On Click Listener suddenly terminating the application

Question

I have a text box with OnClickListener(). Also whenever I type an alphabet in the text box, it reads it out aloud using some sound files. The problem is that after reading out/typing say 5-6 alphabets, the application unexpectedly terminates. I am not able to figure out the reason. Why is it so?

The code is here:

package com.example.newaa;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.widget.Button;
import android.view.View;
import android.view.View.OnClickListener;
import android.os.Bundle;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import android.support.v4.app.NavUtils;
import android.text.Editable;
import android.text.TextWatcher;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.widget.Button;
import android.view.View;
import android.view.View.OnClickListener;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.widget.Button;
import android.view.View;
import android.view.View.OnClickListener;

import android.os.Bundle;

public class Recipient extends Activity{
     public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.recipient);
            EditText a;
            a=(EditText)findViewById(R.id.editText3);
            a.addTextChangedListener(new TextWatcher(){ 
                @Override   
                public void afterTextChanged(Editable s) {   
                       //GET TEXT HERE AFTER TYPING DONE BY PERSON   

                    }   
                @Override   
                public void beforeTextChanged(CharSequence s,int start,int count,int after){  
                      //GET TEXT HERE BEFORE TYPING START BY PERSON

                    }   
                @SuppressLint("ParserError")
                @Override   
                public void onTextChanged(CharSequence s, int start, int before, int count) {   
                   //GET TYPED CHAR HERE 

                    char ch=s.charAt(s.length()-1);
                    if(ch=='a')
                    {

                        MediaPlayer mPlayer1 = MediaPlayer.create(Recipient.this, R.raw.a);
                        mPlayer1.start();
                    }
                    if(ch=='b')
                    {
                        MediaPlayer mPlayer2 = MediaPlayer.create(Recipient.this, R.raw.b);
                        mPlayer2.start();
                    }
                    if(ch=='c')
                    {
                        MediaPlayer mPlayer3 = MediaPlayer.create(Recipient.this, R.raw.c);
                        mPlayer3.start();
                    }
                    if(ch=='d')
                    {
                        MediaPlayer mPlayer4 = MediaPlayer.create(Recipient.this, R.raw.d);
                        mPlayer4.start();
                    }
                    if(ch=='e')
                    {
                        MediaPlayer mPlayer5 = MediaPlayer.create(Recipient.this, R.raw.e);
                        mPlayer5.start();
                    }
                    if(ch=='f')
                    {
                        MediaPlayer mPlayer6 = MediaPlayer.create(Recipient.this, R.raw.f);
                        mPlayer6.start();
                    }
                    if(ch=='g')
                    {
                        MediaPlayer mPlayer7 = MediaPlayer.create(Recipient.this, R.raw.g);
                        mPlayer7.start();
                    }
                    if(ch=='h')
                    {
                        MediaPlayer mPlayer8 = MediaPlayer.create(Recipient.this, R.raw.h);
                        mPlayer8.start();
                    }
                    if(ch=='i')
                    {
                        MediaPlayer mPlayer9 = MediaPlayer.create(Recipient.this, R.raw.i);
                        mPlayer9.start();
                    }
                    if(ch=='j')
                    {
                        MediaPlayer mPlayer10 = MediaPlayer.create(Recipient.this, R.raw.j);
                        mPlayer10.start();
                    }
                    if(ch=='k')
                    {
                        MediaPlayer mPlayer11 = MediaPlayer.create(Recipient.this, R.raw.k);
                        mPlayer11.start();
                    }
                    if(ch=='l')
                    {
                        MediaPlayer mPlayer12 = MediaPlayer.create(Recipient.this, R.raw.l);
                        mPlayer12.start();
                    }
                    if(ch=='m')
                    {
                        MediaPlayer mPlayer13 = MediaPlayer.create(Recipient.this, R.raw.m);
                        mPlayer13.start();
                    }
                    if(ch=='n')
                    {
                        MediaPlayer mPlayer14 = MediaPlayer.create(Recipient.this, R.raw.n);
                        mPlayer14.start();
                    }
                    if(ch=='o')
                    {
                        MediaPlayer mPlayer15 = MediaPlayer.create(Recipient.this, R.raw.o);
                        mPlayer15.start();
                    }
                    if(ch=='p')
                    {
                        MediaPlayer mPlayer16 = MediaPlayer.create(Recipient.this, R.raw.p);
                        mPlayer16.start();
                    }
                    if(ch=='q')
                    {
                        MediaPlayer mPlayer17 = MediaPlayer.create(Recipient.this, R.raw.q);
                        mPlayer17.start();
                    }
                    if(ch=='r')
                    {
                        MediaPlayer mPlayer18 = MediaPlayer.create(Recipient.this, R.raw.r);
                        mPlayer18.start();
                    }
                    if(ch=='s')
                    {
                        MediaPlayer mPlayer19 = MediaPlayer.create(Recipient.this, R.raw.s);
                        mPlayer19.start();
                    }
                    if(ch=='t')
                    {
                        MediaPlayer mPlayer20 = MediaPlayer.create(Recipient.this, R.raw.t);
                        mPlayer20.start();
                    }
                    if(ch=='u')
                    {
                        MediaPlayer mPlayer21 = MediaPlayer.create(Recipient.this, R.raw.u);
                        mPlayer21.start();
                    }
                    if(ch=='v')
                    {
                        MediaPlayer mPlayer22 = MediaPlayer.create(Recipient.this, R.raw.v);
                        mPlayer22.start();
                    }
                    if(ch=='w')
                    {
                        MediaPlayer mPlayer23 = MediaPlayer.create(Recipient.this, R.raw.w);
                        mPlayer23.start();
                    }
                    if(ch=='x')
                    {
                        MediaPlayer mPlayer24 = MediaPlayer.create(Recipient.this, R.raw.x);
                        mPlayer24.start();
                    }
                    if(ch=='y')
                    {
                        MediaPlayer mPlayer25 = MediaPlayer.create(Recipient.this, R.raw.y);
                        mPlayer25.start();
                    }
                    if(ch=='z')
                    {
                        MediaPlayer mPlayer26 = MediaPlayer.create(Recipient.this, R.raw.z);
                        mPlayer26.start();
                    }
                  }   
                });
     }

}

The logcat is here:

07-05 08:08:42.153: E/AndroidRuntime(321): Uncaught handler: thread main exiting due to uncaught exception
07-05 08:08:42.183: E/AndroidRuntime(321): java.lang.NullPointerException
07-05 08:08:42.183: E/AndroidRuntime(321):  at com.example.newaa.Recipient$1.onTextChanged(Recipient.java:79)
07-05 08:08:42.183: E/AndroidRuntime(321):  at android.widget.TextView.sendOnTextChanged(TextView.java:6131)
07-05 08:08:42.183: E/AndroidRuntime(321):  at android.widget.TextView.handleTextChanged(TextView.java:6172)
07-05 08:08:42.183: E/AndroidRuntime(321):  at android.widget.TextView$ChangeWatcher.onTextChanged(TextView.java:6316)
07-05 08:08:42.183: E/AndroidRuntime(321):  at android.text.SpannableStringBuilder.sendTextChange(SpannableStringBuilder.java:889)
07-05 08:08:42.183: E/AndroidRuntime(321):  at android.text.SpannableStringBuilder.change(SpannableStringBuilder.java:352)
07-05 08:08:42.183: E/AndroidRuntime(321):  at android.text.SpannableStringBuilder.change(SpannableStringBuilder.java:269)
07-05 08:08:42.183: E/AndroidRuntime(321):  at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:432)
07-05 08:08:42.183: E/AndroidRuntime(321):  at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:409)
07-05 08:08:42.183: E/AndroidRuntime(321):  at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:28)
07-05 08:08:42.183: E/AndroidRuntime(321):  at android.view.inputmethod.BaseInputConnection.replaceText(BaseInputConnection.java:578)
07-05 08:08:42.183: E/AndroidRuntime(321):  at android.view.inputmethod.BaseInputConnection.commitText(BaseInputConnection.java:174)
07-05 08:08:42.183: E/AndroidRuntime(321):  at com.android.internal.widget.EditableInputConnection.commitText(EditableInputConnection.java:120)
07-05 08:08:42.183: E/AndroidRuntime(321):  at com.android.internal.view.IInputConnectionWrapper.executeMessage(IInputConnectionWrapper.java:231)
07-05 08:08:42.183: E/AndroidRuntime(321):  at com.android.internal.view.IInputConnectionWrapper$MyHandler.handleMessage(IInputConnectionWrapper.java:57)
07-05 08:08:42.183: E/AndroidRuntime(321):  at android.os.Handler.dispatchMessage(Handler.java:99)
07-05 08:08:42.183: E/AndroidRuntime(321):  at android.os.Looper.loop(Looper.java:123)
07-05 08:08:42.183: E/AndroidRuntime(321):  at android.app.ActivityThread.main(ActivityThread.java:4363)
07-05 08:08:42.183: E/AndroidRuntime(321):  at java.lang.reflect.Method.invokeNative(Native Method)
07-05 08:08:42.183: E/AndroidRuntime(321):  at java.lang.reflect.Method.invoke(Method.java:521)
07-05 08:08:42.183: E/AndroidRuntime(321):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
07-05 08:08:42.183: E/AndroidRuntime(321):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
07-05 08:08:42.183: E/AndroidRuntime(321):  at dalvik.system.NativeStart.main(Native Method)

Put your LogCat detail, so we can figure out the actual problem. — Dipali, Jul 05 '12 at 02:35
One more thing...I am not stopping the media files using stop(). Does that create a problem? — Aakash Anuj, Jul 05 '12 at 02:36
@ParthDoshi Please check the logcat and figure out the problem — Aakash Anuj, Jul 05 '12 at 02:46
@Candy Now that I have pasted the code, can you tell me the reason its crashing after playing some 4-5 sounds? — Aakash Anuj, Jul 05 '12 at 02:53
the logcat said u've got a `NullPointerException` at line 79... — C. Leung, Jul 05 '12 at 03:17

Kumar Vivek Mitra · Accepted Answer · 2012-07-05T03:08:36.840

1

EDITED PART.....

Try to release the mediaplayer once the sound is player... And no need to create multiple instances of the mediaplayer... Reinitialize the same one at the starting..

edited Jul 05 '12 at 03:08

answered Jul 05 '12 at 03:00

Kumar Vivek Mitra

33,294
6
48
75

Not at all. That is not what is causing the problem. I need to know why the code crashes after playing 4-5 sound files. – Aakash Anuj Jul 05 '12 at 03:05
How to release it just after it has stopped playing? – Aakash Anuj Jul 05 '12 at 03:10
after start, wait for .5 sec, and then release it... use sleep() or handler's post delay – Kumar Vivek Mitra Jul 05 '12 at 03:14
I used if (mPlayer != null && mPlayer.isPlaying()) in each of the if statements...but it still gives the same error :( – Aakash Anuj Jul 05 '12 at 03:24

score 0 · Answer 2 · edited May 23 '17 at 10:09

0

You got error due to passing Illegal Activity Context (NULL Context) to any method or other activity.

Refer Uncaught handler: thread main exiting due to uncaught exception , that have the similar problem. You may figure out the problem area.

edited May 23 '17 at 10:09

Community

1
1

answered Jul 05 '12 at 02:56

Dipali

374
2
5
22

On Click Listener suddenly terminating the application

2 Answers2