Trouble sending stuff from an EditText to another activity using intents

问题

I am having some trouble getting the data from my edit text into an share intent extra.For some reason , it is returning an empty string even when the EditText field has been filled. I Know there are several similar threads about people having trouble getting data out of an edit text field but I cant seem to adapt those answers to my code.

I have attached the relevant bits of code .Do let me know if you need to see any more of the code.(the bits of code I am having trouble with is in the private Intent createShareIntent().It is the third method in the attached code below)

   public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    mDbHelper = new NotesDbAdapter(this);
    mDbHelper.open();

    setContentView(R.layout.note_edit);//Set the layout file 
    setTitle(R.string.edit_note);//Set the title to be displayed in the action bar


    mTitleText = (EditText) findViewById(R.id.title);
    mBodyText = (EditText) findViewById(R.id.body);

   //get the row id of the note in the database form the intent .
    mRowId = (savedInstanceState == null) ? null :
        (Long) savedInstanceState.getSerializable(NotesDbAdapter.KEY_ROWID);
    if (mRowId == null) {
        Bundle extras = getIntent().getExtras();
        mRowId = extras != null ? extras.getLong(NotesDbAdapter.KEY_ROWID)
                                : null;
    }

    populateFields();

}
//THis method is used to create the menu in the Action bar
@Override//This works perfectly fine
public boolean onCreateOptionsMenu(Menu menu) {

    getSupportMenuInflater().inflate(R.menu.main, menu);//inflating the menu layout
    MenuItem actionItem = menu.findItem(R.id.menu_share);//The share button in handled here
    //The share action provider  
    ShareActionProvider actionProvider = (ShareActionProvider) actionItem.getActionProvider();
    actionProvider.setShareHistoryFileName(null);
    actionProvider.setShareIntent(createShareIntent());//creating a share intent
    return true;//return true if the menu creation has been successful 
}

//Handles the share intent
private Intent createShareIntent() {//this is where the trouble is
    saveState();
    String body = mBodyText.getText().toString();//this returnes an empty string 
    String title = mTitleText.getText().toString();// this returnes an empty string
    Intent shareIntent = new Intent(Intent.ACTION_SEND);//Setting the action to ACTION_SEND
    shareIntent.setType("text/plain");//setting the text type to plain text
    shareIntent.putExtra(Intent.EXTRA_TEXT,body);//this sends an empty string
    shareIntent.putExtra(Intent.EXTRA_SUBJECT,title);//this sends an empty string
    return shareIntent;
}

My questions are: 1. Why am I getting an empty string from the edittext even when it is filled? 2.How do I fix it ?

Thanks for taking the time to read this and for any help that you can give.

回答1:

It is returning empty text because putExtra is called inside onCreateOptionsMenu and at the begining (when the option menu is being created) your EditText is empty. You can add TextChangedListener to your edit text and update your share intent whenever EditText changes.

et.addTextChangedListener(new TextWatcher() {

    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {
        // Update your intent here.
    }
});

来源：https://stackoverflow.com/questions/17835178/trouble-sending-stuff-from-an-edittext-to-another-activity-using-intents