如何在android中使用LayoutInflater从动态创建的EditText中获取数据？

Question

这是像这样动态创建的相对布局视图：

... 所以我的问题是如何从这些动态元素中获取值并执行一些计算以在同样动态创建的 textview 上显示结果。 提前谢谢大家！！

    public void goButtonClicked(View view) {
    maalContainer.removeAllViews();
    int numberofPlayersTolayout = (Integer) Integer.parseInt((String) numberOfPlayers.getSelectedItem());

    LayoutInflater inflater = (LayoutInflater) getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    LayoutParams params = new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);

    for (int i = 0; i < numberofPlayersTolayout; i++) {
        View dynamicEntryView = inflater.inflate(R.layout.player_entry_item, null);
        maalContainer.addView(dynamicEntryView, params);
    }

}

}

Answer 1

for (int i = 0; i < maalContainer.getChildCount(); i++) {
    View view = maalContainer.getChildAt(i);

    EditText ed_item = (EditText) view
            .findViewById(R.id.edittext1);
    EditText ed_value = (EditText) view
            .findViewById(R.id.edittext2);
    EditText ed_value1 = (EditText) view
            .findViewById(R.id.edittext3);

    ed_item.getText().toString().trim();
    ed_value.getText().toString().trim();
    ed_value1.getText().toString().trim();
}

Answer 2

无需分配/获取任何视图的 ID，但最好的方法是遍历 LinearLayout 的子视图：

int childcount = myLinearLayout.getChildCount();
for (int i=0; i < childcount; i++){
      View v = myLinearLayout.getChildAt(i);
    // do whatever you would want to do with this View
}

Answer 3

这里有几件事：

1. 您不应该使用Application Context 来获取LayoutInflater。你应该从ActivityContext 那里得到它，否则你的主题和风格将不会得到尊重。

2. 您不应该将 null 作为第二个参数进行膨胀（除非在您不知道 View 的父级的特殊情况下）。只需将android:layout_width="match_parent" 和android:layout_height="wrap_content" 属性放在player_entry_item.xml 中，它们就会在通货膨胀时得到尊重。

3. 在膨胀时将 EditText 对象存储为私有数组。

话虽如此，我建议的修订：

private EditText[] mEditTextPlayers;

public void goButtonClicked(View view) {
    maalContainer.removeAllViews();
    int numPlayers = Integer.parseInt((String) numberOfPlayers.getSelectedItem());

    LayoutInflater inflater = LayoutInflater.from(view.getContext());
    mEditTextPlayers = new EditText[numPlayers];

    for (int i = 0; i < numPlayers; i++) {
        //Pass the parent as the second parameter to retain layout attributes
        mEditTextPlayers[i] = inflater.inflate(R.layout.player_entry_item, maalContainer, false);
        maalContainer.addView(dynamicEntryView);
    }
}

Answer 4

     public void goButtonClicked(View view) {
         int numberofPlayersTolayout =       Integer.parseInt(numberOfPlayers.getSelectedItem().toString());
        LayoutInflater inflater = (LayoutInflater)  getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        LayoutParams params = new LayoutParams(LayoutParams.FILL_PARENT,  LayoutParams.WRAP_CONTENT);
        maalContainer.removeAllViews();

        maalText = new EditText[numberofPlayersTolayout];
        points = new EditText[numberofPlayersTolayout];
        result = new TextView[numberofPlayersTolayout];
        for (int i = 0; i < numberofPlayersTolayout; i++) {
            View dynamicEntryView = inflater.inflate(R.layout.player_entry_item, null);
            maalContainer.addView(dynamicEntryView, params);
            TextView playerName = (TextView) dynamicEntryView.findViewById(R.id.player_name_textview);
            playerName.setText("Player :" + (i + 1));

            maalText[i] = (EditText) dynamicEntryView.findViewById(R.id.player_item_edittext_maal);
            points[i] = (EditText) dynamicEntryView.findViewById(R.id.player_item_edittext_point);
            result[i] = (TextView) dynamicEntryView.findViewById(R.id.player_item_textview_result);
}

Answer 5

您可以使用 View 的 getId() 和 setId() 方法来做到这一点。

   dynamicEntryView.setId(i);

并通过获取

来访问如下视图

   dynamicEntryView.getId(i);

Answer 6

<?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="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/player_name_textview"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="10sp"
        android:layout_marginTop="10sp"
        android:text="Player name"
        android:textColor="#202020"
        android:textSize="18sp" />

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="horizontal" >

        <EditText
            android:id="@+id/player_item_edittext_point"
            android:layout_width="0sp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:hint="Points"
            android:inputType="number"
            android:textColor="#202020" />

        <EditText
            android:id="@+id/player_item_edittext_maal"
            android:layout_width="0sp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:hint="Maal"
            android:inputType="number"
            android:textColor="#202020" />

        <TextView
            android:id="@+id/player_item_textview_result"
            android:layout_width="0sp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:gravity="center"
            android:text="0.00$"
            android:textSize="22sp"
            android:typeface="serif" />
    </LinearLayout>

</LinearLayout>

只使用一个 id。它将根据玩家数量循环播放。希望它会帮助你。 @user2731584