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编辑时： 我不断获得空指针异常，当我尝试打电话sendTextMessage，和我不能”找出为什么...... 有趣的是，它并不总是发生，但往往确实如此。的Android NullPointerException异常发送短信
下面的代码：
package com.prolink.rute;
import android.app.ProgressDialog;
import android.content.BroadcastReceiver;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.telephony.SmsManager;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
public class SendActivity extends ActionBarActivity {
Button tourInput;
Button tourInputWithout;
EditText editNote;
ListView list;
TextView labelDate;
TextView labelaOdredista;
Bundle extras;
String startName;
String finishName;
String strDate;
String strNote="";
String name;
int option;
int nDrivers;
NetworkClass net;
DBHelper db;
DateClass dat;
DriverClass[] drivers;
// ---------------- Activiti OnCreate() ----------------
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent intent = getIntent();
extras = intent.getExtras();
option = extras.getInt("option");
startName = extras.getString("start");
finishName = extras.getString("finish");
net = new NetworkClass(this);
db = new DBHelper(this);
dat = new DateClass(this);
if(option == 2)
strDate = dat.tommorowDate();
else if(option == 10)
strDate = extras.getString("_datue");
else
strDate = dat.danasnjiDatum();
new SetTheContent().execute();
}// end void onCreate()
// ------------------ onBackPressed() ------------------
@Override
public void onBackPressed() {
// TODO Auto-generated method stub
}
// ------------------ Creating the ActionBar ------------------
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// TODO Auto-generated method stub
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.action_bar_2, menu);
return super.onCreateOptionsMenu(menu);
}// end boolean onCreateOptionsMenu()
// ------------------ Selecting the ActionBar option ------------------
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// TODO Auto-generated method stub
int id = item.getItemId();
switch(id){
case R.id.option_back:
finish();
break;
case R.id.option_home:
Intent intent = new Intent(SendActivity.this, StartActivity.class);
startActivity(intent);
break;
}
return super.onOptionsItemSelected(item);
}// end boolean onOptionsItemsSelected()
// ------------------ Setting the content ------------------
private class SetTheContent extends AsyncTask<Void, Void, Void>{
private ProgressDialog pd;
@Override
protected void onPreExecute(){
super.onPreExecute();
pd = new ProgressDialog(SendActivity.this);
pd.setMessage("Setting the content...");
pd.setCancelable(false);
pd.show();
}// end void onPreExecute()
@Override
protected Void doInBackground(Void... params) {
// TODO Auto-generated method stub
int[] ids = extras.getIntArray("selected_drivers");
nDrivers = ids.length;
drivers = new DriverClass[nDrivers];
for(int i=0; i<nDrivers; i++){
drivers[i] = new DriverClass();
drivers[i] = db.returnDriver(ids[i]);
}
return null;
}// end void doInBackground()
protected void onPostExecute(Void Result){
super.onPostExecute(Result);
if (pd.isShowing())
pd.dismiss();
setMyContent();
DriversAdapter adapter = new DriversAdapter(SendActivity.this, drivers, nDrivers, strDate);
list.setAdapter(adapter);
}
}// end class SetTheContent
// ------------------ Sending tour to server, sending SMS ------------------
private class TourInput extends AsyncTask<Boolean, Void, Boolean>{
private ProgressDialog pd;
Boolean _sms;
@Override
protected void onPreExecute(){
super.onPreExecute();
pd = new ProgressDialog(SendActivity.this);
pd.setMessage("Unos ture ...");
pd.setCancelable(false);
pd.show();
}// end void onPreExecute()
@Override
protected Boolean doInBackground(Boolean... params) {
// TODO Auto-generated method stub
_sms = params[0];
boolean success = net.potvrdiVezu();
if(option == 10){
String _start = extras.getString("_start");
String _finish = extras.getString("_finish");
if(net.deleteTour(Integer.parseInt(drivers[0].returnID()), _start, _finish, strDate) == 0)
success = false;
if(net.tourInput(Integer.parseInt(drivers[0].returnID()), startName, finishName, strDate, strNote) == 0)
success = false;
}//if
else{
if(success){
for(int i=0; i<nDrivers; i++){
if(net.tourInput(Integer.parseInt(drivers[i].returnID()), startName,
finishName, strDate, strNote) == 0){
success = false;
break;
}
}// for
}
}// else
return success;
}// end Void doInBackGround()
protected void onPostExecute(Boolean Result){
super.onPostExecute(Result);
if (pd.isShowing())
pd.dismiss();
if(Result){
new Thread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
if(option == 10){
int tour_id = extras.getInt("tour_id");
db.deleteTure(tour_id);
db.tourInsert(Integer.parseInt(drivers[0].returnID()), startName, finishName, datum);
if(_sms){
String smsTour = "Change: " + startName + " - " + finishName +
", date: " + strDate;
String smsNote = " Note: " + strNote;
String smsText = smsTour + smsNote;
Log.e("smsText", smsText);
smsSend(drivers[0].returnNumber(), smsTour, drivers[0].returnName());
smsSend(drivers[0].returnNumber(), smsNote, drivers[0].returnName());
db.smsInsert(Integer.parseInt(drivers[0].returnID()), dat.strDateTime(), smsText);
net.smsInsert(DBHelper.SMS_ID, Integer.parseInt(drivers[0].returnID()), dat.dateTime(), smsText);
}
}// if(option..)
else{
for(int i=0; i<nDrivers; i++){
db.tourInsert(Integer.parseInt(drivers[i].returnID()), startName, finishName, strDate);
if(_sms){
String smsTour = "Tour: " + startName + " - " + finishName +
", date: " + strDate;
String smsNote = " Note: " + strNote;
String smsDrivers = "";
for(int k=0; k<nDrivers-1; k++)
smsDrivers += drivers[k].returnName() + ", ";
smsDrivers += drivers[nDrivers - 1].returnName();
String smsText = smsTour + smsNote + " " + smsDrivers;
Log.e("smsText", smsText);
smsSend(drivers[i].returnNumber(), smsTour, drivers[i].returnName());
smsSend(drivers[i].returnNumber(), smsNote, drivers[i].returnName());
if(nDrivers > 1)
smsSend(drivers[i].returnNumber(), smsDrivers, drivers[i].returnName());
db.smsInsert(Integer.parseInt(drivers[i].returnID()), dat.dateTime(), smsText);
net.smsInsert(DBHelper.SMS_ID, Integer.parseInt(drivers[i].returnID()), dat.datumVrijeme(), smsText);
}
}
}// else(option..)
Intent intent = new Intent(SendActivity.this, StartActivity.class);
startActivity(intent);
}// run()
}).start();
}
else
Toast.makeText(SendActivity.this, "Failed input", Toast.LENGTH_SHORT).show();
}// end void onPostExecute()
}// end class TourInput
// ------------------ Set the content ------------------
private void setMyContent(){
setContentView(R.layout.activity_send);
tourInput = (Button) findViewById(R.id.button_tourInput);
tourInputWithout = (Button) findViewById(R.id.button_tourInput2);
editNote = (EditText) findViewById(R.id.edit_note);
list = (ListView) findViewById(R.id.list_send_drivers);
labelDate = (TextView) findViewById(R.id.label_send_datum);
labelaOdredista = (TextView) findViewById(R.id.label_send_destinations);
labelDate.setText(DateClass.formatDate(strDate));
labelaOdredista.setText(startName + "\t\t-\t\t" + finishName);
tourInput.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
strNote = editNote.getText().toString();
if(strNote.isEmpty())
strNote = "-";
Log.e("Note:", strNote);
if(net.hasNet())
new TourInput().execute(true);
else
Toast.makeText(SendActivity.this, "No Network", Toast.LENGTH_SHORT).show();
}// end onClick()
});// end setOnClickListener()
tourInputWithout.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
strNote = editNote.getText().toString();
if(strNote.isEmpty())
strNote = "-";
if(net.hasNet())
new TourInput().execute(false);
else
Toast.makeText(SendActivity.this, "No Network", Toast.LENGTH_SHORT).show();
}
});
}// end void setMyContent()
// ------------------ Sending SMS ------------------
private void smsSend(String number, String message, String name_){
SmsManager sms = SmsManager.getDefault();
name= name_;
try{
sms.sendTextMessage(number, null, message, null, null);
}
catch(IllegalArgumentException e){
Log.e("SMS error", e.getMessage().toString());
}
catch(Exception e){
Log.e("SMS Exception", e.getMessage().toString());
}
}// end void smsSend()
}
我想通了，有时候是因为变量“strDate”和“strNote”引发的异常，但在logcat中的内容是存在的，它打印出...
logcat的：
09-20 13:31:25.310: D/dalvikvm(14101): GC_FOR_ALLOC freed 163K, 4% free 6469K/6727K, paused 57ms
09-20 13:31:25.340: I/dalvikvm-heap(14101): Grow heap (frag case) to 6.856MB for 513744-byte allocation
09-20 13:31:25.440: D/dalvikvm(14101): GC_CONCURRENT freed 0K, 4% free 6970K/7239K, paused 2ms+3ms
09-20 13:31:25.980: I/dalvikvm(14101): Could not find method android.widget.LinearLayout$LayoutParams.<init>, referenced from method android.support.v7.internal.view.menu.ActionMenuView$LayoutParams.<init>
09-20 13:31:25.980: W/dalvikvm(14101): VFY: unable to resolve direct method 8268: Landroid/widget/LinearLayout$LayoutParams;.<init> (Landroid/widget/LinearLayout$LayoutParams;)V
09-20 13:31:25.980: D/dalvikvm(14101): VFY: replacing opcode 0x70 at 0x0000
09-20 13:31:26.590: D/dalvikvm(14101): GC_CONCURRENT freed 69K, 3% free 7317K/7495K, paused 4ms+4ms
09-20 13:31:26.780: D/CLIPBOARD(14101): Hide Clipboard dialog at Starting input: finished by someone else... !
09-20 13:31:32.060: D/dalvikvm(14101): GC_CONCURRENT freed 121K, 3% free 7587K/7815K, paused 3ms+5ms
09-20 13:31:32.680: D/dalvikvm(14101): GC_CONCURRENT freed 307K, 5% free 7748K/8135K, paused 26ms+19ms
09-20 13:31:34.600: D/dalvikvm(14101): GC_CONCURRENT freed 461K, 7% free 7741K/8263K, paused 5ms+6ms
09-20 13:31:37.460: D/dalvikvm(14101): GC_CONCURRENT freed 170K, 4% free 8044K/8327K, paused 5ms+3ms
09-20 13:31:43.680: E/Note:(14101): fffffffff
09-20 13:31:43.740: E/smsText(14101): Tour: ŠUMARIJA BRINJE - CEDAR d.o.o. - NAŠICE, date: 2014-09-21 Note: fffffffff BREZARIĆ MLADEN
09-20 13:31:43.800: W/dalvikvm(14101): threadid=14: thread exiting with uncaught exception (group=0x401be760)
09-20 13:31:43.810: E/AndroidRuntime(14101): FATAL EXCEPTION: Thread-17
09-20 13:31:43.810: E/AndroidRuntime(14101): java.lang.NullPointerException
09-20 13:31:43.810: E/AndroidRuntime(14101): at com.prolink.rute.SendActivity.smsSend(SendActivity.java:412)
09-20 13:31:43.810: E/AndroidRuntime(14101): at com.prolink.rute.SendActivity.access$1(SendActivity.java:399)
09-20 13:31:43.810: E/AndroidRuntime(14101): at com.prolink.rute.SendActivity$UnosTure$1.run(SendActivity.java:312)
09-20 13:31:43.810: E/AndroidRuntime(14101): at java.lang.Thread.run(Thread.java:1020)
09-20 13:31:45.840: I/dalvikvm(14101): threadid=4: reacting to signal 3
09-20 13:31:45.860: I/dalvikvm(14101): Wrote stack traces to '/data/anr/traces.txt'
的logcat的总是指向两行代码与空指针异常相关联： smsSend(drivers[i].returnNumber(), smsTour, drivers[i].returnName()) 和catch(Exception e){ Log.e(...); }。
它就像是smsSend方法的第二个参数的字符串变量为空。当我传递一个随机的字符串作为第二个参数时，它会起作用但是，当我传递变量smsTour，smsNote有时它抛出一个异常，有时不是。当我通过smsText，因为它总是抛出异常的说法..
我总是前打印logcat的那些字符串变量的值呼叫smsSend，这一切都很好..但由于某种原因抛出的例外..
我认为这可能是因为字符串的长度，但长度远远少于160个字符。 无论如何，我认为问题是与作为参数传递给sendSMS的字符串变量相关联，但不知道是什么和为什么...
任何帮助吗？
可以请你发布logcat的？ – Opiatefuchs 2014-09-19 13:44:36
并且在你的代码中指出你正在得到空指针异常。 – DrkStr 2014-09-19 13:56:40