键盘打开时，listview更改为默认值 [英] listview change to default when keyboard opens
本文介绍了键盘打开时，listview更改为默认值的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
在列表视图中，当列表加载完成并完成下载时，文本和图像均包含默认图像，一切正常，但是当键盘打开下载的图像时，默认图像变为默认图像. 公共类ChatScreen扩展Activity实现OnClickListener {
In a list view i have image, text and image contains default image when list load with download complete , every thing works fine but when keyboard opens the downloaded image change to default image. public class ChatScreen extends Activity implements OnClickListener {
private void stopTimer()
{
if (mTimer1 != null)
{
mTimer1.cancel();
mTimer1.purge();
}
}
private void startTimer()
{
mTimer1 = new Timer();
mTt1 = new TimerTask()
{
public void run()
{
mTimerHandler.post(new Runnable()
{
public void run()
{
try
{
Date date1 = getDate(time);
Date date2 = getDate(getCurrentTime());
if (date2.getTime() - date1.getTime() == 5000)
{
stopTimer();
try
{
chat.setCurrentState(ChatState.paused,
chatWithJID, FromChatJID);
} catch (XMPPException e)
{
e.printStackTrace();
}
isTyping = false;
}
else if (date2.getTime() - date1.getTime() > 30000)
{
time = getCurrentTime();
try
{
chat.setCurrentState(ChatState.gone,
chatWithJID, FromChatJID);
} catch (XMPPException e)
{
e.printStackTrace();
}
isTyping = false;
}
}
catch (ParseException e)
{
e.printStackTrace();
}
catch(IllegalStateException e)
{
e.printStackTrace();
}
}
});
}
};
mTimer1.schedule(mTt1, 00, 5000);
}
@Override
protected void onPause()
{
super.onPause();
chat.setChatFragment(null);
System.out.println("onPasue called");
}
}
}
}
}
}
@Override
protected void onResume()
{
super.onResume();
session.saveCurrentName(this.getLocalClassName());
chat.setChatFragment(ctx);
System.out.println("onResume called");
if(checkForCurfew())
showHideView(true, 0);
else
showHideView(false, 0);
}
public void showHideView(final boolean value, final int type)
{
System.out.println("Called");
runOnUiThread(new Runnable()
{
@Override
public void run()
{
if(value)
{
btnSend.setEnabled(value);
btnSend.setAlpha(1.0f);
inputMessage.setEnabled(value);
btnSticker.setEnabled(value);
btnSticker.setAlpha(1.0f);
btnPicture.setEnabled(value);
btnPicture.setAlpha(1.0f);
doodle_btn.setEnabled(value);
doodle_btn.setAlpha(1.0f);
}
else
{
btnSend.setEnabled(value);
btnSend.setAlpha(0.5f);
inputMessage.setEnabled(value);
btnSticker.setEnabled(value);
btnSticker.setAlpha(0.5f);
btnPicture.setEnabled(value);
btnPicture.setAlpha(0.5f);
doodle_btn.setEnabled(value);
doodle_btn.setAlpha(0.5f);
}
if(!value && type == 0)
inputMessage.setHint("You can't chat during a curfew");
else if(!value && type == 1)
inputMessage.setHint("Can’t Access Internet");
else
inputMessage.setHint("Enter message here");
}
});
}
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
System.gc();
setContentView(R.layout.activity_fragment_chat);
System.out.println("Chat screen called.");
mcon = ChatScreen.this;
chat = ((RooChat) getApplication()).chat;
Bundle bundle = getIntent().getBundleExtra("bundle_data");
System.out.println("bundle- " + bundle);
chatWithJID = bundle.getString("chat_with");
chatWithName = bundle.getString("kid_name");
FromChatJID = bundle.getString("chat_from");
ChatRoomName = bundle.getString("chat_room");
indexOfChatRoom = Integer.parseInt(bundle.getString("index"));
CopyindexOfChatRoom = indexOfChatRoom;
typeFaceCurseCasual = AppFonts.getFont(mcon, AppFonts.CurseCasual);
typeFaceARLRDBDHand = AppFonts.getFont(mcon, AppFonts.ARLRDBDHand);
back = (Button) findViewById(R.id.back);
sendBtn=(Button)findViewById(R.id.send);
sendBtn.setOnClickListener(this);
erasebtn=(Button)findViewById(R.id.erase);
erasebtn.setOnClickListener(this);
smallers=(Button)findViewById(R.id.small_ers1);
smallers.setOnClickListener(this);
mediumers=(Button)findViewById(R.id.medium_ers1);
mediumers.setOnClickListener(this);
largeers=(Button)findViewById(R.id.large_ers1);
largeers.setOnClickListener(this);
smallline=(Button)findViewById(R.id.small);
smallline.setOnClickListener(this);
mediumline=(Button)findViewById(R.id.medium);
mediumline.setOnClickListener(this);
largeline=(Button)findViewById(R.id.large);
largeline.setOnClickListener(this);
back1=(Button)findViewById(R.id.back1);
back1.setOnClickListener(this);
drawView=(DrawingView)findViewById(R.id.Drawing);
doodle_btn=(Button)findViewById(R.id.doodle_btn);
doodle_btn.setOnClickListener(this);
doodle=(LinearLayout) findViewById(R.id.doodle);
back.setOnClickListener(this);
init();
String available = convertAvailability(chat.getUserAvailability(chatWithJID));
if (chatWithName.equalsIgnoreCase("echo") || chatWithName.equalsIgnoreCase("puzzle")
|| chatWithName.equalsIgnoreCase("msr"))
{
image.setImageResource(R.drawable.status_active);
}
else if (available.equalsIgnoreCase("offline"))
{
chat.sendIQForLastSeen(chatWithJID);
image.setImageResource(R.drawable.status_offline);
}
else
{
// chatState.setText(available);
image.setImageResource(R.drawable.status_active);
}
inputMessage.addTextChangedListener(new TextWatcher()
{
@Override
public void onTextChanged(CharSequence s, int start, int before, int count)
{
if (chat.isConnected())
{
try
{
time = getCurrentTime();
}
catch (ParseException e1)
{
e1.printStackTrace();
}
if (isTyping == false)
{
try
{
chat.setCurrentState(ChatState.composing, chatWithJID, FromChatJID);
isTyping = true;
startTimer();
}
catch (XMPPException e)
{
e.printStackTrace();
}
}
else if (isTyping == true)
{
stopTimer();
startTimer();
}
}
/*else
Toast.makeText(getApplicationContext(), "Please wait, connecting to server.", 0).show();
*/
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after)
{
}
@Override
public void afterTextChanged(Editable s)
{
}
});
inputMessage.setOnFocusChangeListener(new OnFocusChangeListener()
{
@Override
public void onFocusChange(final View v, final boolean hasFocus)
{
if (hasFocus && inputMessage.isEnabled() && inputMessage.isFocusable())
new Runnable()
{
@Override
public void run()
{
final InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.showSoftInput(inputMessage, InputMethodManager.SHOW_IMPLICIT);
}
};
}
});
data = session.getUserDetails();
banned = session.getBannedWord();
System.out.println(banned);
JSONArray jsonArray;
if(!banned.equals(""))
{
try
{
jsonArray = new JSONArray(banned);
strArr = new String[jsonArray.length()];
for (int i = 0; i < jsonArray.length(); i++)
{
strArr[i] = jsonArray.getString(i);
}
//System.out.println(Arrays.toString(strArr));
}
catch (JSONException e)
{
e.printStackTrace();
}
}
}
}
public void reFreshData()
{
indexOfChatRoom = db.getChatRoomIndex(chatWithName);
messages = db.getFriendChat(indexOfChatRoom);
adapter = new ChatMessageAdapter(mcon, messages);
chatList.setAdapter(adapter);
}
private void init()
{
db = new DatabaseHelper(mcon);
ctx = this;
chat.setChatFragment(ctx);
session = new SessionManager(mcon);
chatList = (ListView) findViewById(R.id.chatList);
chatWith = (TextView) findViewById(R.id.chat_with);
doodle_txt = (TextView) findViewById(R.id.doodle_txt);
chatState = (TextView) findViewById(R.id.chat_status);
btnPicture = (TextView) findViewById(R.id.picture);
btnPicture.setOnClickListener(this);
btnSticker = (TextView) findViewById(R.id.sticker);
btnSticker.setOnClickListener(this);
btnExtra = (TextView) findViewById(R.id.extra);
btnExtra.setOnClickListener(this);
btnSend = (TextView) findViewById(R.id.btn_send);
btnSend.setTypeface(typeFaceARLRDBDHand, Typeface.BOLD);
btnSend.setOnClickListener(this);
inputMessage = (EditText) findViewById(R.id.et_message);
inputMessage.setTypeface(typeFaceCurseCasual);
chatWith.setText(chatWithName);
image = (ImageView) findViewById(R.id.img_chat_status);
cross = (ImageView) findViewById(R.id.cross);
cross.setOnClickListener(this);
lay_sticker_main = (LinearLayout) findViewById(R.id.lay_sticker_main);
lay_sticker_child = (FlowLayout) findViewById(R.id.lay_sticker_child);
lay_sticker_group = (FlowLayout) findViewById(R.id.lay_sticker_group);
reFreshData();
chatList.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, final View arg1, final int arg2,
long arg3) {
// TODO Auto-generated method stub
final ChatMessage msg=adapter.getItem(arg2);
final ImageView btn = (ImageView) arg1.findViewById(R.id.textView1);
final ImageView imgone = (ImageView)arg1.findViewById(R.id.imagev);
try{
if(!btn.getTag().toString().equals("")){
Log.v("","msg getting:..."+btn.getTag().toString());
DownloadImage di=new DownloadImage(ChatScreen.this, btn.getTag().toString(), new BitmapAsyncTaskCompleteListener() {
@Override
public void onTaskComplete(Bitmap result) {
// TODO Auto-generated method stub
Log.v("Img :",""+result);
imgone.setImageBitmap(result);
String filePath=saveImage(result,msg.getId(),msg.getFrom());
btn.setVisibility(View.GONE);
btn.setTag(filePath);
final int index = chatList.getFirstVisiblePosition();
View v = chatList.getChildAt(0);
final int top = (v == null) ? 0 : v.getTop();
Log.v("", "top :.."+top);
chatList.post(new Runnable() {
@Override
public void run() {
chatList.setSelectionFromTop(index,top);
}
});
}
});
di.execute();
}
}
catch(Exception ex){
btn.setVisibility(View.GONE);
btn.setTag("");
}
}
});
handler = new Handler(Looper.getMainLooper())
{
@Override
public void handleMessage(Message msg)
{
super.handleMessage(msg);
switch (msg.what)
{
case REFRESH_CHAT_LIST:
adapter.notifyDataSetChanged();
break;
case REFRESH_CHAT_STATUS:
if(text != null)
{
try
{
if (isNumeric(text))
{
chatState.setText(calculateTime(Long.parseLong(text)));
image.setImageResource(R.drawable.status_offline);
}
else
{
chatState.setText(text);
if (chatWithName.equalsIgnoreCase("echo")
|| chatWithName.equalsIgnoreCase("puzzle")
|| chatWithName.equalsIgnoreCase("msr")) {
image.setImageResource(R.drawable.status_active);
} else if (text.equalsIgnoreCase("offline")) {
chat.sendIQForLastSeen(chatWithJID);
image.setImageResource(R.drawable.status_offline);
} else {
image.setImageResource(R.drawable.status_active);
}
}
}
catch(NumberFormatException e)
{
image.setImageResource(R.drawable.status_offline);
e.printStackTrace();
}
}
break;
case REFRESH_MESSAGE_DELIVERY:
adapter.notifyDataSetChanged();
break;
default:
break;
}
}
};
}String filePath ="";
private String saveImage(Bitmap finalBitmap,int chatWith,String from) {
String fileName = chat.getCurrentDateTime();
//msg = "You got a photo. Display of photo will be added in next version of this app.";
final File dir = new File(Environment.getExternalStorageDirectory()
.getAbsolutePath(), "/roo_kids/images/" + from + "/");
if (!dir.exists())
{
dir.mkdirs();
}
final File myFile = new File(dir, fileName + ".png");
if (!myFile.exists())
{
try
{
myFile.createNewFile();
}
catch (IOException e)
{
e.printStackTrace();
}
}
try {
FileOutputStream out = new FileOutputStream(myFile);
finalBitmap.compress(Bitmap.CompressFormat.PNG, 90, out);
out.flush();
out.close();
} catch (Exception e) {
e.printStackTrace();
}
filePath= myFile.getAbsolutePath()+"::images::";
Log.v("","filePath after decoding:.."+filePath);
Log.v("","chatWith Id after decoding:.."+chatWith);
Log.v("","from after decoding:.."+from);
db.updateFriendChat(chatWith,filePath);
return filePath;
}
public void getAllFiles(String directoryName)
{
}
public boolean isFileExist(String directoryName, String filename)
{
}
@Override
public void onClick(View v)
{
switch (v.getId())
{
case R.id.picture:
openGallery();
break;
case R.id.extra:
break;
case R.id.btn_send:
sendMessageAndValidate();
break;
case R.id.back:
onBackPressed();
break;
default:
break;
}
}
private void openGallery()
{
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
//intent.putExtra(Intent.EXTRA_LOCAL_ONLY, true);
startActivityForResult(intent, SELECT_PICTURE);
}
private String encodeFileToBase64Binary(String path)throws IOException, FileNotFoundException
{
}
String cond="";
public class ExecuteImageSharingProcess extends AsyncTask<String, Integer, String>
{
String base64 = "";
ProgressDialog pd = null;
@Override
protected void onPreExecute()
{
super.onPreExecute();
pd = new ProgressDialog(ChatScreen.this);
pd.setCancelable(false);
pd.setMessage("Please wait..");
pd.show();
}
@Override
protected String doInBackground(String... params)
{
try
{
//base64 = encodeFileToBase64Binary(params[0]);
Log.v("", "params[0].."+params[0]);
byte[] data = params[0].getBytes("UTF-8");
base64= new String(data);
Log.v("", "base64.."+base64);
return "yes";
}
catch (IOException e)
{
e.printStackTrace();
return "no";
}
catch(NullPointerException e)
{
return "no";
}
}
@Override
protected void onPostExecute(String result)
{
super.onPostExecute(result);
if(result.equals("yes"))
{
if(chat.isConnected())
{
String prefix = chat.generateRandomChar()+"imagePrefixEnd";
System.out.println("prefix-> "+prefix);
ctx.moveMessagetoXMPP(prefix + base64 + "::images::", 1);
base64 = "";
bitmap = null;
}
}
else
{
Toast.makeText(ctx, "File not found.", Toast.LENGTH_LONG).show();
}
try
{
if ((this.pd != null) && this.pd.isShowing())
{
this.pd.dismiss();
}
} catch (final IllegalArgumentException e)
{
} catch (final Exception e)
{
} finally
{
this.pd = null;
}
}
}
String imgDecodableString = null;
String imgbase64="";
AlertManager alert_dialog;
@Override
public void onActivityResult(int requestCode, int resultCode, Intent i)
{
super.onActivityResult(requestCode, resultCode, i);
try
{
if (requestCode == SELECT_PICTURE && resultCode == RESULT_OK && null != data)
{
String urlofimage=""; // here i send base64 image to server and it will returns url of image that is send in ExecuteImageSharingProcess method.
new ExecuteImageSharingProcess().execute(urlofimage);
}
});
ucIA.execute();
}
}
else if (resultCode == Activity.RESULT_CANCELED)
{
bitmap = null;
}
} catch (Exception e)
{
Toast.makeText(this, "Something went wrong", Toast.LENGTH_LONG).show();
}
}
private void sendMessageAndValidate()
{
String msg=inputMessage.getText().toString().replace(" ","");
String msgone=msg.replace("\n", "");
if (msgone.length() > 0)
{
if (chat.isConnected())
{
ctx.moveMessagetoXMPP(inputMessage.getText().toString(), 0);
inputMessage.setText("");
stopTimer();
}
}
}
String thread="";
protected void moveMessagetoXMPP(String msg, final int type)
{
data = session.getUserDetails();
if (checkChatRoomAvailablity(chatWithName))
{
thread = db.getThreadFromChatroom(chatWithName);
}
if (thread.equals(""))
thread = ChatRoomName;
chat.sendMesage(indexOfChatRoom, msg, FromChatJID, chatWithJID, thread, type);
try
{
chat.setCurrentState(ChatState.paused, chatWithJID, FromChatJID);
}
catch (XMPPException e)
{
e.printStackTrace();
}
}
public class MyThread implements Runnable
{
String message;
File file;
public MyThread(String message, File file)
{
this.message = message;
this.file = file;
}
@Override
public void run()
{
String fileName;
if(message.contains("::images::"))
fileName = saveFile(decodeBase64(message.substring(message.indexOf("imagePrefixEnd")+14, message.indexOf("::images::"))), file);
else
fileName = saveFile(decodeBase64(message.substring(message.indexOf("imagePrefixEnd")+14, message.indexOf("::doodle::"))), file);
}
}
public void appendMessageInListView(long _id)
{
if (messages.size() > 0)
{
System.out.println(messages.get(messages.size() - 1).getId());
ChatMessage cm = db.getFriendChatMessage(indexOfChatRoom, ""+ messages.get(messages.size() - 1).getId());
messages.add(messages.size(), cm);
}
else
{
ChatMessage cm = db.getFriendChatMessage(indexOfChatRoom, "" + _id);
messages.add(messages.size(), cm);
}
refreshChatList();
}
public void refreshChatList()
{
int state = REFRESH_CHAT_LIST;
Message msg = handler.obtainMessage(state);
msg.sendToTarget();
}
public void refreshChatStatus() {
int state = REFRESH_CHAT_STATUS;
Message msg = handler.obtainMessage(state);
msg.sendToTarget();
}
public int getChatIndex2(String participant) {
return db.getChatRoomIndex(participant);
}
ImageView img;
View oldview;
public class ChatMessageAdapter extends BaseAdapter
{
public ArrayList<ChatMessage> messages;
private Context ctx;
public ChatMessageAdapter(Context ctx, ArrayList<ChatMessage> messages)
{
this.ctx = ctx;
this.messages = messages;
}
@Override
public int getCount()
{
return messages.size();
}
@Override
public long getItemId(int arg0)
{
return arg0;
}
@Override
public View getView(int position, View oldView, ViewGroup parent)
{
if (ctx == null)
return oldView;
final ChatMessage msg = getItem(position);
if (oldView == null || (((Integer) oldView.getTag()) != msg.getIsOutgoing()))
{
LayoutInflater inflater = (LayoutInflater) getLayoutInflater();
if (msg.getIsOutgoing() == MyMessage.OUTGOING_ITEM)
{
oldView = inflater.inflate(R.layout.fragment_message_outgoing_item, null);
oldView.setTag(MyMessage.OUTGOING_ITEM);
}
else
{
oldView = inflater.inflate(R.layout.fragment_message_ingoing_item, null);
oldView.setTag(MyMessage.INGOING_ITEM);
}
}
TextView message = (TextView) oldView.findViewById(R.id.msg);
message.setTypeface(typeFaceCurseCasual);
LinearLayout lay_txt = (LinearLayout) oldView.findViewById(R.id.lay_txt);
LinearLayout lay_img = (LinearLayout) oldView.findViewById(R.id.lay_img);
img = (ImageView) oldView.findViewById(R.id.imagev);
FrameLayout fmlay=(FrameLayout) oldView.findViewById(R.id.fmlay);
ImageView textView1 = (ImageView) oldView.findViewById(R.id.textView1);
ImageView imgSticker = (ImageView) oldView.findViewById(R.id.img_sticker);
ImageView tickSent = (ImageView) oldView.findViewById(R.id.tickSent);
ImageView tickDeliver = (ImageView) oldView.findViewById(R.id.tickDeliver);
TextView timestamp = (TextView) oldView.findViewById(R.id.timestamp);
oldview=oldView;
timestamp.setTypeface(typeFaceCurseCasual);
message.setText(msg.getMessage());
System.out.println("message in adapter");
if (msg.getIsOutgoing() == MyMessage.OUTGOING_ITEM)
tickSent.setVisibility(View.VISIBLE);
else
tickSent.setVisibility(View.INVISIBLE);
if (msg.getIsDeliver() == true)
tickDeliver.setVisibility(View.VISIBLE);
else
tickDeliver.setVisibility(View.INVISIBLE);
if(msg.getTimeStamp()!= null) timestamp.setText(getTimeAgo(Long.parseLong(msg.getTimeStamp()),ctx));
if(msg.getMessage()!= null)
{
if(msg.getMessage().contains("::sticker::"))
{
lay_img.setVisibility(View.GONE);
lay_txt.setVisibility(View.GONE);
imgSticker.setVisibility(View.VISIBLE);
String Dir = msg.getMessage().substring(2, msg.getMessage().indexOf("-"));
String file = msg.getMessage().substring(2, msg.getMessage().indexOf("}}"));
if(isFileExist(Dir, file))
{
String path = ctx.getFilesDir() + "/booksFolder/"+Dir+"/"+file;
System.out.println("path- "+ path);
Uri imgUri = Uri.parse("file://"+path);
imgSticker.setImageURI(imgUri);
}
else
{
String url = "http://s3.amazonaws.com/rk-s-0ae8740/a/"+file;
System.out.println(url);
new ImageLoaderWithImageview(mcon).DisplayImage(url, imgSticker);
}
}
else if(!msg.getMessage().contains("::images::") && !msg.getMessage().contains("::doodle::"))
{
System.out.println("in text condition");
lay_img.setVisibility(View.GONE);
imgSticker.setVisibility(View.GONE);
lay_txt.setVisibility(View.VISIBLE);
System.out.println("msg coming :"+msg.getMessage());
message.setText(msg.getMessage());
}
else
{
lay_txt.setVisibility(View.GONE);
imgSticker.setVisibility(View.GONE);
lay_img.setVisibility(View.VISIBLE);
if (msg.getIsOutgoing() == MyMessage.INGOING_ITEM)
{
fmlay.setVisibility(View.VISIBLE);
}
Log.v("","msg getting:..."+msg.getMessage());
String pathOne = null ;
if(msg.getMessage().contains("imagePrefixEnd")){
Log.v("In images/doddle if", "askfk");
pathOne="default";
textView1.setVisibility(View.VISIBLE);
String imgpath=setdefaultImage(msg.getMessage());
textView1.setTag(imgpath);
}
else {
Log.v("In images else", "askfk");
try{
pathOne = msg.getMessage().substring(0, msg.getMessage().indexOf("::images::"));
}
catch(Exception ex){
pathOne = msg.getMessage().substring(0, msg.getMessage().indexOf("::doodle::"));
}
textView1.setVisibility(View.GONE);
Bitmap bitmap=setImage(pathOne);
img.setImageBitmap(bitmap);
textView1.setTag("");
}
}
}
return oldview;
}
@Override
public ChatMessage getItem(int position)
{
return messages.get(position);
}
}
public String setdefaultImage(String msg){
Bitmap bImage = BitmapFactory.decodeResource(ChatScreen.this.getResources(), R.drawable.dummyimage);
img.setImageBitmap(bImage);
String urlpath="";
try{
urlpath = msg.substring(0, msg.indexOf("::images::"));
}
catch(Exception ex){
urlpath = msg.substring(0, msg.indexOf("::doodle::"));
}
//Log.v("","msg getting:..."+urlpath);
String pt[]=urlpath.split("PrefixEnd");
//System.out.println("path :"+pt[1]);
return pt[1];
}
public Bitmap setImage(String pathOne){
Bitmap bitmap=null;
File imgFile = new File(pathOne);
//Log.v("","msg image path:..."+pathOne);
if(imgFile.exists())
{
//Log.v("","msg path exits:...");
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 3;
bitmap= BitmapFactory.decodeFile(pathOne, options);
}
else{
}
return bitmap;
}
}
推荐答案
为什么不尝试使用RecyclerView而不是ListView并使用Fresco图像库?
Why not try RecyclerView instead of ListView and use Fresco Image Library?
这篇关于键盘打开时，listview更改为默认值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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