android - 使用 View 多次充气

Question

我在膨胀和重新使用同一个 TextView 方面遇到了一些问题。
就像它试图一遍又一遍地覆盖相同的 TextView 之类的，但它不能那样做？

LayoutInflater inflater = LayoutInflater.from(this);
View mainlayout = inflater.inflate(R.layout.days_monday_inflate, null);
View layout_number = inflater.inflate(R.layout.inflate_number, null);

for (int i = 0; i < 10; i++) {
    row = new TableRow(this);
    number = (TextView) layout_number.findViewById(R.id.Number);
    number.setTag(i);
    number.setText(Integer.toString(i));
    row.addView(number);
}
setContentView(mainlayout);

这是 inflate_number.xml

<TextView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/Number"
    android:layout_width="3dp"
    android:layout_height="wrap_content"
    android:layout_gravity="center|bottom"
    android:text="1" />

这是我收到的错误，它位于第 51 行，即: row.addView(number);



<p><code></code></p><code>

</code><pre><code>07-18 20:54:25.124: E/AndroidRuntime(1166): Caused by: java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first.
07-18 20:54:25.124: E/AndroidRuntime(1166): at android.view.ViewGroup.addViewInner(ViewGroup.java:1970)
07-18 20:54:25.124: E/AndroidRuntime(1166): at android.view.ViewGroup.addView(ViewGroup.java:1865)
07-18 20:54:25.124: E/AndroidRuntime(1166): at android.view.ViewGroup.addView(ViewGroup.java:1822)
07-18 20:54:25.124: E/AndroidRuntime(1166): at android.view.ViewGroup.addView(ViewGroup.java:1802)
07-18 20:54:25.124: E/AndroidRuntime(1166): at com.trainingschedule.days.Monday.onCreate(Monday.java:50)
07-18 20:54:25.124: E/AndroidRuntime(1166): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
07-18 20:54:25.124: E/AndroidRuntime(1166): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
</code></pre>



Answer 1

您实际上从未向您的 Activity 添加任何 View 。您正在创建新的 TableRows 并将 TextViews 添加到它们，但您永远不会将行添加到任何东西。假设您在 R.layout.days_monday_inflate 中有一个 TableLayout，您应该首先获取对该 View 的引用 (TableLayout layout = (TableLayout)mainLayout.findViewById(R.id.my_table_layout_id))，然后将每一行添加到该 TableLayout:

TableLayout layout = (TableLayout)mainLayout.findViewById(R.id.my_table_layout_id);

for(int i = 0; i < 10; i++) {
    row = new TableRow(this);
    View layout_number = inflater.inflate(R.layout.inflate_number, layout, false);
    TextView number = (TextView) layout_number.findViewById(R.id.Number);
    number.setTag(i);
    number.setText(Integer.toString(i));
    row.addView(number);
    layout.addView(row);
}

尽管我建议尽可能使用 XML 完全设置您的布局，除非动态需要。另外，如果您每行只添加一个 TextView，我建议您最好只使用 LinearLayout。