應用程序在啓動活動時崩潰

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應用程序在加載活動時崩潰，但如果我取消將註冊表文本作爲鏈接到網站的註釋，代碼將正常工作，但代碼完全相同的副本只是不同的鏈接會導致應用程序，代碼崩潰下面。應用程序在啓動活動時崩潰

的活動是一個帶有鏈接的登錄頁面進行註冊並重置密碼

logcat的

08-04 21:34:07.006 11888-11888/net.twistedcircuits.greenroadsmalta 
D/LOGIN PAGE: ______login page loaded 
08-04 21:34:07.006 11888-11888/net.twistedcircuits.greenroadsmalta D/AndroidRuntime: Shutting down VM 
    08-04 21:34:07.007 11888-11888/net.twistedcircuits.greenroadsmalta E/AndroidRuntime: FATAL EXCEPTION: main 
                         Process: net.twistedcircuits.greenroadsmalta, PID: 11888 
                         java.lang.RuntimeException: Unable to start activity ComponentInfo{net.twistedcircuits.greenroadsmalta/net.twistedcircuits.greenroadsmalta.LoginActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setMovementMethod(android.text.method.MovementMethod)' on a null object reference 
                          at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2924) 
                          at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2985) 
                          at android.app.ActivityThread.-wrap14(ActivityThread.java) 
                          at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1635) 
                          at android.os.Handler.dispatchMessage(Handler.java:102) 
                          at android.os.Looper.loop(Looper.java:154) 
                          at android.app.ActivityThread.main(ActivityThread.java:6692) 
                          at java.lang.reflect.Method.invoke(Native Method) 
                          at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1468) 
                          at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1358) 
                          Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setMovementMethod(android.text.method.MovementMethod)' on a null object reference 
                          at net.twistedcircuits.greenroadsmalta.LoginActivity.onCreate(LoginActivity.java:56) 
                          at android.app.Activity.performCreate(Activity.java:6912) 
                          at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1126) 
                          at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2877) 
                          at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2985)  
                          at android.app.ActivityThread.-wrap14(ActivityThread.java)  
                          at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1635)  
                          at android.os.Handler.dispatchMessage(Handler.java:102)  
                          at android.os.Looper.loop(Looper.java:154)  
                          at android.app.ActivityThread.main(ActivityThread.java:6692)  
                          at java.lang.reflect.Method.invoke(Native Method)  
                          at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1468)  
                          at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1358)

活動

@Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_login); 

     //lock screen for always Portrait mode 
     setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); 

     Log.d("LOGIN PAGE","______login page loaded"); 

     loginEmail = (EditText) (findViewById(R.id.LoginEmail_editText)); 
     loginPassword = (EditText) (findViewById(R.id.LoginPassword_editText)); 


     //************************ Make Register text as link to website ************************// 
/* 
     registerLinkText = (TextView) (findViewById(R.id.registerLink_textView)); 
     registerLinkText.setClickable(true); 
     registerLinkText.setMovementMethod(LinkMovementMethod.getInstance()); 

     register_text = "<a href='http://www.google.com'>No account yet? Create One</a>"; 
     registerLinkText.setText(fromHtml(register_text)); 
     registerLinkText.setLinkTextColor(getResources().getColor(R.color.loginTextColor)); 
*/ 
     //**********************************************************************************// 

     //************************ Make Lost Password text as link to website ************************// 
     lostPasswordLinkText = (TextView) (findViewById(R.id.lostPasswordLink_textView)); 
     lostPasswordLinkText.setClickable(true); 
     registerLinkText.setMovementMethod(LinkMovementMethod.getInstance()); 

     password_text = "<a href='https://www.google.com.mt/search?q=dementia&spell=1&sa=X&ved=0ahUKEwiWyovunL7VAhXDzRQKHa2ND_0QBQgkKAA&biw=1152&bih=956'>Forgot your password?</a>"; 
     lostPasswordLinkText.setText(fromHtml(password_text)); 
     lostPasswordLinkText.setLinkTextColor(getResources().getColor(R.color.loginTextColor)); 
    } 
}

來源

2017-08-04 Cardona

registerLinkText爲空。它沒有被綁定到xml佈局的視圖。

registerLinkText = (TextView) (findViewById(R.id.registerLink_textView));

取消註釋以上這一行。

來源

2017-08-04 19:49:50 Bob

這部分作品，如果我取消註釋上面的行，但問題是下面的代碼塊// *****使丟失的密碼文本鏈接到網站****** // – Cardona

aaaaa射擊得到它感謝:) – Cardona

應用程序在啓動活動時崩潰

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