（mainactivity）中卡住了，它挂起，10-20秒后，错误出现“应用程序没有响应”并且应用程序关闭。我在这里之前已经问过问题了：-链接
但没有得到很好的反响。在这里，我提供了一个 MainActivity 代码：-
package com.nearpeer.app;
/**
*
* Wifi-Direct based multi-user chat application
*
*/
import java.util.Locale;
import android.annotation.SuppressLint;
import android.app.ActionBar;
import android.app.AlertDialog;
import android.app.FragmentTransaction;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnCancelListener;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.wifi.WifiManager;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.provider.Settings.Secure;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.Toast;
import com.google.firebase.analytics.FirebaseAnalytics;
/**
* The app's main entry point. Holds 2 fragments: {@link ChatSearchScreenFrag} and {@link ChatHistoryScreenFrag}.
* The 1st fragment offers to scan for new chat groups and users. The 2nd offers to view chat history.
*/
public class MainScreenActivity extends FragmentActivity implements ActionBar.TabListener
{
private AlertDialog mDialog=null;
private OnClickListener AlertCheckBoxClickListener=null; //used to handle check-box click events for a dialog
SectionsPagerAdapter mSectionsPagerAdapter; //adapter for the tab view. Contains all the frags
ViewPager mViewPager; //a layout widget in which each child view is a separate page (a separate tab) in the layout.
//both fragment will initialize these references when they're created:
public ChatHistoryScreenFrag mHistoryFrag = null;
public ChatSearchScreenFrag mSearchFrag = null;
boolean isServiceStarted = false;
boolean wasWifiDialogShown = false;
static int mDisplayedFragIndex = 0;
public static long ChatRoomAccumulatingSerialNumber=0;
public static String UniqueID=null;
public static String UserName = ":>~"; //setting a default user name
static boolean isToNotifyOnNewMsg = false; //defines if notifications should be shown on arrival of new messages
static int RefreshPeriodInMs = 30000; //defines the peer refresh period
private boolean mIsRunForTheFirstTime=false;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_screen);
//FirebaseAnalytics mFirebaseAnalytics = FirebaseAnalytics.getInstance(this);
/*Bundle bundle = new Bundle();
bundle.putString(FirebaseAnalytics.Param.ITEM_ID, id);
bundle.putString(FirebaseAnalytics.Param.ITEM_NAME, name);
bundle.putString(FirebaseAnalytics.Param.CONTENT_TYPE, "image");
mFirebaseAnalytics.logEvent(FirebaseAnalytics.Event.SELECT_CONTENT, bundle);*/
try {
InitializeTabHandlerAndAdapter();
if (!isServiceStarted && ChatSearchScreenFrag.mService == null) {
startService(new Intent(this, LocalService.class));
isServiceStarted = true;
}
getPrefs(); //get the shared prefs
//Happens only when the app is run for the very 1st time on a device
if (MainScreenActivity.UniqueID == null) {
UserName = new String(Secure.getString(getContentResolver(), Secure.ANDROID_ID)); //get a unique id
UniqueID = new String(UserName);
}//if
//Remove the title bar for out entire app
getActionBar().setDisplayShowTitleEnabled(false);
getActionBar().setDisplayShowHomeEnabled(false);
}catch (Exception e){
Toast toast = Toast.makeText(getApplicationContext(), "Soory! Try after some time.",
Toast.LENGTH_SHORT);
toast.setGravity(Gravity.BOTTOM|Gravity.CENTER, 0, 10);
toast.show();
}
}//end of onCreate()
@Override
protected void onResume()
{
super.onResume();
//check if this activity was launched by the b-cast receiver after a wifi shutdown
try {
boolean isToDisplayWifiDialog = getIntent()
.getBooleanExtra(Constants.WIFI_BCAST_RCVR_WIFI_OFF_EVENT_INTENT_EXTRA_KEY, false);
if (isToDisplayWifiDialog && !wasWifiDialogShown) {
new EnableWifiDirectDialog().show(getSupportFragmentManager(), "MyDialog"); //show a dialog
wasWifiDialogShown = true;
}
//if this app is run for the very 1st time, we want to launch the settings activity first.
if (mIsRunForTheFirstTime) {
//launch the preferences activity
startActivity(new Intent(this, QuickPrefsActivity.class));
mIsRunForTheFirstTime = false;
}
}catch (Exception e){
Toast toast = Toast.makeText(getApplicationContext(), "Soory! Try after some time.",
Toast.LENGTH_SHORT);
toast.setGravity(Gravity.BOTTOM|Gravity.CENTER, 0, 10);
toast.show();
}
}
@Override
protected void onPause()
{
super.onPause();
savePrefs(); //save the preferences
}//end of onPause()
private void InitializeTabHandlerAndAdapter()
{
// Set up the action bar (enable tab display).
final ActionBar actionBar = getActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Create the adapter that will return a fragment for each of the two
// primary sections of the app.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
// When swiping between different sections, select the corresponding
// tab. We can also use ActionBar.Tab#select() to do this if we have
// a reference to the Tab.
mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener()
{
@Override
//if a tab was changed by a swipe gesture
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position); //update the tab bar to match the selected page
mDisplayedFragIndex=position; //update the index of the currently displayed frag
if (position==1) //if the view has moved to the history fragment:
{
mHistoryFrag.loadHistory(); //reload the history list view
}
invalidateOptionsMenu();
}
});
// For each of the sections in the app, add a tab to the action bar.
for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++)
{
// Create a tab with text corresponding to the page title defined by
// the adapter. Also specify this Activity object, which implements
// the TabListener interface, as the callback (listener) for when
// this tab is selected.
actionBar.addTab(actionBar.newTab()
.setText(mSectionsPagerAdapter.getPageTitle(i))
.setTabListener(this));
}//for
}//end of InitializeTabHandlerAndAdapter()
/**
* Used to modify menu item according to the app's state
*/
@Override
public boolean onPrepareOptionsMenu(Menu menu)
{
super.onPrepareOptionsMenu(menu);
//Check wifi state.
ConnectivityManager connManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo mWifi = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
WifiManager wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);
if(mWifi.isConnected()||wifi.isWifiEnabled()) {
ChatSearchScreenFrag.mIsWifiDirectEnabled = true;
}
//if the wifi-direct is disabled, we want to disable the chat room creation option
menu.getItem(0).setEnabled(ChatSearchScreenFrag.mIsWifiDirectEnabled);
//if this menu is opened when the chat search is active:
if (mDisplayedFragIndex==0)
{
//hide the 'delete history option:
menu.findItem(R.id.action_delete_all_history).setVisible(false);
}
else //history frag is active:
{
//show the 'delete history option:
menu.findItem(R.id.action_delete_all_history).setVisible(true);
menu.findItem( R.id.clear_ignore_list).setVisible(false);
}
return true;
}
@SuppressLint("HandlerLeak")
Handler FirstTimeMenuUpdater = new Handler()
{
@Override
public void handleMessage(Message msg)
{
MainScreenActivity.this.invalidateOptionsMenu();
}
};
/**
* Called only once when the app starts
*/
@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_screen_menu, menu);
FirstTimeMenuUpdater.sendEmptyMessageDelayed(0, 500);
return true;
}//end of onCreateOptionsMenu()
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
switch (item.getItemId())
{
case R.id.action_settings://setting was clicked
{
startActivity(new Intent(this, QuickPrefsActivity.class));
break;
}
case R.id.action_create_new_chat_room: //exit app was clicked
{
mDialog =CreatePublicChatCreationDialog();
mDialog.show();
AlertCheckBoxClickListener= new OnClickListener()
{
@Override
public void onClick(View v)
{
AlertDialog dialog = MainScreenActivity.this.mDialog;
EditText ed = (EditText) dialog.findViewById(R.id.choosePassword);
boolean b= !ed.isEnabled();
ed.setEnabled(b);
}
};
CheckBox ch = (CheckBox) mDialog.findViewById(R.id.checkBoxSetPassword);
ch.setOnClickListener(AlertCheckBoxClickListener);
break;
}
case R.id.clear_ignore_list: //exit app was clicked
{
if (mSearchFrag!=null)
mSearchFrag.ClearIgnoredUsersList();
break;
}
case R.id.feedback: //exit app was clicked
{
startActivity(new Intent(this, FeedbackActivity.class));
break;
}
case R.id.about: //exit app was clicked
{
startActivity(new Intent(this, AboutusActivity.class));
break;
}
case R.id.action_exit: //exit app was clicked
{
kill();
break;
}
case R.id.action_delete_all_history: //delete all history was clicked
{
mHistoryFrag.DeleteAllHistory();
break;
}
}//switch
return true;
}//end of onOptionsItemSelected()
@Override
public void onTabSelected(ActionBar.Tab tab,FragmentTransaction fragmentTransaction)
{
// When the given tab is selected, switch to the corresponding page in
// the ViewPager.
mViewPager.setCurrentItem(tab.getPosition());
}//end of onTabSelected()
@Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction)
{
}
@Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction)
{
}
/**
* A FragmentPagerAdapter that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter
{
public SectionsPagerAdapter(FragmentManager fm)
{
super(fm);
}
@Override
public Fragment getItem(int position)
{
// getItem is called to instantiate the fragment for the given page.
Fragment fragment=null; //will hold the relevant fragment to be returned
switch (position)
{
case 0:
fragment = new ChatSearchScreenFrag(); //create a new chat search fragment
break;
case 1:
fragment = new ChatHistoryScreenFrag(); //create a new history display fragment
break;
}
return fragment;
}//end of getItem()
@Override
public int getCount()
{
return 2; // Show 2 total pages.
}
//Returns the title for each tab
@Override
public CharSequence getPageTitle(int position)
{
Locale l = Locale.getDefault();
switch (position) {
case 0:
return getString(R.string.main_screen_tab1_title).toUpperCase(l);
case 1:
return getString(R.string.main_screen_tab2_title).toUpperCase(l);
}
return null;
}
}//end of class
/**
* Called when the refresh button in the chat search fragment is clicked
*/
public void onRefreshButtonClicked (View v)
{
mSearchFrag.onRefreshButtonClicked(v); //call the frag's method
}//end of onRefreshButtonClicked()
/**
* Reads the saved preferences
*/
protected void getPrefs()
{
SharedPreferences prefs = getPreferences(0);
ChatRoomAccumulatingSerialNumber = prefs.getLong(Constants.SHARED_PREF_CHAT_ROOM_SERIAL_NUM, 0);
UserName = prefs.getString(Constants.SHARED_PREF_USER_NAME, null);
UniqueID = prefs.getString(Constants.SHARED_PREF_UNIQUE_ID, null);
isToNotifyOnNewMsg = prefs.getBoolean(Constants.SHARED_PREF_ENABLE_NOTIFICATION, false);
RefreshPeriodInMs = prefs.getInt(Constants.SHARED_PREF_REFRESH_PERIOD, 10000);
mIsRunForTheFirstTime = prefs.getBoolean(Constants.SHARED_PREF_IS_FIRST_RUN, true);
}//end of getPrefs(){
/**
* Saved the shared preferences
*/
protected void savePrefs()
{
SharedPreferences.Editor editor = getPreferences(0).edit();
editor.putLong(Constants.SHARED_PREF_CHAT_ROOM_SERIAL_NUM, ChatRoomAccumulatingSerialNumber); //save to current SN
editor.putString(Constants.SHARED_PREF_USER_NAME, UserName);
editor.putString(Constants.SHARED_PREF_UNIQUE_ID, UniqueID);
editor.putBoolean(Constants.SHARED_PREF_ENABLE_NOTIFICATION, isToNotifyOnNewMsg);
editor.putInt(Constants.SHARED_PREF_REFRESH_PERIOD, RefreshPeriodInMs);
editor.putBoolean(Constants.SHARED_PREF_IS_FIRST_RUN, false);
editor.commit();
}//end of savePrefs()
/**
* Calls the kill() method of {@link ChatSearchScreenFrag}, resets all static variables,
* calls the system's garbage collector and finishes.
*/
public void kill(){
savePrefs();
mSearchFrag.kill(); //close the entire app (service and welcome socket)
//we'de like to reset all static variables in our app:
ChatActivity.mIsActive=false;
ChatActivity.mMsgsWaitingForSendResult=null;
ChatSearchScreenFrag.mService=null;
ChatSearchScreenFrag.mIsWifiDirectEnabled=false;
ChatSearchScreenFrag.mIsConnectedToGroup=false;
ChatSearchScreenFrag.mManager = null;
ChatSearchScreenFrag.mChannel = null;
LocalService.mNotificationManager=null;
//Indicates to the VM that it would be a good time to run the garbage collector
System.gc();
finish(); //close this activity
}//kill()
private AlertDialog CreatePublicChatCreationDialog()
{
// This example shows how to add a custom layout to an AlertDialog
LayoutInflater factory = LayoutInflater.from(this);
final View textEntryView = factory.inflate(R.layout.public_chat_creation_dialog, null);
return new AlertDialog.Builder(this)
.setTitle("Create A New Room")
.setView(textEntryView)
.setIcon(R.drawable.settings_icon)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
boolean isPassword=false;
String password="";
String roomName=null;
EditText ed = (EditText) mDialog.findViewById(R.id.choosePassword);
//gets password if exists
isPassword= ed.isEnabled();
if(isPassword){password=ed.getText().toString();}
//gets rooms name
ed = (EditText) mDialog.findViewById(R.id.chooseRoomsName);
roomName=ed.getText().toString();
//if the room's name is invalid:
if(roomName==null || roomName.length()<1){
// pop alert dialog and reload this dialog
new AlertDialog.Builder(MainScreenActivity.this)
.setTitle("Missing name error")
.setMessage("A room must have a name")
//yes button setter
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {mDialog.show();}})//setPositive
.setOnCancelListener(new OnCancelListener(){
public void onCancel(DialogInterface dialog){mDialog.show();}})
.show();
//end of alert dialog
}//if
else{//there is a room name
//the room is ready to be created
//call the service and create a new public chat room
if (password.equalsIgnoreCase(""))
password=null;
ChatSearchScreenFrag.mService.CreateNewHostedPublicChatRoom(roomName,password);
}//else
}//onClick dialog listener
})
.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {}
}).create();
}//end of ShowPublicChatCreationDialog()
}//end of class
虽然它是商业应用程序，但我必须分享这个，因为这个问题必须通过任何方式解决。
这是我卡在屏幕上时得到的日志猫：- logcat