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public class Chat_Room extends AppCompatActivity {
private Button btn_send_msg;
private EditText input_msg;
private TextView chat_conversation;
private String user_name,room_name;
private DatabaseReference root;
private String temp_key;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.chat_room);
btn_send_msg = (Button) findViewById(R.id.button13);
input_msg = (EditText) findViewById(R.id.editText3);
chat_conversation = (TextView) findViewById(R.id.textView4);
user_name = getIntent().getExtras().get("user_name").toString();
room_name = getIntent().getExtras().get("room_name").toString();
setTitle("Room - " + room_name);
root = FirebaseDatabase.getInstance().getReference().child(room_name);
btn_send_msg.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Map<String, Object> map = new HashMap<String, Object>();
temp_key = root.push().getKey();
root.updateChildren(map);
DatabaseReference message_root = root.child(temp_key);
Map<String, Object> map2 = new HashMap<String, Object>();
map2.put("name", user_name);
map2.put("msg", input_msg.getText().toString());
message_root.updateChildren(map2);
}
});
root.addChildEventListener(new ChildEventListener() {
@Override
public void onChildAdded(DataSnapshot dataSnapshot, String s) {
append_chat_conversation(dataSnapshot);
}
@Override
public void onChildChanged(DataSnapshot dataSnapshot, String s) {
append_chat_conversation(dataSnapshot);
}
@Override
public void onChildRemoved(DataSnapshot dataSnapshot) {
}
@Override
public void onChildMoved(DataSnapshot dataSnapshot, String s) {
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
private String chat_msg,chat_user_name;
private void append_chat_conversation(DataSnapshot dataSnapshot) {
Iterator i = dataSnapshot.getChildren().iterator();
while (i.hasNext()){
chat_msg = (String) ((DataSnapshot)i.next()).getValue();
chat_user_name = (String) ((DataSnapshot)i.next()).getValue();
chat_conversation.append(chat_user_name + " : " + chat_msg + "\n");
}
}
基本上我想能夠發送消息使用當前發生的按鈕,但我想要的文本已經被鍵入並且在按鈕被點擊時發送消失。我想清除純文本框中的文本時,我按下按鈕,但無法找到任何東西
這是一個聊天室,所以這是必須停止用戶變得惱火。
謝謝!
心不是設置view.setText(「」)它'textview.setText(「」);'? –
將文本框的內容設置爲「」 – Prabu
可能的重複[如何清除TextView的值?](http://stackoverflow.com/questions/9037605/how-i-can-clear-the-value-的-的TextView) –