Android開發之密碼明文密文切換顯示

.xml文件

<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"

    tools:context=".MainActivity" 

    android:orientation="vertical">

    <TextView

        android:id="@+id/msg"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="用戶密碼" />

    <EditText 

        android:id="@+id/edit"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:password="true"/>

    

    <CheckBox 

        android:id="@+id/show"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="顯示密碼"/>

</LinearLayout>

.java文件

public class MainActivity extends Activity {

private EditText passwd=null;

private CheckBox show=null;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

this.passwd=(EditText) super.findViewById(R.id.edit);

this.show=(CheckBox) super.findViewById(R.id.show);

this.show.setOnClickListener(new OnclickListenerImp());

}

private class OnclickListenerImp implements OnClickListener{

public void onClick(View v) {

if(MainActivity.this.show.isChecked()){

//設置爲明文顯示

MainActivity.this.passwd.setTransformationMethod(HideReturnsTransformationMethod.getInstance());

}

else{

//設置爲祕聞顯示

MainActivity.this.passwd.setTransformationMethod(PasswordTransformationMethod.getInstance());

}

}

}

}