Handler在Activity和Fragment中的記憶體洩露問題
解決方法：將handler宣告為static靜態方法
在activity中：
private final MyHandler handler=new MyHandler(this);//在activity中宣告handler
private static class MyHandler extends Handler {
private final WeakReference mActivityReference;
MyHandler(Activity activity) {
this.mActivityReference=new WeakReference<>(activity);
}
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
final MainActivity activity = (MainActivity)mActivityReference.get();//獲取弱引用佇列中的activity
if(activity!=null){
switch(msg.what) {//獲取訊息，更新UI
}
}
}
}
//訊息佇列裡面的訊息移除
@Override
protected voidonDestroy() {
super.onDestroy();
_handler.removeCallbacksAndMessages(null);
context=null;
}
在fragment中
private final MyHandler handler=new MyHandler(this);//在activity中宣告handler
private static class MyHandler extends Handler {
private final WeakReference mFragmentReference;
MyHandler(Fragment fragment) {
this.mFragmentReference=new WeakReference<>(fragment);
}
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
final MainFragment fragment= (MainFragment)mFragmentReference.get();
if(fragment!=null){
switch(msg.what) {//獲取訊息，更新UI
}
}
}
}
//訊息佇列裡面的訊息移除
@Override
protected voidonDestroy() {
super.onDestroy();
_handler.removeCallbacksAndMessages(null);
}