Android 2.3.3警报对话框中的向前兼容性问题

Question

Android 2.3.3 HTC Desire HD的警告对话框出现问题。

创建列表视图以显示项目

ArrayList<HashMap<String,String>> lst = new ArrayList<HashMap<String,String>>();
for (int i = 0; i < m_lstSettings.size(); i++)
    lst.add( new HashMap<String,String>());

// While we are setting a list adapter, we are only using it to hold the
// structure of the list.  We will actually override its data in getView()
// before displaying it.
setListAdapter(
    new SimpleAdapter(
        this,
        lst,
        R.layout.settings_row,
        new String[] { "text1","text2" },
        new int[] { android.R.id.text1, android.R.id.text2 }
   ) {
        /**
        * Override for the getView() method.  This allows us to alter the display
        * attributes on a line-by-line basis.  We also use this opportunity to
        * fill in the text fields with the right values.
        */
        @Override
        public View getView(int iPos, View oConvertView, ViewGroup oParent)
        {
            // Fetch list item based on position
            ListItem oItem = m_lstSettings.get(iPos);

            // create view for this row from xml layout file
            View oView = m_oInflater.inflate(R.layout.settings_row, null); 

            // for some reason, the logic in this method call seems to be reversed,
            // but it works this way
            oView.setClickable(oItem.m_bLocked); 

            // set up the label text view
            TextView tvLabel = (TextView) oView.findViewById(android.R.id.text1);
            if (tvLabel != null)
            {
                tvLabel.setText(oItem.m_sLabel);
                tvLabel.setEnabled(!oItem.m_bLocked);
            }

            // set up the value text view
            TextView tvValue = (TextView) oView.findViewById(android.R.id.text2);

            if (tvValue != null) {
                tvValue.setText(oItem.m_sValue);
                tvValue.setEnabled(!oItem.m_bLocked);
            }
        }

        return oView;
    }
}
);

/**
* Click handler for the list items.  Will create the appropriate edit 
* box for the clicked setting.
*/
@Override
public void onListItemClick(ListView oParent, View v, int iPos, long id)
{
    // inflate the xml layout
    final View oView = m_oInflater.inflate(R.layout.settings_edit, null);
    final ListView oParentListView = oParent;
    final SettingsListItem oItem = m_lstSettings.get(iPos);

    // set label
    TextView tv = (TextView) oView.findViewById(R.id.TextViewEditSettings);
    if (tv != null)
        tv.setText(oItem.m_sLabel);

    // set value
    tv = (TextView) oView.findViewById(R.id.EditTextEditSettings);
    if (tv != null) {
        tv.setText(oItem.m_sValue);
        tv.setInputType(InputType.TYPE_CLASS_TEXT);
    }


    // special input validator for integers
    if (oItem.m_bTypeInt)
        tv.setInputType(InputType.TYPE_CLASS_NUMBER);

    userName = m_lstSettings.get(3).m_sValue;

    // show dialog
    new AlertDialog.Builder(this)
        .setTitle(getString(R.string.Label_Edit) + " " + oItem.m_sLabel)
        .setView(oView)
        .setPositiveButton(R.string.main_connection_button_ok_button,
            new DialogInterface.OnClickListener() 
            {
                public void onClick(DialogInterface dialog, int whichButton)
                {
                    TextView tv = (TextView) oView.findViewById(R.id.EditTextEditSettings);
                    oItem.m_sValue = tv.getText().toString(); 

                    InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
                    imm.hideSoftInputFromWindow(tv.getWindowToken(), 0);



                    oParentListView.invalidate();
                    dialog.dismiss();
                }
            })
        .setNegativeButton(android.R.string.cancel,
            new DialogInterface.OnClickListener()
            {
                public void onClick(DialogInterface dialog, int whichButton)
                {
                    TextView tv = (TextView) oView.findViewById(R.id.EditTextEditSettings);
                    InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
                    imm.hideSoftInputFromWindow(tv.getWindowToken(), 0);
                    dialog.dismiss();
                }
            })
        .show();

}

XML文件：

settings_row.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:padding="5dip"

    android:background="@color/message_list_item_background"
    >

    <TextView android:id="@android:id/text1"
        android:textSize="24sp"
        android:textStyle="bold"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"/>

    <TextView android:id="@android:id/text2"
        android:textSize="16sp"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"/>

</LinearLayout>

settings_edit.xml

<?xml version="1.0" encoding="utf-8"?>

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:padding="10dip"
    >

    <TextView
        android:gravity="left"
        android:text=""
        android:id="@+id/TextViewEditSettings"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content">
    </TextView>

    <EditText
        android:gravity="left"
        android:text=""
        android:id="@+id/EditTextEditSettings"
        android:layout_width="fill_parent"
        android:singleLine="true"
        android:layout_height="wrap_content">
    </EditText>

</LinearLayout>

首先使用上面的代码我们创建列表视图，点击每个项目后，它会显示一个警告对话框以输入输入。

列表中有6个项目。单击第4项后，应用程序崩溃。它只能在HTC Desire HD上重现。应用程序在其他Android 2.3设备上运行良好，例如Google Nexus S和Sony Ericsson Arc。