显示 DatePickerDialog 时应用程序崩溃答案

【问题标题】：Application Crashes When Showing DatePickerDialog显示 DatePickerDialog 时应用程序崩溃
【发布时间】：2017-08-17 07:15:41
【问题描述】：

我正在使用以下代码在 onClick 方法中显示 DatePickerDialog。当用户选择我在文本视图中设置的日期时。错误发生在调用 DatePickerDialog 的第 5 行。我试过调试它，错误在确切的行上，我无法弄清楚。

@Override
public void onClick(View view) {
    if (view.getId() == R.id.startDate_et) {
        final java.util.Calendar c = java.util.Calendar.getInstance();
        mYear = c.get(java.util.Calendar.YEAR);
        mMonth = c.get(java.util.Calendar.MONTH);
        mDay = c.get(java.util.Calendar.DAY_OF_MONTH);
        DatePickerDialog datePickerDialog = new DatePickerDialog(this,
            new DatePickerDialog.OnDateSetListener() {
                @Override
                public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
                     startDateEt.setText(dayOfMonth + "-" + (monthOfYear + 1) + "-" + year);
                }
        }, mYear, mMonth, mDay);
        datePickerDialog.show();
}

但是当调用该方法时，应用程序崩溃并显示以下消息。

FATAL EXCEPTION: main
Process: com.example.bisma.calendar_analyzer, PID: 3882
android.view.InflateException: Binary XML file line #20: Binary XML file 
line #20: Error inflating class <unknown>
at android.view.LayoutInflater.inflate(LayoutInflater.java:539)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at android.app.DatePickerDialog.<init>(DatePickerDialog.java:112)
at android.app.DatePickerDialog.<init>(DatePickerDialog.java:82)
at com.example.bisma.calendar_analyzer.ui.CreateEventActivity.onClick(CreateEventActivity.java:100)
at android.view.View.performClick(View.java:5204)
at android.view.View$PerformClick.run(View.java:21153)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: android.view.InflateException: Binary XML file line #20: Error inflating class <unknown>
at android.view.LayoutInflater.createView(LayoutInflater.java:645)
at com.android.internal.policy.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:58)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:694)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:762)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:374) 
at android.app.DatePickerDialog.<init>(DatePickerDialog.java:112) 
at android.app.DatePickerDialog.<init>(DatePickerDialog.java:82) 
at com.example.bisma.calendar_analyzer.ui.CreateEventActivity.onClick(CreateEventActivity.java:100) 
at android.view.View.performClick(View.java:5204) 
at android.view.View$PerformClick.run(View.java:21153) 
at android.os.Handler.handleCallback(Handler.java:739) 
at android.os.Handler.dispatchMessage(Handler.java:95) 
at android.os.Looper.loop(Looper.java:148) 
at android.app.ActivityThread.main(ActivityThread.java:5417) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance(Native Method)
at android.view.LayoutInflater.createView(LayoutInflater.java:619)
at com.android.internal.policy.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:58) 
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:694) 
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:762) 
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:492) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:423) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:374) 
at android.app.DatePickerDialog.<init>(DatePickerDialog.java:112) 
at android.app.DatePickerDialog.<init>(DatePickerDialog.java:82) 
at com.example.bisma.calendar_analyzer.ui.CreateEventActivity.onClick(CreateEventActivity.java:100) 
at android.view.View.performClick(View.java:5204) 
at android.view.View$PerformClick.run(View.java:21153) 
at android.os.Handler.handleCallback(Handler.java:739) 
at android.os.Handler.dispatchMessage(Handler.java:95) 
at android.os.Looper.loop(Looper.java:148) 
at android.app.ActivityThread.main(ActivityThread.java:5417) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
Caused by: android.content.res.Resources$NotFoundException: File res/color/mcv_text_date_dark.xml from drawable resource ID #0x7f0c006c
at android.content.res.Resources.loadDrawableForCookie(Resources.java:2640)
at android.content.res.Resources.loadDrawable(Resources.java:2540)
at android.content.res.TypedArray.getDrawable(TypedArray.java:870)
at android.widget.DatePickerCalendarDelegate.<init>(DatePickerCalendarDelegate.java:155)
at android.widget.DatePicker.createCalendarUIDelegate(DatePicker.java:160)
at android.widget.DatePicker.<init>(DatePicker.java:140)
at android.widget.DatePicker.<init>(DatePicker.java:126)
at android.widget.DatePicker.<init>(DatePicker.java:122)
at java.lang.reflect.Constructor.newInstance(Native Method) 
at android.view.LayoutInflater.createView(LayoutInflater.java:619) 
at com.android.internal.policy.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:58) 
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:694) 
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:762) 
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:492) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:423) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:374) 
at android.app.DatePickerDialog.<init>(DatePickerDialog.java:112) 
at android.app.DatePickerDialog.<init>(DatePickerDialog.java:82) 
at com.example.bisma.calendar_analyzer.ui.CreateEventActivity.onClick(CreateEventActivity.java:100) 
at android.view.View.performClick(View.java:5204) 
at android.view.View$PerformClick.run(View.java:21153) 
at android.os.Handler.handleCallback(Handler.java:739) 
at android.os.Handler.dispatchMessage(Handler.java:95) 
at android.os.Looper.loop(Looper.java:148) 
at android.app.ActivityThread.main(ActivityThread.java:5417) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
Caused by: org.xmlpull.v1.XmlPullParserException: Binary XML file line #7: <item> tag requires a 'drawable' attribute or child tag defining a drawable
at android.graphics.drawable.StateListDrawable.inflateChildElements(StateListDrawable.java:182)
at android.graphics.drawable.StateListDrawable.inflate(StateListDrawable.java:115)
at android.graphics.drawable.Drawable.createFromXmlInner(Drawable.java:1215)
at android.graphics.drawable.Drawable.createFromXml(Drawable.java:1124)
at android.content.res.Resources.loadDrawableForCookie(Resources.java:2630)
at android.content.res.Resources.loadDrawable(Resources.java:2540) 
at android.content.res.TypedArray.getDrawable(TypedArray.java:870) 
at android.widget.DatePickerCalendarDelegate.<init>(DatePickerCalendarDelegate.java:155) 
at android.widget.DatePicker.createCalendarUIDelegate(DatePicker.java:160) 
at android.widget.DatePicker.<init>(DatePicker.java:140) 
at android.widget.DatePicker.<init>(DatePicker.java:126) 
at android.widget.DatePicker.<init>(DatePicker.java:122) 
at java.lang.reflect.Constructor.newInstance(Native Method) 
at android.view.LayoutInflater.createView(LayoutInflater.java:619) 
at com.android.internal.policy.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:58) 
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:694) 
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:762) 
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:492) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:423) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:374) 
at android.app.DatePickerDialog.<init>(DatePickerDialog.java:112) 
at android.app.DatePickerDialog.<init>(DatePickerDialog.java:82) 
at com.example.bisma.calendar_analyzer.ui.CreateEventActivity.onClick(CreateEventActivity.java:100) 
at android.view.View.performClick(View.java:5204) 
at android.view.View$PerformClick.run(View.java:21153) 
at android.os.Handler.handleCallback(Handler.java:739) 
at android.os.Handler.dispatchMessage(Handler.java:95) 
at android.os.Looper.loop(Looper.java:148) 
at android.app.ActivityThread.main(ActivityThread.java:5417) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)

这是完整的 XML

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="16dp"
tools:context="com.example.bisma.calendar_analyzer.ui.CreateEventActivity">


<EditText
    android:id="@+id/eventTitle_et"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="10dp"
    android:hint="Event Title" />

<EditText
    android:id="@+id/description_et"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_below="@+id/eventTitle_et"
    android:layout_marginTop="10dp"
    android:hint="Description" />

<TextView
    android:id="@+id/startDate_et"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_below="@+id/description_et"
    android:layout_marginTop="10dp"
    android:background="@drawable/round_field"
    android:hint="Start Date/Time"
    android:padding="10dp"
    android:textColor="@color/white"
    android:textColorHint="@color/white" />

<TextView
    android:id="@+id/endDate_et"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_below="@+id/startDate_et"
    android:layout_marginTop="10dp"
    android:background="@drawable/round_field"
    android:hint="End Date/Time"
    android:padding="10dp"
    android:textColor="@color/white"
    android:textColorHint="@color/white" />

<Button
    android:id="@+id/create_event_btn"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_below="@+id/endDate_et"
    android:layout_marginTop="10dp"
    android:text="Create Event" />

【问题讨论】：

请显示你的xml
XML 没有问题（无论如何我都在更新问题）....当我在 onClick 中执行其他操作时，它工作正常。并且 DatePickerDialog 没有 XML
请更新完整的xml
检查更新@vishaljangid
请更新您的班级并发布您调用日期选择器的完整代码。

标签： android android-datepicker

【解决方案1】：

这是java类文件

TextView startDateEt;

                @Override
                protected void onCreate(Bundle savedInstanceState) {
                    super.onCreate(savedInstanceState);
                    setContentView(R.layout.activity_main);

                    startDateEt=(TextView) findViewById(R.id.startDate_et);
                    startDateEt.setOnClickListener(this);  
    }     
            @Override
                public void onClick(View view) {
                    if (view.getId() == R.id.startDate_et) {
                        final java.util.Calendar c = java.util.Calendar.getInstance();
                        int mYear = c.get(java.util.Calendar.YEAR);
                        int mMonth = c.get(java.util.Calendar.MONTH);
                        int mDay = c.get(java.util.Calendar.DAY_OF_MONTH);
                        DatePickerDialog datePickerDialog = new DatePickerDialog(this,
                                new DatePickerDialog.OnDateSetListener() {
                                    @Override
                                    public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
                                        startDateEt.setText(dayOfMonth + "-" + (monthOfYear + 1) + "-" + year);
                                    }
                                }, mYear, mMonth, mDay);
                        datePickerDialog.show();
                    }
                }

这是xml文件

    <EditText
            android:id="@+id/eventTitle_et"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp"
            android:hint="Event Title" />

    <EditText
            android:id="@+id/description_et"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@+id/eventTitle_et"
            android:layout_marginTop="10dp"
            android:hint="Description" />

    <TextView
            android:id="@+id/startDate_et"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@+id/description_et"
            android:layout_marginTop="10dp"
            android:hint="Start Date/Time"
            android:padding="10dp"

           />

    <TextView
            android:id="@+id/endDate_et"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@+id/startDate_et"
            android:layout_marginTop="10dp"
            android:hint="End Date/Time"
            android:padding="10dp"
            />

    <Button
            android:id="@+id/create_event_btn"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_below="@+id/endDate_et"
            android:layout_marginTop="10dp"
            android:text="Create Event" />
    </RelativeLayout>

【讨论】：

我在另一个项目中尝试过完全相同的代码，效果很好
这是第一件事，先生

【解决方案2】：

我知道这个问题很老了，但为了任何从 Google 来到这里的人的利益：

我在我的 API 21 模拟器上得到了这个确切的 InflateException（行号和所有内容），但在我的 API 26 模拟器上没有。从this similar question 上的答案中尝试一些事情导致我在 DatePickerDialog 上设置标题，这阻止了它崩溃

    DatePickerDialog datePickerDialog = new DatePickerDialog(this,
        new DatePickerDialog.OnDateSetListener() {
            @Override
            public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
                 startDateEt.setText(dayOfMonth + "-" + (monthOfYear + 1) + "-" + year);
            }
    }, mYear, mMonth, mDay);
    datePickerDialog.setTitle(""); //ADDED THIS LINE
    datePickerDialog.show();

【讨论】：