小编Rag*_*dan的帖子

在我的页面代码中，有以下脚本标记：

<script>
  var oid = "182384";
  document.getElementById('container').innerHTML = oGrid;
  oGrid.setShowSid(false);
  oGrid.calcSize();
  setupAllTabs();
  var toolbar = setupMenuButtons("btnbar");

  initForm(toolbar);
</script>

我如何获得与瓦特尔或红宝石的oid值？

当我尝试启动App时,我得到了一个N​​PE.我不知道是什么原因造成的.应用程序应在网站上显示地图.然后,用户可以轻松地将他的位置键入edittext并将其提交到网页.这是我的代码:

package com.timbremer.iimv;

import android.content.Context;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.os.Build;
import android.view.inputmethod.InputMethodManager;
import android.webkit.CookieManager;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends ActionBarActivity {

private WebView wv;
private EditText etlocation;
private Button btclose;
private Button btgo;
private boolean send;

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

    send = false;


    etlocation = (EditText) findViewById(R.id.etlocation);
    btgo.setOnClickListener(new View.OnClickListener() {

        private String location;


        @Override …

我想制作一个程序,告诉我按住按钮的秒数.

例如,如果我点击按钮5秒钟,它应该告诉我按钮保持按下5秒钟.

这在Android中是否可以实现？

这就是我尝试的方式,没有用,因为当我把while循环放入时,按钮保持点击状态,即使按下它只需一秒钟.该程序没有崩溃,但按钮仍然被点击,我认为它冻结了.

 thread = new HandlerThread("");



    btn.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            while(btn.isPressed())
            {

                try {
                    thread.sleep(1000);
                    total = total++;
                    temp = temp++;
                } catch (InterruptedException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
            Toast.makeText(MainActivity.this, ""+temp+" "+total, 0).show();


        }
    });

当我尝试在片段类中为Notificatoin Manager分配值时,我有Null Pointer Exception.

    private NotificationManager m_notificationMgr;

public void CreateNotification() {
    Log.d(TAG, "created");

    m_stopwatch = new Stopwatch();
    m_notificationMgr = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);//null pointer exception

    createNotification();
    Log.d(TAG, "ok");
}

错误日志

05-15 12:31:16.127: E/AndroidRuntime(2216): FATAL EXCEPTION: main
05-15 12:31:16.127: E/AndroidRuntime(2216): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.timetracker/com.example.timetracker.MainActivity}: java.lang.NullPointerException
05-15 12:31:16.127: E/AndroidRuntime(2216):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
05-15 12:31:16.127: E/AndroidRuntime(2216):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
05-15 12:31:16.127: E/AndroidRuntime(2216):     at android.app.ActivityThread.access$600(ActivityThread.java:141)
05-15 12:31:16.127: E/AndroidRuntime(2216):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
05-15 12:31:16.127: E/AndroidRuntime(2216):     at android.os.Handler.dispatchMessage(Handler.java:99)
05-15 12:31:16.127: E/AndroidRuntime(2216):     at android.os.Looper.loop(Looper.java:137)
05-15 12:31:16.127: E/AndroidRuntime(2216):     at android.app.ActivityThread.main(ActivityThread.java:5103)
05-15 12:31:16.127: …

当我改变方向并滑动时,它会崩溃.这是我的原木猫

11-01 11:21:19.715: E/AndroidRuntime(4336): FATAL EXCEPTION: main 
11-01 11:21:19.715: E/AndroidRuntime(4336): java.lang.NullPointerException
11-01 11:21:19.715: E/AndroidRuntime(4336):     at com.example.saisuke.CalendarAdapter.<init>(CalendarAdapter.java:33)
11-01 11:21:19.715: E/AndroidRuntime(4336):     at com.example.saisuke.MonthFragment.updateCurrentMonth(MonthFragment.java:161) 
11-01 11:21:19.715: E/AndroidRuntime(4336):     at com.example.saisuke.MonthFragment.onNextMonth(MonthFragment.java:177)
11-01 11:21:19.715: E/AndroidRuntime(4336):     at com.example.saisuke.Saisuke$1.onPageScrollStateChanged(Saisuke.java:107) 
11-01 11:21:19.715: E/AndroidRuntime(4336):     at android.support.v4.view.ViewPager.setScrollState(ViewPager.java:398)
11-01 11:21:19.715: E/AndroidRuntime(4336):     at android.support.v4.view.ViewPager.access$000(ViewPager.java:84) 
11-01 11:21:19.715: E/AndroidRuntime(4336):     at android.support.v4.view.ViewPager$3.run(ViewPager.java:243) 
11-01 11:21:19.715: E/AndroidRuntime(4336):     at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
11-01 11:21:19.715: E/AndroidRuntime(4336):     at android.view.Choreographer.doCallbacks(Choreographer.java:555) 
11-01 11:21:19.715: E/AndroidRuntime(4336):     at android.view.Choreographer.doFrame(Choreographer.java:524)
11-01 11:21:19.715: E/AndroidRuntime(4336):     at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
11-01 11:21:19.715: E/AndroidRuntime(4336):     at android.os.Handler.handleCallback(Handler.java:615) 
11-01 11:21:19.715: E/AndroidRuntime(4336):     at android.os.Handler.dispatchMessage(Handler.java:92) 11-01 
11:21:19.715: E/AndroidRuntime(4336):   at …

我的程序包含两个activity.i通过方法showevent调用第二个活动.但是发生错误,nullpointer异常.这是什么？我的程序包含两个activity.i通过方法showevent调用第二个活动.但是发生错误,nullpointer异常.为什么这个

FirstActivity.java

public class FirstActivity extends FragmentActivity implements OnItemSelectedListener {
    /** Called when the activity is first created. */
    public final static String EXTRA_MESSAGE = "com.example.myfirstapp.MESSAGE";
    public final static String EXTRA_MESSAGE1 = "com.example.myfirstapp.MESSAGE";


    classdbOpenHelper eventsData;
     TextView userSelection;
     Button okButton;
     Button addButton;

     Button change_date_but;
     TextView date;
     TextView show;
     EditText edittext; 
      public static final int Date_dialog_id = 1;
      private int mYear;
      private int mMonth;
      private int mDay;

    private static final String[] items={"Yalahanka","Rajaji nagar","Sivaji Nagar","Koramangala","RT Nagar", "Banashankari","Yashwanthpura","Hebbal"};



    @Override
    public void onCreate(Bundle savedInstanceState) { …

我有一个问题,我根本无法理解它!我有一个Asynctask连接到Web服务并下载一些数据.

但当我这样做时,我的其他人Asynctasks等待这个Asynctask to finish his work evenAsynctasks in otherActivities` !! 但我无法理解这一点.

我怎么能避免这个？我当时认为Asynctasks可以同时运行,但现在却没有!问题是什么？似乎REST和下载流数据会阻止整个应用程序.

将电子邮件参数发送到服务器时,响应显示为下面的字符串.

[
{
    "nid": "478",
    "field_mc_bacheliers_value": "0",
    "field_mc_defi_collectif_value": "1"
},
{
    "nid": "480",
    "field_mc_bacheliers_value": "0",
    "field_mc_defi_collectif_value": "1"    
}
]

我想把这个响应字符串格式读入jsonobject.我是第一次与json合作.