终结器抛出的未捕获异常（将被丢弃），Android答案

【问题标题】：Uncaught exception thrown by finalizer (will be discarded) , Android终结器抛出的未捕获异常（将被丢弃），Android
【发布时间】：2011-02-07 17:09:25
【问题描述】：

在 logcat 中我发现了这些消息，我的应用程序运行正常（没有错误/没有异常/并且结果正确），但是为什么这些消息出现在 log cat 中。我关闭了所有游标。还有一件事，应用程序显示活动有点慢（我的 logcat 消息中列出了哪些活动），我认为生成这些日志消息需要花费时间。有什么解决办法。

I/ActivityManager(   63): Starting activity: Intent { cmp=com.pankaj.myapp/.SelectedContactActivity (has extras) }
    D/dalvikvm(  251): GC freed 2584 objects / 174064 bytes in 139ms
    I/dalvikvm(  251): Uncaught exception thrown by finalizer (will be discarded):
    I/dalvikvm(  251): Ljava/lang/IllegalStateException;: Finalizing cursor android.database.sqlite.SQLiteCursor@43d2c688 on contacts_tags that has not been deactivated or closed
    I/dalvikvm(  251):  at android.database.sqlite.SQLiteCursor.finalize(SQLiteCursor.java:596)
    I/dalvikvm(  251):  at dalvik.system.NativeStart.run(Native Method)
    I/dalvikvm(  251): Uncaught exception thrown by finalizer (will be discarded):
    I/dalvikvm(  251): Ljava/lang/IllegalStateException;: Finalizing cursor android.database.sqlite.SQLiteCursor@43d2bf58 on contacts_tags that has not been deactivated or closed
    I/dalvikvm(  251):  at android.database.sqlite.SQLiteCursor.finalize(SQLiteCursor.java:596)
    I/dalvikvm(  251):  at dalvik.system.NativeStart.run(Native Method)
    I/dalvikvm(  251): Uncaught exception thrown by finalizer (will be discarded):
    I/dalvikvm(  251): Ljava/lang/IllegalStateException;: Finalizing cursor android.database.sqlite.SQLiteCursor@43d2b5a8 on contacts_tags that has not been deactivated or closed
    I/dalvikvm(  251):  at android.database.sqlite.SQLiteCursor.finalize(SQLiteCursor.java:596)
    I/dalvikvm(  251):  at dalvik.system.NativeStart.run(Native Method)
    I/dalvikvm(  251): Uncaught exception thrown by finalizer (will be discarded):
    I/dalvikvm(  251): Ljava/lang/IllegalStateException;: Finalizing cursor android.database.sqlite.SQLiteCursor@43d29af0 on contacts_tags that has not been deactivated or closed
    I/dalvikvm(  251):  at android.database.sqlite.SQLiteCursor.finalize(SQLiteCursor.java:596)
    I/dalvikvm(  251):  at dalvik.system.NativeStart.run(Native Method)
    I/dalvikvm(  251): Uncaught exception thrown by finalizer (will be discarded):
    I/dalvikvm(  251): Ljava/lang/IllegalStateException;: Finalizing cursor android.database.sqlite.SQLiteCursor@43d293c0 on contacts_tags that has not been deactivated or closed
    I/dalvikvm(  251):  at android.database.sqlite.SQLiteCursor.finalize(SQLiteCursor.java:596)
    I/dalvikvm(  251):  at dalvik.system.NativeStart.run(Native Method)
    I/dalvikvm(  251): Uncaught exception thrown by finalizer (will be discarded):
    I/dalvikvm(  251): Ljava/lang/IllegalStateException;: Finalizing cursor android.database.sqlite.SQLiteCursor@43d28a28 on contacts_tags that has not been deactivated or closed
    I/dalvikvm(  251):  at android.database.sqlite.SQLiteCursor.finalize(SQLiteCursor.java:596)
    I/dalvikvm(  251):  at dalvik.system.NativeStart.run(Native Method)
    I/dalvikvm(  251): Uncaught exception thrown by finalizer (will be discarded):
    I/dalvikvm(  251): Ljava/lang/IllegalStateException;: Finalizing cursor android.database.sqlite.SQLiteCursor@43d26f70 on contacts_tags that has not been deactivated or closed
    I/dalvikvm(  251):  at android.database.sqlite.SQLiteCursor.finalize(SQLiteCursor.java:596)
    I/dalvikvm(  251):  at dalvik.system.NativeStart.run(Native Method)
    I/dalvikvm(  251): Uncaught exception thrown by finalizer (will be discarded):
    I/dalvikvm(  251): Ljava/lang/IllegalStateException;: Finalizing cursor android.database.sqlite.SQLiteCursor@43d26808 on contacts_tags that has not been deactivated or closed
    I/dalvikvm(  251):  at android.database.sqlite.SQLiteCursor.finalize(SQLiteCursor.java:596)
    I/dalvikvm(  251):  at dalvik.system.NativeStart.run(Native Method)
    I/dalvikvm(  251): Uncaught exception thrown by finalizer (will be discarded):
    I/dalvikvm(  251): Ljava/lang/IllegalStateException;: Finalizing cursor android.database.sqlite.SQLiteCursor@43d25e60 on contacts_tags that has not been deactivated or closed
    I/dalvikvm(  251):  at android.database.sqlite.SQLiteCursor.finalize(SQLiteCursor.java:596)
    I/dalvikvm(  251):  at dalvik.system.NativeStart.run(Native Method)
    I/dalvikvm(  251): Uncaught exception thrown by finalizer (will be discarded):
    I/dalvikvm(  251): Ljava/lang/IllegalStateException;: Finalizing cursor android.database.sqlite.SQLiteCursor@43d24310 on contacts_tags that has not been deactivated or closed
    I/dalvikvm(  251):  at android.database.sqlite.SQLiteCursor.finalize(SQLiteCursor.java:596)
    I/dalvikvm(  251):  at dalvik.system.NativeStart.run(Native Method)
    I/dalvikvm(  251): Uncaught exception thrown by finalizer (will be discarded):
    I/dalvikvm(  251): Ljava/lang/IllegalStateException;: Finalizing cursor android.database.sqlite.SQLiteCursor@43d23be0 on contacts_tags that has not been deactivated or closed
    I/dalvikvm(  251):  at android.database.sqlite.SQLiteCursor.finalize(SQLiteCursor.java:596)
    I/dalvikvm(  251):  at dalvik.system.NativeStart.run(Native Method)
    I/dalvikvm(  251): Uncaught exception thrown by finalizer (will be discarded):
    I/dalvikvm(  251): Ljava/lang/IllegalStateException;: Finalizing cursor android.database.sqlite.SQLiteCursor@43d23238 on contacts_tags that has not been deactivated or closed
    I/dalvikvm(  251):  at android.database.sqlite.SQLiteCursor.finalize(SQLiteCursor.java:596)
    I/dalvikvm(  251):  at dalvik.system.NativeStart.run(Native Method)
    I/dalvikvm(  251): Uncaught exception thrown by finalizer (will be discarded):
    I/dalvikvm(  251): Ljava/lang/IllegalStateException;: Finalizing cursor android.database.sqlite.SQLiteCursor@43d21780 on contacts_tags that has not been deactivated or closed
    I/dalvikvm(  251):  at android.database.sqlite.SQLiteCursor.finalize(SQLiteCursor.java:596)
    I/dalvikvm(  251):  at dalvik.system.NativeStart.run(Native Method)
    I/dalvikvm(  251): Uncaught exception thrown by finalizer (will be discarded):
    I/dalvikvm(  251): Ljava/lang/IllegalStateException;: Finalizing cursor android.database.sqlite.SQLiteCursor@43d21028 on contacts_tags that has not been deactivated or closed
    I/dalvikvm(  251):  at android.database.sqlite.SQLiteCursor.finalize(SQLiteCursor.java:596)
    I/dalvikvm(  251):  at dalvik.system.NativeStart.run(Native Method)
    I/dalvikvm(  251): Uncaught exception thrown by finalizer (will be discarded):
    I/dalvikvm(  251): Ljava/lang/IllegalStateException;: Finalizing cursor android.database.sqlite.SQLiteCursor@43d20688 on contacts_tags that has not been deactivated or closed
    I/dalvikvm(  251):  at android.database.sqlite.SQLiteCursor.finalize(SQLiteCursor.java:596)
    I/dalvikvm(  251):  at dalvik.system.NativeStart.run(Native Method)
    I/dalvikvm(  251): Uncaught exception thrown by finalizer (will be discarded):
    I/dalvikvm(  251): Ljava/lang/IllegalStateException;: Finalizing cursor android.database.sqlite.SQLiteCursor@43d1ebd0 on contacts_tags that has not been deactivated or closed
    I/dalvikvm(  251):  at android.database.sqlite.SQLiteCursor.finalize(SQLiteCursor.java:596)
    I/dalvikvm(  251):  at dalvik.system.NativeStart.run(Native Method)
    I/dalvikvm(  251): Uncaught exception thrown by finalizer (will be discarded):
    I/dalvikvm(  251): Ljava/lang/IllegalStateException;: Finalizing cursor android.database.sqlite.SQLiteCursor@43d1e480 on contacts_tags that has not been deactivated or closed
    I/dalvikvm(  251):  at android.database.sqlite.SQLiteCursor.finalize(SQLiteCursor.java:596)
    I/dalvikvm(  251):  at dalvik.system.NativeStart.run(Native Method)
    I/dalvikvm(  251): Uncaught exception thrown by finalizer (will be discarded):
    I/dalvikvm(  251): Ljava/lang/IllegalStateException;: Finalizing cursor android.database.sqlite.SQLiteCursor@43d1dae0 on contacts_tags that has not been deactivated or closed
    I/dalvikvm(  251):  at android.database.sqlite.SQLiteCursor.finalize(SQLiteCursor.java:596)
    I/dalvikvm(  251):  at dalvik.system.NativeStart.run(Native Method)
    I/dalvikvm(  251): Uncaught exception thrown by finalizer (will be discarded):
    I/dalvikvm(  251): Ljava/lang/IllegalStateException;: Finalizing cursor android.database.sqlite.SQLiteCursor@43d1bfa0 on contacts_tags that has not been deactivated or closed
    I/dalvikvm(  251):  at android.database.sqlite.SQLiteCursor.finalize(SQLiteCursor.java:596)
    I/dalvikvm(  251):  at dalvik.system.NativeStart.run(Native Method)
    I/dalvikvm(  251): Uncaught exception thrown by finalizer (will be discarded):
    I/dalvikvm(  251): Ljava/lang/IllegalStateException;: Finalizing cursor android.database.sqlite.SQLiteCursor@43d1b760 on contacts_tags that has not been deactivated or closed
    I/dalvikvm(  251):  at android.database.sqlite.SQLiteCursor.finalize(SQLiteCursor.java:596)
    I/dalvikvm(  251):  at dalvik.system.NativeStart.run(Native Method)
    I/dalvikvm(  251): Uncaught exception thrown by finalizer (will be discarded):
    I/dalvikvm(  251): Ljava/lang/IllegalStateException;: Finalizing cursor android.database.sqlite.SQLiteCursor@43d1ac40 on contacts_tags that has not been deactivated or closed
    I/dalvikvm(  251):  at android.database.sqlite.SQLiteCursor.finalize(SQLiteCursor.java:596)
    I/dalvikvm(  251):  at dalvik.system.NativeStart.run(Native Method)
    I/ActivityManager(   63): Displayed activity com.pankaj.myapp/.SelectedContactActivity: 2245 ms (total 2245 ms)

调用者活动正在使用列表视图，并且在单击列表项“SelectedContactActivity”活动调用后。

在调用者活动中

public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.contacts_list_item);
        SimpleAdapter contactAdapter = getAdapter(); // This method returns SimpleAdapter object 
       // Bind to our new adapter.
       setListAdapter(contactAdapter);
    }

protected void onListItemClick(ListView l, View view, int position, long id) {
        super.onListItemClick(l, view, position, id);

        Intent intent = new Intent().setClass(this, AddModifyTag.class);
        intent.putExtra("_id",contactInfo.get("_id"));
        intent.putExtra("name", contactInfo.get("name"));
        intent.putExtra("number", contactInfo.get("number"));
        intent.putExtra("position", position);
        this.startActivityForResult(intent, EDIT_CONTACT_TAGS);
    }

在调用的活动上

public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
......
......
        Cursor tags;
        db.open();
        tags = db.getContactTags(contactID);
        startManagingCursor(tags);
        .......
        .......
        db.close();
}

【问题讨论】：

在某些情况下您似乎没有关闭游标。请向我们展示您的活动代码。
在调用者活动中我使用了 SimpleAdapter 但我没有关闭该适配器，这是原因吗？并称为 Activity 我没有使用任何光标。
我也遇到了同样的情况。但我不知道我该怎么办。
你试过回答吗？如果是，您应该分享您的代码

标签： android android-logcat

【解决方案1】：

我认为您收到此错误是因为您没有关闭 onStop() 或 onDestroy() 中的 Cursor。尝试关闭Cursor。您也可以使用startManagingCursor() 为您提供Cursor，这将帮助您关闭Android 的光标。

【讨论】：

但是我使用的是SimpleAdapter，那我该怎么做呢？
您在onStop 或OnDestroy 中使用了tags.close(); 吗？
不，我没有，我要使用并再次检查。