我正在动态添加一个没有出现的 TextView，这似乎是什么问题？
以下两行之间是否有区别：
receiptLayout.addView(order_1_confirm);
((LinearLayout) receiptLayout).addView(order_1_confirm);
好吧，它们中的任何一个都不起作用！
我的activity_receipt.xml：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/receiptMainLinearLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<ImageView
android:id="@+id/image_view_rsc_logo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:contentDescription="@string/rsc_logo"
android:src="@drawable/rsc" />
和我的 ReceiptActivity.java：
public class ReceiptActivity extends Activity{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_receipt);
LinearLayout receiptLayout = (LinearLayout)findViewById(R.id.receiptMainLinearLayout);
TextView order_1_confirm = new TextView(this);
order_1_confirm.setText("hello");
//receiptLayout.addView(order_1_confirm);
((LinearLayout) receiptLayout).addView(order_1_confirm);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}