Android:动作栏项目onclick [英] Android: Actionbar item onclick
问题描述
1-将搜索项添加到我的 actionbar 我以这种方式拥有该物品:
1-To add a search item to my actionbar i have the item in this way:
<item
android:id="@+id/search"
android:icon="@drawable/ic_action_search"
android:title="@string/Search"
android:showAsAction="ifRoom"
/>
//onCreateOptionsMenu
//onCreateOptionsMenu
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
getMenuInflater().inflate(R.menu.main, menu);
MenuInflater inflater=getMenuInflater();
inflater.inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
//OnOptionItemSelected
//OnOptionItemSelected
public boolean OnOptionItemSelected(MenuItem item)
{
switch(item.getItemId())
{
case R.id.search:
action_search();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
//Search_Action
//Search_Action
public void action_search()
{
System.out.println("Heeeeey");
}
,但是如果我添加这个android:onClick="action_search"
,它会给我这些错误
,but if i add this one android:onClick="action_search"
it gives me these errors
03-20 07:40:12.622: E/Trace(1277): error opening trace file: No such file or directory (2)
03-20 07:40:13.002: E/AndroidRuntime(1277): FATAL EXCEPTION: main
03-20 07:40:13.002: E/AndroidRuntime(1277): android.view.InflateException: Couldn't resolve menu item onClick handler action_search in class com.example.lesson1.MainActivity
03-20 07:40:13.002: E/AndroidRuntime(1277): at android.view.MenuInflater$InflatedOnMenuItemClickListener.<init>(MenuInflater.java:217)
03-20 07:40:13.002: E/AndroidRuntime(1277): at android.view.MenuInflater$MenuState.setItem(MenuInflater.java:417)
03-20 07:40:13.002: E/AndroidRuntime(1277): at android.view.MenuInflater$MenuState.addItem(MenuInflater.java:451)
03-20 07:40:13.002: E/AndroidRuntime(1277): at android.view.MenuInflater.parseMenu(MenuInflater.java:188)
03-20 07:40:13.002: E/AndroidRuntime(1277): at android.view.MenuInflater.inflate(MenuInflater.java:110)
03-20 07:40:13.002: E/AndroidRuntime(1277): at com.example.lesson1.MainActivity.onCreateOptionsMenu(MainActivity.java:30)
03-20 07:40:13.002: E/AndroidRuntime(1277): at android.app.Activity.onCreatePanelMenu(Activity.java:2476)
03-20 07:40:13.002: E/AndroidRuntime(1277): at com.android.internal.policy.impl.PhoneWindow.preparePanel(PhoneWindow.java:393)
03-20 07:40:13.002: E/AndroidRuntime(1277): at com.android.internal.policy.impl.PhoneWindow.invalidatePanelMenu(PhoneWindow.java:747)
03-20 07:40:13.002: E/AndroidRuntime(1277): at com.android.internal.policy.impl.PhoneWindow$1.run(PhoneWindow.java:2913)
03-20 07:40:13.002: E/AndroidRuntime(1277): at android.os.Handler.handleCallback(Handler.java:615)
03-20 07:40:13.002: E/AndroidRuntime(1277): at android.os.Handler.dispatchMessage(Handler.java:92)
03-20 07:40:13.002: E/AndroidRuntime(1277): at android.os.Looper.loop(Looper.java:137)
03-20 07:40:13.002: E/AndroidRuntime(1277): at android.app.ActivityThread.main(ActivityThread.java:4745)
03-20 07:40:13.002: E/AndroidRuntime(1277): at java.lang.reflect.Method.invokeNative(Native Method)
03-20 07:40:13.002: E/AndroidRuntime(1277): at java.lang.reflect.Method.invoke(Method.java:511)
03-20 07:40:13.002: E/AndroidRuntime(1277): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
03-20 07:40:13.002: E/AndroidRuntime(1277): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
03-20 07:40:13.002: E/AndroidRuntime(1277): at dalvik.system.NativeStart.main(Native Method)
03-20 07:40:13.002: E/AndroidRuntime(1277): Caused by: java.lang.NoSuchMethodException: action_search [interface android.view.MenuItem]
03-20 07:40:13.002: E/AndroidRuntime(1277): at java.lang.Class.getConstructorOrMethod(Class.java:460)
03-20 07:40:13.002: E/AndroidRuntime(1277): at java.lang.Class.getMethod(Class.java:915)
03-20 07:40:13.002: E/AndroidRuntime(1277): at android.view.MenuInflater$InflatedOnMenuItemClickListener.<init>(MenuInflater.java:215)
03-20 07:40:13.002: E/AndroidRuntime(1277): ... 18 more
2-什么是android:showAsAction="ifRoom"
?到底在做什么
2-What is android:showAsAction="ifRoom"
? What is it doing?
推荐答案
1..您不应以这种方式将onClicks添加到ActionMenu项中.相反,您必须像这样覆盖onOptionsItemSelected
:
1. You shouldn't add onClicks to ActionMenu items that way. Instead, you have to override onOptionsItemSelected
like so:
@Override
public boolean onOptionsItemSelected(MenuItem item){
switch(item.getItemId()){
case R.id.search:
// your action goes here
return true;
default:
return super.onOptionsItemSelected(item);
}
}
并按如下所示将您的布局添加到ActionBar中:
And inflate your layout into the ActionBar as the following:
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.mymenu, menu);
return true;
}
2..ifRoom
表示如果有空间,则将操作项放在操作栏上.但是,空间是由以下因素决定的:小于动作栏水平空间宽度的一半,并且计数小于动作项的最大数量-杰克·沃顿.
2. ifRoom
means place the action item on the action bar if there is space. However, space is determined by the following: less than half the width of the action bar horizontal space and the count is less than the max number of action items - Jake Wharton.
请在此处查看有关android ActionBar的更多信息
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