如何使LinearLayout可点击

时间:2014-04-15 18:26:28

标签: android android-layout android-listview

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

当我将 自定义视图 放在 OnLongTouch 无效> 活动 ,我的 自定义视图 似乎 无法点击

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);
    }

}

虚增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>

MainActivity:

<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>

4 个答案:

答案 0 :(得分:1)

尝试并失败了几百次后,我找到了解决问题的方法!

而不是:

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;
        }
    });

我不应该使用android:clickableandroid:longClickable来扩充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" >

最后,问题解决了......

答案 1 :(得分:0)

问题是你的布局根本没有填满屏幕,因为你使用的是wrap_content而没有内容:

将布局切换为

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

答案 2 :(得分:0)

我正在回答标题问题,您可以使用xml和代码的两个选项:

放入xml:

android:clickable="true"

或者在.java中

 yourLinearLayout.setClickable(true);

答案 3 :(得分:0)

XML文件中的

layout.setclickble="true"

layout.setOnLongClickListener(new View.OnLongClickListener() {
    @Override
    public boolean onLongClick(View arg0) {
        // TODO Auto-generated method stub     
    }
});