EditText(7)EditText输入事件监听

EditText.addTextChangedListener(TextWatcher watcher);

 void initSearch(){
         search = (EditText) findViewById(R.id.search);

         search.setOnEditorActionListener(new EditText.OnEditorActionListener(){

             @Override
             public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {

                 if (actionId == EditorInfo.IME_ACTION_SEND){
                     Snackbar snackbar = Snackbar.make(v, "虽然是search，但是是actionSend", Snackbar.LENGTH_SHORT);
                     snackbar.show();
                     return true;
                 }
                 return false;
             }
         });

         search.addTextChangedListener(new TextWatcher() {
             @Override
             public void beforeTextChanged(CharSequence s, int start, int count, int after) {
                 System.out.println("beforeTextChanged :" + s);
             }

             @Override
             public void onTextChanged(CharSequence s, int start, int before, int count) {
                 System.out.println("onTextChanged :" + s);
                 actionBar.setTitle(s);

             }

             @Override
             public void afterTextChanged(Editable s) {
                 System.out.println("afterTextChanged :" + s);
             }
         });

     }