Android：密码显示隐藏

效果：

<?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());

                }

                

            }

        });

    }



}

关键是：

editText1.setTransformationMethod(HideReturnsTransformationMethod.getInstance());

editText1.setTransformationMethod(PasswordTransformationMethod.getInstance());