EditText 显示or不显示 输入密码

####1、效果展示

#####2、layout布局文件

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical"
    tools:context="com.example.menglu.myapplicationwifipassed.MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="100dp"
        android:orientation="horizontal">

        <ImageView
            android:layout_width="30dp"
            android:layout_height="30dp"
            android:layout_gravity="center"
            android:src="@drawable/wifi_lock_icon"
            android:background="#ff3799f4"/>

        <EditText
            android:id="@+id/set_wifi_password_id"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:maxLines="1"
            android:layout_gravity="center"
            android:layout_weight="1"
            android:singleLine="true"
            android:padding="10dp"
            android:hint="请输入密码："
            android:inputType="textPassword"
            android:textSize="20dp"/>

        <ToggleButton
            android:id="@+id/password_toggle"
            android:layout_width="30dp"
            android:layout_height="30dp"
            android:background="@drawable/icon_toggle"
            android:checked="false"
            android:textOff=""
            android:textOn=""
            android:layout_gravity="center"/>
    </LinearLayout>

    <ImageView
        android:layout_width="fill_parent"
        android:layout_height="1dp"
        android:background="#ffffff"/>

</LinearLayout>

####2、ToggleButton 多选选择

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_checked="false" android:drawable="@drawable/icon_toggle_invisible"
        xmlns:n1="http://schemas.android.com/apk/res/android" />
    <item android:state_checked="true" android:drawable="@drawable/icon_toggle_visible"
        xmlns:n2="http://schemas.android.com/apk/res/android" />
</selector>

####4、功能代码实现

package com.example.lumeng.myapplicationwifipassed;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.InputType;
import android.view.View;
import android.widget.EditText;
import android.widget.ToggleButton;

public class MainActivity extends AppCompatActivity  implements View.OnClickListener {

    private EditText mWifiPassWord;      // wifi 密码
    private ToggleButton mToggleButton; //密码显示
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mWifiPassWord = (EditText) findViewById(R.id.set_wifi_password_id);
        mToggleButton  = (ToggleButton) findViewById(R.id.password_toggle);
        mToggleButton.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.password_toggle:
                if (mToggleButton.isSelected()) {
                    mToggleButton.setSelected(false);
                    mWifiPassWord.setInputType(InputType.TYPE_TEXT_VARIATION_PASSWORD |
                            InputType.TYPE_CLASS_TEXT );//设置密码不可见
                } else {
                    mToggleButton.setSelected(true);
                    mWifiPassWord.setInputType(InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);//设置密码可见
                }
                break;
                default:
                    break;
        }
    }
}

demo 下载：