My app 2 spinners ,which basically are drop down lists allowing users to select values. Spinner1 has 4options in dropdown and Spinner2 has 5options in dropdown.
If user selects option1 from spinner1 and option1 from spinner2 , a bulleted list [in the HTML webapp version of this app , i use li tags] should be displayed in a webview in a fragment in rest of the view.The image will make things more clear.
Now every time i try to select values from both the spinners and click submit ,the application crashes.
I am attaching the code below
This is for Startup Activity-
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.Spinner;
import android.widget.Toast;
public class MyAndroidAppActivity extends Activity {
private Spinner spinner1, spinner2;
private Button btnSubmit;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
addItemsOnSpinner2();
addListenerOnButton();
addListenerOnSpinnerItemSelection();
}
//add items into spinner dynamically
public void addItemsOnSpinner2() {
spinner2 = (Spinner) findViewById(R.id.spinner2);
List<String> list = new ArrayList<String>();
list.add("Equipment");
list.add("Indications");
list.add("Illustration");
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item,list);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner2.setAdapter(dataAdapter);
}
public void addListenerOnSpinnerItemSelection(){
spinner1 = (Spinner) findViewById(R.id.spinner1);
spinner1.setOnItemSelectedListener(new CustomOnItemSelectedListener());
}
//get the selected dropdown list value
public void addListenerOnButton() {
spinner1 = (Spinner) findViewById(R.id.spinner1);
spinner2 = (Spinner) findViewById(R.id.spinner2);
btnSubmit = (Button) findViewById(R.id.btnSubmit);
btnSubmit.setOnClickListener(new OnClickListener() {
/*@Override
public void onClick(View v) {
Toast.makeText(MyAndroidAppActivity.this,
"OnClickListener : " +
"\nSpinner 1 : " + String.valueOf(spinner1.getSelectedItem()) +
"\nSpinner 2 : " + String.valueOf(spinner2.getSelectedItem()),
Toast.LENGTH_SHORT).show();
}*/
@Override
public void onClick(View v) {
WebViewerFragment wvf = (WebViewerFragment) getFragmentManager().findFragmentById(R.id.webviewfrag);
if (wvf != null && wvf.getView() != null) {
wvf.updateWebView(spinner1.getSelectedItemPosition(), spinner2.getSelectedItemPosition());
}
}
});
}
}
This is the method for webview
import android.R.string;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView;
import android.widget.AdapterView;
import android.widget.Toast;
public class WebViewerFragment extends Fragment {
private WebView mWebView;
// a two dimensional array representing the data to put in the WebView
String mData[][]= new String[4][5];
{
for (int i=0;i<4;i++)
{
for(int j=0;j<4;j++)
{
mData[i][j]="<html><body><h1>Temp1</h1></body></html>";
}
}
}
/* Toast.makeText(this, mData[i][j],Toast.LENGTH_SHORT);
*/
/* int[][] a1 = {
{ 1, 2, 3, },
{ 4, 5, 6, },
};
{ {},{}};
*/
/* String SurgEqui="<html><body><h2>Equipment</h2><ul><li><p>IV catheter :Be certain that IV is in place and flushing easily</p></li></body><html>";
*/
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View mainView = (View) inflater.inflate(R.layout.frag_layout, container, false);
mWebView = (WebView) mainView.findViewById(R.id.webView1);
return mainView;
}
public void updateWebView(int firstSelection, int secondSelection) {
if (firstSelection == AdapterView.INVALID_POSITION || secondSelection == AdapterView.INVALID_POSITION) {
return;
} else {
if (mWebView != null) {
mWebView.loadData(mData[firstSelection][secondSelection].replace("+", "%20"), "text/html", "utf-8");
// mWebView.loadData(mData[firstSelection][secondSelection], "text/html", null);
//wv.loadData(URLEncoder.encode(myString).replace("+", "%20"), "text/html, "utf-8");
}
}
}
}
This is the layout
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
>
<Button
android:id="@+id/btnSubmit"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_marginTop="101dp"
android:text="@string/submit" />
<Spinner
android:id="@+id/spinner1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:entries="@array/country_arrays" />
<Spinner
android:id="@+id/spinner2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_toRightOf="@+id/spinner1" />
<fragment
android:id="@+id/webviewfrag"
android:name="android.webkit.WebViewFragment"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/btnSubmit"
android:layout_marginLeft="246dp"
android:layout_marginTop="244dp"
/>
<WebView
android:id="@+id/webView1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:layout_below="@+id/btnSubmit" />
</RelativeLayout>
You should include the logcat with the error. However there are two issues I have noticed:
To fix it try:
1.Remove:
from addListenerOnButton() method.
2.Call addListenerOnSpinnerItemSelection() before addListenerOnButton():