Android implements dynamic display or hiding of the contents of the password entry box

This article shows Android's method of dynamically displaying or hiding the contents of password input box. The specific methods are as follows:

This can be done by setting the setTransformationMethod() method of EditText to hide or display the password.

The sample code is as follows:

private Button mBtnPassword;
private EditText mEtPassword;
private boolean mbDisplayFlg = false;
 
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);

  mEtPassword = (EditText)findViewById(R.id.password);
  mBtnPassword = (Button)findViewById(R.id.btnPassword);
  mBtnPassword.setOnClickListener(new OnClickListener() {

 @Override
 public void onClick(View v) {
 // TODO Auto-generated method stub
 Log.d("AndroidTest", "mbDisplayFlg = " + mbDisplayFlg);
 if (!mbDisplayFlg) {
  // display password text, for example "123456"
  mEtPassword.setTransformationMethod(HideReturnsTransformationMethod.getInstance());
 } else {
  // hide password, display "."
  mEtPassword.setTransformationMethod(PasswordTransformationMethod.getInstance());
 }
 mbDisplayFlg = !mbDisplayFlg;
 mEtPassword.postInvalidate();
 }
  });
}

main. xml file is as follows:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 android:orientation="vertical" android:layout_width="fill_parent"
 android:layout_height="fill_parent">
 <Button android:id="@+id/btnPassword"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:text=" password " />
 <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>
</LinearLayout>

I hope this article has been helpful for your Android programming.