相关疑难解决方法(0)

我正在创建一个需要登录的应用程序.我创建了主要和登录活动.

在主要活动onCreate方法中,我添加了以下条件:

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    ...

    loadSettings();
    if(strSessionString == null)
    {
        login();
    }
    ...
}

onActivityResult登录表单终止时执行的方法如下所示:

@Override
public void onActivityResult(int requestCode,
                             int resultCode,
                             Intent data)
{
    super.onActivityResult(requestCode, resultCode, data);
    switch(requestCode)
    {
        case(SHOW_SUBACTICITY_LOGIN):
        {
            if(resultCode == Activity.RESULT_OK)
            {

                strSessionString = data.getStringExtra(Login.SESSIONSTRING);
                connectionAvailable = true;
                strUsername = data.getStringExtra(Login.USERNAME);
            }
        }
    }

问题是登录表单有时会出现两次(login()方法被调用两次),当手机键盘滑动时,再次出现登录表单,我猜问题是变量strSessionString.

有没有人知道如何设置变量global以避免在用户已经成功验证后出现登录表单？

我有2个活动:第一个有一个带有搜索视图的操作栏,第二个应该显示搜索查询的结果.

androidmanifest:

    <activity
        android:name=".SearchActivity"

        ...
        android:launchMode="singleTop">           

        <meta-data
            android:name="android.app.searchable"
            android:resource="@xml/searchable" />
        ...

    </activity>

   <activity
        android:name=".ResultsActivity"
        ...

         <intent-filter>
            <action android:name="android.intent.action.SEARCH" />
        </intent-filter>

    </activity>

searchable.xml

<searchable
xmlns:android="http://schemas.android.com/apk/res/android"
android:label="@string/app_name"
android:hint="@string/enter_a_word" />

SearchActivity

....
@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_noun_list, menu);

    // Associate searchable configuration with the SearchView
    SearchManager searchManager =  (SearchManager) getSystemService(Context.SEARCH_SERVICE);
    SearchView searchView =  (SearchView) menu.findItem(R.id.search).getActionView();
    searchView.setSearchableInfo( searchManager.getSearchableInfo(getComponentName()));

    return true;
}
....

ResultsActivity:

@Override
protected void onCreate(Bundle …