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POActivity launches successfully as a main activity,but app chrashes when it is started via button click
 

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  1. POActivity launches successfully as a main activity,but app chrashes when it is started via button click
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    <p>Iam trying to launch "<strong>CalendarView.class</strong>" via button click event in <strong>"ManagerDashboard.class"</strong>, But app crashes during button click. <strong>CalendarView.class</strong> launches successfully if i make it as main activity in manifest. </p> <p>I tried to browse the similar questions but did not find the answer that iam looking for.</p> <p>Logcat output:</p> <pre><code>09-09 09:54:02.496: E/AndroidRuntime(1645): FATAL EXCEPTION: main 09-09 09:54:02.496: E/AndroidRuntime(1645): android.content.ActivityNotFoundException: Unable to find explicit activity class {com.demi.attendance/android.widget.CalendarView}; have you declared this activity in your AndroidManifest.xml? 09-09 09:54:02.496: E/AndroidRuntime(1645): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1618) 09-09 09:54:02.496: E/AndroidRuntime(1645): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1417) 09-09 09:54:02.496: E/AndroidRuntime(1645): at android.app.Activity.startActivityForResult(Activity.java:3370) 09-09 09:54:02.496: E/AndroidRuntime(1645): at android.app.Activity.startActivityForResult(Activity.java:3331) 09-09 09:54:02.496: E/AndroidRuntime(1645): at android.app.Activity.startActivity(Activity.java:3566) 09-09 09:54:02.496: E/AndroidRuntime(1645): at android.app.Activity.startActivity(Activity.java:3534) 09-09 09:54:02.496: E/AndroidRuntime(1645): at com.demi.manager.ManagerDashboard$1.onClick(ManagerDashboard.java:42) 09-09 09:54:02.496: E/AndroidRuntime(1645): at android.view.View.performClick(View.java:4204) 09-09 09:54:02.496: E/AndroidRuntime(1645): at android.view.View$PerformClick.run(View.java:17355) 09-09 09:54:02.496: E/AndroidRuntime(1645): at android.os.Handler.handleCallback(Handler.java:725) 09-09 09:54:02.496: E/AndroidRuntime(1645): at android.os.Handler.dispatchMessage(Handler.java:92) 09-09 09:54:02.496: E/AndroidRuntime(1645): at android.os.Looper.loop(Looper.java:137) 09-09 09:54:02.496: E/AndroidRuntime(1645): at android.app.ActivityThread.main(ActivityThread.java:5041) 09-09 09:54:02.496: E/AndroidRuntime(1645): at java.lang.reflect.Method.invokeNative(Native Method) 09-09 09:54:02.496: E/AndroidRuntime(1645): at java.lang.reflect.Method.invoke(Method.java:511) 09-09 09:54:02.496: E/AndroidRuntime(1645): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 09-09 09:54:02.496: E/AndroidRuntime(1645): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 09-09 09:54:02.496: E/AndroidRuntime(1645): at dalvik.system.NativeStart.main(Native Method) 09-09 10:21:59.325: E/Trace(2139): error opening trace file: No such file or directory (2) </code></pre> <p>Manifest:</p> <pre><code> &lt;application android:allowBackup="true" android:icon="@drawable/mainicon" android:label="@string/app_name" android:theme="@style/AppTheme" android:uiOptions="splitActionBarWhenNarrow" android:vmSafeMode="true" &gt; &lt;activity android:name="com.demi.manager.ManagerDashboard" android:configChanges="orientation" android:screenOrientation="portrait" &gt; &lt;intent-filter&gt; &lt;action android:name="android.intent.action.MAIN" /&gt; &lt;category android:name="android.intent.category.LAUNCHER" /&gt; &lt;/intent-filter&gt; &lt;/activity&gt; &lt;activity android:name="com.demi.calendar.CalendarView" android:configChanges="orientation" android:screenOrientation="portrait" &gt; &lt;/activity&gt; &lt;/application&gt; </code></pre> <p>CalendarView.java</p> <pre><code> package com.demi.calendar; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.GregorianCalendar; import java.util.Locale; import android.app.Activity; import android.graphics.Color; import android.os.Bundle; import android.os.Handler; import android.util.Log; import android.view.View; import android.view.View.OnClickListener; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.GridView; import android.widget.LinearLayout; import android.widget.RelativeLayout; import android.widget.TextView; import android.widget.Toast; import com.demi.attendance.R; public class CalendarView extends Activity { public GregorianCalendar month, itemmonth;// calendar instances. public CalendarAdapter adapter;// adapter instance public Handler handler;// for grabbing some event values for showing the dot // marker. public ArrayList&lt;String&gt; items; // container to store calendar items which // needs showing the event marker ArrayList&lt;String&gt; event; LinearLayout rLayout; ArrayList&lt;String&gt; date; ArrayList&lt;String&gt; desc; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.calendar); Locale.setDefault(Locale.US); rLayout = (LinearLayout) findViewById(R.id.text); month = (GregorianCalendar) GregorianCalendar.getInstance(); //itemmonth = (GregorianCalendar) month.clone(); items = new ArrayList&lt;String&gt;(); adapter = new CalendarAdapter(this, month); GridView gridview = (GridView) findViewById(R.id.gridview); gridview.setAdapter(adapter); handler = new Handler(); handler.post(calendarUpdater); TextView title = (TextView) findViewById(R.id.title); title.setText(android.text.format.DateFormat.format("MMMM yyyy", month)); RelativeLayout previous = (RelativeLayout) findViewById(R.id.previous); previous.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { setPreviousMonth(); refreshCalendar(); } }); RelativeLayout next = (RelativeLayout) findViewById(R.id.next); next.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { setNextMonth(); refreshCalendar(); } }); gridview.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView&lt;?&gt; parent, View v, int position, long id) { // removing the previous view if added if (((LinearLayout) rLayout).getChildCount() &gt; 0) { ((LinearLayout) rLayout).removeAllViews(); } desc = new ArrayList&lt;String&gt;(); date = new ArrayList&lt;String&gt;(); ((CalendarAdapter) parent.getAdapter()).setSelected(v); String selectedGridDate = CalendarAdapter.dayString .get(position); String[] separatedTime = selectedGridDate.split("-"); String gridvalueString = separatedTime[2].replaceFirst("^0*", "");// taking last part of date. ie; 2 from 2012-12-02. int gridvalue = Integer.parseInt(gridvalueString); // navigate to next or previous month on clicking offdays. if ((gridvalue &gt; 10) &amp;&amp; (position &lt; 8)) { setPreviousMonth(); refreshCalendar(); } else if ((gridvalue &lt; 7) &amp;&amp; (position &gt; 28)) { setNextMonth(); refreshCalendar(); } ((CalendarAdapter) parent.getAdapter()).setSelected(v); for (int i = 0; i &lt; Utility.startDates.size(); i++) { if (Utility.startDates.get(i).equals(selectedGridDate)) { desc.add(Utility.nameOfEvent.get(i)); } } if (desc.size() &gt; 0) { for (int i = 0; i &lt; desc.size(); i++) { TextView rowTextView = new TextView(CalendarView.this); // set some properties of rowTextView or something rowTextView.setText("Event:" + desc.get(i)); rowTextView.setTextColor(Color.BLACK); // add the textview to the linearlayout rLayout.addView(rowTextView); } } desc = null; } }); } protected void setNextMonth() { if (month.get(GregorianCalendar.MONTH) == month .getActualMaximum(GregorianCalendar.MONTH)) { month.set((month.get(GregorianCalendar.YEAR) + 1), month.getActualMinimum(GregorianCalendar.MONTH), 1); } else { month.set(GregorianCalendar.MONTH, month.get(GregorianCalendar.MONTH) + 1); } } protected void setPreviousMonth() { if (month.get(GregorianCalendar.MONTH) == month .getActualMinimum(GregorianCalendar.MONTH)) { month.set((month.get(GregorianCalendar.YEAR) - 1), month.getActualMaximum(GregorianCalendar.MONTH), 1); } else { month.set(GregorianCalendar.MONTH, month.get(GregorianCalendar.MONTH) - 1); } } protected void showToast(String string) { Toast.makeText(this, string, Toast.LENGTH_SHORT).show(); } public void refreshCalendar() { TextView title = (TextView) findViewById(R.id.title); adapter.refreshDays(); adapter.notifyDataSetChanged(); handler.post(calendarUpdater); // generate some calendar items title.setText(android.text.format.DateFormat.format("MMMM yyyy", month)); } public Runnable calendarUpdater = new Runnable() { @Override public void run() { items.clear(); // Print dates of the current week DateFormat df = new SimpleDateFormat("yyyy-MM-dd", Locale.US); String itemvalue; /// = Utility.readCalendarEvent(CalendarView.this); //Log.d("=====Event====", event.toString()); Log.d("=====Date ARRAY====", Utility.startDates.toString()); /*for (int i = 0; i &lt; Utility.startDates.size(); i++) { itemvalue = df.format(itemmonth.getTime()); itemmonth.add(GregorianCalendar.DATE, 1); items.add(Utility.startDates.get(i).toString()); }*/ adapter.setItems(items); adapter.notifyDataSetChanged(); } }; } </code></pre> <p>ManagerDashboard.java</p> <pre><code> public class ManagerDashboard extends Activity { Button create_project, view_project; Button take_attendance, view_attendance; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.manager_dashboard); init(); setListener(); } void init() { take_attendance = (Button) findViewById(R.id.manager_dashboard_button1); view_attendance = (Button) findViewById(R.id.manager_dashboard_button2); create_project = (Button) findViewById(R.id.manager_dashboard_button3); view_project = (Button) findViewById(R.id.manager_dashboard_button4); } void setListener() { take_attendance.setOnClickListener(new OnClickListener() { @SuppressLint("NewApi") public void onClick(View v) { ; Intent intent=new Intent(getApplicationContext(),CalendarView.class); //app crashes from here startActivity(intent); } }); view_attendance.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent intent=new Intent(ManagerDashboard.this,ViewAttendance.class); startActivity(intent); } }); create_project.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent intent=new Intent(ManagerDashboard.this,CreateProject.class); startActivity(intent); } }); view_project.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent intent=new Intent(ManagerDashboard.this,ViewProject.class); startActivity(intent); } }); } } </code></pre>
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    1. USMadhav Bhattarai
    1. USMadhav Bhattarai
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      1. POActivity launches successfully as a main activity,but app chrashes when it is started via button click
      1. USMadhav Bhattarai
      1. VTFavorite
    2. VO
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      1. This table or related slice is empty.
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    1. COThis is an import issue, as you can see in the error. (also, giving names to your classes that are already used by the framework is quite error prone)
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      1. POActivity launches successfully as a main activity,but app chrashes when it is started via button click
      1. USnjzk2
    2. COAnd yet you still didnt know why its crashing?
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      1. POActivity launches successfully as a main activity,but app chrashes when it is started via button click
      1. USuser755
    3. COyou calendar view name clashing with native calender widget..?
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      1. POActivity launches successfully as a main activity,but app chrashes when it is started via button click
      1. USuser755
 

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