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爲什麼我的應用程序崩潰，當我離開我的活動？更具體地講：一切工作正常，直到我實現onSaveInstanceState()和onRestoreInstanceState()onSaveInstanceState崩潰我的應用程序
下面是代碼：
@Override
protected void onSaveInstanceState (Bundle outState){
outState.putString("d1",(((EditText) findViewById (R.id.request_detail1)).getText()).toString());
outState.putString("d2",(((EditText) findViewById (R.id.request_detail2)).getText()).toString());
outState.putString("d3",(((EditText) findViewById (R.id.request_detail3)).getText()).toString());
outState.putString("d4",(((EditText) findViewById (R.id.request_detail4)).getText()).toString());
outState.putString("inputNr", (((EditText) findViewById (R.id.poRequest)).getText()).toString());
super.onSaveInstanceState(outState);
}
@Override
protected void onRestoreInstanceState (Bundle savedInstanceState){
super.onRestoreInstanceState(savedInstanceState);
((TextView) findViewById (R.id.request_detail1)).setText(savedInstanceState.getString("d1"));
((TextView) findViewById (R.id.request_detail2)).setText(savedInstanceState.getString("d2"));
((TextView) findViewById (R.id.request_detail3)).setText(savedInstanceState.getString("d3"));
((TextView) findViewById (R.id.request_detail4)).setText(savedInstanceState.getString("d4"));
((EditText) findViewById (R.id.poRequest)).setText(savedInstanceState.getString("inputNr"));
}
logcat的告訴我 08-02 05:23:09.791: E/AndroidRuntime(873): at net.frontend.androidapp.statusrequest.PurchaseOrderRequest.onSaveInstanceState(PurchaseOrderRequest.java:47)
的refered線 outState.putString("d1",(((EditText) findViewById (R.id.request_detail1)).getText()).toString());
我有點困惑，只要onSaveInstanceState()被調用，應用程序崩潰。
，這裏是整個代碼，萬一我的錯誤是由別的
package net.frontend.androidapp.statusrequest;
import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.NavUtils;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
public class PurchaseOrderRequest extends Activity {
private static String preqnr="";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.purchase_order_request_activity);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
// Show the Up button in the action bar.
getActionBar().setDisplayHomeAsUpEnabled(true);
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
NavUtils.navigateUpFromSameTask(this);
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
protected void onSaveInstanceState (Bundle outState){
outState.putString("d1",(((EditText) findViewById (R.id.request_detail1)).getText()).toString());
outState.putString("d2",(((EditText) findViewById (R.id.request_detail2)).getText()).toString());
outState.putString("d3",(((EditText) findViewById (R.id.request_detail3)).getText()).toString());
outState.putString("d4",(((EditText) findViewById (R.id.request_detail4)).getText()).toString());
outState.putString("inputNr", (((EditText) findViewById (R.id.poRequest)).getText()).toString());
super.onSaveInstanceState(outState);
}
@Override
protected void onRestoreInstanceState (Bundle savedInstanceState){
super.onRestoreInstanceState(savedInstanceState);
((TextView) findViewById (R.id.request_detail1)).setText(savedInstanceState.getString("d1"));
((TextView) findViewById (R.id.request_detail2)).setText(savedInstanceState.getString("d2"));
((TextView) findViewById (R.id.request_detail3)).setText(savedInstanceState.getString("d3"));
((TextView) findViewById (R.id.request_detail4)).setText(savedInstanceState.getString("d4"));
((EditText) findViewById (R.id.poRequest)).setText(savedInstanceState.getString("inputNr"));
}
public void showDetail(View view){
Intent intent = new Intent(this, OrderDetails.class);
startActivity(intent);
}
public void checkStatus (View view) {
EditText edit = (EditText) findViewById (R.id.poRequest);
String s= edit.getText().toString();
if (s.equals("")){
// give error message
}
else{
long lineNr=Long.parseLong(s);
new BackgroundWorker().execute(lineNr);
}
}
public class BackgroundWorker extends AsyncTask<Long, Void, String[]> {
private String METHOD_NAME = "parser" ;
private String NAMESPACE = "http://statusrequest.androidapp.webservice.backend.net";
private String SOAP_ACTION = NAMESPACE + METHOD_NAME;
private static final String URL = "http://10.35.105.31:8080/SAPInterfaceWebservice/services/XMLTransfromer?wsdl";
ProgressDialog pd = new ProgressDialog(PurchaseOrderRequest.this);
@Override
protected String[] doInBackground(Long... lineNr) {
String[] failure = new String [1];
long lineNumber = lineNr[0];
try
{
SoapObject request = new SoapObject(NAMESPACE, METHOD_NAME);
request.addProperty("lineNr", lineNumber);
publishProgress();
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.dotNet = true;
envelope.setOutputSoapObject(request);
HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
androidHttpTransport.call(SOAP_ACTION,envelope);
Object result = envelope.getResponse();
String hString = result.toString();
String[] details = hString.split(",");
preqnr=details[0].substring(1);
return details;
} catch (Exception E) {
E.printStackTrace();
failure[0]="ERROR: " + E.getClass().getName() + " : " + E.getMessage();
}
return failure;
}
@Override
protected void onPostExecute(String[] result) {
((TextView) findViewById (R.id.request_detail1)).setText("PO_Number: " +result[0].substring(1));
((TextView) findViewById (R.id.request_detail2)).setText("Result: " +result[1]);
((TextView) findViewById (R.id.request_detail3)).setText("Result: " +result[2]);
((TextView) findViewById (R.id.request_detail4)).setText("Result: " +result[3]);
pd.dismiss();
}
@Override
protected void onPreExecute() {
pd.setMessage("Sending...");
pd.show();
}
@Override
protected void onProgressUpdate(Void... values) {
}
}
public static String getPreqnr() {
return preqnr;
}
}
引起那麼我做錯造成應用程序崩潰？
如果您需要任何進一步的信息，我錯過指出，請留下評論，我會添加它們。
謝謝你的幫助！
嘿，只要嘗試把super.onSaveInstanceState（outState）;作爲onSaveInstanceState的第一行。並在onRestoreInstanceState執行檢查，如果（savedInstanceState！= null）{//做必需的東西} – SKK
@Santhosh我曾嘗試過這個，應用程序仍然崩潰。即使如此，我將使用'if（savedInstanceState！= null）{//做必要的事情}'部分。但據我現在，甚至沒有得到恢復部分:(但謝謝你:) –