这是我的卡片视图活动，其中有三个点，就像在工具栏中一样，我想用菜单溢出它但是收到此错误：
java.lang.IllegalStateException：找不到父或祖先的方法showPopup（View）for android：onClick属性在视图类android.support.v7.widget.AppCompatImageButton上定义，id为'img_menu'
这是XML ：
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.CardView
android:id="@+id/card_view"
android:layout_gravity="center"
android:layout_width="fill_parent"
android:layout_height="80dp"
android:layout_margin="5dp"
card_view:cardCornerRadius="2dp"
card_view:contentPadding="10dp"
android:foreground="?android:attr/selectableItemBackground">
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textStyle="bold"
android:layout_alignParentTop="true"/>
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:layout_below="@+id/textView"/>
<ImageButton
android:id="@+id/img_menu"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/ic_action_navigation_more_vert"
android:layout_alignParentRight="true"
android:layout_marginTop="12dp"
android:onClick="showPopup"/>
</RelativeLayout>
</android.support.v7.widget.CardView>
这是活动：
public class CardViewActivity extends AppCompatActivity {
private RecyclerView mRecyclerView;
private RecyclerView.Adapter mAdapter;
private RecyclerView.LayoutManager mLayoutManager;
private static String LOG_TAG = "CardViewActivity";
ImageButton overflowMenu;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_card_view);
overflowMenu = (ImageButton) findViewById(R.id.img_menu);
mRecyclerView = (RecyclerView) findViewById(R.id.my_recycler_view);
mRecyclerView.setHasFixedSize(true);
mLayoutManager = new LinearLayoutManager(this);
mRecyclerView.setLayoutManager(mLayoutManager);
mAdapter = new MyRecyclerViewAdapter(getDataSet());
mRecyclerView.setAdapter(mAdapter);
if (getSupportActionBar() != null) {
getSupportActionBar().setHomeAsUpIndicator(R.drawable.abc_ic_ab_back_mtrl_am_alpha);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
}
}
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
onBackPressed();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
public void showPopup(View v) {
PopupMenu popup = new PopupMenu(this, v);
MenuInflater inflater = popup.getMenuInflater();
inflater.inflate(R.menu.card_overflow_menu, popup.getMenu());
popup.show();
popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
@Override
public boolean onMenuItemClick(MenuItem item) {
switch (item.getItemId()) {
case R.id.one:
//Or Some other code you want to put here.. This is just an example.
Toast.makeText(getApplicationContext(), " Clicked 1 " + " : " , Toast.LENGTH_LONG).show();
break;
case R.id.two:
Toast.makeText(getApplicationContext(), "Clicked 2 " + " : " , Toast.LENGTH_LONG).show();
break;
default:
break;
}
return true;
}
});
}
/* public void showPopup(View v) {
PopupMenu popup = new PopupMenu(CardViewActivity.this, v);
MenuInflater inflater = popup.getMenuInflater();
inflater.inflate(R.menu.card_overflow_menu,popup.getMenu());
popup.setOnMenuItemClickListener((PopupMenu.OnMenuItemClickListener) {
public boolean onMenuClick (MenuItem item){
}
popup.show();
}}*/
/*public void showMenu(View v) {
PopupMenu popup = new PopupMenu(this, v);
// This activity implements OnMenuItemClickListener
popup.setOnMenuItemClickListener((PopupMenu.OnMenuItemClickListener)
this);
popup.inflate(R.menu.card_overflow_menu);
popup.show();
}*/
@Override
protected void onResume() {
super.onResume();
((MyRecyclerViewAdapter) mAdapter).setOnItemClickListener(new MyRecyclerViewAdapter
.MyClickListener() {
@Override
public void onItemClick(int position, View v) {
Log.i(LOG_TAG, " Clicked on Item " + position);
}
});
}
private ArrayList<DataObject> getDataSet() {
ArrayList results = new ArrayList<DataObject>();
for (int index = 0; index < 20; index++) {
DataObject obj = new DataObject("Test " + index,
"Doc number " + index);
results.add(index, obj);
}
return results;
}
}
LogCat ：
java.lang.IllegalStateException: Could not find method showPopup(View) in a parent or ancestor Context for android:onClick attribute defined on view class android.support.v7.widget.AppCompatImageButton with id 'img_menu'
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.resolveMethod(AppCompatViewInflater.java:325)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:284)
at android.view.View.performClick(View.java:4802)
at android.view.View$PerformClick.run(View.java:20101)
at android.os.Handler.handleCallback(Handler.java:810)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:189)
at android.app.ActivityThread.main(ActivityThread.java:5532)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:950)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:745)
答案 0 :(得分：0)
您正在ImageButton上定义onClick事件，而且您也在其上设置onClickListener。
使用
public void showPopup(View v)
代码或
overflowMenu.setOnClickListener(new View.OnClickListener()
我建议您注释掉overFlowMenu clickListener代码。