如何在数据交换中设置从当前日期起最多7天的日期？
我希望将最长日期设置为从当前日期起的7天
public void showDateTimePicker() {
final Calendar currentDate = Calendar.getInstance();
Calendar calendar = Calendar.getInstance();
DatePickerDialog datePickerDialog = new DatePickerDialog(context, new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
}, currentDate.get(Calendar.HOUR_OF_DAY), currentDate.get(Calendar.MINUTE), false).show();
}
}, currentDate.get(Calendar.YEAR), currentDate.get(Calendar.MONTH), currentDate.get(Calendar.DATE));
datePickerDialog.getDatePicker().setMinDate(System.currentTimeMillis());
datePickerDialog.getDatePicker().setMaxDate((System.currentTimeMillis() - 1000) + (1000*60*60*24*7));
datePickerDialog.show();
}如果我按上述方法运行，应用程序会在超过几个月时崩溃。我怎样才能做到这一点？坠机情况如下：
android.widget.SimpleMonthView.getMonthHeight()‘：尝试在android.widget.DayPickerView.onLayout(DayPickerView.java:232) at android.view.View.layout(View.java:22844)、android.view.ViewGroup.layout(ViewGroup.java:6389) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332)、android.widget.FrameLayout.onLayout(FrameLayout.java:270) at android.view.View.layout(View.java:22844)的空对象引用上调用虚拟方法'int java.lang.NullPointerExceptionandroid.widget.FrameLayout.layoutChildren(FrameLayout.java:332) at android.widget.FrameLayout.onLayout(FrameLayout.java:270) at android.widget.ScrollView.onLayout(ScrollView.java:1660) at android.view.View.layout(View.java:22844) android.view.ViewGroup.layout(ViewGroup.java:6389) at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1829) at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1673) at android.widget.LinearLayout.onLayout(LinearLayout.java:1582) at android.view.View.layout(View.java:22844) at android.view.ViewGroup.layout(ViewGroup.java:6389) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332) at android.widget.FrameLayout.onLayout(FrameLayout.java:270) at android.view.View.layout(View.java:22844) android.view.ViewGroup.layout(ViewGroup.java:6389) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332) at android.widget.FrameLayout.onLayout(FrameLayout.java:270) at android.view.View.layout(View.java:22844) at android.view.ViewGroup.layout(ViewGroup.java:6389) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332) at android.widget.FrameLayout.onLayout(FrameLayout.java:270) at android.view.View.layout(View.java:22844) at android.view.ViewGroup.layout(ViewGroup.java:6389) at com.android.internal.widget.AlertDialogLayout.setChildFrame(AlertDialogLayout.java：( com.android.internal.widget.AlertDialogLayout.onLayout(AlertDialogLayout.java:351) at android.view.View.layout(View.java:22844) at android.view.ViewGroup.layout(ViewGroup.java:6389) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332) at android.widget.FrameLayout.onLayout(FrameLayout.java:270) at android.view.View.layout(View.java:22844) at android.view.ViewGroup.layout(ViewGroup.java:6389) at android.widget.FrameLayout.layoutChildren)android.widget.FrameLayout.onLayout(FrameLayout.java:270) at android.view.View.layout(View.java:22844) at android.view.ViewGroup.layout(ViewGroup.java:6389) at android.widget.FrameLayout.layoutChildren(FrameLayout.java:332) at android.widget.FrameLayout.onLayout(FrameLayout.java:270) at com.android.internal.policy.DecorView.onLayout(DecorView.java:784) at android.view.View.layout(View.java:22844) at android.view。android.view.ViewRootImpl.performLayout(ViewRootImpl.java:3470)，android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2938)，android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1952)，android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:8171)，android.view.Choreographer$CallbackRecord.run(Choreographer.java:972)，android.view.Choreographer.doCallbacks(Choreographer.java:796)，android.view.Choreographer.doFrame(Choreographer.java:731)，android.view。Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:957) at android.os.Handler.handleCallback(Handler.java:938) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:223) at android.app.ActivityThread.main(ActivityThread.java:7656) at java.lang.reflect.Method.invoke(原生方法)在com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
回答 1
Stack Overflow用户
发布于 2022-03-07 12:44:51
试着第一步-
class MainActivity : AppCompatActivity() {
@SuppressLint("SetTextI18n")
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
val button: AppCompatButton = findViewById(R.id.click)
button.setOnClickListener {
val mYear: Int
val mMonth: Int
val mDay: Int
val c = Calendar.getInstance()
mYear = c[Calendar.YEAR]
mMonth = c[Calendar.MONTH]
mDay = c[Calendar.DAY_OF_MONTH]
val datePickerDialog = DatePickerDialog(
this,
{ _, year, monthOfYear, dayOfMonth ->
button.text = dayOfMonth.toString() + "-" + (monthOfYear + 1) + "-" + year
},
mYear,
mMonth,
mDay
)
datePickerDialog.datePicker.minDate =
c.timeInMillis
datePickerDialog.datePicker.maxDate =
((c.timeInMillis) + ((1000 * 60 * 60 * 24 * 7)))
datePickerDialog.show()
}
}}
步骤2- activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.appcompat.widget.LinearLayoutCompat xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<androidx.appcompat.widget.AppCompatButton
android:id="@+id/click"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="TEST" />
</androidx.appcompat.widget.LinearLayoutCompat>https://stackoverflow.com/questions/71380878
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