自定义 ArrayAdapter 不起作用？答案

【问题标题】：Custom ArrayAdapter not Working?自定义 ArrayAdapter 不起作用？
【发布时间】：2009-12-30 03:27:01
【问题描述】：

这是我让代码正常工作，尝试添加其他内容，然后发现我之前的代码停止工作的情况之一。程序启动时崩溃。该错误似乎与 ArrayAdapter 自定义类的定义有关，就好像我尝试使用内置适配器一样，它工作正常。有什么帮助吗？

public class MainEntry extends ListActivity{    

private String[] items = {"yay","yay2","asdfa","nlah","lipsum","orum","rawr"};



/** Called when the activity is first created. */
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setListAdapter(new IconicAdapter());
}


class IconicAdapter extends ArrayAdapter {
    IconicAdapter(){
        super(MainEntry.this, R.layout.post_obj, items);
    }

    public View getView(int pos, View convertView, ViewGroup parent){
        LayoutInflater inf = getLayoutInflater();

        View row = null;
        if(convertView==null){
            inf.inflate(R.layout.post_obj, parent, false);
        }else{
            row = convertView;
        }
        inf.inflate(R.layout.post_obj, parent, false);

        TextView label = (TextView) row.findViewById(R.id.label);
        label.setText(items[pos]);

        ImageView image = (ImageView) row.findViewById(R.id.icon);
        image.setImageResource(((Math.random()>.5)?R.drawable.wolfire:R.drawable.android)); //temp

        return row;
    }

}

}

如果有帮助，这里是 LogCat 日志：

12-29 23:43:49.968: INFO/ActivityManager(564): Start proc com.test.TestApp for 

activity com.test.TestApp/.MainEntry: pid=783 uid=10023 gids={1015}
12-29 23:43:50.118: INFO/jdwp(783): received file descriptor 10 from ADB
12-29 23:43:50.188: DEBUG/ddm-heap(783): Got feature list request
12-29 23:43:50.318: WARN/ActivityThread(783): Application com.test.TestApp is waiting for the debugger on port 8100...
12-29 23:43:50.348: INFO/System.out(783): Sending WAIT chunk
12-29 23:43:50.348: INFO/dalvikvm(783): Debugger is active
12-29 23:43:50.577: INFO/System.out(783): Debugger has connected

12-29 23:43:50.577: INFO/System.out(783): waiting for debugger to settle...
12-29 23:43:50.638: INFO/ARMAssembler(564): generated scanline__00000077:03515104_00001001_00000000 [ 64 ipp] (84 ins) at [0x2c2900:0x2c2a50] in 1189200 ns
12-29 23:43:50.778: INFO/System.out(783): waiting for debugger to settle...
12-29 23:43:50.987: INFO/System.out(783): waiting for debugger to settle...
12-29 23:43:51.187: INFO/System.out(783): waiting for debugger to settle...
12-29 23:43:51.387: INFO/System.out(783): waiting for debugger to settle...
12-29 23:43:51.597: INFO/System.out(783): waiting for debugger to settle...
12-29 23:43:51.800: INFO/System.out(783): waiting for debugger to settle...
12-29 23:43:52.003: INFO/System.out(783): waiting for debugger to settle...
12-29 23:43:52.206: INFO/System.out(783): waiting for debugger to settle...
12-29 23:43:52.218: INFO/ActivityManager(564): Killing process com.test.TestApp (pid=783) at user's request
12-29 23:43:52.228: INFO/Process(564): Sending signal. PID: 783 SIG: 9
12-29 23:43:52.238: INFO/ActivityManager(564): Process com.test.TestApp (pid 783) has died.
12-29 23:43:52.298: WARN/UsageStats(564): Unexpected resume of com.android.launcher while already resumed in com.test.TestApp
12-29 23:43:52.348: WARN/InputManagerService(564): Window already focused, ignoring focus gain of: com.android.internal.view.IInputMethodClient$Stub$Proxy@43944340
12-29 23:43:57.517: DEBUG/dalvikvm(719): GC freed 726 objects / 64112 bytes in 83ms

【问题讨论】：

你能详细说明一下现在什么不起作用，或者你在上面的代码中看到了什么？
啊，对不起。它只是在启动时强制关闭。
考虑添加 cmets 和 JavaDoc，尤其是当您发布代码供他人阅读时。其次，编写单元测试。这将帮助您检测行为变化。

标签： java android

【解决方案1】：

啊……我真是个白痴。哈哈。我实际上并没有将“行”设置为 inf.inflate() 的值。

面部护理是的。忽略这个。好吧，希望其他人会发现该代码很有用。

【讨论】：

【解决方案2】：

你是对的 (row = inf.inflate...)，你应该有一个 NullPointerException。另外，您必须删除第二个电话 inf.inflate(R.layout.post_obj, parent, false);。否则，您将失去convertView 授予的优化...

【讨论】：