android - 收到新短信时，短信接收应用程序崩溃 - Android

Question

我构建了一个 SMS 发送/接收 Activity ，一切正常。接收部分只是将我的所有文本从我的 Android 消息传递应用程序加载到 ListView 中。这也行。问题是当收到新短信时，它会立即崩溃。即使我在另一个应用程序或主屏幕上，我也会收到一个弹出窗口，提示我的应用程序已崩溃，并且每次收到新消息时都会重新崩溃。为什么会崩溃，我该如何解决？包含消息的 ListView 应该在收到新消息时更新。我将这段代码拼凑在一起，所以很可能我遗漏了一些东西。此外，只关注 SMSReceiver 类(在 SMSListFragment.java 中)和 refreshSmsInbox()(在 SMSMain.java 中>)，因为这些地方是加载到我的 ListView 的地方。此外，updateList() 会更新整个过程，但前提是我的收件箱中有预先存在的邮件。如果更新实际上可以实时更新，那就太好了。那可能吗？提前致谢。

在我的 list 中，这是我的相关权限:

<uses-permission android:name="android.permission.SEND_SMS" />
<uses-permission android:name="android.permission.WRITE_SMS" />
<uses-permission android:name="android.permission.READ_SMS" />
<uses-permission android:name="android.permission.RECEIVE_SMS" />

<receiver android:name=".SMSReceiver"
          android:exported="true"> 
      <intent-filter android:priority="999"> 
          <action android:name="android.provider.Telephony.SMS_RECEIVED" /> 
      </intent-filter> 
</receiver>

SMSMain.java

package org.azurespot.practiceapp.sms;

import java.util.ArrayList;

import org.azurespot.practiceapp.R;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.PendingIntent;
import android.content.ActivityNotFoundException;
import android.content.ContentResolver;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.provider.ContactsContract.CommonDataKinds.Phone;
import android.speech.RecognizerIntent;
import android.telephony.SmsManager;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;


public class SMSMain extends Activity {

    protected EditText etPhoneNumber;
    protected static EditText etMessage;
    protected View dialogView;
    private static final int CONTACT_PICKER_RESULT = 1001;
    AlertDialog dialog;
    protected static final int RESULT_SPEECH = 1;
    private static SMSMain smsMain;
    ArrayList<String> smsMessagesList = new ArrayList<String>();
    ListView smsListView;
    ArrayAdapter<String> arrayAdapter;

    public static SMSMain instance() {
        return smsMain;
    }

    @Override
    public void onStart() {
        super.onStart();
        smsMain = this;
    }


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_smsmain);

        // initialize ListView for displaying SMS messages
        smsListView = (ListView) findViewById(R.id.messages_list);
        arrayAdapter = new ArrayAdapter<String>(this, 
                android.R.layout.simple_list_item_1, smsMessagesList);
        smsListView.setAdapter(arrayAdapter);
        // long click on ListView item will delete message
        smsListView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
            @Override
            public boolean onItemLongClick(AdapterView<?> parent, View view,
                    int pos, long arg3) {

                //removes item at position you long-click on
                smsMessagesList.remove(pos);//where arg2 is position of item you click
                arrayAdapter.notifyDataSetChanged();  

                 return true;
            }
        });


    } // end onCreate


    public void readSMS(View v){

        refreshSmsInbox();
    }

    // adds text messages to the ListView via the adapter
    public void refreshSmsInbox() {
        ContentResolver contentResolver = getContentResolver();
        Cursor smsInboxCursor = contentResolver.query(Uri.parse
                    ("content://sms/inbox"), null, null, null, null);
        int indexBody = smsInboxCursor.getColumnIndex("body");
        int indexAddress = smsInboxCursor.getColumnIndex("address");
        if (indexBody < 0 || !smsInboxCursor.moveToFirst()) return;
        arrayAdapter.clear();
        do {
            String str = "SMS From: " + smsInboxCursor.getString(indexAddress) +
                    "\n" + smsInboxCursor.getString(indexBody) + "\n";
            arrayAdapter.add(str);
        } while (smsInboxCursor.moveToNext());
    }

    public void updateList(final String smsMessage) {
        arrayAdapter.insert(smsMessage, 0);
        arrayAdapter.notifyDataSetChanged();
    }


    public void composeSMS(View v){

        // build your dialog box
        AlertDialog.Builder builder = new AlertDialog.Builder(SMSMain.this);
        // Get the layout inflater & inflate the box
        final LayoutInflater inflater = SMSMain.this.getLayoutInflater();
        dialogView = inflater.inflate(R.layout.dialog_compose_sms, null);
        builder.setView(dialogView);
     // get phone number and message IDs
        etPhoneNumber = (EditText)dialogView.findViewById(R.id.sms_phone);
        etMessage = (EditText) dialogView.findViewById(R.id.sms_message);
        builder.setTitle("Send an SMS");
        builder.setPositiveButton("Send", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int id) {

                // Turns the entered phone number and message into String
                String phoneNumber = etPhoneNumber.getText().toString().trim();
                String message = etMessage.getText().toString().trim(); 
                // error check to make sure there is input
                if (phoneNumber.length() > 0 && message.length() > 0) 
                    // sends the SMS
                    sendSMS(phoneNumber, message);                
                else
                    Toast.makeText(getBaseContext(), 
                        "Please enter a phone number and message.", 
                        Toast.LENGTH_SHORT).show();
            }
        });
        builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int id) {
                // User cancelled the dialog
                dialog.cancel();
            }
        });
        // put all your builders in one create command
        dialog = builder.create(); 
        // show the dialog box
        dialog.show();

    }

    // clicked the microphone button to start speech to text
    public void speechToText(View v) {

        Intent intent = new Intent(
                            RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
        intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, "en-US");

        try {
            startActivityForResult(intent, RESULT_SPEECH);
            etMessage.setText("");
        } catch (ActivityNotFoundException a) {
            Toast t = Toast.makeText(getApplicationContext(),
                    "Ooopps! Your device doesn't support Speech to Text",
                    Toast.LENGTH_SHORT);
            t.show();
        }

    }

    // method for sending the SMS
    private void sendSMS(String phoneNumber, String message)
        {        
            PendingIntent pi = PendingIntent.getActivity(this, 0,
                                    new Intent(this, SMSMain.class), 0);                
            SmsManager sms = SmsManager.getDefault();
            sms.sendTextMessage(phoneNumber, null, message, pi, null);        
        }   

    public void addContact(View v) {

        // add a contact. using Android's ContactPicker
        Intent i = new Intent(Intent.ACTION_PICK,
                ContactsContract.CommonDataKinds.Phone.CONTENT_URI);
        startActivityForResult(i, CONTACT_PICKER_RESULT);

    }

    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        if (requestCode == RESULT_SPEECH){
            // speech to text result
            switch (requestCode) {
                case RESULT_SPEECH: {
                    if (resultCode == RESULT_OK && null != data) {

                        ArrayList<String> text = data
                                .getStringArrayListExtra
                                (RecognizerIntent.EXTRA_RESULTS);

                        etMessage.setText(text.get(0));
                    }
                    break;
                }
            }
        } // end if

        // picks a contact, puts into EditText
        if (resultCode == RESULT_OK) {
            switch (requestCode) {
            case CONTACT_PICKER_RESULT:
                Cursor cursor = null;
                String phone = "";
                try{
                    Uri result = data.getData();
                    // get the contact id from the URI
                    String id = result.getLastPathSegment();

                    // query for phone number
                    cursor = getContentResolver().query(
                            ContactsContract.CommonDataKinds.Phone.CONTENT_URI, 
                            null,
                            ContactsContract.CommonDataKinds.Phone._ID + "=?",
                            new String[]{id}, null);

                    int phoneIdx = cursor.getColumnIndex(Phone.DATA);

                    if (cursor.moveToFirst()) {
                        phone = cursor.getString(phoneIdx);
                    } 
                 } catch (Exception e) {
                        System.out.println("Getting contact failed.");
                 } finally {

                    etPhoneNumber.setText(phone, TextView.BufferType.EDITABLE);

                    if (phone.length() == 0) {
                            Toast.makeText(this, "No phone number found for contact.",
                                                                Toast.LENGTH_LONG).show();
                    }
                     if (cursor != null){
                            cursor.close();
                     }

                 } // end finally
                 break;  
            }
        }     
    }
}

SMSListFragment.java

package org.azurespot.practiceapp.sms;

import org.azurespot.practiceapp.R;

import android.app.ListFragment;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.provider.ContactsContract.PhoneLookup;
import android.telephony.SmsMessage;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;

public class SMSListFragment extends ListFragment{

    public static View viewList;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
      Bundle savedInstanceState) {

      // Defines the XML file for the fragment
      viewList = inflater.inflate(R.layout.sms_messages_fragment, 
                                                        container, false);

      return viewList;
    }

    public class SMSReceiver extends BroadcastReceiver{

        @Override
        public void onReceive(Context context, Intent intent) {

            //---get the SMS message passed in---
            Bundle bundle = intent.getExtras();        
            SmsMessage[] messages = null;
            String msgString = ""; 

            if (bundle != null)
            {
                //---retrieve the SMS message received---
                Object[] pdus = (Object[]) bundle.get("pdus");
                messages = new SmsMessage[pdus.length];            
                for (int i = 0; i < messages.length; i++){
                    messages[i] = SmsMessage.createFromPdu((byte[])pdus[i]);                
                    msgString += "SMS From: " + messages[i].getOriginatingAddress();                     
                    msgString += " :";
                    msgString += messages[i].getMessageBody().toString();
                    msgString += "\n"; 



                }

                //---display the new SMS message---
                SMSMain smsMain = SMSMain.instance();
                smsMain.updateList(msgString);
            }
        }

    }

}

逻辑猫

01-01 18:24:09.444: E/AndroidRuntime(13141): FATAL EXCEPTION: main
01-01 18:24:09.444: E/AndroidRuntime(13141): Process: org.azurespot.practiceapp, PID: 13141
01-01 18:24:09.444: E/AndroidRuntime(13141): java.lang.RuntimeException: Unable to instantiate receiver org.azurespot.practiceapp.SMSReceiver: java.lang.ClassNotFoundException: Didn't find class "org.azurespot.practiceapp.SMSReceiver" on path: DexPathList[[zip file "/data/app/org.azurespot.practiceapp-2.apk"],nativeLibraryDirectories=[/data/app-lib/org.azurespot.practiceapp-2, /vendor/lib, /system/lib]]
01-01 18:24:09.444: E/AndroidRuntime(13141):    at android.app.ActivityThread.handleReceiver(ActivityThread.java:2608)
01-01 18:24:09.444: E/AndroidRuntime(13141):    at android.app.ActivityThread.access$1800(ActivityThread.java:173)
01-01 18:24:09.444: E/AndroidRuntime(13141):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1379)
01-01 18:24:09.444: E/AndroidRuntime(13141):    at android.os.Handler.dispatchMessage(Handler.java:102)
01-01 18:24:09.444: E/AndroidRuntime(13141):    at android.os.Looper.loop(Looper.java:136)
01-01 18:24:09.444: E/AndroidRuntime(13141):    at android.app.ActivityThread.main(ActivityThread.java:5579)
01-01 18:24:09.444: E/AndroidRuntime(13141):    at java.lang.reflect.Method.invokeNative(Native Method)
01-01 18:24:09.444: E/AndroidRuntime(13141):    at java.lang.reflect.Method.invoke(Method.java:515)
01-01 18:24:09.444: E/AndroidRuntime(13141):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1268)
01-01 18:24:09.444: E/AndroidRuntime(13141):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084)
01-01 18:24:09.444: E/AndroidRuntime(13141):    at dalvik.system.NativeStart.main(Native Method)
01-01 18:24:09.444: E/AndroidRuntime(13141): Caused by: java.lang.ClassNotFoundException: Didn't find class "org.azurespot.practiceapp.SMSReceiver" on path: DexPathList[[zip file "/data/app/org.azurespot.practiceapp-2.apk"],nativeLibraryDirectories=[/data/app-lib/org.azurespot.practiceapp-2, /vendor/lib, /system/lib]]
01-01 18:24:09.444: E/AndroidRuntime(13141):    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:67)
01-01 18:24:09.444: E/AndroidRuntime(13141):    at java.lang.ClassLoader.loadClass(ClassLoader.java:497)
01-01 18:24:09.444: E/AndroidRuntime(13141):    at java.lang.ClassLoader.loadClass(ClassLoader.java:457)
01-01 18:24:09.444: E/AndroidRuntime(13141):    at android.app.ActivityThread.handleReceiver(ActivityThread.java:2603)
01-01 18:24:09.444: E/AndroidRuntime(13141):    ... 10 more

Answer 1

当您在 list 中声明接收者时:

<receiver android:name=".SMSReceiver"
      android:exported="true"> 
  <intent-filter android:priority="999"> 
      <action android:name="android.provider.Telephony.SMS_RECEIVED" /> 
  </intent-filter> 
</receiver>

android:name=".SMSReceiver" 中的 . 将扩展为您的包名称。因此，您在 list 中所写的内容等同于

<receiver android:name="org.azurespot.practiceapp.SMSReceiver"
      android:exported="true"> 
  <intent-filter android:priority="999"> 
      <action android:name="android.provider.Telephony.SMS_RECEIVED" /> 
  </intent-filter> 
</receiver>

请注意，此路径与您在 SMSListFragment 中定义的类 SMSReceiver 的路径不匹配，这是 logcat 错误指示的内容。

您可能应该在 list 中使用 android:name=".sms.SMSListFragment.SMSReceiver"。 SMSReceiver 嵌套类可能也需要声明为静态才能以这种方式访问​​。