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我正在面臨兩個problem.why兩排（消息）之間這麼大的空間有兩行（消息）之間存在太多空間recylerview.i我試圖做一個聊天應用recyclerview.why在進入活動時未輸入消息，而是在消息編輯文本文本點擊時輸入消息。
我的代碼：
聊天佈局自己：
<TextView
android:id="@+id/message"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_marginRight="10dp"
android:textIsSelectable="true"
android:background="@drawable/bg_bubble_gray"
android:textSize="14dp" />
<TextView
android:id="@+id/timestamp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="@id/message"
android:layout_below="@id/message"
android:layout_marginBottom="25dp"
android:padding="10dp"
android:textSize="10dp" />
chat layout myself:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:paddingTop="5dp"
android:paddingLeft="16dp"
android:paddingRight="16dp"
>
<TextView
android:id="@+id/message"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_marginLeft="10dp"
android:textIsSelectable="true"
android:background="@drawable/bg_bubble_white"
android:textSize="14dp" />
<TextView
android:id="@+id/timestamp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@id/message"
android:layout_marginBottom="25dp"
android:layout_marginLeft="10dp"
android:paddingLeft="10dp"
android:paddingTop="6dp"
android:textSize="10dp" />
</LinearLayout>
適配器：
public class ChatRoomThreadAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private static String TAG = ChatRoomThreadAdapter.class.getSimpleName();
private String userId;
private int SELF = 100;
private static String today;
private Context mContext;
private ArrayList<Message> messageArrayList;
public class ViewHolder extends RecyclerView.ViewHolder {
TextView message, timestamp;
public ViewHolder(View view) {
super(view);
message = (TextView) itemView.findViewById(R.id.message);
timestamp = (TextView) itemView.findViewById(R.id.timestamp);
}
}
public ChatRoomThreadAdapter(Context mContext, ArrayList<Message> messageArrayList, String userId) {
this.mContext = mContext;
this.messageArrayList = messageArrayList;
this.userId = userId;
Calendar calendar = Calendar.getInstance();
today = String.valueOf(calendar.get(Calendar.DAY_OF_MONTH));
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView;
// view type is to identify where to render the chat message
// left or right
if (viewType == SELF) {
// self message
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.chat_layout_myself, parent, false);
} else {
// others message
itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.chat_layout_other, parent, false);
}
return new ViewHolder(itemView);
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
Message message = messageArrayList.get(position);
((ViewHolder) holder).message.setText(message.getMessage());
String timestamp = getTimeStamp(message.getCreatedAt());
if (message.getUser().getName() != null)
timestamp = message.getUser().getName() + ", " + timestamp;
((ViewHolder) holder).timestamp.setText(timestamp);
}
@Override
public int getItemViewType(int position) {
Message message = messageArrayList.get(position);
if (message.getUser().getId().equals(userId)) {
return SELF;
}
return position;
}
@Override
public int getItemCount() {
return messageArrayList.size();
}
public static String getTimeStamp(String dateStr) {
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String timestamp = "";
today = today.length() < 2 ? "0" + today : today;
try {
Date date = format.parse(dateStr);
SimpleDateFormat todayFormat = new SimpleDateFormat("dd");
String dateToday = todayFormat.format(date);
format = dateToday.equals(today) ? new SimpleDateFormat("hh:mm a") : new SimpleDateFormat("dd LLL, hh:mm a");
String date1 = format.format(date);
timestamp = date1.toString();
} catch (ParseException e) {
e.printStackTrace();
}
return timestamp;
}
}
聊天內容佈局：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context="com.systechdigital.webadeal.ChatActivity"
tools:showIn="@layout/activity_chat">
<ListView
android:id="@android:id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_above="@+id/listFooter"
android:layout_alignParentTop="true"
android:transcriptMode="alwaysScroll"
android:background="#393839"
/>
<LinearLayout
android:id="@+id/listFooter"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:orientation="horizontal">
<EditText
android:id="@+id/messageInput"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:inputType="textShortMessage"
android:lines="1"
android:singleLine="true" />
<ImageButton
android:id="@+id/sendButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@android:drawable/ic_menu_send" />
</LinearLayout>
</RelativeLayout>
聊天活動：
public class ChatRoomActivity extends AppCompatActivity {
private String TAG = ChatRoomActivity.class.getSimpleName();
private String chatRoomId;
private RecyclerView recyclerView;
private ChatRoomThreadAdapter mAdapter;
private ArrayList<Message> messageArrayList;
private EditText inputMessage;
private Button btnSend;
private AsyncTaskClass backgroundTask;
private Context context_chatLisActivity;
private ProgressDialog progressDialog;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_chat_room);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
inputMessage = (EditText) findViewById(R.id.message);
btnSend = (Button) findViewById(R.id.btn_send);
context_chatLisActivity=ChatRoomActivity.this;
chatRoomId = InfoSetClass.getRoom_id();
Log.v("ResDRoomId",chatRoomId);
// String title = intent.getStringExtra("name");
// getSupportActionBar().setTitle(title);
// getSupportActionBar().setDisplayHomeAsUpEnabled(true);
if (chatRoomId == null) {
Toast.makeText(getApplicationContext(), "Chat room not found!", Toast.LENGTH_SHORT).show();
finish();
}
recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
messageArrayList = new ArrayList<>();
// self user id is to identify the message owner
String selfUserId = InfoSetClass.getOwn_UserId();
mAdapter = new ChatRoomThreadAdapter(this, messageArrayList, selfUserId);
LinearLayoutManager layoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(layoutManager);
recyclerView.setItemAnimator(new DefaultItemAnimator());
recyclerView.setAdapter(mAdapter);
/* mRegistrationBroadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(Config.PUSH_NOTIFICATION)) {
// new push message is received
}
}
};*/
btnSend.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sendMessage();
}
});
fetchChatThread();
}
/**
* Posting a new message in chat room
* will make an http call to our server. Our server again sends the message
* to all the devices as push notification
* */
private void sendMessage() {
final String message = this.inputMessage.getText().toString().trim();
if (TextUtils.isEmpty(message)) {
Toast.makeText(getApplicationContext(), "Enter a message", Toast.LENGTH_SHORT).show();
return;
}
this.inputMessage.setText("");
StringRequest strReq = new StringRequest(Request.Method.POST,
endPoint, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.v("ResDSNDMsg ", response);
try {
JSONObject obj = new JSONObject(response);
// check for error
if (obj.getBoolean("error") == false) {
JSONObject commentObj = obj.getJSONObject("message");
/*String commentId = commentObj.getString("message_id");
String commentText = commentObj.getString("message");
String createdAt = commentObj.getString("created_at");
JSONObject userObj = obj.getJSONObject("user");
String userId = userObj.getString("user_id");
String userName = userObj.getString("name");
User user = new User(userId, userName, null);
Message message = new Message();
message.setId(commentId);
message.setMessage(commentText);
message.setCreatedAt(createdAt);*/
// messageArrayList.add(message);
mAdapter.notifyDataSetChanged();
if (mAdapter.getItemCount() > 1) {
// scrolling to bottom of the recycler view
recyclerView.getLayoutManager().smoothScrollToPosition(recyclerView, null, mAdapter.getItemCount() - 1);
}
} else {
Toast.makeText(getApplicationContext(), "" + obj.getString("message"), Toast.LENGTH_LONG).show();
}
} catch (JSONException e) {
Log.e(TAG, "json parsing error: " + e.getMessage());
Toast.makeText(getApplicationContext(), "json parse error: " + e.getMessage(), Toast.LENGTH_SHORT).show();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
NetworkResponse networkResponse = error.networkResponse;
Log.e(TAG, "Volley error: " + error.getMessage() + ", code: " + networkResponse);
Toast.makeText(getApplicationContext(), "Volley error: " + error.getMessage(), Toast.LENGTH_SHORT).show();
inputMessage.setText(message);
}
}) {
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put("user_id", MyApplication.getInstance().getPrefManager().getUser().getId());
params.put("message", message);
Log.e(TAG, "Params: " + params.toString());
return params;
};
};
// disabling retry policy so that it won't make
// multiple http calls
int socketTimeout = 0;
RetryPolicy policy = new DefaultRetryPolicy(socketTimeout,
DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
DefaultRetryPolicy.DEFAULT_BACKOFF_MULT);
strReq.setRetryPolicy(policy);
//Adding request to request queue
MyApplication.getInstance().addToRequestQueue(strReq);
}
/**
* Fetching all the messages of a single chat room
* */
private void fetchChatThread() {
progressDialog = new ProgressDialog(ChatRoomActivity.this);
progressDialog.setMessage("Please wait.....");
progressDialog.show();
String chatFetch = "";
backgroundTask = new AsyncTaskClass(context_chatLisActivity);
new android.os.Handler().postDelayed(new Runnable() {
@Override
public void run() {
// progressDialog.dismiss();
if (progressDialog.isShowing()) {
try {
progressDialog.dismiss();
} catch (Exception e) {// nothing }
}
}
String result = backgroundTask.getResponse(1);
Log.v("ResDMSGFetch", result);
try {
JSONObject js = new JSONObject(result);
// Log.v("ResDFrJ",js.toString());
JSONArray arr = js.getJSONArray("");
for (int i = 0; i < arr.length(); i++) {
JSONObject tmpOb = new JSONObject(arr.optString(i));
}
mAdapter.notifyDataSetChanged();
if (mAdapter.getItemCount() > 1) {
recyclerView.getLayoutManager().smoothScrollToPosition(recyclerView, null, mAdapter.getItemCount() - 1);
} else {
Toast.makeText(getApplicationContext(), "", Toast.LENGTH_LONG).show();
}
} catch (JSONException e) {
Log.v("JSONExp_Users", e.toString());
}
}
}, 3000);
/* StringRequest strReq = new StringRequest(Request.Method.GET,
endPoint, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.v("ResDMSGFetch: ", response);
try {
JSONObject obj = new JSONObject(response);
// check for error
if (obj.getBoolean("error") == false) {
JSONArray commentsObj = obj.getJSONArray("result");
for (int i = 0; i < commentsObj.length(); i++) {
JSONObject commentObj = (JSONObject) commentsObj.get(i);
String commentId = commentObj.getString("message_id");
String commentText = commentObj.getString("message");
String createdAt = commentObj.getString("created_at");
JSONObject userObj = commentObj.getJSONObject("user");
String userId = userObj.getString("user_id");
String userName = userObj.getString("username");
User user = new User(userId, userName, null);
Message message = new Message();
message.setId(commentId);
message.setMessage(commentText);
message.setCreatedAt(createdAt);
message.setUser(user);
messageArrayList.add(message);
}
mAdapter.notifyDataSetChanged();
if (mAdapter.getItemCount() > 1) {
recyclerView.getLayoutManager().smoothScrollToPosition(recyclerView, null, mAdapter.getItemCount() - 1);
}
} else {
Toast.makeText(getApplicationContext(), "" + obj.getJSONObject("error").getString("message"), Toast.LENGTH_LONG).show();
}
} catch (JSONException e) {
Log.e(TAG, "json parsing error: " + e.getMessage());
Toast.makeText(getApplicationContext(), "json parse error: " + e.getMessage(), Toast.LENGTH_SHORT).show();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
NetworkResponse networkResponse = error.networkResponse;
Log.e(TAG, "Volley error: " + error.getMessage() + ", code: " + networkResponse);
Toast.makeText(getApplicationContext(), "Volley error: " + error.getMessage(), Toast.LENGTH_SHORT).show();
}
});
//Adding request to request queue
MyApplication.getInstance().addToRequestQueue(strReq);*/
}
}
我需要一些嚴重help.please就幫我解決這個問題，2。
好，像你說的，但不工作我都試過了。 – AAA