我正在玩android，我正在创建一个简单的Twitter应用来测试我到目前为止学到的东西。但我遇到了一个我不明白的问题。我创建了一个线程来获取推文，没有问题，但随后添加了一个ProgressDialog来显示该线程何时运行。这样做会导致非常不寻常的行为。如果用户从垂直方向旋转到水平方向，程序按预期运行，没有问题，但如果他然后旋转，程序崩溃说窗口泄漏。
问题只发生在水平到垂直布局开关上。我知道如果你在对话框运行时尝试旋转的问题，但我确保对话框已经完成运行并在旋转之前解除，它仍然会崩溃。继承我的代码：
package com.onesmartpuppy.puppytweet;
import java.util.ArrayList;
import com.github.droidfu.widgets.WebImageView;
import winterwell.jtwitter.Twitter;
import winterwell.jtwitter.Twitter.Status;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.TextView;
public class PuppyTweet extends ListActivity implements OnClickListener {
private ProgressDialog m_ProgressDialog = null;
private ArrayList<Status> messages = null;
private TweetAdapter m_adapter;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
messages = new ArrayList<Status>();
this.m_adapter = new TweetAdapter(this, R.layout.row, messages);
setListAdapter(this.m_adapter);
setupButtons();
m_ProgressDialog = ProgressDialog.show(this,
"Please wait...", "Retrieving tweets ...", true);
Runnable findTweets = new Runnable(){
@Override
public void run() {
try {
messages = new ArrayList<Status>();
Twitter ourTwitter = new Twitter("*****", "******");
messages = (ArrayList<Status>) ourTwitter.getFriendsTimeline();
Thread.sleep(1000);
Log.i("ARRAY", ""+ messages.size());
} catch (Exception e) {
Log.e("BACKGROUND_PROC", e.getMessage());
}
handler.sendEmptyMessage(0);
}
};
Thread thread = new Thread(null, findTweets, "FindTweets");
thread.start();
}
private void setupButtons()
{
Button refreshButton = (Button) findViewById(R.id.refresh_button);
refreshButton.setOnClickListener(this);
Button settingsButton = (Button) findViewById(R.id.settings_button);
settingsButton.setOnClickListener(this);
Button tweetButton = (Button) findViewById(R.id.update_button);
tweetButton.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId())
{
case R.id.settings_button:
break;
case R.id.update_button:
break;
case R.id.refresh_button:
break;
default:
break;
}
}
private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
if(messages != null && messages.size() > 0){
m_adapter.clear();
m_adapter.notifyDataSetChanged();
for(int i=0;i<messages.size();i++)
m_adapter.add(messages.get(i));
}
m_ProgressDialog.dismiss();
m_adapter.notifyDataSetChanged();
}
};
private class TweetAdapter extends ArrayAdapter<Status> {
private ArrayList<Status> items;
public TweetAdapter(Context context, int textViewResourceId, ArrayList<Status> items) {
super(context, textViewResourceId, items);
this.items = items;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null) {
LayoutInflater vi = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = vi.inflate(R.layout.row2, null);
}
Status o = (Status) items.get(position);
if (o != null) {
WebImageView img = (WebImageView) v.findViewById(R.id.webimage);
TextView tt = (TextView) v.findViewById(R.id.toptext);
TextView bt = (TextView) v.findViewById(R.id.bottomtext);
if (tt != null) {
tt.setText("Name: " + o.user.name); }
if(bt != null){
bt.setText("Status: " + o.getText());
}
if (img !=null) {
img.setImageUrl(o.getUser().profileImageUrl.toString());
img.loadImage();
}
}
return v;
}
}
}
继承崩溃的LogCat：
02-10 16:01:05.237: INFO/ActivityManager(63): Config changed: { scale=1.0 imsi=310/260 loc=ld_US touch=3 keys=2/1/2 nav=3/1 orien=2 layout=18}
02-10 16:01:05.344: WARN/UsageStats(63): Something wrong here, didn't expect com.onesmartpuppy.puppytweet to be resumed
02-10 16:01:05.384: INFO/WindowManager(63): Setting rotation to 0, animFlags=0
02-10 16:01:05.394: INFO/ActivityManager(63): Config changed: { scale=1.0 imsi=310/260 loc=ld_US touch=3 keys=2/1/2 nav=3/1 orien=1 layout=18}
02-10 16:01:05.504: WARN/UsageStats(63): Something wrong here, didn't expect com.onesmartpuppy.puppytweet to be resumed
02-10 16:01:05.704: ERROR/WindowManager(227): Activity com.onesmartpuppy.puppytweet.PuppyTweet has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@43af9490 that was originally added here
02-10 16:01:05.704: ERROR/WindowManager(227): android.view.WindowLeaked: Activity com.onesmartpuppy.puppytweet.PuppyTweet has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@43af9490 that was originally added here
02-10 16:01:05.704: ERROR/WindowManager(227): at android.view.ViewRoot.<init>(ViewRoot.java:227)
02-10 16:01:05.704: ERROR/WindowManager(227): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:148)
02-10 16:01:05.704: ERROR/WindowManager(227): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
02-10 16:01:05.704: ERROR/WindowManager(227): at android.view.Window$LocalWindowManager.addView(Window.java:424)
02-10 16:01:05.704: ERROR/WindowManager(227): at android.app.Dialog.show(Dialog.java:239)
02-10 16:01:05.704: ERROR/WindowManager(227): at android.app.ProgressDialog.show(ProgressDialog.java:107)
02-10 16:01:05.704: ERROR/WindowManager(227): at android.app.ProgressDialog.show(ProgressDialog.java:90)
02-10 16:01:05.704: ERROR/WindowManager(227): at com.onesmartpuppy.puppytweet.PuppyTweet.onCreate(PuppyTweet.java:39)
02-10 16:01:05.704: ERROR/WindowManager(227): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
02-10 16:01:05.704: ERROR/WindowManager(227): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2417)
02-10 16:01:05.704: ERROR/WindowManager(227): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2470)
02-10 16:01:05.704: ERROR/WindowManager(227): at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:3573)
02-10 16:01:05.704: ERROR/WindowManager(227): at android.app.ActivityThread.access$2300(ActivityThread.java:119)
02-10 16:01:05.704: ERROR/WindowManager(227): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1825)
02-10 16:01:05.704: ERROR/WindowManager(227): at android.os.Handler.dispatchMessage(Handler.java:99)
02-10 16:01:05.704: ERROR/WindowManager(227): at android.os.Looper.loop(Looper.java:123)
02-10 16:01:05.704: ERROR/WindowManager(227): at android.app.ActivityThread.main(ActivityThread.java:4310)
02-10 16:01:05.704: ERROR/WindowManager(227): at java.lang.reflect.Method.invokeNative(Native Method)
02-10 16:01:05.704: ERROR/WindowManager(227): at java.lang.reflect.Method.invoke(Method.java:521)
02-10 16:01:05.704: ERROR/WindowManager(227): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
02-10 16:01:05.704: ERROR/WindowManager(227): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
02-10 16:01:05.704: ERROR/WindowManager(227): at dalvik.system.NativeStart.main(Native Method)
02-10 16:01:06.344: INFO/global(227): Default buffer size used in BufferedReader constructor. It would be better to be explicit if an 8k-char buffer is required.
02-10 16:01:06.624: DEBUG/dalvikvm(227): GC freed 6082 objects / 479568 bytes in 77ms
02-10 16:01:07.374: DEBUG/dalvikvm(227): GC freed 11982 objects / 709808 bytes in 83ms
02-10 16:01:07.394: INFO/global(227): Default buffer size used in BufferedReader constructor. It would be better to be explicit if an 8k-char buffer is required.
02-10 16:01:07.564: DEBUG/dalvikvm(227): GC freed 95 objects / 79880 bytes in 68ms
02-10 16:01:07.704: DEBUG/dalvikvm(227): GC freed 8 objects / 38992 bytes in 65ms
02-10 16:01:08.174: DEBUG/dalvikvm(63): GC freed 5407 objects / 257208 bytes in 174ms
02-10 16:01:08.194: INFO/ARRAY(227): 20
02-10 16:01:08.204: DEBUG/AndroidRuntime(227): Shutting down VM
02-10 16:01:08.204: WARN/dalvikvm(227): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
02-10 16:01:08.204: ERROR/AndroidRuntime(227): Uncaught handler: thread main exiting due to uncaught exception
02-10 16:01:08.214: ERROR/AndroidRuntime(227): java.lang.IllegalArgumentException: View not attached to window manager
02-10 16:01:08.214: ERROR/AndroidRuntime(227): at android.view.WindowManagerImpl.findViewLocked(WindowManagerImpl.java:355)
02-10 16:01:08.214: ERROR/AndroidRuntime(227): at android.view.WindowManagerImpl.removeView(WindowManagerImpl.java:200)
02-10 16:01:08.214: ERROR/AndroidRuntime(227): at android.view.Window$LocalWindowManager.removeView(Window.java:432)
02-10 16:01:08.214: ERROR/AndroidRuntime(227): at android.app.Dialog.dismissDialog(Dialog.java:280)
02-10 16:01:08.214: ERROR/AndroidRuntime(227): at android.app.Dialog.access$000(Dialog.java:73)
02-10 16:01:08.214: ERROR/AndroidRuntime(227): at android.app.Dialog$1.run(Dialog.java:109)
02-10 16:01:08.214: ERROR/AndroidRuntime(227): at android.app.Dialog.dismiss(Dialog.java:264)
02-10 16:01:08.214: ERROR/AndroidRuntime(227): at com.onesmartpuppy.puppytweet.PuppyTweet$1.handleMessage(PuppyTweet.java:104)
02-10 16:01:08.214: ERROR/AndroidRuntime(227): at android.os.Handler.dispatchMessage(Handler.java:99)
02-10 16:01:08.214: ERROR/AndroidRuntime(227): at android.os.Looper.loop(Looper.java:123)
02-10 16:01:08.214: ERROR/AndroidRuntime(227): at android.app.ActivityThread.main(ActivityThread.java:4310)
02-10 16:01:08.214: ERROR/AndroidRuntime(227): at java.lang.reflect.Method.invokeNative(Native Method)
02-10 16:01:08.214: ERROR/AndroidRuntime(227): at java.lang.reflect.Method.invoke(Method.java:521)
02-10 16:01:08.214: ERROR/AndroidRuntime(227): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
02-10 16:01:08.214: ERROR/AndroidRuntime(227): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
02-10 16:01:08.214: ERROR/AndroidRuntime(227): at dalvik.system.NativeStart.main(Native Method)
02-10 16:01:08.244: INFO/Process(63): Sending signal. PID: 227 SIG: 3
02-10 16:01:08.244: INFO/dalvikvm(227): threadid=7: reacting to signal 3
02-10 16:01:08.274: ERROR/dalvikvm(227): Unable to open stack trace file '/data/anr/traces.txt': Permission denied
02-10 16:01:08.754: DEBUG/dalvikvm(227): GC freed 5986 objects / 372656 bytes in 316ms
02-10 16:01:09.829: INFO/ARRAY(227): 20
02-10 16:01:09.955: INFO/Process(227): Sending signal. PID: 227 SIG: 9
02-10 16:01:09.974: INFO/ActivityManager(63): Process com.onesmartpuppy.puppytweet (pid 227) has died.
02-10 16:01:10.014: INFO/WindowManager(63): WIN DEATH: Window{43b653e0 com.onesmartpuppy.puppytweet/com.onesmartpuppy.puppytweet.PuppyTweet paused=false}
02-10 16:01:10.014: INFO/WindowManager(63): WIN DEATH: Window{43c32b48 Please wait... paused=false}
02-10 16:01:10.164: WARN/UsageStats(63): Unexpected resume of com.android.launcher while already resumed in com.onesmartpuppy.puppytweet
02-10 16:01:10.314: WARN/InputManagerService(63): Got RemoteException sending setActive(false) notification to pid 227 uid 10023
答案 0 :(得分：9)
日志中的WindowLeaked异常通常发生在某种异步任务在完成它的活动被销毁之后完成时。
旋转屏幕时，将重新创建活动。根据{{3}}，您应该在onPause方法中保存任何实例状态，包括确保停止任何异步任务。您可以使用保存的包在onCreate方法中重新创建。