<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <EditText        android:id="@+id/editText1"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:ems="10"        android:inputType="textPassword" >        <requestFocus />    </EditText>    <CheckBox        android:id="@+id/checkBox1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="显示密码" /></LinearLayout>

package com.example.test;import android.app.Activity;import android.os.Bundle;import android.text.method.HideReturnsTransformationMethod;import android.text.method.PasswordTransformationMethod;import android.widget.CheckBox;import android.widget.CompoundButton;import android.widget.CompoundButton.OnCheckedChangeListener;import android.widget.TextView;public class MainActivity extends Activity {private TextView editText1;private CheckBox checkBox1;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.test);                editText1 =(TextView) findViewById(R.id.editText1);        checkBox1=(CheckBox) findViewById(R.id.checkBox1);        checkBox1.setOnCheckedChangeListener(new OnCheckedChangeListener() {                        @Override            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {                // TODO Auto-generated method stub                if(isChecked){                    //如果选中，显示密码                          editText1.setTransformationMethod(HideReturnsTransformationMethod.getInstance());                }else{                    //否则隐藏密码                    editText1.setTransformationMethod(PasswordTransformationMethod.getInstance());                }                            }        });    }}