android - 如何处理配置更改时的** GridView **？

Question

我在应用程序的 Activity 中使用 GridView 。每个 GridView 行包含三个复选框，可以根据用户想要从数据库中查询的内容设置为选中/未选中。该 Activity 还包括一个 editText，它会在每次 Activity 开始时导致 onScreenKeyboard 出现，我在这里遇到了问题。 OnScreenKeyboard，当出现干扰 gridview 时，它的一些 checkboxes 就会消失。我的想法是每次配置更改时刷新 GridView 。我尝试通过 onRetainNonConfigurationInstance() 返回一个对象来处理这个问题。对象包含一个数组列表来填充我的 gridview 行，但是当我使用 getLastNonConfigurationInstance() 检索返回的对象时，onCreate() 显示 null。任何人都可以建议我如何处理这个问题，或者是否有任何其他可用的方法可以使我的 gridView 在配置更改时表现正常。以下是代码，我想说清楚我已经在 list 文件中添加了 keyboardHidden 配置更改但是当键盘出现时它有时不会触发 onConfigurationChanged()

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.failureselection);
    findLocalWidgets(); //Initializes Layout Objects

    if(configchanged){
                    //Re populate grid view
                        customDataGridRows = (ArrayList<CustomGridViewRow>) getLastNonConfigurationInstance();
                        dgvwFailures.setAdapter(new CustomGridViewAdapter(this,
                                customDataGridRows));

                                configchanged = false;
                      }else{
                            fillFailuresList(customDataGridRows);
                            dgvwFailures.setAdapter(new CustomGridViewAdapter(this,
                                    customDataGridRows));
                    }

    }


@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    setContentView(R.layout.failureselection);

    configchanged = true;
}


@Override
public Object onRetainNonConfigurationInstance() {

    return customDataGridRows;
}

private boolean fillFailuresList(
        ArrayList<CustomGridViewRow> customDataGridRows) {
    boolean isFilled = false;
    try {
        // Adding Failures data
        customDataGridRows.add(new CustomGridViewRow(false, "Hood", false,
                "Assembly Defect", false, "Masking Poor"));
        customDataGridRows.add(new CustomGridViewRow(false, "Floor", false,
                "Forget Work", false, "Assembly Defect"));
        customDataGridRows.add(new CustomGridViewRow(false, "Grill", false,
                "Incorrect Assembly", false, "Bad Company"));
        customDataGridRows.add(new CustomGridViewRow(false,
                "R Right Frame", false, "Interference", false,
                "Fix Large Effort"));
        customDataGridRows.add(new CustomGridViewRow(false, "R Left Frame",
                false, "Leakage", false, "High Incidence"));
        customDataGridRows.add(new CustomGridViewRow(false, "R Frame",
                false, "Dirt", false, "Recurrence"));
        customDataGridRows.add(new CustomGridViewRow(false,
                "Outside R Frame", false, "Decal", false, "Checking"));
        customDataGridRows.add(new CustomGridViewRow(false,
                "F Right Frame", false, "Other", false, "Foreign Body"));
        customDataGridRows.add(new CustomGridViewRow(false, "F Left Frame",
                false, "", false, "Not Caulking"));
        customDataGridRows.add(new CustomGridViewRow(false, "F Frame",
                false, "", false, "Painting Defect"));
        customDataGridRows.add(new CustomGridViewRow(false,
                "Outsie F Frame", false, "", false, "Other"));
        customDataGridRows.add(new CustomGridViewRow(false, "", false, "",
                false, ""));

        // Populating Failures grid view
//      dgvwFailures.setAdapter(new CustomGridViewAdapter(this,
//              customDataGridRows));

        isFilled = true;

    } catch (Exception e) {
        e.getMessage();
    }
    return isFilled;

}

Answer 1

几个选项:

1. How to prevent Custom Views from losing state across screen orientation changes为你的 CustomGridViewRow .
2. 在您的适配器中创建一个方法并将值放入一个包中，并在创建时使用 savedInstanceState 恢复它

提示:删除任何 <requestFocus />从你的 EditText 布局。尽管 Android 会将焦点设置到第一个可聚焦 View 。

另一个黑客:How to remove focus without setting focus to another control?