[Android] enables dynamic display of hidden password input box content

When setting the input password box, you may need to click to control whether the input is "plain text" or "dark text ".

Here, we provide a method for Android to dynamically display and hide the content of the password input box:

The password is hidden or displayed by setting the setTransformationMethod () method of EditText.

Java files

Package com. app; import android. OS. bundle; import android. app. activity; import android. text. method. hideReturnsTransformationMethod; import android. text. method. passwordTransformationMethod; import android. view. view; import android. view. view. onClickListener; import android. widget. button; import android. widget. editText;/*** Android dynamically displays the content of the hidden password input box */public class MainActivity extends Activity {private Button mB TnPassword; private EditText mEtPassword; private boolean mbDisplayFlg = false; @ Override public void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); mEtPassword = (EditText) findViewById (R. id. password); mBtnPassword = (Button) findViewById (R. id. button1); mBtnPassword. setOnClickListener (new OnClickListener () {@ Override public void on Click (View v) {if (! MbDisplayFlg) {mEtPassword. setTransformationMethod (HideReturnsTransformationMethod. getInstance ();} else {mEtPassword. setTransformationMethod (PasswordTransformationMethod. getInstance ();} mbDisplayFlg =! MbDisplayFlg; mEtPassword. postInvalidate ();}});}}

Layout File

<RelativeLayout 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: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=".MainActivity" >    <EditText android:id="@+id/password"          android:layout_width="fill_parent"          android:layout_height="wrap_content"          android:password="true"          android:textSize="18sp"          android:text="123456">      </EditText>    <Button        android:id="@+id/button1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignLeft="@+id/password"        android:layout_below="@+id/password"        android:layout_marginLeft="56dp"        android:layout_marginTop="48dp"        android:text="Button" /></RelativeLayout>