EdittextActivity.class
package com.xdw.a122; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.text.Editable; import android.text.TextWatcher; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; public class EdittextActivity extends AppCompatActivity { private Button mBtnLogin; private EditText mEtUserName; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_edittext); mBtnLogin=findViewById(R.id.btn_login); mBtnLogin.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Toast.makeText(EdittextActivity.this,"登陆成功!",Toast.LENGTH_LONG).show(); } }); mEtUserName=findViewById(R.id.et_1); mEtUserName.addTextChangedListener(new TextWatcher() { @Override public void beforeTextChanged(CharSequence s, int start, int count, int after) { }//文字改变之前 @Override public void onTextChanged(CharSequence s, int start, int before, int count) { Log.d("edittext",s.toString()); }//文字改变中 @Override public void afterTextChanged(Editable s) { }//文字改变之后 }); } }
activity_edittext.xml
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".EdittextActivity"> <EditText android:id="@+id/et_1" android:layout_width="match_parent" android:layout_height="50dp" android:layout_alignParentStart="true" android:layout_alignParentTop="true" android:layout_marginStart="0dp" android:layout_marginTop="10dp" android:background="@drawable/bg_username" android:drawableLeft="@drawable/user1" android:hint=" 用户名" android:inputType="text" android:maxLines="1" android:paddingLeft="10dp" android:paddingRight="10dp" android:textColor="#FFAD33" android:textSize="16sp" /> <EditText android:id="@+id/et_2" android:layout_width="match_parent" android:layout_height="50dp" android:textSize="16sp" android:textColor="#FFAD33" android:drawableLeft="@drawable/pass1" android:hint=" 密码" android:inputType="textPassword" android:background="@drawable/bg_username" android:layout_below="@+id/et_1" android:layout_marginTop="15dp" android:paddingLeft="10dp" android:paddingRight="10dp"/> <Button android:id="@+id/btn_login" android:layout_width="match_parent" android:layout_height="40dp" android:layout_marginTop="40dp" android:layout_below="@id/et_2" android:background="@drawable/bg_btn3" android:text="登陆" android:textColor="#fff" android:textSize="20sp"/></RelativeLayout>
我学习的:
private Button mBtnLogin; mBtnLogin=findViewById(R.id.btn_login); mBtnLogin.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Toast.makeText(EdittextActivity.this,"登陆成功!",Toast.LENGTH_LONG).show(); } });
点击事件显示三秒登陆成功 android:hint=" 用户名" //文本显示 android:inputType="text" //文本类型 android:maxLines="1" //最大行数
android:drawableLeft="@drawable/pass1"//显示图片(在左侧) 结果
原文地址:https://www.cnblogs.com/zlc364624/p/10704925.html
时间: 2024-08-02 03:41:05