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如何在android中的tablayout的一个选项卡中将方法onWindowFocusChanged（boolean）设置为true（或调用）..

解释：

在默认活动中自动调用的tablayout onWindowFocusChanged（）（true），但是当我们单击/触摸到下一个选项卡（调用另一个活动）时无法调用onWindowFocusChanged（）！！！！！！如何在第二个选项卡中调用 onWindowFocusChanged()？

源代码：

public class TabTestActivity extends TabActivity {

        public void onCreate(Bundle savedInstanceState) {

            super.onCreate(savedInstanceState);

            setContentView(R.layout.main);



            Resources res = getResources();

            TabHost tabHost = getTabHost();  

            TabHost.TabSpec spec;  

            Intent intent;  



            // Create an Intent to launch an Activity for the tab (to be reused)

            intent = new Intent().setClass(this, TabOne.class);



            // Initialize a TabSpec for each tab and add it to the TabHost

            spec = tabHost.newTabSpec("TabOne").setIndicator("TabOne",

                              res.getDrawable(R.drawable.ic_tab_One))

                          .setContent(intent);

            tabHost.addTab(spec);



            // Do the same for the other tabs

            intent = new Intent().setClass(this, TabTwo.class);

            spec = tabHost.newTabSpec("TabTwo").setIndicator("TabTwo",

                              res.getDrawable(R.drawable.ic_tab_az))

                          .setContent(intent);

            tabHost.addTab(spec);
            //tabHost.setCurrentTab(2);

        }


                  public void onWindowFocusChanged(boolean hasFocus) {

                    // TODO Auto-generated method stub

                     Toast.makeText(this, ""+hasFocus , Toast.LENGTH_LONG).show();

                       super.onWindowFocusChanged(hasFocus);

                    }
  }
 -----------------------------------------------------------------------------------------------------   

    public class TabOne extends Activity {

         public void onCreate(Bundle savedInstanceState) {

                super.onCreate(savedInstanceState);

                TextView textview = new TextView(this);

                textview.setText("This is the Coll tab");

                setContentView(textview);

            }

        @Override

        public void onWindowFocusChanged(boolean hasFocus) {

            // TODO Auto-generated method stub



            Toast.makeText(this, "On window One"+hasFocus , Toast.LENGTH_LONG).show();

            super.onWindowFocusChanged(hasFocus);

        }

    }

--------------------------------------------------------------------------    

    public class TabTwo extends Activity {

         public void onCreate(Bundle savedInstanceState) {

                super.onCreate(savedInstanceState);



                TextView textview = new TextView(this);

                textview.setText("This is the Coll tab");

                setContentView(textview);

            }



        @Override

        public void onWindowFocusChanged(boolean hasFocus) {

            // TODO Auto-generated method stub

            Toast.makeText(this, "On window TabTwo"+hasFocus , Toast.LENGTH_LONG).show();

            super.onWindowFocusChanged(hasFocus);


        }

  }

TabTwo 活动运行时未调用 TabTwo 的 (2ndTab) onWindowFocusChanged 请给出解决方案。我试图提供 tabHost.setFocusable(true); 我没有工作！！！

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1 回答 1

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标签基本上已被弃用。您应该改用片段。这将清楚地处理您的问题。

有关如何执行此操作的示例，请参见：https ://stackoverflow.com/questions/9714650/converting-tabactivity-into-fragmentactivity。

于 2012-07-12T07:05:40.873 回答