我有一个带有relativelayout标题的列表视图,当我点击relativelayout中的任何空格它变成白色时,我不想要那个白色,如果用户点击空格,什么都不会发生,但如果他点击了将图像转换为相对布局,我可以在onclick上处理它。
这是相对布局
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/rl_simple_list_item_header"
android:focusable="true"
android:orientation="horizontal" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/orderMeal"
android:layout_marginLeft="20dip"
android:id="@+id/tv_restaurant_description_orderMeal"
android:drawableTop="@drawable/order_meal" />
<TextView
android:id="@+id/iv_simple_list_item_header_favorite"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/favorite"
android:layout_alignParentRight="true"
android:layout_marginRight="20dip"
android:drawableTop="@drawable/favorite"/>
</RelativeLayout>
01-25 21:00:42.718: E/AndroidRuntime(24121): FATAL EXCEPTION: main
01-25 21:00:42.718: E/AndroidRuntime(24121): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.Syriatel.EatTel/com.Syriatel.EatTel.Restaurant_Description}: java.lang.NullPointerException
01-25 21:00:42.718: E/AndroidRuntime(24121): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1659)
01-25 21:00:42.718: E/AndroidRuntime(24121): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1675)
01-25 21:00:42.718: E/AndroidRuntime(24121): at android.app.ActivityThread.access$1500(ActivityThread.java:121)
01-25 21:00:42.718: E/AndroidRuntime(24121): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:943)
01-25 21:00:42.718: E/AndroidRuntime(24121): at android.os.Handler.dispatchMessage(Handler.java:99)
01-25 21:00:42.718: E/AndroidRuntime(24121): at android.os.Looper.loop(Looper.java:130)
01-25 21:00:42.718: E/AndroidRuntime(24121): at android.app.ActivityThread.main(ActivityThread.java:3701)
01-25 21:00:42.718: E/AndroidRuntime(24121): at java.lang.reflect.Method.invokeNative(Native Method)
01-25 21:00:42.718: E/AndroidRuntime(24121): at java.lang.reflect.Method.invoke(Method.java:507)
01-25 21:00:42.718: E/AndroidRuntime(24121): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
01-25 21:00:42.718: E/AndroidRuntime(24121): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:624)
01-25 21:00:42.718: E/AndroidRuntime(24121): at dalvik.system.NativeStart.main(Native Method)
01-25 21:00:42.718: E/AndroidRuntime(24121): Caused by: java.lang.NullPointerException
01-25 21:00:42.718: E/AndroidRuntime(24121): at com.Syriatel.EatTel.Restaurant_Description.initialize(Restaurant_Description.java:46)
01-25 21:00:42.718: E/AndroidRuntime(24121): at com.Syriatel.EatTel.Restaurant_Description.onCreate(Restaurant_Description.java:35)
01-25 21:00:42.718: E/AndroidRuntime(24121): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
01-25 21:00:42.718: E/AndroidRuntime(24121): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1623)
01-25 21:00:42.718: E/AndroidRuntime(24121): ... 11 more
答案 0 :(得分:1)
尝试让RelativeLayout
专注:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/rl_simple_list_item_header"
android:orientation="horizontal"
android:focusable="true"
android:focusableInTouchMode="true" >
<强>更新强>
如果您想在标题中点击TextView
,可以这样做:
View header = LayoutInflater.from(this).inflate(R.layout.simple_list_item_header, null);
View favorite = header.findViewById(R.id.iv_simple_list_item_header_favorite);
lv_restaurantInformation = (ListView) findViewById(R.id.lv_restaurant_description_information);
lv_restaurantInformation.addHeaderView(header);
favorite.setOnClickListener(this);
然后在onClick
:
Activity
方法中处理它
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.iv_simple_list_item_header_favorite:
Toast.makeText(this, "onClick", Toast.LENGTH_SHORT).show();
break;
default:
break;
}
}
答案 1 :(得分:1)
如果你将onclicklistener分配给实际的项目,而不是在活动中实现它,这应该不是问题。
tv_favorite = (TextView) header.findViewById(R.id.iv_simple_list_item_header_favorite);
tv_favorite.setOnClickListener( new OnClickListener(){
@Override
public void onClick(View v) {
tv_favorite.setText("asdfasdfasdf");
}
});
如果你想要ListView中的单个项目(而不是标题),你应该使用为整个ListView设置的OnItemClickListener。
答案 2 :(得分:1)
设置布局可点击,没有任何onClickListener
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/info1"
android:clickable="true">