Question

这是我的第一堂课的一些代码

   result = "ok&rent##18##20000000##80##500000##2##shofaj --- kaf parkeet ....##http://www.studentuniverse.com/student-blog/wp-content/uploads/2013/07/iStock_000017716462Medium-e1374689640445.jpg##http://www.studentuniverse.com/student-blog/wp-content/uploads/2013/07/apps.jpeg## " ;
            String []respon = result.split("&");

                Intent in = new Intent(getApplicationContext(), Show_item_select.class);
                in.putExtra("url", respon[1]);
                in.putExtra("code", Select_Data.get_id());
                in.putExtra("itm",itm);
                in.putExtra("urls", urls);
                startActivity(in);

这是我的secend类的一些代码

   String s= getIntent( ).getStringExtra("url");
            code = getIntent().getStringExtra("code");
            itm =getIntent().getIntExtra("itm",0);
            urls = s.split("##");
            urls_all = getIntent().getStringExtra("urls");

当progrom转到secend类并读取第一行程序stoped并显示写入Source not found的页面时，这是主题：

    ActivityThread.performLaunchActivity(ActivityThread$ActivityClientRecord, Intent) line: 2032.

DalvikVM[localhost:8602]    
    Thread [<1> main] (Suspended)   
        ActivityThread.performLaunchActivity(ActivityThread$ActivityClientRecord, Intent) line: 2032    
        ActivityThread.handleLaunchActivity(ActivityThread$ActivityClientRecord, Intent) line: 2135 
        ActivityThread.access$700(ActivityThread, ActivityThread$ActivityClientRecord, Intent) line: 140    
        ActivityThread$H.handleMessage(Message) line: 1237  
        ActivityThread$H(Handler).dispatchMessage(Message) line: 99 
        Looper.loop() line: 137 
        ActivityThread.main(String[]) line: 4921    
        Method.invokeNative(Object, Object[], Class, Class[], Class, int, boolean) line: not available [native method]  
        Method.invoke(Object, Object...) line: 511  
        ZygoteInit$MethodAndArgsCaller.run() line: 1038 
        ZygoteInit.main(String[]) line: 805 
        NativeStart.main(String[]) line: not available [native method]  
    Thread [<10> Binder_2] (Running)    
    Thread [<9> Binder_1] (Running) 
    Thread [<11> Binder_3] (Running)    
    Thread [<12> AsyncTask #1] (Running)    
    Thread [<13> AsyncTask #2] (Running)    
    Thread [<14> AsyncTask #3] (Running)

任何人都知道为什么会这样？

Answer 1

尝试并更改

String s = getIntent().getStringExtra("url");

的

String s = getIntent().getExtras().getString("url");

检查 extras 捆绑包是否已初始化也是一种很好的做法，如下所示.-

String s = null;
Bundle extras = getIntent().getExtras();
if (extras != null) {
    s = extras.getString("url");
}

最后，您应该考虑使用常量作为额外名称，以确保将来不会出现拼写错误。

为什么当我将数据发送到另一个活动并在其他活动中，我想让它停止项目？

1 个答案: