多个edittext共同使用一个TextWatcher_多个edittext设置textwatcher-优快云博客

本文介绍了一个应用注册界面的具体实现过程，包括界面布局设置、组件初始化及交互逻辑处理等内容。重点讲解了如何通过监听输入框的文字变化来改变按钮状态，确保用户输入有效信息。

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@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.app_register);

tvTimeToReget=(TextView)findViewById(R.id.appr_textview_time_to_reget);
btnReget=(Button)findViewById(R.id.appr_btn_reget);
btnReget.setOnClickListener(this);

btnTitleBack=(Button)findViewById(R.id.app_title_btn_left);
btnTitleBack.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sendEmptyMessage(2);
}
});
setCurrRegisterView(STATUS_NUM_MODULE);

etMobileNum =(EditText)findViewById(R.id.appr_edittext_mobile_num);
etMobileNum.addTextChangedListener(new CustomTextWatcher(etMobileNum));

etVerifyCode=(EditText)findViewById(R.id.appr_edittext_verify_code);
etVerifyCode.addTextChangedListener(new CustomTextWatcher(etVerifyCode));

etPassword=(EditText)findViewById(R.id.appr_edittext_password);
etRePassword=(EditText)findViewById(R.id.appr_edittext_rePassword);
}

private class CustomTextWatcher implements TextWatcher {
private EditText mEditText;
private CharSequence mCharSequence;
public CustomTextWatcher(EditText e) {
mEditText = e;
}

public void beforeTextChanged(CharSequence s, int start, int count, int after) {
mCharSequence = s;
}

public void onTextChanged(CharSequence s, int start, int before, int count) {

}

public void afterTextChanged(Editable s) {
if (mCharSequence.length() ==1) {
btnRegisterNextStep.setBackgroundResource(R.drawable.register_button_selector);

}else if(mCharSequence.length()<1) {
btnRegisterNextStep.setBackgroundResource(R.drawable.register_button_not_available);
}
}
}