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POError when I want to create a listView from another listView
 

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  1. POError when I want to create a listView from another listView
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    <p>I have two classes. In the first class, ListDataActivityInterv, I want to display all the items from the class ListViewMultipleSelectionActivity. So I am in the first class, when I press the button Add I want to display a listView (the second class), to check one, two items and when I press send button to appear in the first class. Also I want to store this items selected in a table. Here is my code for the first class: </p> <pre><code>public class ListDataActivityInterv extends Activity{ private ListView lsInterventiiView = null; private PacientiDB pacientiDB = null; private PacientiAdapter adapter = null; private ArrayList&lt;Interventii&gt; listInterventii = null; private Button buttonCreate2 = null; private String text = null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.listviewinterventii); text = getIntent().getExtras().getString("Pacienti"); TextView textView1 = (TextView) findViewById(R.id.textView2); textView1.setText(text); buttonCreate2 = (Button) findViewById(R.id.btnCreateInt); buttonCreate2.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(ListDataActivityInterv.this, ListViewMultipleSelectionActivity.class); startActivity(intent); } }); Bundle b = getIntent().getExtras(); String[] resultArr = b.getStringArray("selectedItems"); ListView lv = (ListView) findViewById(R.id.lsvListInterventii); ArrayAdapter&lt;String&gt; adapter = new ArrayAdapter&lt;String&gt;(this, android.R.layout.simple_list_item_1, resultArr); lv.setAdapter(adapter); } } </code></pre> <p>The second class:</p> <pre><code>public class ListViewMultipleSelectionActivity extends Activity implements OnClickListener { Button button; ListView listView; ArrayAdapter&lt;String&gt; adapter; public String text = null; private PacientiDB pacientiDB = null; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.maincheckinterv); text = getIntent().getExtras().getString("Pacienti"); TextView text1 = (TextView) findViewById(R.id.textViewListInter); text1.setText(text); findViewsById(); String[] sports = getResources().getStringArray(R.array.sports_array); adapter = new ArrayAdapter&lt;String&gt;(this, android.R.layout.simple_list_item_multiple_choice, sports); listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE); listView.setAdapter(adapter); button.setOnClickListener(this); } private void findViewsById() { listView = (ListView) findViewById(R.id.list); button = (Button) findViewById(R.id.testbutton); } public void onClick(View v) { Interventii interventie = pacientiDB.getInterv(text); SparseBooleanArray checked = listView.getCheckedItemPositions(); ArrayList&lt;String&gt; selectedItems = new ArrayList&lt;String&gt;(); for (int i = 0; i &lt; checked.size(); i++) { int position = checked.keyAt(i); if (checked.valueAt(i)) selectedItems.add(adapter.getItem(position)); } String[] outputStrArr = new String[selectedItems.size()]; for (int i = 0; i &lt; selectedItems.size(); i++) { outputStrArr[i] = selectedItems.get(i); interventie = new Interventii(); interventie.setDenumire(selectedItems.get(i)); pacientiDB.insertI(interventie); } Intent intent = new Intent(getApplicationContext(), ListDataActivityInterv.class); Bundle b = new Bundle(); b.putStringArray("selectedItems", outputStrArr); intent.putExtras(b); startActivity(intent); } } </code></pre> <p>And I receive this error:</p> <pre><code>04-30 19:42:55.642: E/AndroidRuntime(4899): FATAL EXCEPTION: main 04-30 19:42:55.642: E/AndroidRuntime(4899): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.medicaldoi/com.example.medicaldoi.ListDataActivityInterv}: java.lang.NullPointerException 04-30 19:42:55.642: E/AndroidRuntime(4899): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 04-30 19:42:55.642: E/AndroidRuntime(4899): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 04-30 19:42:55.642: E/AndroidRuntime(4899): at android.app.ActivityThread.access$2300(ActivityThread.java:125) 04-30 19:42:55.642: E/AndroidRuntime(4899): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 04-30 19:42:55.642: E/AndroidRuntime(4899): at android.os.Handler.dispatchMessage(Handler.java:99) 04-30 19:42:55.642: E/AndroidRuntime(4899): at android.os.Looper.loop(Looper.java:123) 04-30 19:42:55.642: E/AndroidRuntime(4899): at android.app.ActivityThread.main(ActivityThread.java:4627) 04-30 19:42:55.642: E/AndroidRuntime(4899): at java.lang.reflect.Method.invokeNative(Native Method) 04-30 19:42:55.642: E/AndroidRuntime(4899): at java.lang.reflect.Method.invoke(Method.java:521) 04-30 19:42:55.642: E/AndroidRuntime(4899): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 04-30 19:42:55.642: E/AndroidRuntime(4899): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 04-30 19:42:55.642: E/AndroidRuntime(4899): at dalvik.system.NativeStart.main(Native Method) 04-30 19:42:55.642: E/AndroidRuntime(4899): Caused by: java.lang.NullPointerException 04-30 19:42:55.642: E/AndroidRuntime(4899): at java.util.Arrays$ArrayList.&lt;init&gt;(Arrays.java:49) 04-30 19:42:55.642: E/AndroidRuntime(4899): at java.util.Arrays.asList(Arrays.java:171) 04-30 19:42:55.642: E/AndroidRuntime(4899): at android.widget.ArrayAdapter.&lt;init&gt;(ArrayAdapter.java:125) 04-30 19:42:55.642: E/AndroidRuntime(4899): at com.example.medicaldoi.ListDataActivityInterv.onCreate(ListDataActivityInterv.java:45) 04-30 19:42:55.642: E/AndroidRuntime(4899): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 04-30 19:42:55.642: E/AndroidRuntime(4899): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 04-30 19:42:55.642: E/AndroidRuntime(4899): ... 11 more </code></pre> <p>Can someone help me? Have someone another idea?</p>
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    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USCristina
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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    2. PO
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    3. PO
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      1. POError when I want to create a listView from another listView
      1. This table or related slice is empty.
      1. VTUpMod
    1. COWhat's wrote on line 45 of ListDataActivityInterv ?
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      1. POError when I want to create a listView from another listView
      1. USAlexis C.
    2. CO@Saksak the `ListView` is instantiated before that with `findViewsById();`
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      1. POError when I want to create a listView from another listView
      1. UScodeMagic
    3. COhttp://developer.android.com/shareables/training/Animations.zip , this would be the best possible thing for u
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      1. POError when I want to create a listView from another listView
      1. USPranav Jadav
 

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