I have a problem with setOnEditorActionListener, I can't understand why it makes the application crash. I followed the guide on the Android Developers website and googled for about 2 hours but I can't find a solution... The code looks fine to me, the only thing I think could be the problem is the fact that I created the Activity with Android Studio using the Navigation Drawer preset; but I still can't see the problem. Can someone help me? Thanks in advance.
Activity
package com.ran3000.notefication;
import android.app.Activity;
import android.app.NotificationManager;
import android.support.v4.app.NotificationCompat;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.support.v4.widget.DrawerLayout;
import android.view.Window;
import android.view.WindowManager;
import android.view.inputmethod.EditorInfo;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.TextView.OnEditorActionListener;
import com.ran3000.notefication.notificationBarColor;
public class MainActivity extends ActionBarActivity
implements NavigationDrawerFragment.NavigationDrawerCallbacks {
/**
* Fragment managing the behaviors, interactions and presentation of the navigation drawer.
*/
private NavigationDrawerFragment mNavigationDrawerFragment;
// Sets an ID for the notification
int mNotificationId = 001;
NotificationCompat.Builder mBuilder;
NotificationManager mNotifyMgr;
EditText noteText;
/**
* Used to store the last screen title. For use in {@link #restoreActionBar()}.
*/
private CharSequence mTitle;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
noteText = (EditText) findViewById(R.id.write_note);
getSupportActionBar().hide();
Window window = getWindow();
notificationBarColor.changeStatusBarColor(window, getResources().getColor(R.color.darken_green));
setContentView(R.layout.activity_main);
mNavigationDrawerFragment = (NavigationDrawerFragment)
getSupportFragmentManager().findFragmentById(R.id.navigation_drawer);
mTitle = getTitle();
// Set up the drawer.
mNavigationDrawerFragment.setUp(R.id.navigation_drawer,
(DrawerLayout) findViewById(R.id.drawer_layout));
mBuilder = new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.ic_stat_notification_icon)
.setContentText("preset text")
.setContentTitle("Notefication");
// Gets an instance of the NotificationManager service
mNotifyMgr = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
// noteText.setOnEditorActionListener(new OnEditorActionListener() {
// @Override
// public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
// boolean handled = false;
// if (actionId == EditorInfo.IME_ACTION_SEND) {
// mBuilder.setContentText(v.getText());
// // Builds the notification and issues it.
// mNotifyMgr.notify(++mNotificationId, mBuilder.build());
// handled = true;
// }
// return handled;
// }
// });
noteText.setOnEditorActionListener(new OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView textView, int i, KeyEvent keyEvent) {
return false;
}
});
}
@Override
public void onNavigationDrawerItemSelected(int position) {
// update the main content by replacing fragments
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.container, PlaceholderFragment.newInstance(position + 1))
.commit();
}
public void onSectionAttached(int number) {
switch (number) {
case 1:
mTitle = getString(R.string.title_section1);
break;
case 2:
mTitle = getString(R.string.title_section2);
break;
case 3:
mTitle = getString(R.string.title_section3);
break;
}
}
public void restoreActionBar() {
ActionBar actionBar = getSupportActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
actionBar.setDisplayShowTitleEnabled(false);
actionBar.setTitle(mTitle);
actionBar.hide();
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
private static final String ARG_SECTION_NUMBER = "section_number";
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static PlaceholderFragment newInstance(int sectionNumber) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
return rootView;
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
((MainActivity) activity).onSectionAttached(
getArguments().getInt(ARG_SECTION_NUMBER));
}
}
}
XML
<RelativeLayout xmlns:android="http://ift.tt/nIICcg"
xmlns:tools="http://ift.tt/LrGmb4" android:layout_width="match_parent"
android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context=".MainActivity$PlaceholderFragment"
android:background="#ff00f045">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:id="@+id/textView"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:textColor="#ffffffff"
android:textSize="64sp"
android:text="@string/main_header"
android:textStyle="bold" />
<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/write_note"
android:background="@drawable/edit_text_outline"
android:layout_below="@+id/textView"
android:textSize="22sp"
android:textColor="#ffffffff"
android:textColorHint="#c8ffffff"
android:layout_marginTop="42dp"
android:inputType="textAutoCorrect|textCapSentences"
android:imeOptions="actionSend"
android:hint="@string/edit_text_hint" />
Logcat
Process: com.ran3000.notefication, PID: 3636
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.ran3000.notefication/com.ran3000.notefication.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.EditText.setOnEditorActionListener(android.widget.TextView$OnEditorActionListener)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
at android.app.ActivityThread.access$800(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.EditText.setOnEditorActionListener(android.widget.TextView$OnEditorActionListener)' on a null object reference
at com.ran3000.notefication.MainActivity.onCreate(MainActivity.java:88)
at android.app.Activity.performCreate(Activity.java:5937)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
at android.app.ActivityThread.access$800(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
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