我有小问题。我的问题是自动刷新列出消息。 如何立即查看WhatsApp等数据？ 如果您想自动更新来自的数据。
我不知道我该怎么办，所以我在等你的帮助。
代码
MessagingActivity.java
package com.socialnetwork.activities;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.os.SystemClock;
import android.os.Vibrator;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.EditText;
import android.widget.FrameLayout;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
import com.socialnetwork.R;
import com.socialnetwork.adapters.MessagesAdapter;
import com.socialnetwork.animation.ViewAudioProxy;
import com.socialnetwork.api.APIService;
import com.socialnetwork.api.ChatAPI;
import com.socialnetwork.api.UsersAPI;
import com.socialnetwork.data.MessagesItem;
import com.socialnetwork.data.userItem;
import com.socialnetwork.helpers.M;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.TimeUnit;
import retrofit.Callback;
import retrofit.RetrofitError;
import retrofit.client.Response;
public class MessagingActivity extends AppCompatActivity implements OnClickListener {
public Intent mIntent = null;
private MediaRecorder recorder = null;
private String outFile = null;
private TextView recordTimeText;
private ImageButton audioSendButton;
private View recordPanel;
private View slideText;
private float startedDraggingX = -1;
private float distCanMove = dp(80);
private long startTime = 0L;
long timeInMilliseconds = 0L;
long timeSwapBuff = 0L;
long updatedTime = 0L;
private Timer timer;
public int RECIPIENT_ID = 0,
CONVERSATION_ID = 0;
public LinearLayoutManager layoutManager;
private EditText messageField;
private String messageBody, USERNAME;
private MessagesAdapter messageAdapter;
private List<MessagesItem> mMessages = new ArrayList<MessagesItem>();
public BroadcastReceiver mMessageReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
// Extract data included in the Intent
Bundle data = intent.getBundleExtra("data");
if (Integer.parseInt(data.getString("ownerID")) == RECIPIENT_ID) {
MessagesItem newMsg = new MessagesItem();
newMsg.setOwnerName(data.getString("ownerName"));
newMsg.setId(Integer.parseInt(data.getString("id")));
newMsg.setMessage(data.getString("message"));
newMsg.setDate(data.getString("date"));
newMsg.setOwnerUsername(data.getString("ownerUsername"));
newMsg.setOwnerPicture(data.getString("ownerPicture"));
newMsg.setOwnerID(Integer.parseInt(data.getString("ownerID")));
newMsg.setConversationID(Integer.parseInt(data.getString("conversationID")));
addMessage(newMsg);
} else {
Intent resultIntent = new Intent(MessagingActivity.this, MessagingActivity.class);
resultIntent.putExtra("data", intent);
M.showNotification(MessagingActivity.this, resultIntent,
data.getString("ownerUsername"),
data.getString("message"),
Integer.parseInt(data.getString("conversationID")));
}
}
};
private RecyclerView messagesList;
private LinearLayout attachLayout;
private RelativeLayout recordPannel;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (M.getToken(this) == null) {
Intent mIntent = new Intent(this, LoginActivity.class);
startActivity(mIntent);
finish();
} else {
setContentView(R.layout.messaging);
initializer();
if (getIntent().hasExtra("conversationID")) {
CONVERSATION_ID = getIntent().getExtras().getInt("conversationID");
}
if (getIntent().hasExtra("recipientID")) {
RECIPIENT_ID = getIntent().getExtras().getInt("recipientID");
}
getUser();
getMessages();
}
}
public void initializer() {
messagesList = (RecyclerView) findViewById(R.id.listMessages);
messageAdapter = new MessagesAdapter(this, mMessages);
messagesList.setAdapter(messageAdapter);
//
layoutManager = new LinearLayoutManager(this);
layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
layoutManager.setStackFromEnd(true);
messagesList.setLayoutManager(layoutManager);
messageField = (EditText) findViewById(R.id.messageField);
attachLayout = (LinearLayout) findViewById(R.id.attachLayout);
recordPannel = (RelativeLayout) findViewById(R.id.record_pannel);
recordPanel = findViewById(R.id.record_panel);
recordTimeText = (TextView) findViewById(R.id.recording_time_text);
slideText = findViewById(R.id.slideText);
audioSendButton = (ImageButton) findViewById(R.id.chat_audio_send_button);
TextView textView = (TextView) findViewById(R.id.slideToCancelTextView);
textView.setText("Slide To Cancel");
//including toolbar and enabling the home button
Toolbar toolbar = (Toolbar) findViewById(R.id.app_bar);
setSupportActionBar(toolbar);
getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
findViewById(R.id.attachBtn).setOnClickListener(this);
findViewById(R.id.sendBtn).setOnClickListener(this);
findViewById(R.id.micBtn).setOnClickListener(this);
audioSendButton.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
if (motionEvent.getAction() == MotionEvent.ACTION_DOWN) {
FrameLayout.LayoutParams params = (FrameLayout.LayoutParams) slideText
.getLayoutParams();
params.leftMargin = dp(30);
slideText.setLayoutParams(params);
ViewAudioProxy.setAlpha(slideText, 1);
startedDraggingX = -1;
startRecording();
audioSendButton.getParent()
.requestDisallowInterceptTouchEvent(true);
recordPanel.setVisibility(View.VISIBLE);
} else if (motionEvent.getAction() == MotionEvent.ACTION_UP
|| motionEvent.getAction() == MotionEvent.ACTION_CANCEL) {
startedDraggingX = -1;
stopRecording();
recordPannel.setVisibility(View.GONE);
} else if (motionEvent.getAction() == MotionEvent.ACTION_MOVE) {
float x = motionEvent.getX();
if (x < -distCanMove) {
stopRecording();
}
x = x + ViewAudioProxy.getX(audioSendButton);
FrameLayout.LayoutParams params = (FrameLayout.LayoutParams) slideText
.getLayoutParams();
if (startedDraggingX != -1) {
float dist = (x - startedDraggingX);
params.leftMargin = dp(30) + (int) dist;
slideText.setLayoutParams(params);
float alpha = 1.0f + dist / distCanMove;
if (alpha > 1) {
alpha = 1;
} else if (alpha < 0) {
alpha = 0;
}
ViewAudioProxy.setAlpha(slideText, alpha);
}
if (x <= ViewAudioProxy.getX(slideText) + slideText.getWidth()
+ dp(30)) {
if (startedDraggingX == -1) {
startedDraggingX = x;
distCanMove = (recordPanel.getMeasuredWidth()
- slideText.getMeasuredWidth() - dp(48)) / 2.0f;
if (distCanMove <= 0) {
distCanMove = dp(80);
} else if (distCanMove > dp(80)) {
distCanMove = dp(80);
}
}
}
if (params.leftMargin > dp(30)) {
params.leftMargin = dp(30);
slideText.setLayoutParams(params);
ViewAudioProxy.setAlpha(slideText, 1);
startedDraggingX = -1;
}
}
view.onTouchEvent(motionEvent);
return true;
}
});
}
private void getUser() {
UsersAPI mUsersAPI = APIService.createService(UsersAPI.class, M.getToken(this));
mUsersAPI.getUser(RECIPIENT_ID, new Callback<userItem>() {
@Override
public void success(userItem userItem, retrofit.client.Response response) {
if (userItem.getName() != null) {
getSupportActionBar().setTitle(userItem.getName());
} else {
getSupportActionBar().setTitle(userItem.getUsername());
}
}
@Override
public void failure(RetrofitError error) {
}
});
}
@Override
protected void onDestroy() {
super.onDestroy();
messageAdapter.stop();
}
public void getMessages() {
M.showLoadingDialog(this);
ChatAPI mChatAPI = APIService.createService(ChatAPI.class, M.getToken(this));
mChatAPI.getMessages(CONVERSATION_ID, RECIPIENT_ID, 1, new Callback<List<MessagesItem>>() {
@Override
public void success(List<MessagesItem> messagesItems, Response response) {
mMessages = messagesItems;
messageAdapter.setMessages(messagesItems);
M.hideLoadingDialog();
}
@Override
public void failure(RetrofitError error) {
M.hideLoadingDialog();
M.L(getString(R.string.ServerError));
}
});
}
private void sendMessage() {
messageBody = messageField.getText().toString().trim();
if (!messageBody.isEmpty()) {
ChatAPI mChatAPI = APIService.createService(ChatAPI.class, M.getToken(this));
mChatAPI.addMessage(messageBody, CONVERSATION_ID, RECIPIENT_ID, new Callback<MessagesItem>() {
@Override
public void success(MessagesItem messagesItem, Response response) {
if (messagesItem != null) {
mMessages.add(messagesItem);
messageAdapter.setMessages(mMessages);
messagesList.smoothScrollToPosition(mMessages.size());
messageField.setText("");
} else {
M.T(MessagingActivity.this, getString(R.string.SomethingWentWrong));
}
}
@Override
public void failure(RetrofitError error) {
M.T(MessagingActivity.this, getString(R.string.ServerError));
}
});
}
}
@Override
public void onClick(View v) {
if (v.getId() == R.id.attachBtn) {
if (attachLayout.getVisibility() == View.GONE) {
attachLayout.setVisibility(View.VISIBLE);
} else {
attachLayout.setVisibility(View.GONE);
}
if (recordPannel.getVisibility() == View.VISIBLE) {
recordPannel.setVisibility(View.GONE);
}
} else if (v.getId() == R.id.sendBtn) {
sendMessage();
} else if (v.getId() == R.id.micBtn) {
attachLayout.setVisibility(View.GONE);
recordPannel.setVisibility(View.VISIBLE);
}
}
@Override
protected void onResume() {
super.onResume();
registerReceiver(mMessageReceiver, new IntentFilter("update_messages_list"));
}
@Override
protected void onPause() {
super.onPause();
unregisterReceiver(mMessageReceiver);
}
public void addMessage(MessagesItem newMsg) {
mMessages.add(newMsg);
messageAdapter.setMessages(mMessages);
messagesList.smoothScrollToPosition(mMessages.size());
}
private void startRecording() {
try {
startRecordingAudio();
} catch (IOException e) {
e.printStackTrace();
}
startTime = SystemClock.uptimeMillis();
timer = new Timer();
MyTimerTask myTimerTask = new MyTimerTask();
timer.schedule(myTimerTask, 1000, 1000);
vibrate();
}
private void stopRecording() {
if (timer != null) {
timer.cancel();
}
if (recordTimeText.getText().toString().equals("00:00")) {
return;
}
recordTimeText.setText("00:00");
vibrate();
Toast.makeText(getApplicationContext(), "Stop Recording", Toast.LENGTH_SHORT).show();
stopRecordingAudio();
}
public void startRecordingAudio() throws IOException {
Toast.makeText(getApplicationContext(), "Start Recording...", Toast.LENGTH_SHORT).show();
SimpleDateFormat timeStampFormat = new SimpleDateFormat(
"yyyy-MM-dd-HH.mm.ss");
String fileName = "audio_" + timeStampFormat.format(new Date())
+ ".mp3";
outFile = "/sdcard/";// Environment.getExternalStorageDirectory().getAbsolutePath();
stopRecordingAudio();
recorder = new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setOutputFile(outFile + fileName);
recorder.setOnErrorListener(errorListener);
recorder.setOnInfoListener(infoListener);
recorder.prepare();
recorder.start();
}
public void stopRecordingAudio() {
if (recorder != null) {
recorder.stop();
recorder.reset();
recorder.release();
recorder = null;
}
}
private MediaRecorder.OnErrorListener errorListener = new MediaRecorder.OnErrorListener() {
@Override
public void onError(MediaRecorder mr, int what, int extra) {
Toast.makeText(MessagingActivity.this, "Error: " + what + ", " + extra, Toast.LENGTH_SHORT).show();
}
};
private MediaRecorder.OnInfoListener infoListener = new MediaRecorder.OnInfoListener() {
@Override
public void onInfo(MediaRecorder mr, int what, int extra) {
Toast.makeText(MessagingActivity.this, "Warning: " + what + ", " + extra, Toast.LENGTH_SHORT).show();
}
};
private void vibrate() {
// TODO Auto-generated method stub
try {
Vibrator v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
v.vibrate(200);
} catch (Exception e) {
e.printStackTrace();
}
}
public static int dp(float value) {
return (int) Math.ceil(1 * value);
}
class MyTimerTask extends TimerTask {
@Override
public void run() {
timeInMilliseconds = SystemClock.uptimeMillis() - startTime;
updatedTime = timeSwapBuff + timeInMilliseconds;
final String hms = String.format(
"%02d:%02d",
TimeUnit.MILLISECONDS.toMinutes(updatedTime)
- TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS
.toHours(updatedTime)),
TimeUnit.MILLISECONDS.toSeconds(updatedTime)
- TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS
.toMinutes(updatedTime)));
long lastsec = TimeUnit.MILLISECONDS.toSeconds(updatedTime)
- TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS
.toMinutes(updatedTime));
System.out.println(lastsec + " hms " + hms);
runOnUiThread(new Runnable() {
@Override
public void run() {
try {
if (recordTimeText != null)
recordTimeText.setText(hms);
} catch (Exception e) {
// TODO: handle exception
}
}
});
}
}
}
MessagesFragment.java
public class MessagesFragment extends Fragment implements SwipeRefreshLayout.OnRefreshListener {
public RecyclerView conversationList;
public ConversationsAdapter mConversationsAdapter;
public List<ConversationItem> mConversations = new ArrayList<ConversationItem>();
public Intent mIntent = null;
public int currentPage = 1;
public LinearLayoutManager layoutManager;
private View mView;
private SwipeRefreshLayout mSwipeRefreshLayout;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
mView = inflater.inflate(R.layout.fragment_messages, container, false);
conversationList = (RecyclerView) mView
.findViewById(R.id.conversationsList);
((AppCompatActivity) getActivity()).getSupportActionBar().setTitle(R.string.title_messages);
initializeView();
conversationList.setOnScrollListener(new HidingScrollListener(layoutManager) {
@Override
public void onHide() {
}
@Override
public void onShow() {
}
@Override
public void onLoadMore(int currentPage) {
setCurrentPage(currentPage);
getConversations();
}
});
mSwipeRefreshLayout = (SwipeRefreshLayout) mView.findViewById(R.id.swipeMessages);
mSwipeRefreshLayout.setOnRefreshListener(this);
getConversations();
return mView;
}
public void initializeView() {
mConversationsAdapter = new ConversationsAdapter(getActivity(),
mConversations);
conversationList.setAdapter(mConversationsAdapter);
layoutManager = new LinearLayoutManager(getActivity());
layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
conversationList.setLayoutManager(layoutManager);
}
public void getConversations() {
M.showLoadingDialog(getActivity());
ChatAPI mChatAPI = APIService.createService(ChatAPI.class, M.getToken(getActivity()));
mChatAPI.getConversations(getCurrentPage(), new Callback<List<ConversationItem>>() {
@Override
public void success(List<ConversationItem> conversationItems, retrofit.client.Response response) {
M.L(response.getBody().mimeType());
mConversationsAdapter.setConversations(conversationItems);
M.hideLoadingDialog();
if (mSwipeRefreshLayout.isRefreshing()) {
mSwipeRefreshLayout.setRefreshing(false);
}
}
@Override
public void failure(RetrofitError error) {
M.hideLoadingDialog();
}
});
}
@Override
public void onRefresh() {
setCurrentPage(1);
getConversations();
}
public int getCurrentPage() {
return currentPage;
}
public void setCurrentPage(int currentPage) {
this.currentPage = currentPage;
}
}
答案 0 :(得分：0)
WhatsApp不是即时检查。它更像是：
Screen off, check 10x after 30s, next 10x after 1m, next 3x after 5m and so on.如果屏幕再次关闭则重新开始。当您关闭应用程序时，WhatsApp也会在后台签入。他们正在使用service.