android选项卡布局中的进度对话框

我正在处理选项卡布局和进度对话框。我想在用户进入选项卡布局和用户更改选项卡时显示进度对话框五秒钟

在这两种情况下，我都使用了下面相同的代码来显示进度对话框

public class TabLayoutActivity extends TabActivity {
    ProgressDialog progressDialog;

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.tablayoutview);
        progressDialog = ProgressDialog.show(TabLayoutActivity.this, "",
                "Loading. Please wait...");
        new Thread() {
            public void run() {
                try {
                    Thread.sleep(5000);
                    TabHost tabHost = getTabHost();
                    TabHost.TabSpec tabSpec;
                    Intent intent = new Intent().setClass(
                            getApplicationContext(), FirstTabActivity.class);
                    tabSpec = tabHost.newTabSpec("first").setIndicator("First")
                            .setContent(intent);
                    tabHost.addTab(tabSpec);

                    intent = new Intent().setClass(getApplicationContext(),
                            SecondTabActivity.class);
                    tabSpec = tabHost.newTabSpec("second")
                            .setIndicator("Second").setContent(intent);
                    tabHost.addTab(tabSpec);
                } catch (Exception e) {
                    Log.e("tag", e.getMessage());
                }
                progressDialog.dismiss();
            }
        }.start();
    }
}

“进度”对话框工作正常，但选项卡的内容不显示。它显示以下错误

---

“只有创建视图层次结构的原始线程才能接触其视图”

我猜它在

progressDialog.dismise（）中崩溃，因为您试图从非UI线程中删除。为了防止这种行为，您应该在UI/主线程中运行它，如下所示：

runOnUiThread(new Runnable() {
            public void run() {
                progressDialog.dismiss();
            }
        });

试试这个

public class TabLayoutActivity extends TabActivity {
ProgressDialog progressDialog;

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.tablayoutview);
    progressDialog = ProgressDialog.show(TabLayoutActivity.this, "",
            "Loading. Please wait...");
    new Thread() {
        public void run() {
            try {
                Thread.sleep(5000);
 TabLayoutActivity .this.runOnUiThread(new Runnable() {

    @Override
    public void run() {
        TabHost tabHost = getTabHost();
                TabHost.TabSpec tabSpec;
                Intent intent = new Intent().setClass(
                        getApplicationContext(), FirstTabActivity.class);
                tabSpec = tabHost.newTabSpec("first").setIndicator("First")
                        .setContent(intent);
                tabHost.addTab(tabSpec);

                intent = new Intent().setClass(getApplicationContext(),
                        SecondTabActivity.class);
                tabSpec = tabHost.newTabSpec("second")
                        .setIndicator("Second").setContent(intent);
                tabHost.addTab(tabSpec);
              progressDialog.dismiss();
    }
});

            } catch (Exception e) {
                Log.e("tag", e.getMessage());
            }

        }
    }.start();
}

}
TabActivity不推荐使用。您应该改用片段。您正在UI线程之外向UI添加元素。这就是为什么你会看到这个错误。