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。但是，似乎我遇到了一个问题，似乎找不到答案。用户发帖后，后退按钮不会关闭日志活动。相反，它使应用程序无响应；这种实例的 logcat 位于底部。但是，单击“等待”而不是“强制关闭”会恢复应用程序，但后退按钮仍然不起作用。下面是活动的布局。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编辑文本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。那时，后退按钮具有完整的功能。但是，滚动视图中的列表视图效果不佳，因此必须将其更改为带有列表视图的滑动抽屉，每次用户在日志之间翻转时，其适配器都会更改。这是后退按钮功能丢失的地方。起初我以为我的 onKeyDown 方法做错了，但是在尝试调试它、修改它甚至删除它之后，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，所以我的结论是它与滑动抽屉有关。对此的任何帮助将不胜感激。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，所以我的结论是它与滑动抽屉有关。对此的任何帮助将不胜感激。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，所以我的结论是它与滑动抽屉有关。对此的任何帮助将不胜感激。
编辑：在彻底探索这个问题之后，我发现不仅仅是后退按钮可以做到这一点。设置按钮和搜索按钮也都表现出这种行为。唯一显示正确功能的按钮是主页按钮。但是，活动中的功能不受影响。我仍然可以发帖、在视图之间切换以及查看和编辑帖子。
<?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的范围，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();
处理列表视图的代码范围：
ListView listToFill = (ListView) findViewById(R.id.anyPosts);
listToFill.setAdapter(listViewAdapter);
日志猫：
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
单击发布按钮时：
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发布按钮时所做的一切。如果我正确地解释了这一点，当所有进度对话框都清除屏幕时，后台线程已经结束，并且在 ui 线程上运行的唯一事情，除了在发生错误或信息不完整的情况下的祝酒词之外，就是设置listview，它确实完成了。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，它工作得很好。这么新的问题：为什么这就是解决方案？
最终编辑我想通了。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。