使用视图多次充气

Question

我有一些关于膨胀和重新使用相同TextView的问题.
它就像试图一遍又一遍地覆盖相同的文本视图一样,它不能这样做？

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" />

这是我得到的错误和它的行:51,这是: row.addView(number);

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)

Answer 1

您实际上从未向您的活动添加任何视图.您正在创建新的TableRows并向其添加TextView,但您永远不会将行添加到任何内容.假设您有一个TableLayout R.layout.days_monday_inflate,您应首先获得对该视图的引用(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);
}

虽然我建议尽可能使用XML完全设置布局,除非动态需要.另外,如果你每行只添加一个TextView,我建议你最好只使用一个LinearLayout.