本文将为您提供关于java.lang.IllegalStateException：在androidx.fragment.app.FragmentManagerImpl.addFragment处的详细介

本文将为您提供关于java.lang.IllegalStateException：在androidx.fragment.app.FragmentManagerImpl.addFragment处的详细介绍，同时，我们还将为您提供关于### Error querying database. Cause: java.lang.IllegalArgumentException: invalid comparison: cn.xiaojian.blog.po.BlogType and java.lang.String ### Cause: java.lang.IllegalArgumentException: ...、'com.company.MotherBoard' 中的错误 'MotherBoard(java.lang.String, java.lang.String, float, java.lang.String)' 不能应用于 '()'、Android DialogFragment 遇到 java.lang.IllegalStateException: Fragment already added: 的解决方法、Android Studio，java.lang.ClassCastException：java.lang.String 无法转换为 java.lang.Long的实用信息。

• java.lang.IllegalStateException：在androidx.fragment.app.FragmentManagerImpl.addFragment处
• ### Error querying database. Cause: java.lang.IllegalArgumentException: invalid comparison: cn.xiaojian.blog.po.BlogType and java.lang.String ### Cause: java.lang.IllegalArgumentException: ...
• 'com.company.MotherBoard' 中的错误 'MotherBoard(java.lang.String, java.lang.String, float, java.lang.String)' 不能应用于 '()'
• Android DialogFragment 遇到 java.lang.IllegalStateException: Fragment already added: 的解决方法
• Android Studio，java.lang.ClassCastException：java.lang.String 无法转换为 java.lang.Long

java.lang.IllegalStateException：在androidx.fragment.app.FragmentManagerImpl.addFragment处

如何解决java.lang.IllegalStateException：在androidx.fragment.app.FragmentManagerImpl.addFragment处

某些Android手机中出现IllegalStateException（Redmi Note 8 pro，Samsung galaxy Note10 +等） 在其他设备上也可以正常工作。

从Google Play控制台获取以下错误报告。该代码包含一个viewpager和8个片段。 如何解决这个错误？

错误：java.lang.IllegalStateException：位于androidx.fragment.app.FragmentManagerImpl.addFragment

 java.lang.IllegalStateException: 


  at androidx.fragment.app.FragmentManagerImpl.addFragment (FragmentManagerImpl.java:1379)
  at androidx.fragment.app.BackStackRecord.executeOps (BackStackRecord.java:399)
  at androidx.fragment.app.FragmentManagerImpl.executeOps (FragmentManagerImpl.java:2079)
  at androidx.fragment.app.FragmentManagerImpl.executeOpsTogether (FragmentManagerImpl.java:1869)
  at androidx.fragment.app.FragmentManagerImpl.removeRedundantOperationsAndExecute (FragmentManagerImpl.java:1824)
  at androidx.fragment.app.FragmentManagerImpl.execSingleAction (FragmentManagerImpl.java:1696)
  at androidx.fragment.app.BackStackRecord.commitNowAllowingStateLoss (BackStackRecord.java:299)
  at androidx.fragment.app.FragmentPagerAdapter.finishUpdate (FragmentPagerAdapter.java:235)
  at androidx.viewpager.widget.ViewPager.populate (ViewPager.java:1244)
  at androidx.viewpager.widget.ViewPager.populate (ViewPager.java:1092)
  at androidx.viewpager.widget.ViewPager.onMeasure (ViewPager.java:1622)
  at android.view.View.measure (View.java:25094)
  at androidx.constraintlayout.widget.ConstraintLayout$Measurer.measure (ConstraintLayout.java:724)
  at androidx.constraintlayout.solver.widgets.analyzer.Basicmeasure.measure (Basicmeasure.java:394)
  at androidx.constraintlayout.solver.widgets.analyzer.Basicmeasure.measureChildren (Basicmeasure.java:105)
  at androidx.constraintlayout.solver.widgets.analyzer.Basicmeasure.solverMeasure (Basicmeasure.java:227)
  at androidx.constraintlayout.solver.widgets.ConstraintWidgetContainer.measure (ConstraintWidgetContainer.java:113)
  at androidx.constraintlayout.widget.ConstraintLayout.resolveSystem (ConstraintLayout.java:1460)
  at androidx.constraintlayout.widget.ConstraintLayout.onMeasure (ConstraintLayout.java:1539)
  at android.view.View.measure (View.java:25094)
  at androidx.core.widget.nestedScrollView.measureChildWithMargins (nestedScrollView.java:1599)
  at android.widget.FrameLayout.onMeasure (FrameLayout.java:194)
  at androidx.core.widget.nestedScrollView.onMeasure (nestedScrollView.java:585)
  at android.view.View.measure (View.java:25094)
  at androidx.constraintlayout.widget.ConstraintLayout$Measurer.measure (ConstraintLayout.java:724)
  at androidx.constraintlayout.solver.widgets.analyzer.Basicmeasure.measure (Basicmeasure.java:394)
  at androidx.constraintlayout.solver.widgets.analyzer.Basicmeasure.measureChildren (Basicmeasure.java:105)
  at androidx.constraintlayout.solver.widgets.analyzer.Basicmeasure.solverMeasure (Basicmeasure.java:227)
  at androidx.constraintlayout.solver.widgets.ConstraintWidgetContainer.measure (ConstraintWidgetContainer.java:113)
  at androidx.constraintlayout.widget.ConstraintLayout.resolveSystem (ConstraintLayout.java:1460)
  at androidx.constraintlayout.widget.ConstraintLayout.onMeasure (ConstraintLayout.java:1539)
  at android.view.View.measure (View.java:25094)
  at androidx.viewpager.widget.ViewPager.onMeasure (ViewPager.java:1638)
  at android.view.View.measure (View.java:25094)
  at androidx.constraintlayout.widget.ConstraintLayout$Measurer.measure (ConstraintLayout.java:724)
  at androidx.constraintlayout.solver.widgets.analyzer.Basicmeasure.measure (Basicmeasure.java:394)
  at androidx.constraintlayout.solver.widgets.analyzer.Basicmeasure.measureChildren (Basicmeasure.java:105)
  at androidx.constraintlayout.solver.widgets.analyzer.Basicmeasure.solverMeasure (Basicmeasure.java:227)
  at androidx.constraintlayout.solver.widgets.ConstraintWidgetContainer.measure (ConstraintWidgetContainer.java:113)
  at androidx.constraintlayout.widget.ConstraintLayout.resolveSystem (ConstraintLayout.java:1460)
  at androidx.constraintlayout.widget.ConstraintLayout.onMeasure (ConstraintLayout.java:1539)
  at android.view.View.measure (View.java:25094)
  at android.view.ViewGroup.measureChildWithMargins (ViewGroup.java:6968)
  at android.widget.FrameLayout.onMeasure (FrameLayout.java:194)
  at androidx.appcompat.widget.ContentFrameLayout.onMeasure (ContentFrameLayout.java:143)
  at android.view.View.measure (View.java:25094)
  at android.view.ViewGroup.measureChildWithMargins (ViewGroup.java:6968)
  at android.widget.LinearLayout.measureChildBeforeLayout (LinearLayout.java:1552)
  at android.widget.LinearLayout.measureVertical (LinearLayout.java:842)
  at android.widget.LinearLayout.onMeasure (LinearLayout.java:721)
  at android.view.View.measure (View.java:25094)
  at android.view.ViewGroup.measureChildWithMargins (ViewGroup.java:6968)
  at android.widget.FrameLayout.onMeasure (FrameLayout.java:194)
  at android.view.View.measure (View.java:25094)
  at android.view.ViewGroup.measureChildWithMargins (ViewGroup.java:6968)
  at android.widget.LinearLayout.measureChildBeforeLayout (LinearLayout.java:1552)
  at android.widget.LinearLayout.measureVertical (LinearLayout.java:842)
  at android.widget.LinearLayout.onMeasure (LinearLayout.java:721)
  at android.view.View.measure (View.java:25094)
  at android.view.ViewGroup.measureChildWithMargins (ViewGroup.java:6968)
  at android.widget.FrameLayout.onMeasure (FrameLayout.java:194)
  at com.android.internal.policy.DecorView.onMeasure (DecorView.java:775)
  at android.view.View.measure (View.java:25094)
  at android.view.ViewRootImpl.performMeasure (ViewRootImpl.java:3245)
  at android.view.ViewRootImpl.measureHierarchy (ViewRootImpl.java:2000)
  at android.view.ViewRootImpl.performTraversals (ViewRootImpl.java:2305)
  at android.view.ViewRootImpl.doTraversal (ViewRootImpl.java:1888)
  at android.view.ViewRootImpl$TraversalRunnable.run (ViewRootImpl.java:8043)
  at android.view.Choreographer$CallbackRecord.run (Choreographer.java:969)
  at android.view.Choreographer.doCallbacks (Choreographer.java:793)
  at android.view.Choreographer.doFrame (Choreographer.java:728)
  at android.view.Choreographer$FramedisplayEventReceiver.run (Choreographer.java:954)
  at android.os.Handler.handleCallback (Handler.java:914)
  at android.os.Handler.dispatchMessage (Handler.java:100)
  at android.os.Looper.loop (Looper.java:224)
  at android.app.ActivityThread.main (ActivityThread.java:7551)
  at java.lang.reflect.Method.invoke (Native Method)
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:539)
  at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:995)

### Error querying database. Cause: java.lang.IllegalArgumentException: invalid comparison: cn.xiaojian.blog.po.BlogType and java.lang.String ### Cause: java.lang.IllegalArgumentException: ...

'com.company.MotherBoard' 中的错误 'MotherBoard(java.lang.String, java.lang.String, float, java.lang.String)' 不能应用于 '()'

如何解决''com.company.MotherBoard'' 中的错误 ''MotherBoard(java.lang.String, java.lang.String, float, java.lang.String)'' 不能应用于 ''()''

我一直试图在另一个类中实例化一个类的对象，但它给了我标题中描述的错误。

例如，代码如下所示：

package com.company;

public class Desktop {
    private String coolerType;

    public motherboard mb = new motherboard();

    public GraphicsCard gpu = new GraphicsCard();

    public String getCoolerType() {
        return coolerType;
    }

    public void setCoolerType(String coolerType) {
        if(!this.coolerType.isEmpty()) {
            this.coolerType = coolerType;
        }
    }

    public Desktop(String coolerType) {
        this.coolerType = coolerType;
    }
}

“motherboard”和“GraphicsCard”是项目中的类，我想在“Desktop”类中实例化它们。

任何帮助将不胜感激:)

Android DialogFragment 遇到 java.lang.IllegalStateException: Fragment already added: 的解决方法

使用AppCompatDialogFragment 或者 DialogFragment 的过程中遇到java.lang.IllegalStateException: Fragment already added: 的解决方法：

private CountryChooseDialog mCountryChooseDialog;
private void showCountryChooseDialog() {
    if (mCountryChooseDialog == null) {
      mCountryChooseDialog = CountryChooseDialog.newInstance();
    }
    if (mCountryChooseDialog.isAdded()) {　　//解决方法就是添加这行代码，如果已经添加了，就移除掉然后再show，就不会出现Fragment already added的错误了。
      getSupportFragmentManager().beginTransaction().remove(mCountryChooseDialog).commit();
    }
    mCountryChooseDialog.show(getSupportFragmentManager(), mCountryChooseDialog.getClass().getName());
}

Android Studio，java.lang.ClassCastException：java.lang.String 无法转换为 java.lang.Long

如何解决Android Studio，java.lang.ClassCastException：java.lang.String 无法转换为 java.lang.Long

我不断收到此错误消息

java.lang.classCastException: java.lang.String 不能转换为 java.lang.Long

我正在尝试使用共享首选项在活动之间传递一个长值，这是我的第一个活动的代码

SharedPreferences sp = getApplicationContext().getSharedPreferences("userdata",Context.MODE_PRIVATE);
Calendar cal = Calendar.getInstance();
SharedPreferences.Editor editor = sp.edit();
editor.putLong("time"+i,cal.getTimeInMillis());
editor.commit();

这是我的第二个活动的代码。

ArrayList<Long> time         = new ArrayList<Long>();
sp = getSharedPreferences("userdata",Context.MODE_PRIVATE);
time.add(sp.getLong("time"+i,0)); // here is where the error occurs

“time”末尾的 +i 的原因是这些 put 和 receive 消息在 for 循环中运行，因为有多个 long 正在传递并且顺序很重要。请告诉我是否还有其他方法可以执行此操作或如何解决此异常。

谢谢

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