如何在AutoCompleteTextView中删除空白

Question

How can I remove the white space that automatically typed together with the letter(s) in my autocompletetextview whenever I click my imagebutton(s)? and how can I make my imagebuttons' picture back to the first image (because here when the imagebutton is clicked the color of the image change and I want it to set back its original image after clicking a button) for example here using mycodes: from a to changea and back to a. Heres my code:

 public void onClick(View arg0) { Log.i(TAG,"arg0.getId()="+arg0.getId()); if (arg0.getId()==R.drawable.a){ Log.i(TAG,"arg0.getId()="+arg0.getId()); generatedString=generatedString+("a"); text.setText(generatedString); ((ImageButton) arg0).setImageResource(R.drawable.changea); 

Answer 1

a) To remove whitespace in a String use the method trim()

b) to change the image located into your resources of an ImageView use the method setImageResource() this is an example:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center">

    <Button
        android:id="@+id/button1"
        android:layout_width="120dp"
        android:layout_height="120dp"/>

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/cat" />

</LinearLayout>

Heres the code to change from an image "cat" to "dog".

Button btn;
ImageView img;
boolean click ;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    btn = (Button) findViewById(R.id.button1);
    btn.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            img = (ImageView)findViewById(R.id.imageView1); 
            if(click){                      
                img.setImageResource(R.drawable.cat);
                click = false;
            }else{
                img.setImageResource(R.drawable.dog);
                click = true;
            }

        }
    });
}