android - TimePicker 工作正常但不是 DatePicker

Question

SELECT TIME 按钮工作正常但 SELECT DATE 按钮显示错误“不幸的是应用程序已停止”..我发现 DatePickerFragment 的代码正确..plzz 帮助..这是调用提醒程序..

      public class MainActivity extends Activity {
    EditText text;
    EditText text2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        text = (EditText)findViewById(R.id.editText1);
        text2 = (EditText)findViewById(R.id.editText2);
        Button btn = (Button)findViewById(R.id.button3);

        btn.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
        // TODO Auto-generated method stub



        //User enters the number of seconds
        EditText text = (EditText) findViewById(R.id.editText1);
        int i = Integer.parseInt(text.getText().toString());
        //Creating a PendingIntent
        Intent intent = new Intent(MainActivity.this, MyBroadcastReceiver.class);
        PendingIntent pendingIntent = PendingIntent.getBroadcast(
        MainActivity.this, 234324243, intent, 0);
        //Creating an AlarmManager and <span id="IL_AD9" class="IL_AD">setting</span> the pendingIntent to him
        AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
        alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis()
        + (i * 1000), pendingIntent);


        }});





    }
public static class TimePickerFragment extends DialogFragment implements TimePickerDialog.OnTimeSetListener {

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current time as the default values for the picker
final Calendar c = Calendar.getInstance();
int hour = c.get(Calendar.HOUR_OF_DAY);
int minute = c.get(Calendar.MINUTE);
//long millis=c.getTimeInMillis();
// Create a new instance of TimePickerDialog and return it
return new TimePickerDialog(getActivity(), this, hour, minute,DateFormat.is24HourFormat(getActivity()));
}

public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
// Do something with the time chosen by the user
}
}
public void showTimePickerDialog(View v) {
    DialogFragment newFragment = new TimePickerFragment();
    newFragment.show(getFragmentManager(),"timePicker");
}
public static class DatePickerFragment extends DialogFragment implements DatePickerDialog.OnDateSetListener {

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// Use the current date as the default date in the picker
final Calendar c = Calendar.getInstance();
int year = c.get(Calendar.YEAR);
int month = c.get(Calendar.MONTH);
int day = c.get(Calendar.DAY_OF_MONTH);
//long millis=c.getTimeInMillis(); 
// Create a new instance of DatePickerDialog and return it
return new DatePickerDialog(getActivity(), this, year, month, day);
}

public void onDateSet(DatePicker view, int year, int month, int day) {
// Do something with the date chosen by the user
}
public void showDatePickerDialog(View v) {
    DialogFragment newFragment = new DatePickerFragment();
    newFragment.show(getFragmentManager(),"datePicker");
}
}

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

}

XML

   <RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_marginTop="28dp"
        android:layout_toLeftOf="@+id/editText1"
        android:text="NAME" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignRight="@+id/button2"
        android:layout_below="@+id/textView1"
        android:ems="10" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView1"
        android:layout_below="@+id/editText1"
        android:text="Phone" />

    <EditText
        android:id="@+id/editText2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textView2"
        android:layout_marginTop="14dp"
        android:layout_toRightOf="@+id/textView1"
        android:ems="10"
        android:inputType="phone" >

        <requestFocus />
    </EditText>

    <TextView
        android:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView2"
        android:layout_alignTop="@+id/button1"
        android:text="Set Reminder Time" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_centerVertical="true"
        android:layout_marginRight="16dp"
        android:onClick="showTimePickerDialog"
        android:text="Select Time" />

    <TextView
        android:id="@+id/textView4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView3"
        android:layout_below="@+id/button1"
        android:layout_marginTop="41dp"
        android:text="Set Reminder Date" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/button1"
        android:layout_below="@+id/textView4"
        android:onClick="showDatePickerDialog"
        android:text="Select Date" />

<Button
    android:id="@+id/button3"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@+id/button2"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="21dp"
    android:text="Submit" />

</RelativeLayout>

日志

05-04 15:37:11.585: D/dalvikvm(617): Not late-enabling CheckJNI (already on)
05-04 15:37:12.804: E/Trace(617): error opening trace file: No such file or directory (2)
05-04 15:37:14.124: D/gralloc_goldfish(617): Emulator without GPU emulation detected.
05-04 15:37:16.585: I/Choreographer(617): Skipped 62 frames!  The application may be doing too much work on its main thread.
05-04 15:37:16.895: I/Choreographer(617): Skipped 64 frames!  The application may be doing too much work on its main thread.
05-04 15:37:17.215: I/Choreographer(617): Skipped 31 frames!  The application may be doing too much work on its main thread.
05-04 15:37:19.295: I/Choreographer(617): Skipped 38 frames!  The application may be doing too much work on its main thread.
05-04 15:37:20.137: I/Choreographer(617): Skipped 114 frames!  The application may be doing too much work on its main thread.
05-04 15:37:21.254: D/AndroidRuntime(617): Shutting down VM
05-04 15:37:21.254: W/dalvikvm(617): threadid=1: thread exiting with uncaught exception (group=0x40a13300)
05-04 15:37:21.334: E/AndroidRuntime(617): FATAL EXCEPTION: main
05-04 15:37:21.334: E/AndroidRuntime(617): java.lang.IllegalStateException: Could not find a method showDatePickerDialog(View) in the activity class com.example.reminder4.MainActivity for onClick handler on view class android.widget.Button with id 'button2'
05-04 15:37:21.334: E/AndroidRuntime(617):  at android.view.View$1.onClick(View.java:3578)
05-04 15:37:21.334: E/AndroidRuntime(617):  at android.view.View.performClick(View.java:4084)
05-04 15:37:21.334: E/AndroidRuntime(617):  at android.view.View$PerformClick.run(View.java:16966)
05-04 15:37:21.334: E/AndroidRuntime(617):  at android.os.Handler.handleCallback(Handler.java:615)
05-04 15:37:21.334: E/AndroidRuntime(617):  at android.os.Handler.dispatchMessage(Handler.java:92)
05-04 15:37:21.334: E/AndroidRuntime(617):  at android.os.Looper.loop(Looper.java:137)
05-04 15:37:21.334: E/AndroidRuntime(617):  at android.app.ActivityThread.main(ActivityThread.java:4745)
05-04 15:37:21.334: E/AndroidRuntime(617):  at java.lang.reflect.Method.invokeNative(Native Method)
05-04 15:37:21.334: E/AndroidRuntime(617):  at java.lang.reflect.Method.invoke(Method.java:511)
05-04 15:37:21.334: E/AndroidRuntime(617):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
05-04 15:37:21.334: E/AndroidRuntime(617):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
05-04 15:37:21.334: E/AndroidRuntime(617):  at dalvik.system.NativeStart.main(Native Method)
05-04 15:37:21.334: E/AndroidRuntime(617): Caused by: java.lang.NoSuchMethodException: showDatePickerDialog [class android.view.View]
05-04 15:37:21.334: E/AndroidRuntime(617):  at java.lang.Class.getConstructorOrMethod(Class.java:460)
05-04 15:37:21.334: E/AndroidRuntime(617):  at java.lang.Class.getMethod(Class.java:915)
05-04 15:37:21.334: E/AndroidRuntime(617):  at android.view.View$1.onClick(View.java:3571)
05-04 15:37:21.334: E/AndroidRuntime(617):  ... 11 more
05-04 15:37:25.745: I/Process(617): Sending signal. PID: 617 SIG: 9

Answer 1

你把你的

public void showDatePickerDialog(View v) {
DialogFragment newFragment = new DatePickerFragment();
newFragment.show(getFragmentManager(),"datePicker");
}

在您的对话框 fragment 类中，但您在 mainActivity 布局中定义了您的 onclick 事件。Logcat 告诉您它的主类中没有 showDatePickerDialog 来提供您的点击事件