Toast ,crash!

when the app's WXInstance destroy, but Weex page call toast()，sometimes app crash, because null point exception    context is null !!!, inside toast().

 

code class WXModalUIModule:

@JSMethod(uiThread = true)
public void toast(String param) {

String message = "";
int duration = Toast.LENGTH_SHORT;
if (!TextUtils.isEmpty(param)) {
try

{ param = URLDecoder.decode(param, "utf-8"); JSONObject jsObj = JSON.parseObject(param); message = jsObj.getString(MESSAGE); duration = jsObj.getInteger(DURATION); }

catch (Exception e)

{ WXLogUtils.e("[WXModalUIModule] alert param parse error ", e); }

}
if (TextUtils.isEmpty(message))

{ WXLogUtils.e("[WXModalUIModule] toast param parse is null "); return; }

if (duration > 3)

{ duration = Toast.LENGTH_LONG; }

else

{ duration = Toast.LENGTH_SHORT; }

if (toast == null) {

//crash here!!!! sometime, mWXSDKInstance.getContext() is null  !!!!
t*oast = Toast.makeText(mWXSDKInstance.getContext(), message, duration);*
} else

{ toast.setDuration(duration); toast.setText(message); }

toast.setGravity(Gravity.CENTER, 0, 0);
toast.show();
}

 

ps：when weex page closed, and wxSDKInstance destroy，but weex page still working on background like asynchronous request(network)，on this time.when the request is back, and call toast()，now context is null，bug show!