How Can I Resolve "cannot Find Symbol ... " In Android Studio

I'm trying to learn android on android developer website. However I encounter an error when following their lecture. It seems that the findViewByID cannot resolve R.id.editText des

Solution 1:

Just do one thing , remove this from sendMessage function and

EditTexteditText= (EditText) findViewById(R.id.editText);

place this line right below setContentView(R.____); I guess , this will solve your problem

Solution 2:

It seems that the findViewByID cannot resolve R.id.editText

You are probably missing to define EditText id as editText.

 <EditText
       .....
        android:id="@+id/editText"
          .....
   />

YourCurrentActivity.java

@Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
      ......
 }