Android 에서 EditText 는 명문 과 비밀 번 호 를 표시 하 는 두 가지 방식 입 니 다.

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="liu.basedemo.MainActivity">
<EditText
android:id="@+id/etUsername"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="20dp"
android:hint="      "
android:textColor="#000000"
android:textColorHint="#55000000"
android:textSize="20sp"/>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical">
<EditText
android:id="@+id/etPassword"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="20dp"
android:hint="     "
android:inputType="textPassword"
android:textColor="#000000"
android:textColorHint="#55000000"
android:textSize="20sp"/>
<CheckBox
android:checked="false"
android:id="@+id/cbDisplayPassword"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:button="@drawable/selector_password"/>
</RelativeLayout>
</LinearLayout>
selector
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@mipmap/cb_checked" android:state_checked="true"/>
<item android:drawable="@mipmap/cb_normaled" android:state_checked="false"/>
</selector>

private void initListener() {
mCbDisplayPassword.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
Log.d(TAG, "onCheckedChanged: "+isChecked);
if(isChecked){
//         --        
mEtPassword.setInputType(InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
}else {
//        --               InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD
mEtPassword.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
}
}
});
}

private void initListener() {
mCbDisplayPassword.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
Log.d(TAG, "onCheckedChanged: "+isChecked);
if(isChecked){
//         --        
//mEtPassword.setInputType(InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
/**
*    
*/
mEtPassword.setTransformationMethod(HideReturnsTransformationMethod.getInstance());
}else {
//        --               InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD
//mEtPassword.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
/**
*    
*/
mEtPassword.setTransformationMethod(PasswordTransformationMethod.getInstance());
}
}
});
}