Android EditText密码的隐藏和显示功能

      dt1=(EditText)findViewById(R.id.password);   cb1=(CheckBox)findViewById(R.id.checkbox_1); cb1.setOnCheckedChangeListener(new OnCheckedChangeListener() {      @Override   public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {     // TODO Auto-generated method stub     if(cb1.isChecked()){              dt1.setTransformationMethod(HideReturnsTransformationMethod.getInstance()); //如果被选中则显示密码       dt1.setSelection(dt1.getText().length());   //TextView默认光标在最左端，这里控制光标在最右端            }else {              dt1.setTransformationMethod(PasswordTransformationMethod.getInstance()); //如果没选中CheckBox则隐藏密码     dt1.setSelection(dt1.getText().length());   } } );