当以编程方式添加edittext时，LinearLayout不会展开

Question

所以我试图以编程方式将EditText添加到LinearLayout。我已经添加了一个"+"ImageButton，点击它，我将添加一个EditText，直到有五个。下面是我的XML文件的一个片段。

<LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="@dimen/margin_16"
            android:orientation="horizontal">
            <LinearLayout
                android:id="@+id/container"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:orientation="vertical">

            </LinearLayout>
            <ImageButton
                android:id="@+id/add_field"
                android:layout_width="40dp"
                android:layout_height="40dp"
                android:layout_marginBottom="@dimen/margin_16"
                android:background="@drawable/cyan_top_rounded"
                android:src="@drawable/add" />
        </LinearLayout>

id为"Container"的LinearLayout将具有EditText作为子。下面是我添加EditText的代码。

  mAddField.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (count < 5) {
                mAddField.setEnabled(true);
                mContainer.addView(getTextField());
                count++;
            } else {
                mAddField.setEnabled(false);
            }
        }
    });
private EditText getTextField() {
    EditText et = new EditText(this);
    LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
    et.setLayoutParams(params);
    et.setText("abcd");
    return et;
}
 private void initUI() {
    mAddField = (ImageButton) findViewById(R.id.add_field);
    mContainer = (LinearLayout) findViewById(R.id.container);
    EditText et = new EditText(this);
    LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
    et.setLayoutParams(params);
    et.setText("abcd");
    mContainer.addView(et);
}

然而，当我点击ImageButton时，什么也没发生。如果添加了EditText, LinearLayout也不会展开。请帮助。

Answer 1

试试这个:

...
            <LinearLayout
                android:id="@+id/container"
                android:layout_width="0dp"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:orientation="vertical">

            </LinearLayout>
...

Answer 2

Change ur layout to this it will work fine:(Make the necessary changes according to ur own). Problem is with the height and width of the outer as well as the inner LinearLayout.
<LinearLayout android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    xmlns:android="http://schemas.android.com/apk/res/android">
    <LinearLayout
        android:id="@+id/container"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:orientation="vertical">
    </LinearLayout>
    <ImageButton
        android:id="@+id/add_field"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:src="@drawable/image" />
</LinearLayout>

Answer 3

要动态添加Edittext的视图，必须将其宽度和高度设置为"wrap_content"。所以把你的内部布局改成:

 <LinearLayout
                android:id="@+id/container"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_weight="1"
                android:orientation="vertical">

我想这会对你有帮助。