我在 TabGroupActivity 中加载的活动有点问题
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.user_profile);
f = new Functions();
String j = f.getUserInfo();
arialFont = Typeface.createFromAsset(this.getAssets(),"Arial.ttf");
username = (TextView)findViewById(R.id.txtProfileName);
firstname = (TextView)findViewById(R.id.txtName);
Address1 = (TextView)findViewById(R.id.txtAdd1);
Cit = (TextView)findViewById(R.id.txtCity);
PostCode = (TextView)findViewById(R.id.txtPost);
Coun = (TextView)findViewById(R.id.txtCountry);
Phon = (TextView)findViewById(R.id.txtPhone);
dob = (TextView)findViewById(R.id.txtDOB);
gender = (TextView)findViewById(R.id.txtGender);
yourDetails = (Button)findViewById(R.id.Button01);
payment = (Button)findViewById(R.id.Button02);
billing = (Button)findViewById(R.id.Button03);
history = (Button)findViewById(R.id.Button04);
yourDetails.setTypeface(arialFont); <-- Null Pointer exception starts here
payment.setTypeface(arialFont);
billing.setTypeface(arialFont);
history.setTypeface(arialFont);
try {
parseData(j);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
我从代码中收到的错误是:
02-27 13:22:47.278: E/AndroidRuntime(929): Caused by: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.Ticketline.Ticketline/com.Ticketline.Ticketline.UserProfile}: java.lang.NullPointerException
02-27 13:22:47.278: E/AndroidRuntime(929): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1955)
02-27 13:22:47.278: E/AndroidRuntime(929): at android.app.ActivityThread.startActivityNow(ActivityThread.java:1796)
02-27 13:22:47.278: E/AndroidRuntime(929): at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:135)
02-27 13:22:47.278: E/AndroidRuntime(929): at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:347)
02-27 13:22:47.278: E/AndroidRuntime(929): at com.Ticketline.Ticketline.TabGroupActivity.startChildActivity(TabGroupActivity.java:61)
02-27 13:22:47.278: E/AndroidRuntime(929): at com.Ticketline.Ticketline.Account.onCreate(Account.java:33)
02-27 13:22:47.278: E/AndroidRuntime(929): at android.app.Activity.performCreate(Activity.java:4465)
02-27 13:22:47.278: E/AndroidRuntime(929): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
02-27 13:22:47.278: E/AndroidRuntime(929): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1919)
02-27 13:22:47.278: E/AndroidRuntime(929): ... 18 more
02-27 13:22:47.278: E/AndroidRuntime(929): Caused by: java.lang.NullPointerException
02-27 13:22:47.278: E/AndroidRuntime(929): at com.Ticketline.Ticketline.UserProfile.onCreate(UserProfile.java:83)
02-27 13:22:47.278: E/AndroidRuntime(929): at android.app.Activity.performCreate(Activity.java:4465)
02-27 13:22:47.278: E/AndroidRuntime(929): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
02-27 13:22:47.278: E/AndroidRuntime(929): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1919)
02-27 13:22:47.278: E/AndroidRuntime(929): ... 26 more
我知道问题在于将按钮字体设置为 Arial,问题是我不明白为什么这是一个问题。如果我将 setTypeface 行注释掉,它可以正常工作,并将转移到其他在 TabGroupActivity 中设置了按钮字体的活动,这让我更加困惑。
任何可以向我解释这一点的人的最高分