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Android MediaPlayer create failed

My problem is the following:
I want to create a really simple App, that shall play a song when i press a button.
public class MainActivity extends ActionBarActivity {
int counter;
Button add1;
Button sub1;
Button sound;
TextView display;
MediaPlayer mySound;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_main);
if (mySound==null){
mySound = MediaPlayer.create(this, R.raw.tetris_theme);
}
else { mySound.release();
}
sound = (Button) findViewById(R.id.button1);
display = (TextView) findViewById(R.id.textView2);
sound.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//TODO Auto-generated method stub
if (mySound==null){
display.setText("Error");
}
else {
mySound.start();
}
}
});
}
#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, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends 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;
}
}
}
When I run the app and press the button "sound" it displays "Error"(since I checked whether mySound is null or not)
So, I figured that meant that the mySound MediaPLayer I created is null.
I checked the logcat and it showed the following:
11-25 14:27:02.900: E/MediaPlayer(1026): error (1, -2147483648)
11-25 14:27:02.920: D/MediaPlayer(1026): create failed:
11-25 14:27:02.920: D/MediaPlayer(1026): java.io.IOException: Prepare failed.: status=0x1
11-25 14:27:02.920: D/MediaPlayer(1026): at android.media.MediaPlayer.prepare(Native Method)
11-25 14:27:02.920: D/MediaPlayer(1026): at android.media.MediaPlayer.create(MediaPlayer.java:850)
11-25 14:27:02.920: D/MediaPlayer(1026): at com.example.simpleapp.MainActivity.onCreate(MainActivity.java:49)
11-25 14:27:02.920: D/MediaPlayer(1026): at android.app.Activity.performCreate(Activity.java:5242)
11-25 14:27:02.920: D/MediaPlayer(1026): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
11-25 14:27:02.920: D/MediaPlayer(1026): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2161)
11-25 14:27:02.920: D/MediaPlayer(1026): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2258)
11-25 14:27:02.920: D/MediaPlayer(1026): at android.app.ActivityThread.access$800(ActivityThread.java:138)
11-25 14:27:02.920: D/MediaPlayer(1026): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1209)
11-25 14:27:02.920: D/MediaPlayer(1026): at android.os.Handler.dispatchMessage(Handler.java:102)
11-25 14:27:02.920: D/MediaPlayer(1026): at android.os.Looper.loop(Looper.java:136)
11-25 14:27:02.920: D/MediaPlayer(1026): at android.app.ActivityThread.main(ActivityThread.java:5026)
11-25 14:27:02.920: D/MediaPlayer(1026): at java.lang.reflect.Method.invokeNative(Native Method)
11-25 14:27:02.920: D/MediaPlayer(1026): at java.lang.reflect.Method.invoke(Method.java:515)
11-25 14:27:02.920: D/MediaPlayer(1026): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:777)
11-25 14:27:02.920: D/MediaPlayer(1026): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)
11-25 14:27:02.920: D/MediaPlayer(1026): at dalvik.system.NativeStart.main(Native Method)
I guess that means that create failed, because prepare failed, but why?
I already searched for that problem on this website and found a hundred different cases but none
of the solutions did work for me.
the file I want to play is in mp3 and is located in my R.raw folder.
I can play it on my PC without any problems, so I guess it can't be corrupt or something.
I already tried with different types like .ogg and .aac but nothing(!!) works.

This will occur Your MediaPlayer object is not having any resource associated with it and so returned null.
Your file is having special characters. remove special characters and it must be in lower case.
mySound= MediaPlayer.create(this, R.raw.tetristheme);
your media file shoouldf be in the name tetristheme
Now you can use mySound.start() to start playing your media

java.lang.NullPointerException is caused by getContentResolver() in Fragment

I have this code below. It works before in Activity. Now I want to convert it to Fragment. I have tried context.getContentResolver(); or getActivity().getContentResolver(); But it doesn't work. How to fix this ?
public class MyFragmentA extends Fragment {
//song list variables
private ArrayList<Song> songList;
private ListView songView;
public Context context;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View myFragmentView = inflater.inflate(R.layout.fragment_a, container, false);
//retrieve list view
songView = (ListView) myFragmentView.findViewById(R.id.song_list);
//instantiate list
songList = new ArrayList<Song>();
//get songs from device
getSongList();
//sort alphabetically by title
Collections.sort(songList, new Comparator<Song>(){
public int compare(Song a, Song b){
return a.getTitle().compareTo(b.getTitle());
}
});
//create and set adapter
SongAdapter songAdt = new SongAdapter(this.getActivity(), songList);
songView.setAdapter(songAdt);
return myFragmentView;
}
public void getSongList() {
ContentResolver musicResolver = context.getContentResolver();
Uri musicUri = android.provider.MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
Cursor musicCursor = musicResolver.query(musicUri, null, null, null, null);
----------------------
----------------------
----------------------
----------------------
}
}
}
This my logcat trace
11-25 20:29:34.001: E/AndroidRuntime(4092): FATAL EXCEPTION: main
11-25 20:29:34.001: E/AndroidRuntime(4092): Process: com.ddev.delta, PID: 4092
11-25 20:29:34.001: E/AndroidRuntime(4092): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.ddev.delta/com.ddev.delta.AndroidNavigationTabsActivity}: java.lang.NullPointerException
11-25 20:29:34.001: E/AndroidRuntime(4092): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2212)
11-25 20:29:34.001: E/AndroidRuntime(4092): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2271)
11-25 20:29:34.001: E/AndroidRuntime(4092): at android.app.ActivityThread.access$800(ActivityThread.java:144)
11-25 20:29:34.001: E/AndroidRuntime(4092): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1205)
11-25 20:29:34.001: E/AndroidRuntime(4092): at android.os.Handler.dispatchMessage(Handler.java:102)
11-25 20:29:34.001: E/AndroidRuntime(4092): at android.os.Looper.loop(Looper.java:136)
11-25 20:29:34.001: E/AndroidRuntime(4092): at android.app.ActivityThread.main(ActivityThread.java:5146)
11-25 20:29:34.001: E/AndroidRuntime(4092): at java.lang.reflect.Method.invokeNative(Native Method)
11-25 20:29:34.001: E/AndroidRuntime(4092): at java.lang.reflect.Method.invoke(Method.java:515)
11-25 20:29:34.001: E/AndroidRuntime(4092): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:732)
11-25 20:29:34.001: E/AndroidRuntime(4092): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:566)
11-25 20:29:34.001: E/AndroidRuntime(4092): at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:132)
11-25 20:29:34.001: E/AndroidRuntime(4092): at dalvik.system.NativeStart.main(Native Method)
11-25 20:29:34.001: E/AndroidRuntime(4092): Caused by: java.lang.NullPointerException
11-25 20:29:34.001: E/AndroidRuntime(4092): at com.ddev.delta.AndroidNavigationTabsActivity.onCreate(AndroidNavigationTabsActivity.java:17)
11-25 20:29:34.001: E/AndroidRuntime(4092): at android.app.Activity.performCreate(Activity.java:5231)
11-25 20:29:34.001: E/AndroidRuntime(4092): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
11-25 20:29:34.001: E/AndroidRuntime(4092): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2169)
11-25 20:29:34.001: E/AndroidRuntime(4092): ... 12 more

ContentResolver musicResolver = context.getContentResolver();
Your context is not initialized.
Since you're in a fragment lifecycle callback onCreateView() or a method called from one, you can use getActivity() for a Context:
ContentResolver musicResolver = getActivity().getContentResolver();
Remove the Context context; declaration as unnecessary, too.

public Context context;
Your context is null, try use getActivity().getContentResolver();

Initialize context object in onCreateView() before call getSongList():
context = getActivity();
OR
getActivity().getContentResolver()

Create an object of Activity and then initialize it by
Activity a=getActivity();
And then use
ContentResolver musicResolver = a.getContentResolver();

Use Following for these Cases:
Application :- getApplicationContext()
activity :- context
Fragment :- getActivity()

Converter application error on Android

Hello guys I am making an Android app that convert from binary to decimal and I have made a class called Binary and a class called Decimal and a function in the Binary class that convert from decimal to binary
public Binary DtoB(Decimal decimal)
{
String temp = null;
do
{
if(decimal.decimal%2!=0)
temp+='1';
else
temp+='0';
decimal.decimal/=2;
}while(decimal.decimal>0);
while(temp.length()%4!=0)
temp+='0';
for(int i=temp.length()-1;i>=0;i--)
{
this.bn+=temp.charAt(i);
}
return this;
}
and in the activity there's a button that converts, but when I test and press on the button the app breaks
b1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
d1.decimal=Integer.parseInt(e1.getText().toString());
b.DtoB(d1);
t1.setText(b.bn);
}
});
can any one help me please ???
Here is the logcat:
10-26 09:16:15.831: E/AndroidRuntime(280): FATAL EXCEPTION: main
10-26 09:16:15.831: E/AndroidRuntime(280): java.lang.NullPointerException
10-26 09:16:15.831: E/AndroidRuntime(280): at com.example.converter.MainActivity$1.onClick(MainActivity.java:34)
10-26 09:16:15.831: E/AndroidRuntime(280): at android.view.View.performClick(View.java:2408)
10-26 09:16:15.831: E/AndroidRuntime(280): at android.view.View$PerformClick.run(View.java:8816)
10-26 09:16:15.831: E/AndroidRuntime(280): at android.os.Handler.handleCallback(Handler.java:587)
10-26 09:16:15.831: E/AndroidRuntime(280): at android.os.Handler.dispatchMessage(Handler.java:92)
10-26 09:16:15.831: E/AndroidRuntime(280): at android.os.Looper.loop(Looper.java:123) 10-26 09:16:15.831: E/AndroidRuntime(280): at android.app.ActivityThread.main(ActivityThread.java:4627)
10-26 09:16:15.831: E/AndroidRuntime(280): at java.lang.reflect.Method.invokeNative(Native Method) 10-26 09:16:15.831: E/AndroidRuntime(280): at java.lang.reflect.Method.invoke(Method.java:521)

Try this...!
public class BinaryToDecimal {
public int getDecimalFromBinary(int binary){
int decimal = 0;
int power = 0;
while(true){
if(binary == 0){
break;
} else {
int tmp = binary%10;
decimal += tmp*Math.pow(2, power);
binary = binary/10;
power++;
}
}
return decimal;
}
public static void main(String a[]){
BinaryToDecimal bd = new BinaryToDecimal();
System.out.println("11 ===> "+bd.getDecimalFromBinary(11));
System.out.println("110 ===> "+bd.getDecimalFromBinary(110));
System.out.println("100110 ===> "+bd.getDecimalFromBinary(100110));
}
}

check variable all are initialize perfectly . because some time objectc are created but it is null so can't work and throw java.lang.NullPointerException .....
b1 , d1 , b ,t1

Error in fetching data from database table

I am making an android app. and am trying to fetching data from column, name and score from
the database table but getting this error at run time,
Sorry this application has stopped unexpectedly.
This is my Code from Database Class,
public long addscore(String name, int score)
{
ContentValues values = new ContentValues();
values.put(KEY_name, name);
values.put(KEY_score, score);
// Inserting Row
return db.insert(DATABASE_TABLE, null, values);
}
public Cursor getScore(long rowId) throws SQLException
{
Cursor mCursor = db.query(true,DATABASE_TABLE, new String[] {
KEY_scoreid,KEY_name,KEY_score },,KEY_scoreid + "="
+ rowid,null,null,null,null,null);
if (mCursor != null)
{
mCursor.moveToFirst();
}
return mCursor;
}
And this is the code of class from where i m trying to
fetch the Data from Database table (Highscore.java),
public class Highscore extends Activity
{
TextView name1,name2,name3,name4,name5,score1,score2,score3,score4,score5;
DBAdapter db1;
Cursor c;
int id;
String n1,n2,n3,n4,n5;
String s1,s2,s3,s4,s5;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.highscore);
Button backbtn=(Button)findViewById(R.id.backbtn);
OnClickListener listener=new OnClickListener()
{
public void onClick(View v)
{
Intent i=new Intent(Highscore.this,MainActivity.class);
startActivity(i);
finish();
}
};
backbtn.setOnClickListener(listener);
id=1;
name1=(TextView)findViewById(R.id.name1);
score1=(TextView)findViewById(R.id.score1);
db1=new DBAdapter(this);
db1.open();
c=db1.getScore(1);
n1=c.getString(1);
name1.setText(n1);
s1=c.getString(2);
score1.setText(s1);
c=db1.getScore(2);
n2=c.getString(1);
name2.setText(n2);
s2=c.getString(2);
score2.setText(s2);
c=db1.getScore(3);
n3=c.getString(1);
name3.setText(n3);
s3=c.getString(2);
score3.setText(s3);
id++;
c=db1.getScore(4);
n4=c.getString(1);
name4.setText(n4);
s4=c.getString(2);
score4.setText(s4);
id++;
c=db1.getScore(5);
n5=c.getString(1);
name5.setText(n5);
s5=c.getString(2);
score5.setText(s5);
c.deactivate();
c.close();
db1.close();
}
}
This time i am only fetching 5 names and scores.
Here's my Logcat Error,
09-19 12:01:36.046: D/AndroidRuntime(455): Shutting down VM
09-19 12:01:36.046: W/dalvikvm(455): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
09-19 12:01:36.066: E/AndroidRuntime(455): FATAL EXCEPTION: main
09-19 12:01:36.066: E/AndroidRuntime(455): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.quizapp/com.example.quizapp.Highscore}: java.lang.NullPointerException
09-19 12:01:36.066: E/AndroidRuntime(455): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
09-19 12:01:36.066: E/AndroidRuntime(455): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
09-19 12:01:36.066: E/AndroidRuntime(455): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
09-19 12:01:36.066: E/AndroidRuntime(455): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
09-19 12:01:36.066: E/AndroidRuntime(455): at android.os.Handler.dispatchMessage(Handler.java:99)
09-19 12:01:36.066: E/AndroidRuntime(455): at android.os.Looper.loop(Looper.java:123)
09-19 12:01:36.066: E/AndroidRuntime(455): at android.app.ActivityThread.main(ActivityThread.java:4627)
09-19 12:01:36.066: E/AndroidRuntime(455): at java.lang.reflect.Method.invokeNative(Native Method)
09-19 12:01:36.066: E/AndroidRuntime(455): at java.lang.reflect.Method.invoke(Method.java:521)
09-19 12:01:36.066: E/AndroidRuntime(455): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
09-19 12:01:36.066: E/AndroidRuntime(455): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
09-19 12:01:36.066: E/AndroidRuntime(455): at dalvik.system.NativeStart.main(Native Method)
09-19 12:01:36.066: E/AndroidRuntime(455): Caused by: java.lang.NullPointerException
09-19 12:01:36.066: E/AndroidRuntime(455): at com.example.quizapp.Highscore.onCreate(Highscore.java:59)
09-19 12:01:36.066: E/AndroidRuntime(455): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
09-19 12:01:36.066: E/AndroidRuntime(455): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
09-19 12:01:36.066: E/AndroidRuntime(455): ... 11 more
If you people are not getting any thing from my question so please ask..
Please help me to Solve out the Error.
Thanks in Advance

From what I see you problem is not in the database connection, you have some untreated exceptions. You have a NULL pointer exception also in onCreate(Highscore.java:59)
You can do a thing: comment parts of the code until you get a working app(that does nothing) and then uncomment until you find the exact code that crashes the app, it is easy to do and usually you will find the line that is problematic
Good luck

Use this code insted of your.....
public Cursor getScore(long rowId) throws SQLException
{
Cursor mCursor = db.query(true,DATABASE_TABLE, new String[] {
KEY_scoreid,KEY_name,KEY_score },KEY_scoreid + " ='"
+ rowid + "'",null,null,null,null,null);
if (mCursor != null)
{
mCursor.moveToFirst();
}
return mCursor;
}

SQLite crashes when trying to enter a String with a space

I am creating an application that has a default table that stores what the other tables are so that when your trying to put your own input into the app it will store the tables but when you try to add a table to the default table it works perfectly unless there is a space "test" would work perfect "test 1" would crash the app. This is my code retrieving the String that is inputed by the user:
t = new Table(this);
t.open();
final AlertDialog.Builder alert = new AlertDialog.Builder(this);
final EditText input = new EditText(this);
alert.setView(input);
alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
rListName = input.getText().toString();
t.createNew(rListName + "DB");
t.createList(rListName, rListName + "DB");
t.close();
}
});
alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
dialog.cancel();
}
});
alert.show();
This is my createNew and createList:
public void createNew(String TABLE_NAME){
if(DATABASE_STATUS == "new"){
ourHelper.createNew(ourDatabase, TABLE_NAME);
System.out.println("Creating " + TABLE_NAME);
}else{
System.out.print("Already Created");
}
}
public long createList(String listName, String listDB){
ContentValues cv = new ContentValues();
cv.put(KEY_LISTNAME, listName);
cv.put(KEY_LISTDB, listDB);
return ourDatabase.insert(DEFAULT_TABLE, null, cv);
}
my createNew() that is executed to make new tables
public void createNew(SQLiteDatabase db, String TABLE_NAME){
db.execSQL("CREATE TABLE " + TABLE_NAME + " (" +
KEY_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, " +
KEY_QUESTION + " TEXT NOT NULL, " +
KEY_PATH + " TEXT NOT NULL);"
);
}
last but not lease, my logcat:
11-25 22:02:30.418: I/SqliteDatabaseCpp(24726): sqlite returned: error code = 1, msg = near "helloDB": syntax error
11-25 22:02:30.428: D/AndroidRuntime(24726): Shutting down VM
11-25 22:02:30.428: W/dalvikvm(24726): threadid=1: thread exiting with uncaught exception (group=0x40ab9228)
11-25 22:02:30.438: E/AndroidRuntime(24726): FATAL EXCEPTION: main
11-25 22:02:30.438: E/AndroidRuntime(24726): android.database.sqlite.SQLiteException: near "helloDB": syntax error: , while compiling: CREATE TABLE hello helloDB (_id INTEGER PRIMARY KEY AUTOINCREMENT, question TEXT NOT NULL, path TEXT NOT NULL);
11-25 22:02:30.438: E/AndroidRuntime(24726): at android.database.sqlite.SQLiteCompiledSql.native_compile(Native Method)
11-25 22:02:30.438: E/AndroidRuntime(24726): at android.database.sqlite.SQLiteCompiledSql.<init>(SQLiteCompiledSql.java:68)
11-25 22:02:30.438: E/AndroidRuntime(24726): at android.database.sqlite.SQLiteProgram.compileSql(SQLiteProgram.java:141)
11-25 22:02:30.438: E/AndroidRuntime(24726): at android.database.sqlite.SQLiteProgram.compileAndbindAllArgs(SQLiteProgram.java:368)
11-25 22:02:30.438: E/AndroidRuntime(24726): at android.database.sqlite.SQLiteStatement.acquireAndLock(SQLiteStatement.java:272)
11-25 22:02:30.438: E/AndroidRuntime(24726): at android.database.sqlite.SQLiteStatement.executeUpdateDelete(SQLiteStatement.java:84)
11-25 22:02:30.438: E/AndroidRuntime(24726): at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:2031)
11-25 22:02:30.438: E/AndroidRuntime(24726): at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1971)
11-25 22:02:30.438: E/AndroidRuntime(24726): at com.mitterederStudios.Quiz.Table$DbHelper.createNew(Table.java:49)
11-25 22:02:30.438: E/AndroidRuntime(24726): at com.mitterederStudios.Quiz.Table.createNew(Table.java:94)
11-25 22:02:30.438: E/AndroidRuntime(24726): at com.mitterederStudios.Quiz.Menu$1.onClick(Menu.java:56)
11-25 22:02:30.438: E/AndroidRuntime(24726): at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:174)
11-25 22:02:30.438: E/AndroidRuntime(24726): at android.os.Handler.dispatchMessage(Handler.java:99)
11-25 22:02:30.438: E/AndroidRuntime(24726): at android.os.Looper.loop(Looper.java:154)
11-25 22:02:30.438: E/AndroidRuntime(24726): at android.app.ActivityThread.main(ActivityThread.java:4945)
11-25 22:02:30.438: E/AndroidRuntime(24726): at java.lang.reflect.Method.invokeNative(Native Method)
11-25 22:02:30.438: E/AndroidRuntime(24726): at java.lang.reflect.Method.invoke(Method.java:511)
11-25 22:02:30.438: E/AndroidRuntime(24726): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
11-25 22:02:30.438: E/AndroidRuntime(24726): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
11-25 22:02:30.438: E/AndroidRuntime(24726): at dalvik.system.NativeStart.main(Native Method)

You need to put quotes around your table name so its "test 1" if you really want spaces. However this is generally a bad idea, I would replace the spaces with underscores so it becomes test_1.