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Getting Integer Value From a TextField

I'm trying to take an RGB value (not hexadecimal, the actual constant value, such as -16711936) from a textfield and display it in a new activity (to use it as an integer). I attempted to do this by converting the string to an integer, but it still ends up crashing the program. Here's the code:
FULL SOURCE:issue occurs in testvalue function
package com.example.seniordesign;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.view.Menu;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
public class MainActivity extends Activity { //1
//public final static String RGB_VALUE = "com.example.seniordesign.RGB_VALUE_USE";
TextView pixelcord, rgbvals, rgbnumvals, red, green, blue, RGB;
ImageView iv;
Button btn;
#Override
public void onCreate(Bundle savedInstanceState) { //2
/* GATHER THE INFORMATION FROM THE LAYOUT TO ORGANIZE APP*/
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
/* SET ON CLICK LISTENER TO GET CLICK REPSONSE -- LAUNCH CAMERA AND TAKE PHOTO */
/* SET VARIABLES FOR USE FROM EACH VIEW */
iv = (ImageView) findViewById(R.id.imageView); /* USE IMAGE VIEW FIELD*/
pixelcord = (TextView)findViewById(R.id.pixelcord); /* USE TEXT FIELD FOR PIXEL */
rgbvals = (TextView)findViewById(R.id.rgbvals); /* USE TEXT FIELD FOR RGB VALUES*/
btn = (Button) findViewById(R.id.takePhoto);
/* SET INFORMATION OF WHAT TO DO UPON EACH CLIK*/
iv.setOnTouchListener(imgSourceOnTouchListener);
red = (TextView)findViewById(R.id.red);
blue = (TextView)findViewById(R.id.blue);
green = (TextView)findViewById(R.id.green);
RGB = (TextView)findViewById(R.id.RGB);
/* =====================================CAMERA BUTTON=====================================*/
btn.setOnClickListener(new OnClickListener() { //3
#Override
public void onClick(View v) { //4
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, 0);
} //*4
}); //*3
/* =======================================================================================*/
} /* END OF ON CREATE*/ //*2
/* DECLARATION OF IMG TOUCH FUNCTION*/
OnTouchListener imgSourceOnTouchListener = new OnTouchListener() { //5
#Override
public boolean onTouch(View view, MotionEvent event) { //6
float eventX = event.getX();
float eventY = event.getY();
float[] eventXY = new float[] { eventX, eventY};
Matrix invertMatrix = new Matrix();
((ImageView)view).getImageMatrix().invert(invertMatrix);
invertMatrix.mapPoints(eventXY);
int x = Integer.valueOf((int)eventXY[0]); /* POTENTIALLY REDUNDANT*/
int y = Integer.valueOf((int)eventXY[1]);
/* CHECK TO MAKE SURE VALUES ARE WITHIN BITMAP RANGE*/
/* SET TEXT FUNCTION TO THE FIELD USING SET TEXT METHOD*/
pixelcord.setText("X:" + String.valueOf(eventX) + "/ Y:" + String.valueOf(eventY) );
Bitmap bitmap = ((BitmapDrawable)iv.getDrawable()).getBitmap();
int touchedRGB = bitmap.getPixel(x,y);
rgbvals.setText("Color Value" + "#" + Integer.toHexString(touchedRGB));
rgbvals.setTextColor(touchedRGB);
int rval = Color.red(touchedRGB);
int bval = Color.blue(touchedRGB);
int gval = Color.green(touchedRGB);
red.setText(String.valueOf(rval));
blue.setText(String.valueOf(bval));
green.setText(String.valueOf(gval));
RGB.setText(String.valueOf(touchedRGB));
return true;
} //*6
}; //*5
public void testvalue(View view) {
Intent intent = new Intent(this, TestValue.class);
TextView RGBval = (TextView) findViewById(R.id.RGB);
int rgb_val_use = Integer.parseInt((String) RGBval.getText().toString());
intent.putExtra("RGB_VALUE", (int)rgb_val_use);
startActivity(intent);
}
#Override
public void onActivityResult( int requestCode, int resultCode, Intent data)
{ //7
if(requestCode == 0)
{ //8
Bitmap theImage = (Bitmap) data.getExtras().get("data");
iv.setImageBitmap(theImage);
} //*8
} //*7
} //*1
and here is my logCat:
10-31 07:27:44.334: E/AndroidRuntime(9915): FATAL EXCEPTION: main
10-31 07:27:44.334: E/AndroidRuntime(9915): java.lang.IllegalStateException: Could not execute method of the activity
10-31 07:27:44.334: E/AndroidRuntime(9915): at android.view.View$1.onClick(View.java:2144)
10-31 07:27:44.334: E/AndroidRuntime(9915): at android.view.View.performClick(View.java:2485)
10-31 07:27:44.334: E/AndroidRuntime(9915): at android.view.View$PerformClick.run(View.java:9089)
10-31 07:27:44.334: E/AndroidRuntime(9915): at android.os.Handler.handleCallback(Handler.java:587)
10-31 07:27:44.334: E/AndroidRuntime(9915): at android.os.Handler.dispatchMessage(Handler.java:92)
10-31 07:27:44.334: E/AndroidRuntime(9915): at android.os.Looper.loop(Looper.java:123)
10-31 07:27:44.334: E/AndroidRuntime(9915): at android.app.ActivityThread.main(ActivityThread.java:3806)
10-31 07:27:44.334: E/AndroidRuntime(9915): at java.lang.reflect.Method.invokeNative(Native Method)
10-31 07:27:44.334: E/AndroidRuntime(9915): at java.lang.reflect.Method.invoke(Method.java:507)
10-31 07:27:44.334: E/AndroidRuntime(9915): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
10-31 07:27:44.334: E/AndroidRuntime(9915): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
10-31 07:27:44.334: E/AndroidRuntime(9915): at dalvik.system.NativeStart.main(Native Method)
10-31 07:27:44.334: E/AndroidRuntime(9915): Caused by: java.lang.reflect.InvocationTargetException
10-31 07:27:44.334: E/AndroidRuntime(9915): at java.lang.reflect.Method.invokeNative(Native Method)
10-31 07:27:44.334: E/AndroidRuntime(9915): at java.lang.reflect.Method.invoke(Method.java:507)
10-31 07:27:44.334: E/AndroidRuntime(9915): at android.view.View$1.onClick(View.java:2139)
10-31 07:27:44.334: E/AndroidRuntime(9915): ... 11 more
10-31 07:27:44.334: E/AndroidRuntime(9915): Caused by: java.lang.NumberFormatException: unable to parse 'RGB' as integer
10-31 07:27:44.334: E/AndroidRuntime(9915): at java.lang.Integer.parse(Integer.java:383)
10-31 07:27:44.334: E/AndroidRuntime(9915): at java.lang.Integer.parseInt(Integer.java:372)
10-31 07:27:44.334: E/AndroidRuntime(9915): at java.lang.Integer.parseInt(Integer.java:332)
10-31 07:27:44.334: E/AndroidRuntime(9915): at com.example.seniordesign.MainActivity.testvalue(MainActivity.java:125)
10-31 07:27:44.334: E/AndroidRuntime(9915): ... 14 more
Is it just a syntax error or am I going about this incorrectly? I appreciate the help
NOTE: The value in the textfield is techinically a string I guess, this is the code I used to place it in the field (touchedRGB is an integer value).
RGB.setText(String.valueOf(touchedRGB));
If it makes a difference, this is the XML from this particular section
<TextView
android:id="#+id/RGB"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/green"
android:layout_alignBottom="#+id/green"
android:layout_marginLeft="40dp"
android:layout_toRightOf="#+id/green"
android:text="RGB" />

The problem is, you have a string("RGB") in your textView. So you got a NumberFormatException.
Set an integet value in your textView and try again.
java.lang.NumberFormatException: unable to parse 'RGB' as integer
Edit: Could you try code below?
public void testvalue(View view) {
try{
TextView RGBval = (TextView) findViewById(R.id.RGB);
String valueStoredInRGBvalTextView = RGBval.getText().toString();
int rgb_val_use = Integer.parseInt(valueStoredInRGBvalTextView);
Intent intent = new Intent(this, TestValue.class);
intent.putExtra("RGB_VALUE", (int)rgb_val_use);
startActivity(intent);
} catch (Exception e) {
// Not touched yet
}
}
Edit2:
You are setting the integer touch value to RGB textView after first touch occurs. If you invoke your testvalue method before touching anywhere, you'll get this exception. Change your testvalue method as I wrote above. Your problem will be solved.

try this you cannot cast the int value to String like this -> (int)(rgb_val_use)
change it into new Integer.toString(rgb_val_use);
intent.putExtra("RGB_VALUE",new Integer.toString(rgb_val_use));

Integer rgb = Integer.getInteger((String) RGBval.getText(), null);
if (rgb == null) {
// input string is not integer
} else {
// use rgb to start new activity
}

Unable to instantiate activity ComponentInfo{com.example.ragefacefolks/com.example.ragefacefolks.MainActivity}: java.lang.NullPointerException

Today is my first day with java. I can not figure out the reason of this error.
MainActivity.java is like this below
package com.example.ragefacefolks;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.MenuInflater;
import android.view.View;
import android.view.ContextMenu.ContextMenuInfo;
import android.widget.Button;
import android.app.Activity;
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
Button bMain = (Button) findViewById(R.id.button1);
#Override
public void registerForContextMenu(View view) {
// TODO Auto-generated method stub
super.registerForContextMenu(bMain);
}
#Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
// TODO Auto-generated method stub
super.onCreateContextMenu(menu, v, menuInfo);
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.context_menu, menu);
}
}
wont be hard for you guys to know its reaon. Need a little help.
log cat is showing these results
09-27 07:59:24.677: D/AndroidRuntime(555): Shutting down VM
09-27 07:59:24.677: W/dalvikvm(555): threadid=1: thread exiting with uncaught exception (group=0x40015560)
09-27 07:59:24.707: E/AndroidRuntime(555): FATAL EXCEPTION: main
09-27 07:59:24.707: E/AndroidRuntime(555): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.ragefacefolks/com.example.ragefacefolks.MainActivity}: java.lang.NullPointerException
09-27 07:59:24.707: E/AndroidRuntime(555): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1569)
09-27 07:59:24.707: E/AndroidRuntime(555): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
09-27 07:59:24.707: E/AndroidRuntime(555): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
09-27 07:59:24.707: E/AndroidRuntime(555): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
09-27 07:59:24.707: E/AndroidRuntime(555): at android.os.Handler.dispatchMessage(Handler.java:99)
09-27 07:59:24.707: E/AndroidRuntime(555): at android.os.Looper.loop(Looper.java:123)
09-27 07:59:24.707: E/AndroidRuntime(555): at android.app.ActivityThread.main(ActivityThread.java:3683)
09-27 07:59:24.707: E/AndroidRuntime(555): at java.lang.reflect.Method.invokeNative(Native Method)

This
Button bMain = (Button) findViewById(R.id.button1);
Should be in onCreate after setContentView. You initialize it outside of any method
private Button bMain;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
bMain = (Button) findViewById(R.id.button1);
}

You cannot call:
Button bMain = (Button) findViewById(R.id.button1);
in the class like that (specifically, cannot be called before onCreate).
Move this code to onCreate.

Remove line
Button bMain = (Button) findViewById(R.id.button1);
and change onCreate method.-
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button bMain = (Button) findViewById(R.id.button1);
registerForContextMenu(bMain);
}
There's no need to override registerForContextMenu method.

try catch - Unable to instantiate activity ComponentInfo

I have two methods to update and delete data in my app, I have implemeted try catches within my switch statement and am now getting the following error:
01-14 20:38:58.778: D/AndroidRuntime(273): Shutting down VM
01-14 20:38:58.778: W/dalvikvm(273): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
01-14 20:38:58.798: E/AndroidRuntime(273): FATAL EXCEPTION: main
01-14 20:38:58.798: E/AndroidRuntime(273): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.flybase2/com.example.flybase2.viewEdit}: java.lang.NullPointerException
01-14 20:38:58.798: E/AndroidRuntime(273): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
01-14 20:38:58.798: E/AndroidRuntime(273): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
01-14 20:38:58.798: E/AndroidRuntime(273): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
01-14 20:38:58.798: E/AndroidRuntime(273): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
01-14 20:38:58.798: E/AndroidRuntime(273): at android.os.Handler.dispatchMessage(Handler.java:99)
01-14 20:38:58.798: E/AndroidRuntime(273): at android.os.Looper.loop(Looper.java:123)
01-14 20:38:58.798: E/AndroidRuntime(273): at android.app.ActivityThread.main(ActivityThread.java:4627)
01-14 20:38:58.798: E/AndroidRuntime(273): at java.lang.reflect.Method.invokeNative(Native Method)
01-14 20:38:58.798: E/AndroidRuntime(273): at java.lang.reflect.Method.invoke(Method.java:521)
01-14 20:38:58.798: E/AndroidRuntime(273): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
01-14 20:38:58.798: E/AndroidRuntime(273): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
01-14 20:38:58.798: E/AndroidRuntime(273): at dalvik.system.NativeStart.main(Native Method)
01-14 20:38:58.798: E/AndroidRuntime(273): Caused by: java.lang.NullPointerException
01-14 20:38:58.798: E/AndroidRuntime(273): at com.example.flybase2.viewEdit.<init>(viewEdit.java:63)
01-14 20:38:58.798: E/AndroidRuntime(273): at java.lang.Class.newInstanceImpl(Native Method)
01-14 20:38:58.798: E/AndroidRuntime(273): at java.lang.Class.newInstance(Class.java:1429)
01-14 20:38:58.798: E/AndroidRuntime(273): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
01-14 20:38:58.798: E/AndroidRuntime(273): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
01-14 20:38:58.798: E/AndroidRuntime(273): ... 11 more
Can anyone see the issue? It works perfectly without the try catches.
Heres the class:
package com.example.flybase2;
import android.app.Activity;
import android.app.Dialog;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class viewEdit extends Activity implements OnClickListener{
EditText namePassedEdit;
EditText numPassedEdit;
EditText emailPassedEdit;
EditText commentPassedEdit;
Button bUpdate;
Button bDelete;
long passedID = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.editview);
DBHandler displayEdit = new DBHandler(this, null, null);
Bundle extras = getIntent().getExtras();
if (extras != null) {
passedID = extras.getLong("passedID");
}
displayEdit.open();
String returnedNameToEdit = displayEdit.getName(passedID);
String returnedNumToEdit = displayEdit.getNum(passedID);
String returnedEmailToEdit = displayEdit.getEmail(passedID);
String returnedCommentToEdit = displayEdit.getComments(passedID);
namePassedEdit = (EditText) findViewById(R.id.inputNameEdit);
numPassedEdit = (EditText) findViewById(R.id.inputTelNoEdit);
emailPassedEdit = (EditText) findViewById(R.id.inputEmailEdit);
commentPassedEdit = (EditText) findViewById(R.id.inputCommentEdit);
bUpdate = (Button) findViewById (R.id.btnAddConEdit);
bDelete = (Button) findViewById (R.id.btnDeleteContact);
namePassedEdit.setText(returnedNameToEdit);
numPassedEdit.setText(returnedNumToEdit);
emailPassedEdit.setText(returnedEmailToEdit);
commentPassedEdit.setText(returnedCommentToEdit);
bUpdate.setOnClickListener(this);
bDelete.setOnClickListener(this);
}
String nameEdit = namePassedEdit.getText().toString();
String telEdit = numPassedEdit.getText().toString();
String emailEdit = emailPassedEdit.getText().toString();
String commentEdit = commentPassedEdit.getText().toString();
#Override
public void onClick(View updateOrDeleteClicked) {
boolean check = true;
switch(updateOrDeleteClicked.getId()){
case (R.id.btnAddConEdit):
try
{
DBHandler updateData = new DBHandler(this, null, null);
updateData.open();
updateData.updateData(passedID, nameEdit, telEdit, emailEdit, commentEdit);
}
catch (Exception e)
{
check = false;
Dialog d = new Dialog(this);
d.setTitle("Contact failed to be deleted.");
TextView txt = new TextView(this);
txt.setText("Fail");
d.setContentView(txt);
d.show();
}
finally
{
if(check = true);
{
Dialog e = new Dialog(this);
e.setTitle("Contact deleted.");
TextView txt = new TextView(this);
txt.setText("Success");
e.setContentView(txt);
e.show();
}
}
break;
case (R.id.btnDeleteContact):
try
{
DBHandler deleteContact = new DBHandler(this, null, null);
deleteContact.open();
deleteContact.deleteData(passedID);
}
catch (Exception e)
{
check = false;
Dialog d = new Dialog(this);
d.setTitle("Contact failed to be deleted.");
TextView txt = new TextView(this);
txt.setText("Fail");
d.setContentView(txt);
d.show();
}
finally
{
if(check = true);
{
Dialog e = new Dialog(this);
e.setTitle("Contact deleted.");
TextView txt = new TextView(this);
txt.setText("Success");
e.setContentView(txt);
e.show();
}
}
break;
}
}
}

String nameEdit = namePassedEdit.getText().toString();
String telEdit = numPassedEdit.getText().toString();
String emailEdit = emailPassedEdit.getText().toString();
String commentEdit = commentPassedEdit.getText().toString();
These lines aren't inside a method, and you can't use them like that. You're getting a null pointer on namePassedEdit because it's trying to initialize them when the class is created, and they aren't assigned anything yet.

One issue I see here is:
if(check = true); //This ends if statement here and here you are assigning true to check nothing more than that..
I guess what you need here is:
if(check){....}

The main problem I can find is that you close the braces for your onCreate on line 59. Leaving the following lines between functions.
String nameEdit = namePassedEdit.getText().toString();
String telEdit = numPassedEdit.getText().toString();
String emailEdit = emailPassedEdit.getText().toString();
String commentEdit = commentPassedEdit.getText().toString();
If you move these up into the onCreate it will probably fix your issue. Also as #Nambari said in their answer, in your if statements you are checking if check was set to true. You need to change this to:
if(check)

Media Player and If Statements

So what I am trying to create is an activity that displays an image button. The background for the image button points to an xml in the drawable folder to show the different pictures for on focus and click. That all works fine. I have music in my main activity that is set to loop. By default the image button is set to say Music On. What I want to happen is when the button is clicked the main sound will pause and the button background will change to a different xml drawable layout that says Music Off. When it is clicked again the music will resume where it left off and again switch back to Music On.
One problem I am having is pausing the main sound. Since I'm new to android can a media player variable I reference in my main activity be changed in a different activity? Also, in my options activity I have two if statements under the on click for the image button to check whether the sound is playing or isn't and then will either pause or resume the music depending on which one it is. I am not sure how to do the second if statement but I have the first one that I think might be right.
Sorry that there are a lot of different things I am trying to do, but I tried to break it down. Also, I am getting force closes as of now when I start the optionsActivity and I will put everything underneath including the main activity because that is where I establish the mainSound. Thanks for any help you can give me.
MainActivity:
package com.crazycastles;
import android.app.Activity;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ImageButton;
public class MainActivity extends Activity implements OnClickListener {
/** Called when the activity is first created. */
private MediaPlayer mainSound;
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) { if ((keyCode == KeyEvent.KEYCODE_BACK)) { //Back key pressed //Things to Do
if(mainSound!= null) { mainSound.pause(); mainSound=null; } finish(); return true; } return super.onKeyDown(keyCode, event); }
public void onCreate(Bundle savedInstanceState) {
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mainSound = MediaPlayer.create(MainActivity.this, R.raw.mainscreen);
mainSound.setLooping(true);
mainSound.start();
//CREATE BUTTON 1 & SOUND
final MediaPlayer buttonSound = MediaPlayer.create(
MainActivity.this, R.raw.swords);
ImageButton button1 = (ImageButton) findViewById(R.id.button1);
button1.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
buttonSound.start();
startActivity(new Intent(MainActivity.this,
button1Activity.class));
}
});
ImageButton multiplayerbutton = (ImageButton) findViewById(R.id.multiplayerbutton);
multiplayerbutton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
buttonSound.start();
startActivity(new Intent(MainActivity.this,
multiplayerbuttonActivity.class));
}
});
ImageButton optionsbutton = (ImageButton) findViewById(R.id.optionsbutton);
optionsbutton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
buttonSound.start();
startActivity(new Intent(MainActivity.this,
optionsActivity.class));
}
});
ImageButton creditbutton = (ImageButton) findViewById(R.id.creditbutton);
creditbutton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
buttonSound.start();
startActivity(new Intent(MainActivity.this,
creditsActivity.class));
}
});
ImageButton exitbutton = (ImageButton) findViewById(R.id.exitbutton);
exitbutton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
buttonSound.start();
finish();
mainSound.stop();
System.exit(0);
}
});
//END OF BUTTON1 & SOUND
}
public void onClick(View v) {
// TODO Auto-generated method stub
}
}
optionsActivity:
package com.crazycastles;
import android.app.Activity;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ImageButton;
public class optionsActivity extends Activity {
/** Called when the activity is first created. */
ImageButton musicbutton, musicbutton2;
private MediaPlayer mainSound;
final MediaPlayer buttonSound = MediaPlayer.create(
optionsActivity.this, R.raw.swords);
#Override
public void onCreate(Bundle savedInstanceState) {
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
super.onCreate(savedInstanceState);
setContentView(R.layout.options);
final ImageButton musicbutton = (ImageButton) findViewById(R.id.musicbutton);
musicbutton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
if(mainSound.isPlaying()) {
musicbutton.setBackgroundResource(R.drawable.musicbutton2);
buttonSound.start();
mainSound.pause();
}
}
});
}
}
LogCat:
01-15 16:10:55.059: E/AndroidRuntime(7319): FATAL EXCEPTION: main
01-15 16:10:55.059: E/AndroidRuntime(7319): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.crazycastles/com.crazycastles.optionsActivity}: java.lang.NullPointerException
01-15 16:10:55.059: E/AndroidRuntime(7319): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2659)
01-15 16:10:55.059: E/AndroidRuntime(7319): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2753)
01-15 16:10:55.059: E/AndroidRuntime(7319): at android.app.ActivityThread.access$2500(ActivityThread.java:129)
01-15 16:10:55.059: E/AndroidRuntime(7319): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2107)
01-15 16:10:55.059: E/AndroidRuntime(7319): at android.os.Handler.dispatchMessage(Handler.java:99)
01-15 16:10:55.059: E/AndroidRuntime(7319): at android.os.Looper.loop(Looper.java:143)
01-15 16:10:55.059: E/AndroidRuntime(7319): at android.app.ActivityThread.main(ActivityThread.java:4701)
01-15 16:10:55.059: E/AndroidRuntime(7319): at java.lang.reflect.Method.invokeNative(Native Method)
01-15 16:10:55.059: E/AndroidRuntime(7319): at java.lang.reflect.Method.invoke(Method.java:521)
01-15 16:10:55.059: E/AndroidRuntime(7319): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
01-15 16:10:55.059: E/AndroidRuntime(7319): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
01-15 16:10:55.059: E/AndroidRuntime(7319): at dalvik.system.NativeStart.main(Native Method)
01-15 16:10:55.059: E/AndroidRuntime(7319): Caused by: java.lang.NullPointerException
01-15 16:10:55.059: E/AndroidRuntime(7319): at android.content.ContextWrapper.getResources(ContextWrapper.java:80)
01-15 16:10:55.059: E/AndroidRuntime(7319): at android.media.MediaPlayer.create(MediaPlayer.java:641)
01-15 16:10:55.059: E/AndroidRuntime(7319): at com.crazycastles.optionsActivity.<init>(optionsActivity.java:17)
01-15 16:10:55.059: E/AndroidRuntime(7319): at java.lang.Class.newInstanceImpl(Native Method)
01-15 16:10:55.059: E/AndroidRuntime(7319): at java.lang.Class.newInstance(Class.java:1429)
01-15 16:10:55.059: E/AndroidRuntime(7319): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
01-15 16:10:55.059: E/AndroidRuntime(7319): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2651)

I also have developed a music player in Android
One problem I am having is pausing the main sound. Since I'm new to
android can a media player variable I reference in my main activity be
changed in a different activity?
I could say it yes, if you declare it as a static Object
Also, in my options activity I have two if statements under the on
click for the image button to check whether the sound is playing or
isn't and then will either pause or resume the music depending on
which one it is. I am not sure how to do the second if statement but I
have the first one that I think might be right.
I think you have to look at Android Media Player lifecycle, you could re-use your object but there is some conditions : http://developer.android.com/reference/android/media/MediaPlayer.html

Since I'm new to android can a media player variable I reference in my main activity be changed in a different activity?
No. If you create a MediaPlayer in an activity, it should only be used while that activity is in the foreground. Your MediaPlayer most likely should be managed by a Service, if you are planning on it continuing to play once the user has left the activity.

how to show popup window in my main window?

hi friends i download one popup window sample source code...its working fine...when i run this application emulator screen display one button, if i click that button popup window shown in bottom.if i click again same button its dismiss the popup window...but,
i expect when my application open i need static popup window, no need this button. then i click softkey board(computer keyboard)f2 button, the popup window i want to dismiss...thats all if anyone know please help me......
This is my source code:
package popupTest.popupTest;
import android.R.layout;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.PopupWindow;
import android.widget.TextView;
public class popupTest extends Activity {
PopupWindow popUp;
LinearLayout layout;
TextView tv;
LayoutParams params;
LinearLayout mainLayout;
Button but;
boolean click = true;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
popUp = new PopupWindow(this);
layout = new LinearLayout(this);
mainLayout = new LinearLayout(this);
tv = new TextView(this);
but = new Button(this);
but.setText("Click Me");
but.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if (click) {
popUp.showAtLocation(layout, Gravity.BOTTOM, 10, 10);
popUp.update(50, 50, 300, 80);
click = false;
} else {
popUp.dismiss();
click = true;
}
}
});
params = new LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT);
layout.setOrientation(LinearLayout.VERTICAL);
tv.setText("Hi this is a sample text for popup window");
layout.addView(tv, params);
popUp.setContentView(layout);
// popUp.showAtLocation(layout, Gravity.BOTTOM, 10, 10);
mainLayout.addView(but, params);
setContentView(mainLayout);
}
}
logcat error:
08-23 16:38:23.771: ERROR/AndroidRuntime(433): FATAL EXCEPTION: main
08-23 16:38:23.771: ERROR/AndroidRuntime(433): java.lang.RuntimeException: Unable to start activity ComponentInfo{popupTest.popupTest/popupTest.popupTest.popupTest}: android.view.WindowManager$BadTokenException: Unable to add window -- token null is not valid; is your activity running?
08-23 16:38:23.771: ERROR/AndroidRuntime(433): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
08-23 16:38:23.771: ERROR/AndroidRuntime(433): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
08-23 16:38:23.771: ERROR/AndroidRuntime(433): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
08-23 16:38:23.771: ERROR/AndroidRuntime(433): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
08-23 16:38:23.771: ERROR/AndroidRuntime(433): at android.os.Handler.dispatchMessage(Handler.java:99)
08-23 16:38:23.771: ERROR/AndroidRuntime(433): at android.os.Looper.loop(Looper.java:123)
08-23 16:38:23.771: ERROR/AndroidRuntime(433): at android.app.ActivityThread.main(ActivityThread.java:4627)
08-23 16:38:23.771: ERROR/AndroidRuntime(433): at java.lang.reflect.Method.invokeNative(Native Method)
08-23 16:38:23.771: ERROR/AndroidRuntime(433): at java.lang.reflect.Method.invoke(Method.java:521)
08-23 16:38:23.771: ERROR/AndroidRuntime(433): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
08-23 16:38:23.771: ERROR/AndroidRuntime(433): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
08-23 16:38:23.771: ERROR/AndroidRuntime(433): at dalvik.system.NativeStart.main(Native Method)
08-23 16:38:23.771: ERROR/AndroidRuntime(433): Caused by: android.view.WindowManager$BadTokenException: Unable to add window -- token null is not valid; is your activity running?
08-23 16:38:23.771: ERROR/AndroidRuntime(433): at android.view.ViewRoot.setView(ViewRoot.java:505)
08-23 16:38:23.771: ERROR/AndroidRuntime(433): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:177)
08-23 16:38:23.771: ERROR/AndroidRuntime(433): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
08-23 16:38:23.771: ERROR/AndroidRuntime(433): at android.view.Window$LocalWindowManager.addView(Window.java:424)
08-23 16:38:23.771: ERROR/AndroidRuntime(433): at android.widget.PopupWindow.invokePopup(PopupWindow.java:828)
08-23 16:38:23.771: ERROR/AndroidRuntime(433): at android.widget.PopupWindow.showAtLocation(PopupWindow.java:688)
08-23 16:38:23.771: ERROR/AndroidRuntime(433): at popupTest.popupTest.popupTest.onCreate(popupTest.java:49)
08-23 16:38:23.771: ERROR/AndroidRuntime(433): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
08-23 16:38:23.771: ERROR/AndroidRuntime(433): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
08-23 16:38:23.771: ERROR/AndroidRuntime(433): ... 11 more
08-23 16:38:23.820: WARN/ActivityManager(59): Force finishing activity popupTest.popupTest/.popupTest

put the code outside onClick in onCreate ....and use setOnclickListener to remove ur popup..

I have edited your code and it will show the pop up on the start of the activity:
package popupTest.popupTest;
import android.R.layout;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.PopupWindow;
import android.widget.TextView;
public class popupTest extends Activity {
PopupWindow popUp;
LinearLayout layout;
TextView tv;
LayoutParams params;
LinearLayout mainLayout;
Button but;
boolean click = true;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
popUp = new PopupWindow(this);
layout = new LinearLayout(this);
mainLayout = new LinearLayout(this);
tv = new TextView(this);
but = new Button(this);
but.setText("Click Me");
params = new LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT);
layout.setOrientation(LinearLayout.VERTICAL);
tv.setText("Hi this is a sample text for popup window");
layout.addView(tv, params);
popUp.setContentView(layout);
// popUp.showAtLocation(layout, Gravity.BOTTOM, 10, 10);
mainLayout.addView(but, params);
setContentView(mainLayout);
Handler handler = new Handler();
handler.postDelayed(new Runnable(){
public void run() {
// TODO Auto-generated method stub
popUp.showAtLocation(layout, Gravity.BOTTOM, 10, 10);
popUp.update(50, 50, 300, 80);
}
}, 1000);
//Use this to dismiss as per your need...
// popUp.dismiss();
}
#Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
popUp.dismiss();
return false;
}
}