android - 如何使 LinearLayouts 可点击

Question

我有一个继承自 LinearLayout 的布局，我在 MainActivity 上有这个自定义 View 。

我的问题是，当我将此自定义 View 放在 上时，OnLongTouch 将不起作用> Activity ，我的自定义 View 似乎不可点击 !

布局代码:

public class AliLayout extends LinearLayout {

    public AliLayout(Context context, AttributeSet attrs) {
        super(context, attrs);



        if(! isInEditMode()){

            final AliLayout ly2 = this;//(AliLayout)findViewById(R.layout.ali_layout);


            ly2.setOnLongClickListener(new View.OnLongClickListener() {

                @Override
                public boolean onLongClick(View arg0) {
                    // TODO Auto-generated method stub
                    ly2.setTitle("Hello world!");
                    return false;
                }
            });     

        }
    }

    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();
        LayoutInflater.from(this.getContext()).inflate(R.layout.ali_layout,
                this);

    }


    public void setTitle(String txt) {
        TextView tv = (TextView) findViewById(R.id.textView1);
        tv.setText(txt);
    }

}

膨胀的 xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/layout1"
    android:layout_width="200dp"
    android:layout_height="200dp"
    android:layout_alignParentBottom="true"
    android:layout_alignParentLeft="true"
    android:layout_marginBottom="68dp"
    android:layout_marginLeft="40dp"
    android:background="#E0D641"
    android:clickable="true"
    android:longClickable="true"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Large Text"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Large Text"
        android:textAppearance="?android:attr/textAppearanceLarge" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Button" />

</LinearLayout>

主要 Activity :

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:clickable="true"
    android:longClickable="true"
    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" >

    <com.example.component.AliLayout
        android:id="@+id/ali1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_marginTop="22dp" >
    </com.example.component.AliLayout>

</RelativeLayout>

Answer 1

在尝试和失败一百次之后，我找到了解决问题的方法!

代替:

ly2.setOnLongClickListener(new View.OnLongClickListener() {

                @Override
                public boolean onLongClick(View arg0) {
                    // TODO Auto-generated method stub
                    ly2.setTitle("Hello world!");
                    return false;
                }
            }); 

我应该写:

this.setOnLongClickListener(new OnLongClickListener() {

        @Override
        public boolean onLongClick(View arg0) {
            // TODO Auto-generated method stub
            setTitle("Hello World");
            return true;
        }
    });

而且我不应该使用 android:clickable 和 android:longClickable 来扩展 XML(ali_layout.xml):

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/layout1"
    android:layout_width="200dp"
    android:layout_height="200dp"
    android:layout_alignParentBottom="true"
    android:layout_alignParentLeft="true"
    android:layout_marginBottom="68dp"
    android:layout_marginLeft="40dp"
    android:background="#E0D641"
    android:orientation="vertical" >

终于，问题解决了...