Question

我需要在点击标签

时显示进度对话框

我的代码ID

public class SIPTabWidget extends TabActivity{
 Intent intent;
  @Override
    protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);


    setContentView(R.layout.main);



    final Resources res = getResources(); // Resource object to get Drawables
    final TabHost tabHost = getTabHost(); // The activity TabHost
    TabHost.TabSpec spec; // Reusable TabSpec for each tab



    // Create an Intent to launch an Activity for the tab (to be reused)
    intent = new Intent().setClass(this, ListContacts.class);

    // Initialize a TabSpec for each tab and add it to the TabHost
    spec = tabHost
    .newTabSpec("contacts")
    .setIndicator("",
        res.getDrawable(R.drawable.tab_contacts))
        .setContent(intent);



    tabHost.addTab(spec);

    intent = new Intent().setClass(this, Dialer.class);
    spec = tabHost
    .newTabSpec("dialer")
    .setIndicator("", res.getDrawable(R.drawable.tab_dial))
    .setContent(intent);
    tabHost.addTab(spec);


    intent = new Intent().setClass(this, Favorites.class);
    spec = tabHost
    .newTabSpec("favorites")
    .setIndicator("", res.getDrawable(R.drawable.tab_favorites))
    .setContent(intent);
    tabHost.addTab(spec);

    intent = new Intent().setClass(this, org.sipdroid.sipua.ui.Settings.class);
    spec = tabHost
    .newTabSpec("settings")
    .setIndicator("", res.getDrawable(R.drawable.tab_settings))
    .setContent(intent);

    tabHost.addTab(spec);

}

当我单击设置选项卡时，调用设置活动，在其oncreate中我给出了

final ProgressDialog dialog = ProgressDialog.show(getParent(), "Please wait..", "Doing stuff..", true);
        dialog.setCancelable(false);
        dialog.show();

enter image description here

对我来说，在显示“设置”布局之前需要一些时间来加载布局，所以在此之前我需要显示ProgressDialog，表示时间当我点击“设置”选项卡时我需要关闭选项卡更改为设置

时的对话框

tabHost.setOnTabChangedListener(new OnTabChangeListener() {

        @Override
        public void onTabChanged(String tabId) {
        System.out.println(" Tab ID:  "+tabId);
if(tabId.equals("dial")){
dialog .dismiss();
}

    }
});

Settings.class

public class Settings extends PreferenceActivity implements OnSharedPreferenceChangeListener, OnClickListener {

@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        System.out.println("Settings oncreate");
        final ProgressDialog dialog = ProgressDialog.show(getParent(), "Please  wait..", "Doing stuff..", true);
        handler = new Handler() {

              @Override
              public void handleMessage(Message msg) {
              dialog.dismiss();

              }
           };


           Thread t = new Thread() {
                public void run() {
                    //send message
                handler.sendEmptyMessage(0);      
                }
            };  





       if (Receiver.mContext == null) Receiver.mContext = this;
        addPreferencesFromResource(R.xml.preferences);
        setDefaultValues();
        Codecs.check();
        t.start





    }

Answer 1

每个标签都是一个活动......我想what is taking time在设置活动中......

将其放入设置活动：

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final ProgressDialog dialog = ProgressDialog.show(getParent(), "Please wait..", "Doing stuff..", true);
dialog.setCancelable(false);
dialog.show(); 
Runnable myRun = new Runnable(){
public void run(){
    Looper.myLooper().prepare();
    //DO EVERYTHING YOU WANT!

    //Finally
    runOnUiThread(new Runnable() {
    @Override
    public void run() {
    dialog.dismis();
    }
    });
}
};
Thread T = new Thread(myRun);
T.start();

请记住：在此块中run()

//DO EVERYTHING YOU WANT!

如果需要更改UI，则必须使用

执行此操作

    runOnUiThread(new Runnable() {
    @Override
    public void run() {
        //DO IT
    }
    });

Answer 2

您可以使用android的asyntask功能来显示进度对话框，请参阅此http://developer.android.com/reference/android/os/AsyncTask.html

Answer 3

请参阅我的回答

"Rotating wheel" progress dialog while deleting folder from SD card

或者您必须执行异步任务才能执行此操作。

Answer 4

如果getParent（）不适合您，请尝试仅使用TabsActivity.context（或替换父标签活动类的名称）。我正在使用嵌套活动，因此使用getParent（）仍然没有为对话框返回正确的上下文。

在尝试了上述建议的20种不同变体后，我更换了这一行：

AlertDialog.Builder builder = new AlertDialog.Builder(this);

使用：

AlertDialog.Builder builder = new AlertDialog.Builder(TabsActivity.context);

它就像一个魅力。您还需要在TabsActivity类中创建上下文变量。类似于onCreate方法中的public static TabsActivity context;和context=this。

在android选项卡布局中显示进度对话框

4 个答案: