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Menu,SubMenu,popupMenu,contextMenu的xml用法

2024-07-13 15:43:50   222人阅读

在android3.0中引入了menu菜单，通过menu的xml文件，我们能迅速新建生成一个菜单文件，接下来一一介绍几种常用的菜单。

1.menu的调用，重写两个方法即可实现

    @Override    public boolean onCreateOptionsMenu(Menu menu) {        // TODO Auto-generated method stub        getMenuInflater().inflate(R.menu.main, menu);//填充menu文件夹中的main.xml菜单layout        return super.onCreateOptionsMenu(menu);    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {//对菜单的子项实现监控        // TODO Auto-generated method stub        switch (item.getItemId()) {        case R.id.add:            Toast.makeText(MainActivity.this, "add", Toast.LENGTH_SHORT).show();            break;        case R.id.edit:            Toast.makeText(MainActivity.this, "edit", Toast.LENGTH_SHORT)                    .show();            break;        case R.id.del:            Toast.makeText(MainActivity.this, "del", Toast.LENGTH_SHORT).show();            break;        }        return super.onOptionsItemSelected(item);    }

2.subMenu的用法，请看代码和注释

    @Override    public boolean onMenuItemSelected(int featureId, MenuItem item) {//重写onMenuItemSelected即可实现子选项的点击事件监控，本人在实验过程中，发现改变主题会使子选项失效        // TODO Auto-generated method stub        switch (item.getItemId()) {        case R.id.addall:            Toast.makeText(MainActivity.this, "addall", Toast.LENGTH_SHORT)                    .show();            break;        case R.id.addsomeone:            Toast.makeText(MainActivity.this, "addsomeone", Toast.LENGTH_SHORT)                    .show();            break;        }        return super.onMenuItemSelected(featureId, item);    }

 

3.popMenu的用法

  在menu的xml中声明；

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="${packageName}.${activityClass}" ><!-- 在button中设置触发时的方法体 -->    <Button        android:id="@+id/button1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentTop="true"        android:layout_marginLeft="22dp"        android:layout_marginTop="45dp"        android:onClick="showpopMenu"        android:text="弹出菜单" />    <ListView        android:id="@+id/listView1"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_alignParentLeft="true"        android:layout_below="@+id/button1" >    </ListView></RelativeLayout>

在activity中实现方法体，即可实现弹窗效果

    public void showpopMenu(View view) {        PopupMenu popupMenu = new PopupMenu(context, view);        popupMenu.getMenuInflater().inflate(R.menu.menu1, popupMenu.getMenu());        popupMenu.show();    }

3.contextMenu，重写两个方法，即可实现contextMenu效果

public class MainActivity extends Activity implements OnItemLongClickListener {    private ListView lv;    private ArrayAdapter<String> mArrayAdapter;    public Context context = MainActivity.this;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        init();        lv.setAdapter(mArrayAdapter);        registerForContextMenu(lv);    }    void init() {        lv = (ListView) findViewById(R.id.listView1);        mArrayAdapter = new ArrayAdapter<String>(context,                android.R.layout.simple_list_item_1, getData());    }    public void showpopMenu(View view) {        PopupMenu popupMenu = new PopupMenu(context, view);        popupMenu.getMenuInflater().inflate(R.menu.menu1, popupMenu.getMenu());        popupMenu.show();    }    List<String> getData() {        List<String> mlist = new ArrayList<String>();        for (int i = 0; i < 10; i++) {            mlist.add("minfan" + i);        }        return mlist;    }        @Override    public boolean onContextItemSelected(MenuItem item) {        // TODO Auto-generated method stub        AdapterContextMenuInfo info = (AdapterContextMenuInfo) item                .getMenuInfo();        String value = mArrayAdapter.getItem(info.position);//value值表示的是listview中的item的信息，用于定位        switch (item.getItemId()) {        case R.id.item1:            Toast.makeText(context, "item1" + value, Toast.LENGTH_SHORT).show();            break;        case R.id.item2:            Toast.makeText(context, "item2" + value, Toast.LENGTH_SHORT).show();            break;        case R.id.item3:            Toast.makeText(context, "item3" + value, Toast.LENGTH_SHORT).show();            break;        }        return super.onContextItemSelected(item);    }    @Override    public void onCreateContextMenu(android.view.ContextMenu menu, View v,            android.view.ContextMenu.ContextMenuInfo menuInfo) {        getMenuInflater().inflate(R.menu.menu1, menu);    };}


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