Question

我有一个简单的测验应用程序。它有六个片段和一个得分页面，其中包含正确和错误答案的数量。在每个片段中都有一个问题，答案的单选按钮和“提交”。（btn1）按钮。在这个按钮中检查答案，它一直工作到这里但是当我在onClick方法中编写代码来移动另一个页面时，它出错了。我的错是什么？

public class Question1 extends Fragment {

RadioButton q1a2;
Button btn1;


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
    View v = inflater.inflate(R.layout.fragment_question1, null);
    return v;
}

public void onActivityCreated(Bundle savedInstanceState){
    super.onActivityCreated(savedInstanceState);
    q1a2 = (RadioButton)getView().findViewById(R.id.q1a2);
    btn1 =(Button)getView().findViewById(R.id.btn1);

    final SharedPreferences app_preferences = PreferenceManager.getDefaultSharedPreferences(getActivity());
    btn1.setOnClickListener(new OnClickListener() {



        @Override
        public void onClick(View v) {
            SharedPreferences.Editor editor = app_preferences.edit();



            if(q1a2.isChecked()){

                editor.putInt("answer_value", 1);

            }else{
                editor.putInt("answer_value", 0);

            }


            editor.commit();

            Intent q1 = new Intent(Question1.this.getActivity(), Question2.class);
            startActivity(q1);

        }


    });



}

}

在manifest.xml中可能是个错误吗？

的Manifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.pc.quizapplicationproject">

<!-- To auto-complete the email text field in the login form with the user's emails -->
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.READ_PROFILE" />
<uses-permission android:name="android.permission.READ_CONTACTS" />

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">


    <activity
        android:name=".LoginActivity"
        android:label="@string/title_activity_login"
        android:launchMode="singleTask">

    <intent-filter>
        <action android:name="android.intent.action.MAIN" />

        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>


</activity>


    <activity android:name=".Register"></activity>
        <activity android:name=".MainQuizActivity">
            <activity android:name=".Question1"/>
            <activity android:name=".Question2"/>




        </activity>





    <activity android:name="com.example.pc.quizapplicationproject.Score" />
</application>

Answer 1

您只需要用于打开新活动的活动上下文。

Intent q1 = new Intent(getActivity(), Question2.class);
            startActivity(q1);

Answer 2

您需要在'C:\Program Files\Docker\Docker\resources\MobyLinux.ps1' -Destroy $service = Get-WmiObject -Class Win32_Service -Filter "Name='com.docker.service'" $service.StopService() $service.Delete() Start-Sleep -s 5 Remove-Item -Recurse -Force "~/AppData/Local/Docker" Remove-Item -Recurse -Force "~/AppData/Roaming/Docker" takeown.exe /F "C:\ProgramData\Docker" /R /A /D Y icacls "C:\ProgramData\Docker" /T /C /grant Administrators:F Remove-Item -Recurse -Force "C:\ProgramData\Docker" Remove-Item -Recurse -Force "C:\Program Files\Docker" Remove-Item -Recurse -Force "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Docker" Remove-Item -Force "C:\Users\Public\Desktop\Docker for Windows.lnk" Get-ChildItem hklm:\software\microsoft\windows\currentversion\uninstall | ForEach-Object {Get-ItemProperty $.PSPath} | Where-Object { $.DisplayName -eq "Docker" } | Remove-Item -Recurse -Force Get-ChildItem hklm:\software\classes\installer\products | ForEach-Object {Get-ItemProperty $_.pspath} | Where-Object { $_.ProductName -eq "Docker" } | Remove-Item -Recurse -Force Get-Item 'HKLM:\software\Docker Inc.' | Remove-Item -Recurse -Force Get-ItemProperty -path HKCU:\software\microsoft\windows\currentversion\Run -name "Docker for Windows" | Remove-Item -Recurse -Force

中引用按钮

喜欢这个

onCreateView(){

我还建议你在onCreateView（）

中引用单选按钮

btn=(Button)v.findViewById(R.id.b tn1);

Answer 3

删除getview（）

btn=(Button) findViewById(R.id.btn1);

和

Intent intent = new Intent(Question1.this, Question2.class);
startActivity(intent);

如何将页面重定向到另一个活动？

3 个答案: