我想通过当密码验证完成后显示在PasswordUnlockScreen.java文件的Toast通知修改的Andr​​oid框架。我已经添加了code以下行verifyPasswordAndUnlock（）

  Toast.makeText（getApplicationContext（），验证密码，Toast.LENGTH_LONG）.show（）;
 

不过，我得到的生成错误：

frameworks/base/policy/src/com/android/internal/policy/impl/PasswordUnlockScreen.java:166:找不到符号符号：方法getApplicationContext（） 位置：类com.android.internal.policy.impl.PasswordUnlockScreen Toast.makeText（getApplicationContext（），验证密码，Toast.LENGTH_LONG）.show（）;

我应该为背景，而不是getApplicationContext（）？

使用

谢谢！

解决方案

试试这个：

  Toast.makeText（PasswordUnlockScreen.this，验证密码，Toast.LENGTH_LONG）.show（）;
 

I'm trying to modify the Android framework by displaying an Toast notification in the PasswordUnlockScreen.java file when a password verification is done. I've added the following line of code in verifyPasswordAndUnlock()

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

However, I get the build error:

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();

What should I use as the context instead of getApplicationContext()?

Thanks!

解决方案

Try this one :

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