顯示在Android框架

Question

我想通過當密碼驗證完成後顯示在PasswordUnlockScreen.java文件的Toast通知修改的Android框架Toast通知。我已經添加下面的代碼行verifyPasswordAndUnlock（）

Toast.makeText(getApplicationContext(), "Verifying password", Toast.LENGTH_LONG).show(); 

不過，我得到生成錯誤：

frameworks/base/policy/src/com/android/internal/policy/impl/PasswordUnlockScreen.java:166: cannot find symbol symbol : method getApplicationContext() 
location: class com.android.internal.policy.impl.PasswordUnlockScreen 
Toast.makeText(getApplicationContext(), "Verifying password", Toast.LENGTH_LONG).show(); 

我應該爲背景，而不是getApplicationContext使用（）？

謝謝！

Answer 1

試試這個：

Toast.makeText(PasswordUnlockScreen.this, "Verifying password", Toast.LENGTH_LONG).show();