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我試圖將一些數據放入一個捆綁包並將其傳輸到一個片段。但是日誌顯示了片段中的NullPointerException的錯誤，我不知道兩者之間的關係是什麼。Android碎片上的NullPointerException
錯誤代碼：
09-22 14:19:03.216 1918-1918/com.example.user.unchained E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.example.user.unchained, PID: 1918
java.lang.NullPointerException
at com.example.user.unchained.HeaderFragement.onCreate(HeaderFragement.java:85)
at android.support.v4.app.Fragment.performCreate(Fragment.java:1481)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:908)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1121)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1484)
at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:450)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at dalvik.system.NativeStart.main(Native Method)
所述片段代碼：
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
name = (TextView) getView().findViewById(R.id.nameH);
img = (ImageView) getView().findViewById(R.id.imageViewHeader);
Bundle infos = getArguments();
name.setText(infos.getString("Name"));
img.setImageBitmap(getBitmapFromURL(infos.getString("ImgUrl")));
//Name.setText(Name.getText()+" "+infos.getString("Name"));
}
其中我把數據包中的活性的影響。
protected void onPostExecute(final String res) {
//LoginTask = null;
//showProgress(false);
try {
jObj = new JSONObject(res);
} catch (JSONException e) {
e.printStackTrace();
}
try {
if (jObj.getString("code").equals("1")) {
infos = new Bundle();
infos.putString("ID",jObj.getString("ID"));
infos.putString("Name",jObj.getString("display_name"));
infos.putString("ImgUrl","http://unchained-network.com/uploads/profilpics/53f5c570b6ac2.png");
android.support.v4.app.FragmentTransaction tr = getSupportFragmentManager().beginTransaction();
HeaderFragement hf = new HeaderFragement();
//Charger les infos dans l'activité
hf.setArguments(infos);
tr.replace(R.id.frgmnt, hf);
tr.commit();
Intent myIntent = new Intent(getActivity(), HomesActivity.class);
//Lançer l'activité
startActivityForResult(myIntent, 0);
} else {
//password.setError(getString(R.string.error_incorrect_password));
//password.requestFocus();
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setTitle("Error !");
builder.setMessage("The information entered is incorrect.\nPlease try again!")
.setCancelable(false)
.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alert = builder.create();
alert.show();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
佈局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#000"
android:orientation="vertical" >
<!-- Login progress -->
<ProgressBar
android:id="@+id/login_progress"
style="?android:attr/progressBarStyleLarge"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="50dp"
android:visibility="gone"/>
<ScrollView
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1" >
<LinearLayout
android:id="@+id/login_form"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="10dp"
android:paddingLeft="15dp"
android:paddingRight="15dp"
android:paddingTop="5dp" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/logo"
android:focusableInTouchMode="true"
android:src="@drawable/unchained_beta_logo"
android:layout_marginTop="20dp"
android:gravity="center"
android:contentDescription="Unchained-Network Logo"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true" />
<EditText
style="@style/SignInEditText"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:completionThreshold="1"
android:inputType="textEmailAddress"
android:layout_marginTop="64dp"
android:layout_below="@+id/logo"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:id="@+id/email"
android:hint="Email" />
<EditText
style="@style/SignInEditText"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:completionThreshold="1"
android:inputType="textPassword"
android:layout_marginTop="20dp"
android:layout_below="@+id/email"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:id="@+id/password"
android:hint="Password" />
<Button
android:id="@+id/connexion"
style="@style/ShadowText"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="50dp"
android:layout_below="@+id/password"
android:background="@color/green_android"
android:gravity="center"
android:padding="10dp"
android:textColor="#fff"
android:textSize="20sp"
android:textStyle="bold"
android:text="Go Ride !"
/>
<TextView
android:layout_width="200dp"
android:id="@+id/passf"
style="@style/ShadowText"
android:layout_height="30dp"
android:layout_marginLeft="70dp"
android:text="Forgotten your password?"
android:layout_marginTop="20dp"
android:gravity="center"
android:textSize="10sp"
android:textStyle="bold"
android:textColor="#feed01" />
<TextView
android:layout_width="200dp"
style="@style/ShadowText"
android:layout_height="30dp"
android:layout_marginLeft="70dp"
android:text="No account yet ? Get one "
android:layout_marginTop="5dp"
android:gravity="center"
android:id="@+id/newaccount"
android:textSize="14sp"
android:textStyle="bold"
android:textColor="#fff" />
</LinearLayout>
</ScrollView>
</LinearLayout>
佈局取代從的onCreate到onActivityCreated您的代碼塊（）方法 – santalu 2014-09-22 14:31:12
我認爲現在是很好的，但仍然有一個錯誤： 'java.lang.IllegalArgumentException：沒有找到id爲0x7f070075（com.example.user.unchained：id/frgmnt）的片段HeaderFragement {53c330a8＃0 id = 0x7f070075} ' – 2014-09-22 14:35:33
你能分享你的xml文件請 – santalu 2014-09-22 14:36:58