我有一个listview，它使用游标适配器连接到数据库。它以前滚动得很好。现在它滚动缓慢并在日志中抛出此消息
I/Choreographer﹕ Skipped 115 frames! The application may be doing too much work on its main thread.
如何追踪导致缓慢的原因？
getview代码
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
context = parent.getContext();
View vi = super.getView(position, convertView, parent);
image_comment = (ImageView) vi.findViewById(R.id.outbox_comment);
image_more = (ImageView) vi.findViewById(R.id.outbox_details);
feedbackText = (TextView) vi.findViewById(R.id.outbox_feedback_text);
RelativeLayout outbox_bg = (RelativeLayout) vi.findViewById(R.id.outbox_msg_layout);
LinearLayout outbox_option = (LinearLayout) vi.findViewById(R.id.outbox_option_layout);
avatarText = (TextView) vi.findViewById(R.id.avatar_text);
avatarImage = (ImageView) vi.findViewById(R.id.avatar_image);
avatarText.setVisibility(View.GONE);
avatarImage.setVisibility(View.GONE);
myWebView = (WebView) vi.findViewById(R.id.out_webView);
myWebView.setVisibility(View.GONE);
askFeedbackAnswer = (TextView) vi.findViewById(R.id.ask_feedback_answer_text);
pollChoice1 = (TextView) vi.findViewById(R.id.poll_choice1);
pollChoice2 = (TextView) vi.findViewById(R.id.poll_choice2);
pollChoice3 = (TextView) vi.findViewById(R.id.poll_choice3);
pollChoice4 = (TextView) vi.findViewById(R.id.poll_choice4);
pollChoice5 = (TextView) vi.findViewById(R.id.poll_choice5);
lockImage = (ImageView) vi.findViewById(R.id.lock_image);
pollVisible = (ImageView) vi.findViewById(R.id.poll_visible);
starWhite1 = (ImageView) vi.findViewById(R.id.star_white_first);
starWhite2 = (ImageView) vi.findViewById(R.id.star_white_second);
starWhite3 = (ImageView) vi.findViewById(R.id.star_white_third);
starWhite4 = (ImageView) vi.findViewById(R.id.star_white_fourth);
starWhite5 = (ImageView) vi.findViewById(R.id.star_white_fifth);
greenTick1 = (ImageView) vi.findViewById(R.id.green_tick1);
greenTick2 = (ImageView) vi.findViewById(R.id.green_tick2);
greenTick3 = (ImageView) vi.findViewById(R.id.green_tick3);
greenTick4 = (ImageView) vi.findViewById(R.id.green_tick4);
greenTick5 = (ImageView) vi.findViewById(R.id.green_tick5);
final MessageThread message = MessageThreadDBAction.getMessageFromCursor(getCursor());
Resources res = context.getResources();
avatars = res.getStringArray(R.array.avatar);
avatarColors = res.getStringArray(R.array.colors);
redArray = res.getIntArray(R.array.red_array);
greenArray = res.getIntArray(R.array.green_array);
blueArray = res.getIntArray(R.array.blue_array);
int avatarIndex = message.getIcon() - 1;
int avatarColorIndex = message.getIconColor() - 1;
if (avatarIndex > 0 && avatarColorIndex > 0) {
String avatarName = avatars[avatarIndex];
String avatarColor = avatarColors[avatarColorIndex];
int avatar_id = getDrawable(context, "avatar" + (avatarIndex + 1));
int shape_id = getDrawable(context, "round" + (avatarColorIndex + 1));
avatarText.setText(avatarColor + "_" + avatarName);
avatarImage.setImageResource(avatar_id);
Drawable drawable = res.getDrawable(shape_id);
avatarImage.setBackgroundDrawable(drawable);
}
int padding_in_dp = 15; // 6 dps
final float scale = activity.getResources().getDisplayMetrics().density;
int padding_in_px = (int) (padding_in_dp * scale + 0.5f);
pollChoice1.setTypeface(null, Typeface.NORMAL);
pollChoice2.setTypeface(null, Typeface.NORMAL);
pollChoice3.setTypeface(null, Typeface.NORMAL);
pollChoice4.setTypeface(null, Typeface.NORMAL);
pollChoice5.setTypeface(null, Typeface.NORMAL);
pollChoice1.setTextSize(18);
pollChoice2.setTextSize(18);
pollChoice3.setTextSize(18);
pollChoice4.setTextSize(18);
pollChoice5.setTextSize(18);
pollChoice1.setEnabled(true);
pollChoice2.setEnabled(true);
pollChoice3.setEnabled(true);
pollChoice4.setEnabled(true);
pollChoice5.setEnabled(true);
pollChoice1.setTextColor((Color.parseColor("#838383")));
pollChoice2.setTextColor((Color.parseColor("#838383")));
pollChoice3.setTextColor((Color.parseColor("#838383")));
pollChoice4.setTextColor((Color.parseColor("#838383")));
pollChoice5.setTextColor((Color.parseColor("#838383")));
if(message.getType() == MessageThread.OUT_MESSAGE){
pollChoice1.setEnabled(false);
pollChoice2.setEnabled(false);
pollChoice3.setEnabled(false);
pollChoice4.setEnabled(false);
pollChoice5.setEnabled(false);
}
if (message.getAnswered() || (message.getType() == MessageThread.OUT_MESSAGE)) {
String answer_string = message.getAnswer();
if (message.isQuiz()) {
int correctAnswer = message.getCorrectAnswer();
if (correctAnswer == 0) {
pollChoice1.setTextColor((Color.parseColor("#838383")));
greenTick1.setVisibility(View.VISIBLE);
} else if (correctAnswer == 1) {
pollChoice2.setTextColor((Color.parseColor("#838383")));
greenTick2.setVisibility(View.VISIBLE);
} else if (correctAnswer == 2) {
pollChoice3.setTextColor((Color.parseColor("#838383")));
greenTick3.setVisibility(View.VISIBLE);
} else if (correctAnswer == 3) {
pollChoice4.setTextColor((Color.parseColor("#838383")));
greenTick4.setVisibility(View.VISIBLE);
} else if (correctAnswer == 4) {
pollChoice5.setTextColor((Color.parseColor("#838383")));
greenTick5.setVisibility(View.VISIBLE);
}
}
if (answer_string != null) {
int answer = Integer.parseInt(answer_string);
if (message.getPollType().equals("score")) {
starWhite1.setBackground(null);
starWhite2.setBackground(null);
starWhite3.setBackground(null);
starWhite4.setBackground(null);
starWhite5.setBackground(null);
if (answer == 1) {
starWhite1.setBackground(activity.getResources().getDrawable(R.drawable.textlines));
} else if (answer == 2) {
starWhite2.setBackground(activity.getResources().getDrawable(R.drawable.textlines));
} else if (answer == 3) {
starWhite3.setBackground(activity.getResources().getDrawable(R.drawable.textlines));
} else if (answer == 4) {
starWhite4.setBackground(activity.getResources().getDrawable(R.drawable.textlines));
} else if (answer == 5) {
starWhite5.setBackground(activity.getResources().getDrawable(R.drawable.textlines));
}
} else {
if (answer == 0) {
pollChoice1.setTextColor((Color.parseColor("#ffcc33")));
} else if (answer == 1) {
pollChoice2.setTextColor((Color.parseColor("#ffcc33")));
} else if (answer == 2) {
pollChoice3.setTextColor((Color.parseColor("#ffcc33")));
} else if (answer == 3) {
pollChoice4.setTextColor((Color.parseColor("#ffcc33")));
} else if (answer == 4) {
pollChoice5.setTextColor((Color.parseColor("#ffcc33")));
}
}
}
} else {
pollChoice1.setEnabled(true);
pollChoice2.setEnabled(true);
pollChoice3.setEnabled(true);
pollChoice4.setEnabled(true);
pollChoice5.setEnabled(true);
}
lockImage.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
String displayText = "This is a ";
if (message.getScope().equals("domain")) {
displayText = displayText + "public ";
} else {
displayText = displayText + "private ";
}
if (message.isQuiz()) {
displayText = displayText + "quiz";
} else {
displayText = displayText + "poll";
}
Toast toast = Toast.makeText(context.getApplicationContext(),
displayText, Toast.LENGTH_SHORT);
toast.setGravity(Gravity.CENTER_VERTICAL | Gravity.CENTER_HORIZONTAL, 0, 0);
toast.show();
}
});
pollVisible.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
String displayText = "";
if (message.getVisibility().equals("public")) {
displayText = "Aggregate answer will be visible";
} else {
displayText = "Aggregate answer will not be visible";
}
toast = Toast.makeText(context.getApplicationContext(),
displayText, Toast.LENGTH_SHORT);
toast.setGravity(Gravity.CENTER_VERTICAL | Gravity.CENTER_HORIZONTAL, 0, 0);
toast.show();
}
});
feedbackTypeIcon.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
String displayText = "";
if (message.isQuiz()) {
displayText = "This is a quiz";
} else if (message.isPoll()) {
displayText = "This is a poll";
} else {
if (message.isAskForFeedback() || (!StringUtility.isNullOrEmpty(message.getSolicitationId()) && !message.equals("null")))
{
if(message.getType() == MessageThread.IN_MESSAGE) {
String requestor[] = message.getRequestor().trim().split("@");
displayText = requestor[0]+ " is asking for feedback";
}
else{
displayText = "feedback that I have requested";
}
} else {
if(message.getType() == MessageThread.IN_MESSAGE){
displayText = "feedback received";
}
else{
displayText = "feedback sent";
}
}
}
toast = Toast.makeText(context.getApplicationContext(),
displayText, Toast.LENGTH_SHORT);
toast.setGravity(Gravity.CENTER_VERTICAL | Gravity.CENTER_HORIZONTAL, 0, 0);
toast.show();
}
});
message.setRandomcode(StringUtility.generateRandomDigits(6));
pollChoice1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if(message.getAnswered()){
if(message.getScope().equals("private") && message.getResponseCount() < 1){
showAlert("Not enough people have responded to display answers");
}
}
else{
message.setAnswered(true);
if((message.getScope().equals("private") && message.getResponseCount() > 0) || message.getScope().equals("domain")){
message.setOption1Count(message.getOption1Count() + 1);
message.setResponseCount(message.getResponseCount() + 1);
}
message.setAnswer("" + 0);
action.update(message);
}
PollReplyAsyncTask asyncTask = new PollReplyAsyncTask(activity, false, message, message.getUserId());
asyncTask.execute();
}
});
pollChoice2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if(message.getAnswered()){
if(message.getScope().equals("private") && message.getResponseCount() < 1){
showAlert("Not enough people have responded to display answers");
}
}
else{
message.setAnswered(true);
message.setAnswer("" + 1);
if((message.getScope().equals("private") && message.getResponseCount() > 0) || message.getScope().equals("domain")){
message.setOption2Count(message.getOption2Count() + 1);
message.setResponseCount(message.getResponseCount() + 1);
}
action.update(message);
}
PollReplyAsyncTask asyncTask = new PollReplyAsyncTask(activity, false, message, message.getUserId());
asyncTask.execute();
}
});
pollChoice3.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if(message.getAnswered()){
if(message.getScope().equals("private") && message.getResponseCount() < 1){
showAlert("Not enough people have responded to display answers");
}
}
else{
message.setAnswered(true);
message.setAnswer("" + 2);
if((message.getScope().equals("private") && message.getResponseCount() > 0) || message.getScope().equals("domain")){
message.setOption3Count(message.getOption3Count() + 1);
message.setResponseCount(message.getResponseCount() + 1);
}
action.update(message);
}
PollReplyAsyncTask asyncTask = new PollReplyAsyncTask(activity, false, message, message.getUserId());
asyncTask.execute();
}
});
pollChoice4.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if(message.getAnswered()){
if(message.getScope().equals("private") && message.getResponseCount() < 1){
showAlert("Not enough people have responded to display answers");
}
}
else{
message.setAnswered(true);
message.setAnswer("" + 3);
if((message.getScope().equals("private") && message.getResponseCount() > 0) || message.getScope().equals("domain")){
message.setOption4Count(message.getOption4Count() + 1);
message.setResponseCount(message.getResponseCount() + 1);
}
action.update(message);
}
PollReplyAsyncTask asyncTask = new PollReplyAsyncTask(activity, false, message, message.getUserId());
asyncTask.execute();
}
});
pollChoice5.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if(message.getAnswered()){
if(message.getScope().equals("private") && message.getResponseCount() < 1){
showAlert("Not enough people have responded to display answers");
}
}
else{
message.setAnswered(true);
message.setAnswer("" + 4);
if((message.getScope().equals("private") && message.getResponseCount() > 0) || message.getScope().equals("domain")){
message.setOption5Count(message.getOption5Count() + 1);
message.setResponseCount(message.getResponseCount() + 1);
}
action.update(message);
}
PollReplyAsyncTask asyncTask = new PollReplyAsyncTask(activity, false, message, message.getUserId());
asyncTask.execute();
}
});
starWhite1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (!message.getAnswered()) {
message.setAnswered(true);
message.setAnswer("" + 1);
if((message.getScope().equals("private") && message.getResponseCount() > 0) || message.getScope().equals("domain")){
message.setOption1Count(message.getOption1Count() + 1);
message.setResponseCount(message.getResponseCount() + 1);
}
action.update(message);
}
else{
if(message.getScope().equals("private") && message.getResponseCount() < 1){
showAlert("Not enough people have responded to display answers");
}
}
PollReplyAsyncTask asyncTask = new PollReplyAsyncTask(activity, false, message, message.getUserId());
asyncTask.execute();
}
});
starWhite2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (!message.getAnswered()) {
message.setAnswered(true);
message.setAnswer("" + 2);
if((message.getScope().equals("private") && message.getResponseCount() > 0) || message.getScope().equals("domain")){
message.setOption2Count(message.getOption2Count() + 1);
message.setResponseCount(message.getResponseCount() + 1);
}
action.update(message);
}
else{
if(message.getScope().equals("private") && message.getResponseCount() < 1){
showAlert("Not enough people have responded to display answers");
}
}
PollReplyAsyncTask asyncTask = new PollReplyAsyncTask(activity, false, message, message.getUserId());
asyncTask.execute();
}
});
starWhite3.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (!message.getAnswered()) {
message.setAnswered(true);
message.setAnswer("" + 3);
if((message.getScope().equals("private") && message.getResponseCount() > 0) || message.getScope().equals("domain")){
message.setOption3Count(message.getOption3Count() + 1);
message.setResponseCount(message.getResponseCount() + 1);
}
action.update(message);
}
else{
if(message.getScope().equals("private") && message.getResponseCount() < 1){
showAlert("Not enough people have responded to display answers");
}
}
PollReplyAsyncTask asyncTask = new PollReplyAsyncTask(activity, false, message, message.getUserId());
asyncTask.execute();
}
});
starWhite4.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (!message.getAnswered()) {
message.setAnswered(true);
message.setAnswer("" + 4);
if((message.getScope().equals("private") && message.getResponseCount() > 0) || message.getScope().equals("domain")){
message.setOption4Count(message.getOption4Count() + 1);
message.setResponseCount(message.getResponseCount() + 1);
}
action.update(message);
}
else{
if(message.getScope().equals("private") && message.getResponseCount() < 1){
showAlert("Not enough people have responded to display answers");
}
}
PollReplyAsyncTask asyncTask = new PollReplyAsyncTask(activity, false, message, message.getUserId());
asyncTask.execute();
}
});
starWhite5.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (!message.getAnswered()) {
message.setAnswered(true);
message.setAnswer("" + 5);
if((message.getScope().equals("private") && message.getResponseCount() > 0) || message.getScope().equals("domain")){
message.setOption5Count(message.getOption5Count() + 1);
message.setResponseCount(message.getResponseCount() + 1);
}
action.update(message);
}
else{
if(message.getScope().equals("private") && message.getResponseCount() < 1){
showAlert("Not enough people have responded to display answers");
}
}
PollReplyAsyncTask asyncTask = new PollReplyAsyncTask(activity, false, message, message.getUserId());
asyncTask.execute();
}
});
emailCount.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(activity.getApplicationContext(), RecipientListActivity.class);
i.putExtra(AppConstants.INTENT_VALUE_USERID, message.getUserId());
i.putExtra(AppConstants.INTENT_VALUE_THREADID, message.getThreadId());
activity.startActivity(i);
}
});
askFeedbackAnswer.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(activity.getApplicationContext(),
InboxDetailActivity.class);
i.putExtra(AppConstants.INTENT_VALUE_USERID,
message.getUserId());
i.putExtra(AppConstants.INTENT_VALUE_THREADID,
message.getThreadId());
i.putExtra(AppConstants.INTENT_VALUE_THREADTYPE,
message.getType());
i.putExtra("curs", String.valueOf((Integer) v.getTag()));
i.putExtra("TYPE_COMMENT", "true");
activity.startActivity(i);
}
});
if (message.getType() == MessageThread.OUT_MESSAGE) {
// outbox_bg.setPadding(padding_in_px, padding_in_px, padding_in_px, padding_in_px);
image_like = (ImageView) vi.findViewById(R.id.outbox_like);
image_dislike = (ImageView) vi.findViewById(R.id.outbox_dislike);
image_like.setEnabled(false);
image_dislike.setEnabled(false);
myWebView.setVisibility(View.GONE);
outbox_option.setVisibility(View.VISIBLE);
feedbackText.setVisibility(View.VISIBLE);
image_more.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (!message.isPoll()) {
if (message.isClosed()) {
AppUtils.showError(activity,
"This thread has been closed");
} else if (message.isBlocked()) {
AppUtils.showError(activity,
"This thread has been blocked");
} else {
showContextMenu(message, v);
}
}
}
});
image_comment.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (message.isClosed()) {
AppUtils.showError(activity,
"This thread has been closed");
} else if (message.isBlocked()) {
AppUtils.showError(activity,
"This thread has been blocked");
} else {
Intent i = new Intent(activity.getApplicationContext(),
OutboxDetailActivity.class);
i.putExtra(AppConstants.INTENT_VALUE_USERID,
message.getUserId());
i.putExtra(AppConstants.INTENT_VALUE_THREADID,
message.getThreadId());
i.putExtra(AppConstants.INTENT_VALUE_THREADTYPE,
message.getType());
i.putExtra("VIA_COMMENT", true);
int purpose = getCursor().getPosition();
// purpose=purpose+1;
i.putExtra("curs", String.valueOf(purpose));
i.putExtra("TYPE_COMMENT", "true");
activity.startActivity(i);
}
}
});
} else {
myWebView.setVisibility(View.GONE);
outbox_option.setVisibility(View.VISIBLE);
feedbackText.setVisibility(View.VISIBLE);
image_like = (ImageView) vi.findViewById(R.id.outbox_like);
image_dislike = (ImageView) vi.findViewById(R.id.outbox_dislike);
if (!message.isPoll() && !message.isAskForFeedback()) {
image_like.setVisibility(View.VISIBLE);
image_dislike.setVisibility(View.VISIBLE);
image_like.setEnabled(true);
image_dislike.setEnabled(true);
} else {
image_like.setVisibility(View.
}
}
return vi;
}
答案 0 :(得分：0)
在UI线程上使用Run。
RN = ROW_NUMBER() OVER(ORDER BY N)答案 1 :(得分：0)
try adding following two lines into xml code android:fastScrollEnabled="true" android:smoothScrollbar="true"
答案 2 :(得分：0)
首先介绍持有人模式。我不打算更改你的代码，因为它有很多，但我在下面发布一个示例。通过引入支架模式，您将只对布局进行一次充气，并消除CPU浪费findViewByIds
public class DemosAdapter extends BaseAdapter {
public List<ActivityItem> listOfItems;
private View v;
private ViewWrapper wrapper;
private Context context;
public DemosAdapter(Context c, List<ActivityItem> listOfItems) {
this.context = c;
this.listOfItems = listOfItems;
}
@Override
public int getCount() {
return listOfItems.size();
}
@Override
public ActivityItem getItem(int i) {
return listOfItems.get(i);
}
@Override
public long getItemId(int i) {
return 0;
}
public void sort() {
Collections.sort(listOfItems, new Comparator<ActivityItem>() {
@Override
public int compare(ActivityItem activityItem, ActivityItem activityItem2) {
return activityItem.getName().compareTo(activityItem2.getName());
}
});
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ActivityItem itm = listOfItems.get(position);
v = convertView;
if (v == null) {
// This happens when it is not yet inflated
LayoutInflater inflater = LayoutInflater.from(context);
v = inflater.inflate(R.layout.activity_item, null, false);
wrapper = new ViewWrapper(v);
v.setTag(wrapper);
}
else {
// Recycle the row item
wrapper = (ViewWrapper) v.getTag();
}
// Use the recycled holder or the just inflated one
wrapper.getTvDemoName().setText(itm.getName());
return v;
}
/**
* This is the view holder class. It holds all the fields you need in your ListView
* so you need to add all your images views and stuff you need to this guy
* **/
private class ViewWrapper {
private View base;
private TextView tvDemoName;
public ViewWrapper(View v) {
this.base = v;
}
public TextView getTvDemoName() {
if (tvDemoName == null) {
tvDemoName = (TextView) base.findViewById(R.id.tvDemoName);
}
return tvDemoName;
}
}
}
您似乎正在加载大量图片。加载图像是一个缓慢的过程，您应该在UI线程中执行此操作。但这是一个更复杂的过程，你应该只在遇到问题时才这样做。
接下来的事情......不要在ListView getView中执行DB I / O，因为这会阻止您的UI线程，从而降低性能。当你装配适配器然后将所有内容保存在内存中时，只需执行一次。