從教程實施的Android TimePicker - 源極加載關閉

我想實現一個TimePicker到從下面的教程我的源代碼：在我的應用程序執行時，它從教程實施的Android TimePicker - 源極加載關閉

http://www.lukehorvat.com/blog/android-time-picker-example/

但是 - 我越來越迫切關注問題。

有什麼建議嗎？

JAVA: 

import android.app.Activity; 
import android.app.AlertDialog; 
import android.os.AsyncTask; 
import android.os.Bundle; 
import android.view.ViewGroup; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.FrameLayout; 
import android.widget.TimePicker; 
import android.os.Bundle; 
import android.support.v4.app.DialogFragment; 
import android.support.v4.app.FragmentActivity; 
import android.text.format.DateFormat; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.TextView; 
import android.app.Activity; 
import android.app.Dialog; 
import android.app.TimePickerDialog; 
import android.os.Bundle; 
import android.support.v4.app.DialogFragment; 
import android.text.format.DateFormat; 
import android.widget.TimePicker; 

import com.nfc.linkingmanager.TimePickerFragment.TimePickedListener; 

import java.util.Calendar; 

public class AddEditCountry extends Activity implements TimePickedListener 
{ 
    private TextView mPickedTimeText; 
    private Button mPickTimeButton; 
    private long rowID; 
    private EditText nameEt; 
    private EditText capEt; 
    private EditText codeEt; 
    private TimePicker timeEt; 
    public static final String KEY_BUNDLE_TIME = "time"; 
    public static final String KEY_BUNDLE_MIN = "min"; 

    @Override 
    public void onCreate(Bundle savedInstanceState) 
    { 




      nameEt = (EditText) findViewById(R.id.nameEdit); 
      capEt = (EditText) findViewById(R.id.capEdit); 
      codeEt = (EditText) findViewById(R.id.codeEdit); 
      timeEt = (TimePicker) findViewById(R.id.timeEdit); 



      Bundle extras = getIntent().getExtras(); 

      if (extras != null) 
      { 
      rowID = extras.getLong("row_id"); 
      nameEt.setText(extras.getString("name")); 
      capEt.setText(extras.getString("cap")); 
      codeEt.setText(extras.getString("code")); 
      timeEt.setCurrentHour(extras.containsKey(KEY_BUNDLE_TIME) ? extras.getInt(KEY_BUNDLE_TIME) : 0); 
      } 

      Button saveButton =(Button) findViewById(R.id.saveBtn); 
      saveButton.setOnClickListener(new OnClickListener() { 

       public void onClick(View v) 
       { 
       if (nameEt.getText().length() != 0) 
       { 
        AsyncTask<Object, Object, Object> saveContactTask = 
         new AsyncTask<Object, Object, Object>() 
         { 
          @Override 
          protected Object doInBackground(Object... params) 
          { 
          saveContact(); 
          return null; 
          } 

          @Override 
          protected void onPostExecute(Object result) 
          { 
          finish(); 
          } 
         }; 

        saveContactTask.execute((Object[]) null); 
       } 

       else 
       { 
        AlertDialog.Builder alert = new AlertDialog.Builder(AddEditCountry.this); 
        alert.setTitle(R.string.errorTitle); 
        alert.setMessage(R.string.errorMessage); 
        alert.setPositiveButton(R.string.errorButton, null); 
        alert.show(); 
       } 
       } 
     }); 
     } 


      private void saveContact() 
      { 
       DatabaseConnector dbConnector = new DatabaseConnector(this); 

       if (getIntent().getExtras() == null) 
       { 
        dbConnector.insertContact(nameEt.getText().toString(), 
          capEt.getText().toString(), 
          timeEt.getCurrentHour().toString(), 
          codeEt.getText().toString()); 

       } 
       else 
       { 
       dbConnector.updateContact(rowID, 
        nameEt.getText().toString(), 
        capEt.getText().toString(), 
        timeEt.getCurrentHour().toString(),     
        codeEt.getText().toString()); 
       } 
      } 


     @Override 
     public void onTimePicked(Calendar time) 
     { 
      // display the selected time in the TextView 
      mPickedTimeText.setText(DateFormat.format("h:mm a", time)); 
     } 
}

ADD COUNTRY XML：

<?xml version="1.0" encoding="utf-8"?> 
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" android:layout_weight="1"> 

    <LinearLayout android:id="@+id/linearLayout" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:orientation="vertical" 
     android:padding="5dp"> 

     <EditText android:id="@+id/nameEdit" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:imeOptions="actionNext" 
     android:hint="@string/name_hint" 
     android:inputType="textPersonName|textCapWords"/> 

     <EditText android:id="@+id/capEdit" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:imeOptions="actionNext" 
     android:hint="@string/cap_hint" 
     android:inputType="textPersonName|textCapWords"/> 

    <TextView 
     android:id="@+id/textView3" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Data Limit" 
     android:textColor="#ffffff" 
     android:textAppearance="?android:textAppearanceMedium" /> 

    <SeekBar 
     android:id="@+id/seekBar1" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" /> 

    <LinearLayout 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:orientation="horizontal" > 

     <TextView 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_weight="1.0" 
      android:gravity="left" 
      android:textColor="#ffffff" 
      android:text="10MB" /> 

     <TextView 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_weight="1.0" 
      android:gravity="right" 
      android:textColor="#ffffff" 
      android:text="Unlimited Data" /> 
    </LinearLayout> 

    <TextView 
     android:id="@+id/textView3" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="Bandwidth Limit" 
     android:textColor="#ffffff" 
     android:textAppearance="?android:textAppearanceMedium" /> 

    <SeekBar 
     android:id="@+id/seekBar1" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" /> 

    <LinearLayout 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:orientation="horizontal" > 

     <TextView 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_weight="1.0" 
      android:gravity="left" 
      android:textColor="#ffffff" 
      android:text="10kbs" /> 

     <TextView 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_weight="1.0" 
      android:textColor="#ffffff" 
      android:gravity="right" 
      android:text="Unlimited Bandwidth" /> 
    </LinearLayout> 

    <TextView 
     android:id="@+id/TextView02" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:textAppearance="?android:textAppearanceSmall" /> 

    <TextView 
     android:id="@+id/TextView02" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="WiFi Time Limit" 
     android:textColor="#ffffff" 
     android:textAppearance="?android:textAppearanceMedium" /> 


    <TextView 
     android:id="@+id/text_picked_time" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_centerHorizontal="true" 
     android:layout_centerVertical="true" /> 

    <Button 
     android:id="@+id/button_pick_time" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_centerHorizontal="true" 
     android:layout_centerVertical="true" 
     android:layout_below="@id/text_picked_time" 
     android:text="Pick a time" /> 

    <EditText 
     android:id="@+id/codeEdit" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:ems="10" 
     android:hint="@string/code_hint" 
     android:imeOptions="actionNext" 
     android:inputType="textUri" 
     android:lines="1" > 

     <requestFocus /> 
    </EditText> 

     <Button android:id="@+id/saveBtn" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_marginTop="15dp" 
     android:layout_gravity="center_horizontal" 
     android:text="@string/save_btn"/> 
    </LinearLayout> 
</ScrollView>

TIMEPICKERFRAGMENT.JAVA

package com.nfc.linkingmanager; 


import android.app.Activity; 
import android.app.Dialog; 
import android.app.TimePickerDialog; 
import android.os.Bundle; 
import android.support.v4.app.DialogFragment; 
import android.text.format.DateFormat; 
import android.widget.TimePicker; 

import java.util.Calendar; 

public class TimePickerFragment extends DialogFragment implements TimePickerDialog.OnTimeSetListener 
{ 
    private TimePickedListener mListener; 

    @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); 

     // create a new instance of TimePickerDialog and return it 
     return new TimePickerDialog(getActivity(), this, hour, minute, DateFormat.is24HourFormat(getActivity())); 
    } 

    @Override 
    public void onAttach(Activity activity) 
    { 
     // when the fragment is initially shown (i.e. attached to the activity), cast the activity to the callback interface type 
     super.onAttach(activity); 
     try 
     { 
      mListener = (TimePickedListener) activity; 
     } 
     catch (ClassCastException e) 
     { 
      throw new ClassCastException(activity.toString() + " must implement " + TimePickedListener.class.getName()); 
     } 
    } 

    @Override 
    public void onTimeSet(TimePicker view, int hourOfDay, int minute) 
    { 
     // when the time is selected, send it to the activity via its callback interface method 
     Calendar c = Calendar.getInstance(); 
     c.set(Calendar.HOUR_OF_DAY, hourOfDay); 
     c.set(Calendar.MINUTE, minute); 

     mListener.onTimePicked(c); 
    } 

    public static interface TimePickedListener 
    { 
     public void onTimePicked(Calendar time); 
    } 
}

logcat的：

03-25 02:50:06.783: I/Adreno200-EGLSUB(27045): <ConfigWindowMatch:2165>: Format RGBA_8888. 
03-25 02:50:06.783: D/memalloc(27045): ion: Mapped buffer base:0x5ca43000 size:614400 offset:0 fd:57 
03-25 02:50:06.783: E/(27045): Can't open file for reading 
03-25 02:50:06.783: E/(27045): Can't open file for reading 
03-25 02:50:06.823: D/memalloc(27045): ion: Mapped buffer base:0x5d234000 size:614400 offset:0 fd:61 
03-25 02:50:08.695: D/Activity(27045): Activity.onPause(), editTextTapSensorList size: 0 
03-25 02:50:08.715: W/dalvikvm(27045): threadid=1: thread exiting with uncaught exception (group=0x4108b9d8) 
03-25 02:50:08.715: E/AndroidRuntime(27045): FATAL EXCEPTION: main 
03-25 02:50:08.715: E/AndroidRuntime(27045): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.nfc.linkingmanager/com.nfc.linkingmanager.AddEditCountry}: java.lang.NullPointerException 
03-25 02:50:08.715: E/AndroidRuntime(27045): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1960) 
03-25 02:50:08.715: E/AndroidRuntime(27045): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1985) 
03-25 02:50:08.715: E/AndroidRuntime(27045): at android.app.ActivityThread.access$600(ActivityThread.java:127) 
03-25 02:50:08.715: E/AndroidRuntime(27045): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1151) 
03-25 02:50:08.715: E/AndroidRuntime(27045): at android.os.Handler.dispatchMessage(Handler.java:99) 
03-25 02:50:08.715: E/AndroidRuntime(27045): at android.os.Looper.loop(Looper.java:137) 
03-25 02:50:08.715: E/AndroidRuntime(27045): at android.app.ActivityThread.main(ActivityThread.java:4477) 
03-25 02:50:08.715: E/AndroidRuntime(27045): at java.lang.reflect.Method.invokeNative(Native Method) 
03-25 02:50:08.715: E/AndroidRuntime(27045): at java.lang.reflect.Method.invoke(Method.java:511) 
03-25 02:50:08.715: E/AndroidRuntime(27045): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:788) 
03-25 02:50:08.715: E/AndroidRuntime(27045): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:555) 
03-25 02:50:08.715: E/AndroidRuntime(27045): at dalvik.system.NativeStart.main(Native Method) 
03-25 02:50:08.715: E/AndroidRuntime(27045): Caused by: java.lang.NullPointerException 
03-25 02:50:08.715: E/AndroidRuntime(27045): at com.nfc.linkingmanager.AddEditCountry.onCreate(AddEditCountry.java:73) 
03-25 02:50:08.715: E/AndroidRuntime(27045): at android.app.Activity.performCreate(Activity.java:4701) 
03-25 02:50:08.715: E/AndroidRuntime(27045): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1051) 
03-25 02:50:08.715: E/AndroidRuntime(27045): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1924) 
03-25 02:50:08.715: E/AndroidRuntime(27045): ... 11 more

來源

2013-03-25 NoobNinja

請張貼的logcat，和代碼，而不是它 – 2013-03-25 06:53:25

整整一面牆我認爲ü忘了從佈局 – 2013-03-25 06:57:58

次訪問之前調用''爲活動AddEditCountry'我setContentView'天衣ü忘了給FindViewById的相關部分這個mPickedTimeText TextView – user1835052 2013-03-25 07:03:15

您的xml中沒有名爲TimeEdit的元素。所以當你嘗試設置它的文本時，它會因空指針異常而崩潰。

來源

2013-03-25 06:55:40

另外，你有幾個具有相同名稱的元素 - 如果你想要找到這些元素，你總會發現第一個元素，其餘元素將無法使用。 – 2013-03-25 06:56:50

你定義Timepicker

timeEt = (TimePicker) findViewById(R.id.timeEdit);

在XML文件中。檢查你的XML文件，並給所有人不同的ID。

來源

2013-03-25 06:57:26 kyogs

從教程實施的Android TimePicker - 源極加載關閉

回答

相關問題