我有ExpandableListView
OnChildClickListener
,但如何点击TextView
时如何添加删除线?
mExpandableList.setOnChildClickListener(new OnChildClickListener(){
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
Toast.makeText(getApplicationContext(),
"Group: " + groupPosition + " Child: " + childPosition, Toast.LENGTH_SHORT).show();
//Do something (i.e. add strikethourgh) to the TextView clicked..
return false;
}
});
我的活动布局文件是
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
>
<TextView
android:id="@+id/calc_text"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
<ExpandableListView
android:id="@+id/calc_expandable_list"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:cacheColorHint="#00000000"
android:listSelector="@android:color/transparent"
android:transcriptMode="alwaysScroll" />
</LinearLayout>
而ExpandableList的子项是
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/list_item_child"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center_vertical"
android:orientation="horizontal" >
<TextView
android:id="@+id/list_item_text_child"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="5dp"
android:padding="10dp"
android:textSize="20sp" />
</LinearLayout>
LogCat的错误是:
W/dalvikvm(28424): threadid=1: thread exiting with uncaught exception (group=0x4001d5a0) E/AndroidRuntime(28424): FATAL EXCEPTION: main
E/AndroidRuntime(28424): java.lang.ClassCastException: android.widget.LinearLayout E/AndroidRuntime(28424): at com.test.skylderhverandre.Calc$1.onChildClick(Calc.java:185)
E/AndroidRuntime(28424): at
android.widget.ExpandableListView.handleItemClick(ExpandableListView.java:588)
E/AndroidRuntime(28424): at
android.widget.ExpandableListView.performItemClick(ExpandableListView.java:527)
E/AndroidRuntime(28424): at
android.widget.AbsListView$PerformClick.run(AbsListView.java:1831)
E/AndroidRuntime(28424): at
android.os.Handler.handleCallback(Handler.java:587)
E/AndroidRuntime(28424): at
android.os.Handler.dispatchMessage(Handler.java:92)
E/AndroidRuntime(28424): at android.os.Looper.loop(Looper.java:150)
E/AndroidRuntime(28424): at
android.app.ActivityThread.main(ActivityThread.java:4385)
E/AndroidRuntime(28424): at
java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime(28424): at
java.lang.reflect.Method.invoke(Method.java:507)
E/AndroidRuntime(28424): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849)
E/AndroidRuntime(28424): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:607)
E/AndroidRuntime(28424): at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分:0)
您必须使用SpannableString,如下所示:
CharSequence value = ((TextView)((LinearLayout)v).getChildAt(0)).getText();
if(value!=null){
SpannableString spannableString = new SpannableString(value);
spannableString.setSpan(new StrikethroughSpan(), 0, value.length(), 0);
((TextView)((LinearLayout)v).getChildAt(0)).setText(spannableString);
}