Handler 类应该应该为static类型,否则有可能造成泄露。在程序消息队列中排队的消息保持了对目标Handler类的应用。如果Handler是个内部类,那 么它也会保持它所在的外部类的引用。为了避免泄露这个外部类,应该将Handler声明为static嵌套类,并且使用对外部类的弱应用。
static class MyHandler extends Handler
{
WeakReference<PopupActivity> mActivity;
MyHandler(PopupActivity activity)
{
mActivity = new WeakReference<PopupActivity>(activity);
}
@Override
public void handleMessage(Message msg)
{
PopupActivity theActivity = mActivity.get();
switch (msg.what)
{
case 0:
theActivity.popPlay.setChecked(true);
break;
}
}
}
MyHandler ttsHandler = new MyHandler(this);
private Cursor mCursor;
private void test()
{
ttsHandler.sendEmptyMessage(0);
}