活动已泄漏Windows com.android.internal.policy.impl.PhoneWindow$DecorView@46368a28原来是加在这里的
这个问题让我发疯。我错过了一些基本但非常重要的知识,比如如何在活动中创建的新线程中处理长操作,以及如何在长操作完成后修改视图组件(如文本等) 首先让我向您展示我的代码中出现此问题的部分:活动已泄漏Windows com.android.internal.policy.impl.PhoneWindow$DecorView@46368a28原来是加在这里的,android,multithreading,window,memory-leaks,Android,Multithreading,Window,Memory Leaks,这个问题让我发疯。我错过了一些基本但非常重要的知识,比如如何在活动中创建的新线程中处理长操作,以及如何在长操作完成后修改视图组件(如文本等) 首先让我向您展示我的代码中出现此问题的部分: mProgressDialog = ProgressDialog.show(mContext, "Tripplanner", "please wait...", true, false); connectAndGetRoute(); private void connectAndGetRoute(){
mProgressDialog = ProgressDialog.show(mContext, "Tripplanner", "please wait...", true, false);
connectAndGetRoute();
private void connectAndGetRoute(){
new Thread(){
@Override
public void run() {
try {
if(!connectTo9292ov()) return;// conncetto9292ov() connects to a website, parses the reasult into an arraylist. The arraylist contains route.
} catch(UnknownHostException e){
Toast.makeText(mContext, "failed to connect to server", Toast.LENGTH_LONG).show();
}catch (ClientProtocolException e) {
Toast.makeText(mContext, "failed to connect to server", Toast.LENGTH_LONG).show();
} catch (IOException e) {
Toast.makeText(mContext, "failed to connect to server", Toast.LENGTH_LONG).show();
}
handler.post(runConnection);
}
}.start();
handler = new Handler();
runConnection = new Runnable(){
@Override
public void run() {
mProgressDialog.dismiss();
showOnScreen();
}
};
}
这就是我得到的错误:
ERROR/WindowManager(8297): Activity mp.tripplanner.OvPlanner has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@46368a28 that was originally added here
ERROR/WindowManager(8297): android.view.WindowLeaked: Activity mp.tripplanner.OvPlanner has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@46368a28 that was originally added here
ERROR/WindowManager(8297): at android.view.ViewRoot.<init>(ViewRoot.java:251)
ERROR/WindowManager(8297): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:148)
ERROR/WindowManager(8297): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
ERROR/WindowManager(8297): at android.view.Window$LocalWindowManager.addView(Window.java:424)
ERROR/WindowManager(8297): at android.app.Dialog.show(Dialog.java:241)
ERROR/WindowManager(8297): at android.app.ProgressDialog.show(ProgressDialog.java:107)
ERROR/WindowManager(8297): at android.app.ProgressDialog.show(ProgressDialog.java:95)
ERROR/WindowManager(8297): at mp.tripplanner.OvPlanner$3.onClick(OvPlanner.java:351)
ERROR/WindowManager(8297): at android.view.View.performClick(View.java:2408)
ERROR/WindowManager(8297): at android.view.View$PerformClick.run(View.java:8817)
ERROR/WindowManager(8297): at android.os.Handler.handleCallback(Handler.java:587)
ERROR/WindowManager(8297): at android.os.Handler.dispatchMessage(Handler.java:92)
ERROR/WindowManager(8297): at android.os.Looper.loop(Looper.java:144)
ERROR/WindowManager(8297): at android.app.ActivityThread.main(ActivityThread.java:4937)
ERROR/WindowManager(8297): at java.lang.reflect.Method.invokeNative(Native Method)
ERROR/WindowManager(8297): at java.lang.reflect.Method.invoke(Method.java:521)
ERROR/WindowManager(8297): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
ERROR/WindowManager(8297): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
ERROR/WindowManager(8297): at dalvik.system.NativeStart.main(Native Method)
错误/WindowManager(8297):活动mp.tripplanner.OvPlanner泄漏了window com.android.internal.policy.impl.PhoneWindow$DecorView@46368a28原来是加在这里的
错误/WindowManager(8297):android.view.WindowLeaked:Activity mp.tripplanner.OvPlanner已泄漏window com.android.internal.policy.impl.PhoneWindow$DecorView@46368a28原来是加在这里的
错误/WindowManager(8297):位于android.view.ViewRoot。(ViewRoot.java:251)
错误/WindowManager(8297):位于android.view.WindowManagerImpl.addView(WindowManagerImpl.java:148)
错误/WindowManager(8297):位于android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
错误/WindowManager(8297):位于android.view.Window$LocalWindowManager.addView(Window.java:424)
错误/WindowManager(8297):位于android.app.Dialog.show(Dialog.java:241)
错误/WindowManager(8297):位于android.app.ProgressDialog.show(ProgressDialog.java:107)
错误/WindowManager(8297):位于android.app.ProgressDialog.show(ProgressDialog.java:95)
错误/WindowManager(8297):位于mp.tripplanner.OvPlanner$3.onClick(OvPlanner.java:351)
错误/WindowManager(8297):位于android.view.view.performClick(view.java:2408)
错误/WindowManager(8297):位于android.view.view$PerformClick.run(view.java:8817)
错误/WindowManager(8297):位于android.os.Handler.handleCallback(Handler.java:587)
错误/WindowManager(8297):位于android.os.Handler.dispatchMessage(Handler.java:92)
错误/WindowManager(8297):位于android.os.Looper.loop(Looper.java:144)
错误/WindowManager(8297):位于android.app.ActivityThread.main(ActivityThread.java:4937)
错误/WindowManager(8297):位于java.lang.reflect.Method.Invokenactive(本机方法)
错误/WindowManager(8297):位于java.lang.reflect.Method.invoke(Method.java:521)
错误/WindowManager(8297):位于com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
错误/WindowManager(8297):位于com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
错误/WindowManager(8297):位于dalvik.system.NativeStart.main(本机方法)
但在上述错误消息之前,另一个错误消息会写入日志,即:
ERROR/AndroidRuntime(8297): FATAL EXCEPTION: Thread-9
ERROR/AndroidRuntime(8297): java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
ERROR/AndroidRuntime(8297): at android.os.Handler.<init>(Handler.java:121)
ERROR/AndroidRuntime(8297): at android.widget.Toast.<init>(Toast.java:68)
ERROR/AndroidRuntime(8297): at android.widget.Toast.makeText(Toast.java:231)
ERROR/AndroidRuntime(8297): at mp.tripplanner.OvPlanner$4.run(OvPlanner.java:371)
错误/AndroidRuntime(8297):致命异常:线程9
错误/AndroidRuntime(8297):java.lang.RuntimeException:无法在未调用Looper.prepare()的线程内创建处理程序
ERROR/AndroidRuntime(8297):位于android.os.Handler.(Handler.java:121)
ERROR/AndroidRuntime(8297):位于android.widget.Toast。(Toast.java:68)
ERROR/AndroidRuntime(8297):位于android.widget.Toast.makeText(Toast.java:231)
错误/AndroidRuntime(8297):位于mp.tripplanner.OvPlanner$4.run(OvPlanner.java:371)
谢谢你的帮助。只是一个简单的想法
我想,这是你的祝酒词。试着把它们注释掉
如果仍要显示消息,请保存线程的状态并在处理程序中处理它。从finally块调用处理程序
mProgressDialog = ProgressDialog.show(mContext, "Tripplanner", "please wait...", true, false);
connectAndGetRoute();
private void connectAndGetRoute(){
new Thread(){
@Override
public void run() {
try {
if(!connectTo9292ov()) return;// conncetto9292ov() connects to a website, parses the reasult into an arraylist. The arraylist contains route.
} catch(UnknownHostException e){
// an int member of your activity
threadStatus = 404;
// Toast.makeText(mContext, "failed to connect to server", Toast.LENGTH_LONG).show();
}catch (ClientProtocolException e) {
threadStatus = 404;
// Toast.makeText(mContext, "failed to connect to server", Toast.LENGTH_LONG).show();
} catch (IOException e) {
threadStatus = 404;
// Toast.makeText(mContext, "failed to connect to server", Toast.LENGTH_LONG).show();
}
finally {
handler.post(runConnection);}
}
}.start();
handler = new Handler();
runConnection = new Runnable(){
@Override
public void run() {
if (threadStatus == 404) { Toast.makeText(mContext, "failed to connect to server", Toast.LENGTH_LONG).show();}
else {
mProgressDialog.dismiss();
showOnScreen();}
}
};
}
示例代码:
new Thread(new Runnable() {
@Override
public void run() {
doNotUIthings();
updateUI.sendEmptyMessage(0); //Update ui in UI thread
}
private Handler updateUI = new Handler(){
@Override
public void dispatchMessage(Message msg) {
super.dispatchMessage(msg);
updateUI();
}
};
}).start();
但是我建议使用Java线程来代替Java线程。您的
处理程序需要在UI线程中创建,以便它能够更新UI。
然后,我将使用处理程序的sendMessage
方法,而不是发布runnable:
private static final int HANDLER_MESSAGE_ERROR = 0;
private static final int HANDLER_MESSAGE_COMPLETED = 1;
...
private void connectAndGetRoute(){
new Thread(){
@Override
public void run() {
try {
if(!connectTo9292ov()) return;
} catch(UnknownHostException e){
sendMessage(HANDLER_MESSAGE_ERROR);
} catch (ClientProtocolException e) {
sendMessage(HANDLER_MESSAGE_ERROR);
} catch (IOException e) {
sendMessage(HANDLER_MESSAGE_ERROR);
} finally {
sendMessage(HANDLER_MESSAGE_COMPLETED);
}
}
private void sendMessage(int what){
Message msg = Message.obtain();
msg.what = what;
mHandler.sendMessage(msg);
}
}.start();
}
...
private Handler mHandler = new Handler(){
@Override
public void handleMessage(Message msg) {
switch(msg.what){
case HANDLER_MESSAGE_ERROR:
Toast.makeText(mContext, "failed to connect to server", Toast.LENGTH_LONG).show();
break;
case HANDLER_MESSAGE_COMPLETED:
mProgressDialog.dismiss();
showOnScreen();
break;
default:
Log.w("MyTag","Warning: message type \""+msg.what+"\" not supported");
}
}
}
你猜对了,也猜对了,但不确定,还是不知道怎么解决。因为我不理解你提供的解决方案:D.你能告诉我保存线程状态的意思吗?我该怎么做?实际上我需要更多关于你的解决方案的解释:D.对不起,我对你的代码做了一些修改。若你们问我原因,那个么你们是不允许从线程更新你们的ui的。你应该到外面去做。再看看@Olsavage的回答。这就解决了问题。我只是想知道你建议使用处理程序的sendMessage而不是发布runnable吗?@mnish好吧,这两种方法都应该有效,我只是发现如果用户界面更新都在一个地方,那么更容易跟踪它们。使用sendMessage
更容易看到职责分离,因此我发现调试更容易。非常感谢。其实从来没有想到过。虽然我不知道它是如何工作的,但是如果将来的问题再次发生,我将肯定地考虑使用它。但现在我将继续使用Dave.c提供的解决方案,因为它对我来说很好。