Question

我有一个名为ListApp的应用程序，就像这个

public class ListApp extends Application {

public static RSmovies[] appRsMovie=new RSmovies[1];
public static ImageDownloader id =new ImageDownloader();
public static String cur=null;
public static String movieGetInfo="http://hive.tn/TMDb/test11.php?param=";

}

在我的第一个活动中，我尝试在新线程中修改appRsMovie，就像这样

new Thread(new Runnable() {
        @Override
        public void run() {

            try {
                InputStream source = retrieveStream("http://hive.tn/TMDb/test6.php");
                Gson gson = new Gson();

                Reader reader = new InputStreamReader(source);
                    ListApp.appRsMovie = gson.fromJson(reader, RSmovies[].class);

                lv
                        .setAdapter(new LazyAdapter1(
                                ListControlActivity.this, z));
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }).start();

应用程序崩溃，这是我得到的例外

12-26 17:21:55.643: W/dalvikvm(958): Exception Ljava/lang/RuntimeException; thrown during Lcom/test/list/ListApp;.<clinit>

Answer 1

试试这个：

尝试移动声明

lv.setAdapter(new LazyAdapter1(ListControlActivity.this, z));

从线程到Handler

创建一个处理程序：

    Handler handler = new Handler() {

    public void handleMessage(android.os.Message msg) {
        lv.setAdapter(new LazyAdapter1(ListControlActivity.this, z));
    }
};

并用handler的sendMessage

替换lv.setAdapter语句

new Thread(new Runnable() {
    @Override
    public void run() {

        try {
            InputStream source = retrieveStream("http://hive.tn/TMDb/test6.php");
            Gson gson = new Gson();

            Reader reader = new InputStreamReader(source);
                ListApp.appRsMovie = gson.fromJson(reader, RSmovies[].class);

            handler.sendEmptyMessage(0);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}).start();

Answer 2

您无法从UI线程以外的任何线程更新列表视图（或任何其他视图）。使用AsyncTask代替普通帖子，并确保更新onPostExecute()中的列表视图。

活动和线程之间的共享数据

2 个答案: