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我有一个Android应用程序,针对api级别9和用户应用程序compat库。所以我有这个问题,当我点击一个按钮,它应该表现出一个片段,但我不知道为什么这是不可能的,因为它显示我此错误日志猫:显示一个片段抛出空指针异常
/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.myapp, PID: 14290
java.lang.NullPointerException
at com.myapp.Main.onClick(Main.java:1204)
at android.view.View.performClick(View.java:4654)
at android.view.View$PerformClick.run(View.java:19438)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5602)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)
这是我的错误:
@Override
public void onClick(View v) {
Log.d("--", "view clicked");
if (adapter != null)
if (!menuShown && adapter.getNextPrayTime() != null) {
switch (v.getId()) {
case R.id.action_share:
View view = findViewById(R.id.main_rl);
shareImage(view, false);
break;
case R.id.action_menu:
Bundle bundle = new Bundle();
bundle.putSerializable(Constants.NEXT_TIME,
adapter.getNextPrayTime());
MenuFragment menuFragment = new MenuFragment();
menuFragment.setArguments(bundle);
Log.e("--",menuFragment+" ex. "+bundle);
//this is line 1204
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.commitAllowingStateLoss();
transaction.setCustomAnimations(
R.anim.slide_in_from_bottom,
R.anim.slide_out_to_bottom,
R.anim.slide_in_from_bottom,
R.anim.slide_out_to_bottom);
transaction.add(android.R.id.content, menuFragment);
transaction.addToBackStack(null);
transaction.commit();
menuShown = true;
break;
}
}
}
有没有人有一个想法为什么会发生这种情况,所以我可以解决这个问题?
感谢
编辑:这个活动延伸ActionBarActivity
你生成JAR Android的支持,v4.jar? – Hulk
点击方法显示。 – Piyush
你确定这是1204行吗? 'getSupportFragmentManager'不能返回'null' – nikis