I am working on a contact list project and the last thing i need to do is display images for each of my contact.
In code from below i want to show my image by using the path wich is saved in my edittext1:
but i get NUll pointer exception on this line:
String username = mpic.getText().toString();
private void ShowImage()
{
//string username created from edit text field to a string
EditText mpic =(EditText)findViewById(R.id.edittext1);
String username = mpic.getText().toString();
//bitmap will decode the string to a image (bitmap)
Bitmap myBitmap = BitmapFactory.decodeFile(username);
//Image view used to set the bitmap
ImageView myImage = (ImageView) findViewById(R.id.image);
//setting the image to the image view
myImage.setImageBitmap(myBitmap);
}
The whole class is :
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ShowImage();
showDatabaseContent();
lv1 = getListView();
lv1.setTextFilterEnabled(true);
lv1.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> a, View v, int position, long id) {
cursor = (Cursor) a.getItemAtPosition(position);
itemId = cursor.getString(6);
openOptionsMenu();
}
});
lv1.setOnItemSelectedListener(new OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> parent, View view, int position, long id){
}
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}
});
}
//selected item index from ListView
public void showDialogItemId(long itemId){
Toast.makeText(this, "Menu item selected index is" + Long.toString(itemId), Toast.LENGTH_LONG).show();
}
@Override
public boolean onCreateOptionsMenu(Menu menu){
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item){
switch (item.getItemId()){
case R.id.modifyitem:
if(null != itemId){
Bundle contactToModify = new Bundle();
contactToModify.putString("cFirstName", cursor.getString(0));
contactToModify.putString("cMobilePhone", cursor.getString(5));
contactToModify.putString("cEmail", cursor.getString(2));
contactToModify.putString("curl", cursor.getString(3));
contactToModify.putString("cAdress", cursor.getString(4));
contactToModify.putString ("cphoto", cursor.getString(1));
contactToModify.putString("mod_type", "modifyPerson");
Intent intent = new Intent(this, ContactDetails.class);
intent.setClass(this, ContactDetails.class);
intent.putExtras(contactToModify);
startActivityForResult(intent, CONTACT_MODIFIED);
}else{
Toast.makeText(this, "Select Contact to modify", Toast.LENGTH_LONG).show();
}
break;
case R.id.additem:
Intent i = new Intent(this, ContactDetails.class);
Bundle bun = new Bundle();
bun.putString("mod_type", "addPerson");
i.setClass(this, ContactDetails.class);
i.putExtras(bun);
startActivityForResult(i, CONTACT_ADDED);
break;
case R.id.removeitem:
if(null != itemId){
removeContact(itemId);
showDatabaseContent();
}
else{
Toast.makeText(this, "Select Contact to delete", Toast.LENGTH_LONG).show();
}
break;
case R.id.search:
Intent j =new Intent(this,Search.class);
j.setClass(this, Search.class);
startActivity(j);
break;
}
return true;
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent){
// See which child activity is calling us back.
switch (resultCode) {
case CONTACT_ADDED:
// This is the standard resultCode that is sent back if the
// activity crashed or didn't doesn't supply an explicit result.
if (resultCode == RESULT_FIRST_USER){
Bundle bundle = new Bundle();
bundle = intent.getBundleExtra("contactData");
addContact(bundle);
showDatabaseContent();
}
else{
Toast.makeText(this, "CANCEL CONTACT BUTTON PRESSED", Toast.LENGTH_LONG).show();
}
break;
case CONTACT_MODIFIED:
if (resultCode == 2){
Bundle bundle = new Bundle();
bundle = intent.getBundleExtra("contactData");
modifyContact(bundle);
showDatabaseContent();
}
else{
Toast.makeText(this, "MODIFY CONTACT FAILED", Toast.LENGTH_LONG).show();
}
break;
default:
break;
}
}
//method removes item from database
private void removeContact(String itemId){
db = contacts.getWritableDatabase();
db.delete(DbConstants.TABLE_NAME, "_ID=" + itemId, null);
}
private void addContact(Bundle bundle) {
// Insert a new record into the Events data source.
// You would do something similar for delete and update.
db = contacts.getWritableDatabase();
ContentValues vals = new ContentValues();
vals.put(DbConstants.NAME, bundle.getString("contactFirstName"));
vals.put(DbConstants.PHONE, bundle.getString("contactMobilePhone"));
vals.put(DbConstants.EMAIL, bundle.getString("contactEmail"));
vals.put(DbConstants.URL_STRING,bundle.getString("contactUrl"));
vals.put(DbConstants.ADRESS,bundle.getString("contactadress"));
vals.put(DbConstants.PHOTO,bundle.getString("contactphoto"));
db.insertOrThrow(DbConstants.TABLE_NAME, null, vals);
}
//method should modify existing Contact
private void modifyContact(Bundle bundle){
db = contacts.getWritableDatabase();
ContentValues vals = new ContentValues();
vals.put(DbConstants.NAME, bundle.getString("contactFirstName"));
vals.put(DbConstants.PHONE, bundle.getString("contactMobilePhone"));
vals.put(DbConstants.EMAIL, bundle.getString("contactEmail"));
vals.put(DbConstants.URL_STRING,bundle.getString("contactUrl"));
vals.put(DbConstants.ADRESS,bundle.getString("contactadress"));
vals.put(DbConstants.PHOTO,bundle.getString("contactphoto"));
db.update(DbConstants.TABLE_NAME, vals, _ID+"="+itemId, null);
}
private Cursor getContacts() {
db = contacts.getReadableDatabase();
cursor = db.query(DbConstants.TABLE_NAME, FROM, null, null, null,
null, null);
startManagingCursor(cursor);
return cursor;
}
public void showDatabaseContent(){
contacts = new DbCreate(this);
try {
cursor = getContacts();
showContacts(cursor);
} finally {
contacts.close();
db.close();
}
}
private void showContacts(Cursor cursor) {
//set up data binding
SimpleCursorAdapter adapter = new SimpleCursorAdapter(this, R.layout.item, cursor, FROM, TO);
setListAdapter(adapter);
}
private void ShowImage()
{
//string username created from edit text field to a string
EditText mpic =(EditText)findViewById(R.id.edittext1);
String username = mpic.getText().toString();
//bitmap will decode the string to a image (bitmap)
Bitmap myBitmap = BitmapFactory.decodeFile(username);
//Image view used to set the bitmap
ImageView myImage = (ImageView) findViewById(R.id.image);
//setting the image to the image view
myImage.setImageBitmap(myBitmap);
}
Whole error:
12-30 20:33:23.292: E/AndroidRuntime(4297): FATAL EXCEPTION: main
12-30 20:33:23.292: E/AndroidRuntime(4297): java.lang.RuntimeException: Unable to start activity ComponentInfo{org.example.dbcontactconsole/org.example.dbcontactconsole.DbContactConsole}: java.lang.NullPointerException
12-30 20:33:23.292: E/AndroidRuntime(4297): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
12-30 20:33:23.292: E/AndroidRuntime(4297): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
12-30 20:33:23.292: E/AndroidRuntime(4297): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
12-30 20:33:23.292: E/AndroidRuntime(4297): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
12-30 20:33:23.292: E/AndroidRuntime(4297): at android.os.Handler.dispatchMessage(Handler.java:99)
12-30 20:33:23.292: E/AndroidRuntime(4297): at android.os.Looper.loop(Looper.java:123)
12-30 20:33:23.292: E/AndroidRuntime(4297): at android.app.ActivityThread.main(ActivityThread.java:4627)
12-30 20:33:23.292: E/AndroidRuntime(4297): at java.lang.reflect.Method.invokeNative(Native Method)
12-30 20:33:23.292: E/AndroidRuntime(4297): at java.lang.reflect.Method.invoke(Method.java:521)
12-30 20:33:23.292: E/AndroidRuntime(4297): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
12-30 20:33:23.292: E/AndroidRuntime(4297): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
12-30 20:33:23.292: E/AndroidRuntime(4297): at dalvik.system.NativeStart.main(Native Method)
12-30 20:33:23.292: E/AndroidRuntime(4297): Caused by: java.lang.NullPointerException
12-30 20:33:23.292: E/AndroidRuntime(4297): at org.example.dbcontactconsole.DbContactConsole.ShowImage(DbContactConsole.java:234)
12-30 20:33:23.292: E/AndroidRuntime(4297): at org.example.dbcontactconsole.DbContactConsole.onCreate(DbContactConsole.java:46)
12-30 20:33:23.292: E/AndroidRuntime(4297): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
12-30 20:33:23.292: E/AndroidRuntime(4297): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
12-30 20:33:23.292: E/AndroidRuntime(4297): ... 11 more
