android EditText随着输入直接显示输入的内容



使用TextWatcher类，这种方式是可以监听软键盘和硬键盘的，我们只需要实现onTextChanged方法即可

    final TextView tv = (TextView) findViewById(R.id.aimi);
        final EditText tx = (EditText) findViewById(R.id.editText1);
        tx.addTextChangedListener(new TextWatcher() {
   
   @Override
   public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {
    tv.setText(tx.getText());
    
   }
   
   @Override
   public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
     int arg3) {
    // TODO Auto-generated method stub
    
   }
   
   @Override
   public void afterTextChanged(Editable arg0) {
    // TODO Auto-generated method stub
    
   }
  });