private EditText edittextcll;// 输入框
edittextcll = (EditText) findViewById(R.id.edittextcll);
//监听输入框禁止输入空格
edittextcll.addTextChangedListener(new TextWatcher() {
 @Override
 public void onTextChanged(CharSequence s, int start, int before,
        int count) {
  if (s.toString().contains(" ")) {
   String[] str = s.toString().split(" ");
   String str1 = "";
   for (int i = 0; i < str.length; i++) {
    str1 += str[i];
   }
   edittextcll.setText(str1);
   edittextcll.setSelection(start);
  }
 }
 @Override
 public void beforeTextChanged(CharSequence s, int start, int count,
         int after) {
 }
 @Override
 public void afterTextChanged(Editable s) {
 }
});

<EditText
 android:id="@+id/edittextcll"
 android:layout_width="fill_parent"
 android:layout_height="fill_parent"
 android:layout_marginLeft="5dp"
 android:layout_marginRight="5dp"
 android:background="@null"
 android:gravity="top"
 android:hint="输入更多补充意见"
 android:singleLine="true"
 android:textColor="#262626"
 android:textSize="16dp" />