demo05

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical"

    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/msg"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="please input userpassword:"
        />
     <EditText
         android:id="@+id/password"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         />
    <CheckBox
        android:id="@+id/show"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:checked="false"
        android:text="show Password"
        />

     <TextView
         android:id="@+id/xinbei"
         android:text="你的性别是:"
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:textSize="20px"/>

</LinearLayout>
===========================

package com.example.chapter06passwordrediogroup;

import android.os.Bundle;
import android.app.Activity;
import android.text.method.HideReturnsTransformationMethod;
import android.text.method.PasswordTransformationMethod;
import android.view.Menu;
import android.view.View;
import android.widget.CheckBox;
import android.widget.EditText;

public class MainActivity extends Activity {

    private EditText password=null;
    private CheckBox show =null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

       this.password= (EditText)super.findViewById(R.id.password);
       this.show = (CheckBox)super.findViewById(R.id.show);
       this.show.setOnClickListener(new View.OnClickListener() {
           @Override
           public void onClick(View view) {
               if (show.isChecked()){
                   MainActivity.this.password.setTransformationMethod(HideReturnsTransformationMethod.getInstance());
               }else{
                   MainActivity.this.password.setTransformationMethod(PasswordTransformationMethod.getInstance());
               }
           }
       });

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}