ch02 Android TextView与EditView

--------------------------------------------strings.xml--------------------------------------------

<resources>    <string name="app_name">com.ch02</string>    <string name="hello_world">Hello world!</string>    <string name="menu_settings">Settings</string>    <string name="title_activity_main">com.ch02</string><string name="uname">用户名</string><string name="upass">密码</string></resources>

--------------------------------------------activity_main.xml------------------------------------

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/LinearLayout1"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <TextView        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="@string/uname" />    <EditText        android:id="@+id/uname"        android:layout_width="fill_parent"        android:layout_height="wrap_content" />    <TextView        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="@string/upass" />    <EditText        android:id="@+id/upass"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:inputType="textPassword" />    <TextView        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="显示密码" />    <CheckBox        android:id="@+id/show"        android:layout_width="fill_parent"        android:layout_height="wrap_content" />    <Button        android:id="@+id/btn"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="登录" /></LinearLayout>

--------------------------------------------MainActivity-------------------------------------------

package com.ch02;import com.ch02.R;import android.app.Activity;import android.os.Bundle;import android.text.method.HideReturnsTransformationMethod;import android.text.method.PasswordTransformationMethod;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.CheckBox;import android.widget.CompoundButton;import android.widget.CompoundButton.OnCheckedChangeListener;import android.widget.EditText;import android.widget.Toast;/** *  * 项目名称：com.ch02  * 类名称：MainActivity     * 类描述： 用户登录验证 * 创建人：fy    * 创建时间：2012-11-2 上午9:36:10    * Copyright (c) 方勇-版权所有 */public class MainActivity extends Activity {/* 用户名 */private EditText field_uname;/* 密码 */private EditText field_upass;/* 登录按钮 */private Button btn_login;/* 密码显示与隐藏开关 */private CheckBox check_show;private boolean mbDisplayFlg = false;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);findViews();setListeners();}/* 初始化UI控件 */private void findViews() {field_uname = (EditText) findViewById(R.id.uname);field_upass = (EditText) findViewById(R.id.upass);btn_login = (Button) findViewById(R.id.btn);check_show = (CheckBox) findViewById(R.id.show);}/* 设置监听器 */private void setListeners() {btn_login.setOnClickListener(onClickListener);check_show.setOnCheckedChangeListener(onCheckedChangeListener);}/* 复选按钮事件，密码显示与隐藏开关 */private OnCheckedChangeListener onCheckedChangeListener = new OnCheckedChangeListener() {@Overridepublic void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {if (!mbDisplayFlg) {// display password text, for example "123456"field_upass.setTransformationMethod(HideReturnsTransformationMethod.getInstance());} else {// hide password, display "."field_upass.setTransformationMethod(PasswordTransformationMethod.getInstance());}mbDisplayFlg = !mbDisplayFlg;field_upass.postInvalidate();}};/* 监听器 变量 */private OnClickListener onClickListener = new OnClickListener() {public void onClick(View v) {Toast.makeText(MainActivity.this, field_uname.getText().toString(), Toast.LENGTH_SHORT).show();}};}

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