我试图从GCM更改chatroom.java的createReplayMsg消息资源，但为什么apapter.getData（）。添加错误？
它告诉我java.util.List com.example.yoyotrip.chat.MessageAdapter.getData（）＆＃39;在null对象引用上。
也许我应该使用AsyncTask来完成它？
PS。我是第一次使用这个论坛，其他资源在这 - ＆gt; https://github.com/yyting/yoyotrip或者告诉我，谢谢。
logcat的：
09-17 16:42:14.410 8416-8416/com.example.yoyotrip E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.example.yoyotrip, PID: 8416
java.lang.RuntimeException: Unable to start receiver com.example.yoyotrip.GCM.GcmBroadcastReceiver: java.lang.NullPointerException: Attempt to invoke virtual method 'java.util.List com.example.yoyotrip.chat.MessageAdapter.getData()' on a null object reference
at android.app.ActivityThread.handleReceiver(ActivityThread.java:2586)
at android.app.ActivityThread.access$1700(ActivityThread.java:144)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1355)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5221)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.util.List com.example.yoyotrip.chat.MessageAdapter.getData()' on a null object reference
at com.example.yoyotrip.GCM.GcmBroadcastReceiver.onReceive(GcmBroadcastReceiver.java:63)
chatroom.java
package com.example.yoyotrip;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Random;
import android.annotation.SuppressLint;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.ListView;
import android.widget.Toast;
import com.example.yoyotrip.chat.Message;
import com.example.yoyotrip.chat.MessageAdapter;
import com.example.yoyotrip.chat.MessageInputToolBox;
import com.example.yoyotrip.chat.OnOperationListener;
import com.example.yoyotrip.chat.Option;
public class chatroom extends ActionBarActivity {
private MessageInputToolBox box;
public ListView listView;
public MessageAdapter adapter;
public List<Message> messages ;
@SuppressLint("UseSparseArrays")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.chatroom);
initMessageInputToolBox();
initListView();
}
/**
* init MessageInputToolBox
*/
@SuppressLint("ShowToast")
public void initMessageInputToolBox(){
box = (MessageInputToolBox) findViewById(R.id.messageInputToolBox);
box.setOnOperationListener(new OnOperationListener() {
@Override
public void send(String content) {
System.out.println("===============" + content);
int rd=(int)(Math.random()*99)+1;
Message message = new Message(0, 1, rd%2==1?"Tom":"helen", "avatar", "Jerry", "avatar", content, true, true, new Date());
adapter.getData().add(message);
listView.setSelection(listView.getBottom());
//Just demo
createReplayMsg(message);
}
@Override
public void selectedFace(String content) {
System.out.println("===============" + content);
Message message = new Message(Message.MSG_TYPE_FACE, Message.MSG_STATE_SUCCESS, "Tomcat", "avatar", "Jerry", "avatar", content, true, true, new Date());
adapter.getData().add(message);
listView.setSelection(listView.getBottom());
//Just demo
createReplayMsg(message);
}
@Override
public void selectedFuncation(int index) {
System.out.println("===============" + index);
switch (index) {
case 0:
//do some thing
break;
case 1:
//do some thing
break;
default:
break;
}
Toast.makeText(chatroom.this, "Do some thing here, index :" +index, Toast.LENGTH_LONG).show();
}
});
ArrayList<String> faceNameList = new ArrayList<String>();
for(int x = 1; x <= 10; x++){
faceNameList.add("big"+x);
}
for(int x = 1; x <= 10; x++){
faceNameList.add("big"+x);
}
ArrayList<String> faceNameList1 = new ArrayList<String>();
for(int x = 1; x <= 7; x++){
faceNameList1.add("cig"+x);
}
ArrayList<String> faceNameList2 = new ArrayList<String>();
for(int x = 1; x <= 24; x++){
faceNameList2.add("dig"+x);
}
Map<Integer, ArrayList<String>> faceData = new HashMap<>();
faceData.put(R.drawable.em_cate_magic, faceNameList2);
faceData.put(R.drawable.em_cate_rib, faceNameList1);
faceData.put(R.drawable.em_cate_duck, faceNameList);
box.setFaceData(faceData);
List<Option> functionData = new ArrayList<Option>();
for(int x = 0; x < 5; x++){
Option takePhotoOption = new Option(this, "Take", R.drawable.take_photo);
Option galleryOption = new Option(this, "Gallery", R.drawable.gallery);
functionData.add(galleryOption);
functionData.add(takePhotoOption);
}
box.setFunctionData(functionData);
}
private void initListView(){
listView = (ListView) findViewById(R.id.messageListview);
//create Data
Message message = new Message(Message.MSG_TYPE_TEXT, Message.MSG_STATE_SUCCESS, "Tom", "avatar", "Jerry", "avatar", "Hi，大家好我是你們的導遊", true, true, new Date(System.currentTimeMillis() - (1000 * 60 * 60 * 24) * 8));
Message message1 = new Message(Message.MSG_TYPE_TEXT, Message.MSG_STATE_SUCCESS, "Tom", "avatar", "Jerry", "avatar", "Hello", false ,true, new Date(System.currentTimeMillis() - (1000 * 60 * 60 * 24)* 8));
Message message2 = new Message(Message.MSG_TYPE_TEXT, Message.MSG_STATE_SUCCESS, "helen", "avatar", "Jerry", "avatar", "我們要在哪集合??", false, true, new Date(System.currentTimeMillis() - (1000 * 60 * 60 * 24) * 7));
Message message3 = new Message(Message.MSG_TYPE_TEXT, Message.MSG_STATE_SUCCESS, "Tom", "avatar", "Jerry", "avatar", "台北車站嗎!?", false, true, new Date(System.currentTimeMillis() - (1000 * 60 * 60 * 24) * 7));
Message message4 = new Message(Message.MSG_TYPE_FACE, Message.MSG_STATE_SUCCESS, "Joe", "avatar", "Jerry", "avatar", "big3", false, true, new Date(System.currentTimeMillis() - (1000 * 60 * 60 * 24) * 6));
Message message5 = new Message(Message.MSG_TYPE_TEXT, Message.MSG_STATE_SUCCESS, "Joe", "avatar", "Jerry", "avatar", "可以在229公園那邊嗎?", false, true, new Date(System.currentTimeMillis() - (1000 * 60 * 60 * 24) * 6));
// Message message6 = new Message(Message.MSG_TYPE_TEXT, Message.MSG_STATE_FAIL, "Tom", "avatar", "Jerry", "avatar", "test send fail", true, false, new Date(System.currentTimeMillis() - (1000 * 60 * 60 * 24) * 6));
// Message message7 = new Message(Message.MSG_TYPE_TEXT, Message.MSG_STATE_SENDING, "Tom", "avatar", "Jerry", "avatar", "test sending", true, true, new Date(System.currentTimeMillis() - (1000 * 60 * 60 * 24) * 6));
messages = new ArrayList<Message>();
messages.add(message);
messages.add(message1);
messages.add(message2);
messages.add(message3);
messages.add(message4);
messages.add(message5);
// messages.add(message6);
// messages.add(message7);
adapter = new MessageAdapter(this, messages);
listView.setAdapter(adapter);
adapter.notifyDataSetChanged();
listView.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
box.hide();
return false;
}
});
}
//change message resource from GCM
public void createReplayMsg(final Message message){
final Message reMessage = new Message(message.getType(), 1, message.getFromUserName(), "avatar", "Jerry", "avatar",
message.getType() == 0 ? "Re:" + message.getContent() : message.getContent(),
false, true, new Date()
);
new Thread(new Runnable() {
@Override
public void run() {
try {
Thread.sleep(1000 * (new Random().nextInt(3) +1));
runOnUiThread(new Runnable() {
@Override
public void run() {
adapter.getData().add(reMessage);
adapter.notifyDataSetChanged();
listView.setSelection(listView.getBottom());
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
}).start();
}
}
MessageAdapter.java
package com.example.yoyotrip.chat;
import android.annotation.SuppressLint;
import android.content.Context;
import android.text.format.DateFormat;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.RelativeLayout;
import android.widget.RelativeLayout.LayoutParams;
import android.widget.TextView;
import com.example.yoyotrip.R;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
//import com.nostra13.universalimageloader.core.DisplayImageOptions;
//import com.nostra13.universalimageloader.core.ImageLoader;
public class MessageAdapter extends BaseAdapter {
private Context context;
private List<Message> data = null;
public MessageAdapter(Context context, List<Message> list) {
super();
this.context = context;
this.data = list;
}
@Override
public int getCount() {
return data != null ? data.size() : 0;
}
@Override
public Object getItem(int position) {
return data.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public int getItemViewType(int position) {
return this.data.get(position).getIsSend() ? 1 : 0;
}
@Override
public int getViewTypeCount() {
return 2;
}
@SuppressLint("InflateParams")
public View getView(int position, View convertView, ViewGroup parent) {
final Message message = data.get(position);
boolean isSend = message.getIsSend();
ViewHolder viewHolder = null;
if (convertView == null) {
viewHolder = new ViewHolder();
if (isSend) {
convertView = LayoutInflater.from(context).inflate(R.layout.msg_item_right, null);
} else {
convertView = LayoutInflater.from(context).inflate(R.layout.msg_item_left, null);
}
viewHolder.sendDateTextView = (TextView) convertView.findViewById(R.id.sendDateTextView);
viewHolder.sendTimeTextView = (TextView) convertView.findViewById(R.id.sendTimeTextView);
viewHolder.userAvatarImageView = (ImageView) convertView.findViewById(R.id.userAvatarImageView);
viewHolder.userNameTextView = (TextView) convertView.findViewById(R.id.userNameTextView);
viewHolder.textTextView = (TextView) convertView.findViewById(R.id.textTextView);
viewHolder.photoImageView = (ImageView) convertView.findViewById(R.id.photoImageView);
viewHolder.faceImageView = (ImageView) convertView.findViewById(R.id.faceImageView);
viewHolder.failImageView = (ImageView) convertView.findViewById(R.id.failImageView);
viewHolder.sendingProgressBar = (ProgressBar) convertView.findViewById(R.id.sendingProgressBar);
viewHolder.isSend = isSend;
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
try {
String dateString = DateFormat.format("yyyy-MM-dd h:mmaa", message.getTime()).toString();
String[] t = dateString.split(" ");
viewHolder.sendDateTextView.setText(t[0]);
viewHolder.sendTimeTextView.setText(t[1]);
if(position == 0){
viewHolder.sendDateTextView.setVisibility(View.VISIBLE);
}else{
//TODO is same day ?
Message pmsg = data.get(position-1);
if(inSameDay(pmsg.getTime(), message.getTime())){
viewHolder.sendDateTextView.setVisibility(View.GONE);
}else{
viewHolder.sendDateTextView.setVisibility(View.VISIBLE);
}
}
} catch (Exception e) {
}
viewHolder.userNameTextView.setText(message.getFromUserName());
switch (message.getType()) {
case 0://text
viewHolder.textTextView.setText(message.getContent());
viewHolder.textTextView.setVisibility(View.VISIBLE);
viewHolder.photoImageView.setVisibility(View.GONE);
viewHolder.faceImageView.setVisibility(View.GONE);
if(message.getIsSend()){
LayoutParams sendTimeTextViewLayoutParams = (LayoutParams) viewHolder.sendTimeTextView.getLayoutParams();
sendTimeTextViewLayoutParams.addRule(RelativeLayout.LEFT_OF, R.id.textTextView);
viewHolder.sendTimeTextView.setLayoutParams(sendTimeTextViewLayoutParams);
LayoutParams layoutParams = (LayoutParams) viewHolder.failImageView.getLayoutParams();
layoutParams.addRule(RelativeLayout.LEFT_OF, R.id.textTextView);
if( message.getSendSucces() != null && message.getSendSucces() == false){
viewHolder.failImageView.setVisibility(View.VISIBLE);
viewHolder.failImageView.setLayoutParams(layoutParams);
}else{
viewHolder.failImageView.setVisibility(View.GONE);
}
if(message.getState() != null && message.getState() == 0){
viewHolder.sendingProgressBar.setVisibility(View.VISIBLE);
viewHolder.sendingProgressBar.setLayoutParams(layoutParams);
}else{
viewHolder.sendingProgressBar.setVisibility(View.GONE);
}
}else{
viewHolder.failImageView.setVisibility(View.GONE);
viewHolder.sendingProgressBar.setVisibility(View.GONE);
LayoutParams sendTimeTextViewLayoutParams = (LayoutParams) viewHolder.sendTimeTextView.getLayoutParams();
sendTimeTextViewLayoutParams.addRule(RelativeLayout.RIGHT_OF, R.id.textTextView);
viewHolder.sendTimeTextView.setLayoutParams(sendTimeTextViewLayoutParams);
}
break;
case 1://photo
viewHolder.textTextView.setVisibility(View.GONE);
viewHolder.photoImageView.setVisibility(View.VISIBLE);
viewHolder.faceImageView.setVisibility(View.GONE);
//TODO set image
int id = context.getResources().getIdentifier(message.getContent(), "drawable", context.getPackageName());
viewHolder.photoImageView.setImageResource(id);
if(message.getIsSend() ){
LayoutParams sendTimeTextViewLayoutParams = (LayoutParams) viewHolder.sendTimeTextView.getLayoutParams();
sendTimeTextViewLayoutParams.addRule(RelativeLayout.LEFT_OF, R.id.photoImageView);
viewHolder.sendTimeTextView.setLayoutParams(sendTimeTextViewLayoutParams);
LayoutParams layoutParams = (LayoutParams) viewHolder.failImageView.getLayoutParams();
layoutParams.addRule(RelativeLayout.LEFT_OF, R.id.photoImageView);
if(message.getSendSucces() != null && message.getSendSucces() == false){
viewHolder.failImageView.setVisibility(View.VISIBLE);
viewHolder.failImageView.setLayoutParams(layoutParams);
}else{
viewHolder.failImageView.setVisibility(View.GONE);
}
if(message.getState() != null && message.getState() == 0){
viewHolder.sendingProgressBar.setVisibility(View.VISIBLE);
viewHolder.sendingProgressBar.setLayoutParams(layoutParams);
}else{
viewHolder.sendingProgressBar.setVisibility(View.GONE);
}
}else{
viewHolder.failImageView.setVisibility(View.GONE);
LayoutParams sendTimeTextViewLayoutParams = (LayoutParams) viewHolder.sendTimeTextView.getLayoutParams();
sendTimeTextViewLayoutParams.addRule(RelativeLayout.RIGHT_OF, R.id.photoImageView);
viewHolder.sendTimeTextView.setLayoutParams(sendTimeTextViewLayoutParams);
}
break;
case 2://face
viewHolder.photoImageView.setVisibility(View.GONE);
viewHolder.textTextView.setVisibility(View.GONE);
viewHolder.faceImageView.setVisibility(View.VISIBLE);
int resId = context.getResources().getIdentifier(message.getContent(), "drawable", context.getPackageName());
viewHolder.faceImageView.setImageResource(resId);
if(message.getIsSend()){
LayoutParams sendTimeTextViewLayoutParams = (LayoutParams) viewHolder.sendTimeTextView.getLayoutParams();
sendTimeTextViewLayoutParams.addRule(RelativeLayout.LEFT_OF, R.id.faceImageView);
viewHolder.sendTimeTextView.setLayoutParams(sendTimeTextViewLayoutParams);
LayoutParams layoutParams = (LayoutParams) viewHolder.failImageView.getLayoutParams();
layoutParams.addRule(RelativeLayout.LEFT_OF, R.id.faceImageView);
if(message.getSendSucces() != null && message.getSendSucces() == false){
viewHolder.failImageView.setVisibility(View.VISIBLE);
viewHolder.failImageView.setLayoutParams(layoutParams);
}else{
viewHolder.failImageView.setVisibility(View.GONE);
}
if(message.getState() != null && message.getState() == 0){
viewHolder.sendingProgressBar.setVisibility(View.VISIBLE);
viewHolder.sendingProgressBar.setLayoutParams(layoutParams);
}else{
viewHolder.sendingProgressBar.setVisibility(View.GONE);
}
}else{
viewHolder.failImageView.setVisibility(View.GONE);
LayoutParams sendTimeTextViewLayoutParams = (LayoutParams) viewHolder.sendTimeTextView.getLayoutParams();
sendTimeTextViewLayoutParams.addRule(RelativeLayout.RIGHT_OF, R.id.faceImageView);
viewHolder.sendTimeTextView.setLayoutParams(sendTimeTextViewLayoutParams);
}
break;
default:
viewHolder.textTextView.setText(message.getContent());
viewHolder.photoImageView.setVisibility(View.GONE);
viewHolder.faceImageView.setVisibility(View.GONE);
break;
}
// viewHolder.textTextView.setCompoundDrawablesWithIntrinsicBounds(0, 0, 0, 0);
return convertView;
}
public List<Message> getData() {
return data;
}
public void setData(List<Message> data) {
this.data = data;
}
public static boolean inSameDay(Date date1, Date Date2) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date1);
int year1 = calendar.get(Calendar.YEAR);
int day1 = calendar.get(Calendar.DAY_OF_YEAR);
calendar.setTime(Date2);
int year2 = calendar.get(Calendar.YEAR);
int day2 = calendar.get(Calendar.DAY_OF_YEAR);
if ((year1 == year2) && (day1 == day2)) {
return true;
}
return false;
}
static class ViewHolder {
public ImageView userAvatarImageView;
public TextView sendDateTextView;
public TextView userNameTextView;
public TextView textTextView;
public ImageView photoImageView;
public ImageView faceImageView;
public ImageView failImageView;
public TextView sendTimeTextView;
public ProgressBar sendingProgressBar;
public boolean isSend = true;
}
}
GcmBroadcastReceiver.java
package com.example.yoyotrip.GCM;
/**
* Created by colm on 2015/8/3.
*/
import android.app.Activity;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.content.WakefulBroadcastReceiver;
import android.util.Log;
import android.widget.ListView;
import com.example.yoyotrip.MainActivity;
import com.example.yoyotrip.R;
import com.example.yoyotrip.chat.Message;
import com.example.yoyotrip.chat.MessageAdapter;
import com.google.android.gms.gcm.GoogleCloudMessaging;
import java.util.Date;
public class GcmBroadcastReceiver extends WakefulBroadcastReceiver {
public static final int NOTIFICATION_ID = 0;
public ListView listView;
public MessageAdapter adapter;
@Override
public void onReceive(Context context, Intent intent) {
Bundle extras = intent.getExtras();
GoogleCloudMessaging gcm = GoogleCloudMessaging.getInstance(context);
String messageType = gcm.getMessageType(intent);
if (!extras.isEmpty()) {
if (GoogleCloudMessaging.MESSAGE_TYPE_SEND_ERROR
.equals(messageType)) {
Log.i(getClass() + " GCM ERROR", extras.toString());
} else if (GoogleCloudMessaging.MESSAGE_TYPE_DELETED
.equals(messageType)) {
Log.i(getClass() + " GCM DELETE", extras.toString());
} else if (GoogleCloudMessaging.MESSAGE_TYPE_MESSAGE
.equals(messageType)) {
Log.i(getClass() + " GCM MESSAGE", extras.toString());
if (extras.getString("title") .equals("chat")) {
/*show noteic*/
Intent i = new Intent(context, MainActivity.class);
i.setAction("android.intent.action.MAIN");
i.addCategory("android.intent.category.LAUNCHER");
MagicLenGCM.sendLocalNotification(context, NOTIFICATION_ID,
R.drawable.icon, "noteic", extras
.getString("message"), extras.getString("whofrom"), false,
PendingIntent.getActivity(context, 0, i,
PendingIntent.FLAG_CANCEL_CURRENT));
//message addchat
final Message message = new Message(0, 1, extras.getString("whofrom"), "avatar", "Jerry", "avatar", extras.getString("message"), false, true, new Date());
adapter.getData().add(message);
adapter.notifyDataSetChanged();
listView.setSelection(listView.getBottom());
} else if (extras.getString("title").equals("GCM")) {
Intent i = new Intent(context, MainActivity.class);
i.setAction("android.intent.action.MAIN");
i.addCategory("android.intent.category.LAUNCHER");
MagicLenGCM.sendLocalNotification(context, NOTIFICATION_ID,
R.drawable.icon, "GCM noteic", extras
.getString("message"), "yoyotrip", false,
PendingIntent.getActivity(context, 0, i,
PendingIntent.FLAG_CANCEL_CURRENT));
}
}
}
setResultCode(Activity.RESULT_OK);
}
}
答案 0 :(得分：0)
您永远不会使用适配器的构造函数在GcmBroadcastReceiver中创建新实例。您的适配器将始终为null，因此，getData()调用NullPointerExceptions。