我写了一个可以接收短信的android应用程序。该应用程序正在运行它可以接收短信，但每次应用程序都是新安装。每次我从模拟器发送短信到应用程序（无需手动打开）它崩溃或强制关闭，但如果我手动打开它可以接收短信没有问题
这是我的代码，如果应用程序接收短信，它将执行此代码
public void onReceive(Context context, Intent intent) {
Bundle bundle = intent.getExtras();
SmsMessage [] msgs = null;
String messageReceived = "";
String senderPhoneNumber = null;
long senderTimestamp = 0;
String strTimestamp = null;
if (bundle != null) {
Object[] pdus = (Object[]) bundle.get("pdus");
msgs = new SmsMessage[pdus.length];
for (int i=0; i<msgs.length; i++) {
msgs[i] = SmsMessage.createFromPdu((byte[])pdus[i]);
messageReceived += msgs[i].getMessageBody().toString();
messageReceived += "\n";
}
senderPhoneNumber = msgs[0].getOriginatingAddress ();
senderTimestamp = msgs[0].getTimestampMillis() / 1000L;
strTimestamp = senderTimestamp + "";
if(MainActivity.active){
MainActivity.populateView(senderPhoneNumber, messageReceived, strTimestamp);
} else {
Intent i = new Intent(context,MainActivity.class);
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
MainActivity.populateView(senderPhoneNumber, messageReceived, strTimestamp);
context.startActivity(i);
}
}
}
请有人帮我这个。我希望不用手动打开它就能收到短信。
修改 这是堆栈跟踪
03-05 11:47:47.208: E/Trace(1512): error opening trace file: No such file or directory (2)
03-05 11:47:47.368: D/AndroidRuntime(1512): Shutting down VM
03-05 11:47:47.368: W/dalvikvm(1512): threadid=1: thread exiting with uncaught exception (group=0xb4e7f288)
03-05 11:47:47.430: E/AndroidRuntime(1512): FATAL EXCEPTION: main
03-05 11:47:47.430: E/AndroidRuntime(1512): java.lang.RuntimeException: Unable to start receiver com.amzngscrum.alpha2.SMSReceiver: java.lang.NullPointerException
03-05 11:47:47.430: E/AndroidRuntime(1512): at android.app.ActivityThread.handleReceiver(ActivityThread.java:2236)
03-05 11:47:47.430: E/AndroidRuntime(1512): at android.app.ActivityThread.access$1500(ActivityThread.java:130)
03-05 11:47:47.430: E/AndroidRuntime(1512): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1271)
03-05 11:47:47.430: E/AndroidRuntime(1512): at android.os.Handler.dispatchMessage(Handler.java:99)
03-05 11:47:47.430: E/AndroidRuntime(1512): at android.os.Looper.loop(Looper.java:137)
03-05 11:47:47.430: E/AndroidRuntime(1512): at android.app.ActivityThread.main(ActivityThread.java:4745)
03-05 11:47:47.430: E/AndroidRuntime(1512): at java.lang.reflect.Method.invokeNative(Native Method)
03-05 11:47:47.430: E/AndroidRuntime(1512): at java.lang.reflect.Method.invoke(Method.java:511)
03-05 11:47:47.430: E/AndroidRuntime(1512): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
03-05 11:47:47.430: E/AndroidRuntime(1512): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
03-05 11:47:47.430: E/AndroidRuntime(1512): at dalvik.system.NativeStart.main(Native Method)
03-05 11:47:47.430: E/AndroidRuntime(1512): Caused by: java.lang.NullPointerException
03-05 11:47:47.430: E/AndroidRuntime(1512): at com.amzngscrum.alpha2.CustomAdapterr.<init>(CustomAdapterr.java:26)
03-05 11:47:47.430: E/AndroidRuntime(1512): at com.amzngscrum.alpha2.MainActivity.populateView(MainActivity.java:134)
03-05 11:47:47.430: E/AndroidRuntime(1512): at com.amzngscrum.alpha2.SMSReceiver.onReceive(SMSReceiver.java:45)
03-05 11:47:47.430: E/AndroidRuntime(1512): at android.app.ActivityThread.handleReceiver(ActivityThread.java:2229)
03-05 11:47:47.430: E/AndroidRuntime(1512): ... 10 more
编辑2 这是MainActivity.class中的popuateview
public static void populateView(String sender, String message, String timestamp) {
if(sender == null || message == null || timestamp == null){
} else {
final DataHolder data = new DataHolder();
data.setSenderCPNumber(sender);
data.setSenderMessage(message);
data.setSenderTimestamp(timestamp);
customListViewValues.add(data);
}
adapter = new CustomAdapterr( customListView, customListViewValues);
lv.setAdapter(adapter);
adapter.notifyDataSetChanged();
cnt.setText("On Queue: " + lv.getAdapter().getCount());
start();
}
和CustomAdapterr.class的完整代码
public class CustomAdapterr extends BaseAdapter implements OnClickListener {
private Activity activity;
private ArrayList data = null;
private static LayoutInflater inflater = null;
DataHolder tempValues = null;
int i = 0;
public CustomAdapterr(Activity a, ArrayList d) {
activity = a;
data = d;
inflater = ( LayoutInflater )activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
public int getCount() {
return data.size();
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public static class ViewHolder{
public TextView cp;
public TextView mess;
public TextView ts;
}
public View getView(int position, View convertView, ViewGroup parent) {
View vi = convertView;
ViewHolder holder;
if(convertView == null){
vi = inflater.inflate(R.layout.list_row, null);
holder = new ViewHolder();
holder.cp = (TextView) vi.findViewById(R.id.cpnumber);
holder.mess = (TextView) vi.findViewById(R.id.messages);
holder.ts = (TextView) vi.findViewById(R.id.timestamp);
vi.setTag(holder);
} else {
holder = (ViewHolder) vi.getTag();
}
if(data.size()<=0) {
//no data here
}
else {
tempValues = null;
tempValues = (DataHolder) data.get(position);
holder.cp.setText(tempValues.getSenderCPNumber());
holder.mess.setText(tempValues.getSenderMessage());
holder.ts.setText(tempValues.getSenderTimestamp());
vi.setOnClickListener(new OnItemClickListener(position));
}
return vi;
}
private class OnItemClickListener implements OnClickListener{
private int mPosition;
OnItemClickListener(int position){
mPosition = position;
}
@Override
public void onClick(View arg0) {
MainActivity mainClick = (MainActivity) activity;
mainClick.onItemClick(mPosition);
}
}
@Override
public void onClick(View v) {
}
}
答案 0 :(得分：0)
NullPointerException是在适配器的构造函数中生成的，我不知道你的活动中customListView是什么，但是它是null，你应该考虑检查它，最初解决问题的变化这样：
adapter = new CustomAdapterr(customListView, customListViewValues);
为此：
adapter = new CustomAdapterr(this, customListViewValues);
使用populateView方法。