我目前正在开发一个用户可以将日志发布到项目的应用程序。然而，似乎我遇到了一个问题，似乎无法找到答案。用户发帖后，后退按钮不会关闭日志活动。相反，它会使应用程序无响应;来自这样一个实例的logcat位于底部。但是，单击“等待”而不是“强制关闭”将恢复应用程序，但后退按钮仍然无效。以下是活动的布局。 viewflipper中的每个视图都是项目的不同日志，其中包含几个用于填写信息的edittexts和一个用于发布到日志的按钮。最初，这是在列表视图中的帖子按钮下方显示当前帖子的位置。此时，后退按钮具有完整功能。但是，scrollview中的listview不能很好地工作，因此必须将其更改为带有listview的滑动抽屉，每次用户在日志之间翻转时，都会更改其适配器。这是后退按钮功能丢失的地方。起初我以为我在onKeyDown方法中做错了，但在尝试调试它之后，修改它，甚至删除它，我发现它永远不会被调用。因为这在我换成滑动抽屉后开始发生，我的结论是它与滑动抽屉有关。对此有任何帮助将非常感激。
编辑：在彻底探索了这个问题之后，我发现这不仅仅是后退按钮。设置按钮和搜索按钮也都表现出这种行为。显示正确功能的唯一按钮是主页按钮。但是，活动中的功能不受影响。我仍然可以在视图之间发布，翻转，查看和编辑帖子。
<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/iphonebg" >
<TableRow
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0"
android:background="@drawable/toolbar_gradient"
android:gravity="center_vertical" >
<!-- Header -->
</TableRow>
<TableRow
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0" >
<!-- Date -->
</TableRow>
<TableRow
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0" >
<!-- Tabs -->
</TableRow>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_gravity="center" >
<TableLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/iphonebg" >
<TableRow
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1" >
<ViewFlipper
android:id="@+id/ViewFlipper01"
android:layout_width="0dip"
android:layout_height="fill_parent"
android:layout_weight="2" >
<!-- adding views to ViewFlipper -->
<!-- ScrollView 1 -->
<!-- ScrollView 2 -->
<!-- ScrollView 3 -->
<!-- ScrollView 4 -->
<!-- ScrollView 5 -->
</ViewFlipper>
</TableRow>
</TableLayout>
<SlidingDrawer
android:id="@+id/drawer"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:content="@+id/anyPosts"
android:handle="@+id/handle" >
<Button
android:id="@+id/handle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:minHeight="35dip"
android:background="@drawable/black_btn_bg"
android:text="Drag or Tap to View Posts"
android:textColor="#FFFFFF"
android:textStyle="bold" />
<ListView
android:id="@+id/anyPosts"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:paddingLeft="5dip"
android:paddingRight="5dip" >
</ListView>
</SlidingDrawer>
</FrameLayout>
</TableLayout>
处理滑动抽屉的代码范围，位于我的onCreate方法中：
final SlidingDrawer slide = (SlidingDrawer) findViewById(R.id.drawer);
final Button btnDownloads = (Button) findViewById(R.id.handle);
slide.setOnDrawerOpenListener(new OnDrawerOpenListener() {
@Override
public void onDrawerOpened() {
btnDownloads.setText("Drag or Tap to Close Posts");
}
});
slide.setOnDrawerCloseListener(new OnDrawerCloseListener() {
@Override
public void onDrawerClosed() {
btnDownloads.setText("Drag or Tap to View Posts");
}
});
slide.animateOpen();
处理listview的代码范围：
ListView listToFill = (ListView) findViewById(R.id.anyPosts);
listToFill.setAdapter(listViewAdapter);
logcat的：
06-07 13:51:44.394: I/InputDispatcher(1464): Application is not responding: AppWindowToken{40cd7758 token=HistoryRecord{40534788 uda.projectlogging/.Radio_Group}} - Window{40ae0a88 uda.projectlogging/uda.projectlogging.Radio_Group paused=false}. 10009.8ms since event, 10009.4ms since wait started
06-07 13:51:44.394: I/WindowManager(1464): Input event dispatching timed out sending to uda.projectlogging/uda.projectlogging.Radio_Group
06-07 13:51:44.444: I/Process(1464): Sending signal. PID: 23939 SIG: 3
06-07 13:51:44.444: I/dalvikvm(23939): threadid=4: reacting to signal 3
06-07 13:51:44.444: I/dalvikvm(23939): Wrote stack traces to '/data/anr/traces.txt'
06-07 13:51:44.444: I/Process(1464): Sending signal. PID: 1464 SIG: 3
06-07 13:51:44.444: I/dalvikvm(1464): threadid=4: reacting to signal 3
06-07 13:51:44.484: I/dalvikvm(1464): Wrote stack traces to '/data/anr/traces.txt'
06-07 13:51:44.484: I/Process(1464): Sending signal. PID: 1690 SIG: 3
06-07 13:51:44.484: I/dalvikvm(1690): threadid=4: reacting to signal 3
06-07 13:51:44.484: I/dalvikvm(1690): Wrote stack traces to '/data/anr/traces.txt'
06-07 13:51:44.484: I/Process(1464): Sending signal. PID: 1639 SIG: 3
06-07 13:51:44.484: I/dalvikvm(1639): threadid=4: reacting to signal 3
06-07 13:51:44.494: I/dalvikvm(1639): Wrote stack traces to '/data/anr/traces.txt'
06-07 13:51:44.494: I/Process(1464): Sending signal. PID: 1689 SIG: 3
06-07 13:51:44.494: I/dalvikvm(1689): threadid=4: reacting to signal 3
06-07 13:51:44.494: I/dalvikvm(1689): Wrote stack traces to '/data/anr/traces.txt'
06-07 13:51:44.494: I/Process(1464): Sending signal. PID: 1672 SIG: 3
06-07 13:51:44.494: I/dalvikvm(1672): threadid=4: reacting to signal 3
06-07 13:51:44.494: I/dalvikvm(1672): Wrote stack traces to '/data/anr/traces.txt'
06-07 13:51:44.494: I/Process(1464): Sending signal. PID: 1656 SIG: 3
06-07 13:51:44.494: I/dalvikvm(1656): threadid=4: reacting to signal 3
06-07 13:51:44.504: I/dalvikvm(1656): Wrote stack traces to '/data/anr/traces.txt'
06-07 13:51:44.504: I/Process(1464): Sending signal. PID: 1652 SIG: 3
06-07 13:51:44.504: I/dalvikvm(1652): threadid=4: reacting to signal 3
06-07 13:51:44.514: I/dalvikvm(1652): Wrote stack traces to '/data/anr/traces.txt'
06-07 13:51:44.514: I/Process(1464): Sending signal. PID: 1642 SIG: 3
06-07 13:51:44.514: I/dalvikvm(1642): threadid=4: reacting to signal 3
06-07 13:51:44.514: I/dalvikvm(1642): Wrote stack traces to '/data/anr/traces.txt'
06-07 13:51:44.514: I/Process(1464): Sending signal. PID: 1664 SIG: 3
06-07 13:51:44.514: I/dalvikvm(1664): threadid=4: reacting to signal 3
06-07 13:51:44.514: I/dalvikvm(1664): Wrote stack traces to '/data/anr/traces.txt'
06-07 13:51:44.514: I/Process(1464): Sending signal. PID: 1675 SIG: 3
06-07 13:51:44.514: I/dalvikvm(1675): threadid=4: reacting to signal 3
06-07 13:51:44.514: I/dalvikvm(1675): Wrote stack traces to '/data/anr/traces.txt'
06-07 13:51:44.514: I/Process(1464): Sending signal. PID: 1691 SIG: 3
06-07 13:51:44.514: I/dalvikvm(1691): threadid=4: reacting to signal 3
06-07 13:51:44.514: I/dalvikvm(1691): Wrote stack traces to '/data/anr/traces.txt'
06-07 13:51:44.514: I/Process(1464): Sending signal. PID: 1590 SIG: 3
06-07 13:51:44.514: I/dalvikvm(1590): threadid=4: reacting to signal 3
06-07 13:51:44.524: I/dalvikvm(1590): Wrote stack traces to '/data/anr/traces.txt'
06-07 13:51:44.734: D/dalvikvm(1464): GC_CONCURRENT freed 1754K, 33% free 9128K/13511K, external 6035K/6964K, paused 2ms+6ms
06-07 13:51:44.814: D/dalvikvm(1464): GC_EXPLICIT freed 31K, 33% free 9107K/13511K, external 6035K/6964K, paused 71ms
06-07 13:51:44.914: E/NetlinkEvent(1351): NetlinkEvent::FindParam(): Parameter 'UDEV_LOG' not found
06-07 13:51:45.364: E/ActivityManager(1464): ANR in uda.projectlogging, pid 23939 (uda.projectlogging/.Radio_Group)
06-07 13:51:45.364: E/ActivityManager(1464): Reason: keyDispatchingTimedOut
06-07 13:51:45.364: E/ActivityManager(1464): Load: 0.26 / 0.25 / 0.21
06-07 13:51:45.364: E/ActivityManager(1464): CPU usage from 7340ms to 0ms ago with 99% awake:
06-07 13:51:45.364: E/ActivityManager(1464): 0.9% 783/als_wq: 0% user + 0.9% kernel
06-07 13:51:45.364: E/ActivityManager(1464): 0.8% 1464/system_server: 0.1% user + 0.6% kernel / faults: 1 minor
06-07 13:51:45.364: E/ActivityManager(1464): 0.5% 1489/ActivityManager: 0.1% user + 0.4% kernel
06-07 13:51:45.364: E/ActivityManager(1464): 0.2% 1543/InputDispatcher: 0% user + 0.2% kernel
06-07 13:51:45.364: E/ActivityManager(1464): 0.1% 1539/PowerManagerSer: 0% user + 0.1% kernel
06-07 13:51:45.364: E/ActivityManager(1464): 0% 19639/com.svox.pico: 0% user + 0% kernel / faults: 56 minor
06-07 13:51:45.364: E/ActivityManager(1464): 0% 19639/com.svox.pico: 0% user + 0% kernel
06-07 13:51:45.364: E/ActivityManager(1464): 0.4% 288/tegra_spi.1: 0% user + 0.4% kernel
06-07 13:51:45.364: E/ActivityManager(1464): 0.4% 19564/com.android.vending: 0.2% user + 0.1% kernel
06-07 13:51:45.364: E/ActivityManager(1464): 0.2% 19566/HeapWorker: 0.1% user + 0.1% kernel
06-07 13:51:45.364: E/ActivityManager(1464): 0% 1358/battd: 0% user + 0% kernel
06-07 13:51:45.364: E/ActivityManager(1464): 0.1% 21254/com.motorola.android.datamanager: 0.1% user + 0% kernel
06-07 13:51:45.364: E/ActivityManager(1464): 0.1% 21255/HeapWorker: 0.1% user + 0% kernel
06-07 13:51:45.364: E/ActivityManager(1464): 7.9% TOTAL: 1.3% user + 2% kernel + 0.1% iowait + 4.3% softirq
06-07 13:51:45.364: E/ActivityManager(1464): CPU usage from 420ms to 934ms later with 99% awake:
06-07 13:51:45.364: E/ActivityManager(1464): 7.6% 1464/system_server: 1.9% user + 5.7% kernel / faults: 1 minor
06-07 13:51:45.364: E/ActivityManager(1464): 3.8% 1543/InputDispatcher: 0% user + 3.8% kernel
06-07 13:51:45.364: E/ActivityManager(1464): 3.9% TOTAL: 1.9% user + 1.9% kernel
点击发布按钮时：
postButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
v.startAnimation(AnimationUtils.loadAnimation(
getApplicationContext(), R.anim.image_click));
data = new JSONObject();
if (description.equals("")) {
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(),
"Please Enter a Description",
Toast.LENGTH_LONG).show();
}
});
} else if (delayStart == null) {
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(),
"Please Set Delay Duration",
Toast.LENGTH_LONG).show();
}
});
} else {
try {
data.put("COMMENT", description);
data.put("DELAYSTART",
delayStart.get(Calendar.HOUR_OF_DAY) + ":"
+ delayStart.get(Calendar.MINUTE));
data.put("DELAYEND", delayEnd.get(Calendar.HOUR_OF_DAY)
+ ":" + delayEnd.get(Calendar.MINUTE));
postEntry();
description = "";
delayHours = 0;
delayMinutes = 0;
delayStart = null;
delayEnd = null;
delay.setText("");
} catch (JSONException e) {
e.printStackTrace();
}
}
}
});
发布条目：
public void postEntry() {
final ProgressDialog dialog1 = new ProgressDialog(this);
dialog1.setCancelable(true);
dialog1.setMessage("Loading...");
dialog1.show();
final Thread background1 = new Thread(new Runnable() {
public void run() {
Looper.prepare();
try {
String type1 = "0";
switch (current) {
case 0:
type1 = "1";
break;
case 1:
type1 = "4";
break;
case 2:
type1 = "3";
break;
case 3:
type1 = "6";
break;
case 4:
type1 = "5";
break;
}
if (helperMethods.isOnline(currentActivity)) {
if (failedUploads)
doFailedUploads();
SoapObject request = new SoapObject(
"http://www.constructiononline.com/service/",
"OSLPost");
PropertyInfo num1 = new PropertyInfo();
num1.setName("userEmail");
num1.setValue(settings.getString("EMAIL", ""));
request.addProperty(num1);
num1 = new PropertyInfo();
num1.setName("prj_id");
num1.setValue(projectInfo.getID());
request.addProperty(num1);
num1 = new PropertyInfo();
num1.setName("entryDate");
num1.setValue(month + "/" + day + "/" + year);
request.addProperty(num1);
num1 = new PropertyInfo();
num1.setName("type");
num1.setValue(type1);
request.addProperty(num1);
num1 = new PropertyInfo();
num1.setName("data");
num1.setValue(data.toString());
request.addProperty(num1);
num1 = new PropertyInfo();
num1.setName("delete");
num1.setValue("false");
request.addProperty(num1);
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(
SoapEnvelope.VER11);
envelope.dotNet = true;
envelope.setOutputSoapObject(request);
HttpTransportSE androidHttpTransport = new HttpTransportSE(
URL);
androidHttpTransport
.call("http://www.constructiononline.com/service/OSLPost",
envelope);
Log.e("Response from Post", envelope.getResponse()
.toString());
updatePostList(false);
} else {
addFailedUploads(settings.getString("EMAIL", ""),
projectInfo.getID(), month + "/" + day + "/"
+ year, type1, data.toString());
JSONObject j = new JSONObject();
j.put("LOG_OBJECT", data);
j.put("TYPE", type1);
j.put("DATE", month + "/" + day + "/" + year);
Calendar c = Calendar.getInstance();
String created = c.get(Calendar.MONTH) + "/"
+ c.get(Calendar.DAY_OF_MONTH) + "/"
+ c.get(Calendar.YEAR) + " "
+ c.get(Calendar.HOUR) + ":"
+ c.get(Calendar.MINUTE) + ":"
+ c.get(Calendar.SECOND) + " "
+ (c.get(Calendar.AM_PM) == 0 ? "AM" : "PM");
j.put("CREATED", created);
JSONObject creatorTemp = new JSONObject();
creatorTemp.put("ID", "0");
creatorTemp.put("NAME", " ");
creatorTemp.put("COMPANY", " ");
creatorTemp.put("ICON", "NULL");
j.put("CREATOR", creatorTemp);
j.put("ID", "0");
switch (current) {
case 0:
weatherEntries.put(j);
break;
case 1:
workEntries.put(j);
break;
case 2:
visitorEntries.put(j);
break;
case 3:
deliveryEntries.put(j);
break;
case 4:
noteEntries.put(j);
break;
}
}
if (dialog1 != null && dialog1.isShowing()) {
dialog1.dismiss();
}
} catch (final Exception e) {
e.printStackTrace();
StringWriter sw = new StringWriter();
e.printStackTrace(new PrintWriter(sw));
String stacktrace = sw.toString();
addOnlineErrorLogEntry(e.getMessage(), stacktrace);
if (dialog1 != null && dialog1.isShowing()) {
dialog1.dismiss();
}
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(),
e.getMessage() + " in setupProjects",
Toast.LENGTH_LONG).show();
}
});
}
}
});
// start the background thread
background1.start();
}
更新帖子列表：
private void updatePostList(final boolean getAll) {
if (!helperMethods.isOnline(currentActivity)) {
return;
}
final ProgressDialog dialog1 = new ProgressDialog(this);
dialog1.setCancelable(true);
dialog1.setMessage("Loading...");
dialog1.show();
final Thread background1 = new Thread(new Runnable() {
public void run() {
Looper.prepare();
try {
if (failedUploads)
doFailedUploads();
SoapObject request = new SoapObject(
"http://www.constructiononline.com/service/",
"OSLGet");
PropertyInfo num1 = new PropertyInfo();
num1.setName("userEmail");
num1.setValue(settings.getString("EMAIL", ""));
request.addProperty(num1);
num1 = new PropertyInfo();
num1.setName("prj_id");
num1.setValue(projectInfo.getID());
request.addProperty(num1);
num1 = new PropertyInfo();
num1.setName("startDate");
num1.setValue("");
if (!getAll) {
num1.setValue(month + "/" + day + "/" + year);
}
request.addProperty(num1);
num1 = new PropertyInfo();
num1.setName("endDate");
num1.setValue("");
request.addProperty(num1);
num1 = new PropertyInfo();
num1.setName("type");
num1.setValue("");
if (!getAll) {
switch (current) {
case 0:
num1.setValue("1");
break;
case 1:
num1.setValue("4");
break;
case 2:
num1.setValue("3");
break;
case 3:
num1.setValue("6");
break;
case 4:
num1.setValue("5");
break;
}
}
request.addProperty(num1);
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(
SoapEnvelope.VER11);
envelope.dotNet = true;
envelope.setOutputSoapObject(request);
HttpTransportSE androidHttpTransport = new HttpTransportSE(
URL);
androidHttpTransport.call(
"http://www.constructiononline.com/service/OSLGet",
envelope);
Log.e("response", envelope.getResponse().toString());
JSONObject temp = new JSONObject(envelope.getResponse()
.toString());
JSONArray entries = temp.getJSONArray("ENTRIES");
if (getAll) {
weatherEntries = new JSONArray();
workEntries = new JSONArray();
visitorEntries = new JSONArray();
deliveryEntries = new JSONArray();
noteEntries = new JSONArray();
}
switch (current) {
case 0:
weatherEntries = new JSONArray();
break;
case 1:
workEntries = new JSONArray();
break;
case 2:
visitorEntries = new JSONArray();
break;
case 3:
deliveryEntries = new JSONArray();
break;
case 4:
noteEntries = new JSONArray();
break;
}
for (int x = 0; x < entries.length(); x++) {
switch (entries.getJSONObject(x).getInt("TYPE")) {
case 1:
weatherEntries.put(entries.getJSONObject(x));
break;
case 3:
visitorEntries.put(entries.getJSONObject(x));
break;
case 4:
workEntries.put(entries.getJSONObject(x));
break;
case 5:
noteEntries.put(entries.getJSONObject(x));
break;
case 6:
deliveryEntries.put(entries.getJSONObject(x));
break;
}
}
runOnUiThread(new Runnable() {
@Override
public void run() {
if (getAll) {
setupWeatherLog();
} else {
getPosts();
}
}
});
if (dialog1 != null && dialog1.isShowing()) {
dialog1.dismiss();
}
} catch (final Exception e) {
e.printStackTrace();
StringWriter sw = new StringWriter();
e.printStackTrace(new PrintWriter(sw));
String stacktrace = sw.toString();
addOnlineErrorLogEntry(e.getMessage(), stacktrace);
if (dialog1 != null && dialog1.isShowing()) {
dialog1.dismiss();
}
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(),
e.getMessage() + " in setupProjects",
Toast.LENGTH_LONG).show();
}
});
}
if (dialog1 != null && dialog1.isShowing()) {
dialog1.dismiss();
}
}
});
// start the background thread
background1.start();
}
填充列表视图：
private void getPosts() {
JSONArray entriesToShow = new JSONArray();
JSONArray postsToLoad = null;
switch (current) {
case 0:
postsToLoad = weatherEntries;
break;
case 1:
postsToLoad = workEntries;
break;
case 2:
postsToLoad = visitorEntries;
break;
case 3:
postsToLoad = deliveryEntries;
break;
case 4:
postsToLoad = noteEntries;
break;
}
for (int i = 0; i < postsToLoad.length(); i++) {
try {
JSONObject temp = postsToLoad.getJSONObject(i);
String[] tempDay = temp.getString("DATE").split("/");
if (Integer.parseInt(tempDay[0]) == month
&& Integer.parseInt(tempDay[1]) == day
&& Integer.parseInt(tempDay[2]) == year) {
entriesToShow.put(temp);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
BaseAdapter listViewAdapter;
switch (current) {
case 0:
listViewAdapter = new WeatherDeliveryVisitLazyAdapter(
currentActivity, entriesToShow, current);
break;
case 1:
listViewAdapter = new WorkLogPostLazyAdapter(currentActivity,
entriesToShow);
break;
case 2:
listViewAdapter = new WeatherDeliveryVisitLazyAdapter(
currentActivity, entriesToShow, current);
break;
case 3:
listViewAdapter = new WeatherDeliveryVisitLazyAdapter(
currentActivity, entriesToShow, current);
break;
case 4:
listViewAdapter = new ProjectNotePostLazyAdapter(currentActivity,
entriesToShow);
break;
default:
listViewAdapter = new ProjectNotePostLazyAdapter(currentActivity,
entriesToShow);
}
if (listViewAdapter == null || listViewAdapter.getCount() == 0) {
runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(getApplicationContext(),
"No Posts to Display", Toast.LENGTH_SHORT).show();
}
});
}
ListView listToFill = (ListView) findViewById(R.id.anyPosts);
listToFill.setAdapter(listViewAdapter);
}
这就是在任何日志中单击post按钮时所做的一切。如果我正确地解释了这一点，当所有进度对话框都清除了屏幕时，后台线程已经结束，并且只有在出现错误或信息不完整的情况下，在ui线程上运行的唯一事情就是设置listview，确实完成了。当我拉开抽屉时，它会显示正确的帖子列表。
编辑我发现如果我在updatePostList方法中注释掉进度对话框，它就可以了。所以新的问题：为什么世界上有解决方案？
最终编辑我明白了。该进度对话框是从后台线程启动的。修改了postEntry方法，使其在UI线程上调用updatePostList，以便在UI线程上创建进度对话框，并且它可以工作。耶。
答案 0 :(得分：1)
从您的描述中，您可能会从主线程开始一些长时间运行的过程。执行诸如写入文件，更新数据库或在主线程上执行网络I / O之类的操作将导致其无响应。在执行此类操作时，您应该使用Service或AsyncTask。
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