Android动态显示隐藏密码输入框的内容

通过设置EditText的setTransformationMethod()方法来实现隐藏密码或这显示密码，示例如下：

 

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

 

<?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="密码" />
    <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>