Android单击显示contextMenu

onCreateContextMenu是view的上下文菜单，这在上一篇中《Android中的2种Menu：OptionsMenu、ContextMenu》已经讲过

一般都是长按跳出onCreateContextMenu，但有时需要单击跳出onCreateContextMenu。比如替换Dialog等

//绑定onCreateContextMenubtn_one = (Button) findViewById(R.id.btn_one);btn_one.setOnCreateContextMenuListener(this);btn_one.setOnClickListener(onclick_one);//单击显示ContextMenuprivate View.OnClickListener onclick_one = new View.OnClickListener() {    @Override    public void onClick(View v) {        v.showContextMenu();    }};//创建onCreateContextMenu@Overridepublic void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {        getMenuInflater().inflate(R.menu.menu_main, menu);        super.onCreateContextMenu(menu, v, menuInfo);}//onCreateContextMenu选项事件@Overridepublic boolean onContextItemSelected(MenuItem item) {    int id = item.getItemId();    switch (id) {        case R.id.action_settings:            break;        case R.id.action_add:            break;    }    return super.onContextItemSelected(item);}

menu_main.xml放在res的menu目录下。没有自己新建一个目录

 xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    tools:context=".MainActivity">            android:id="@+id/action_settings"        android:orderInCategory="100"        android:showAsAction="never"        android:title="@string/action_settings" />            android:id="@+id/action_add"        android:orderInCategory="100"        android:showAsAction="never"        android:title="@string/action_add" />

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