微信中MMAlert（半透明底部弹出菜单）的使用介绍

如果大家时常用过微信或者用过iphone，就会发现有种从底部弹出的半透明菜单，这种菜单风格优美并且用户体验良好，先看一下效果。

MMAlert来自微信开放平台的sdk示例，其示例的代码有点乱，我做了删减和整理，只保留了MMAlert这个类的一部分功能，即只保留了实现上述效果的那个函数，因为其他函数比较简单，就是普通的AlertDialog，我觉得大家都懂，所以直接删掉了。

代码介绍

1 .  下面这段代码其实蛮好理解的，本质就是new一个对话框，然后将其放置在底部，为其设置theme和style，theme和style写的蛮好理解的，具体大家可以看源码。数据呈现用的是Listview，为此我们需要new一个BaseAdapter对象来管理数据，BaseAdapter没什么特殊之处，很好理解，具体请看代码。

/** * @param context *            Context. * @param title *            The title of this AlertDialog can be null . * @param items *            button name list. * @param alertDo *            methods call Id:Button + cancel_Button. * @param exit *            Name can be null.It will be Red Color * @return A AlertDialog */public static Dialog showAlert(final Context context, final String title, final String[] items, String exit, final OnAlertSelectId alertDo, OnCancelListener cancelListener){String cancel = context.getString(R.string.app_cancel);final Dialog dlg = new Dialog(context, R.style.MMTheme_DataSheet);LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);LinearLayout layout = (LinearLayout) inflater.inflate(R.layout.alert_dialog_menu_layout, null);final int cFullFillWidth = 10000;layout.setMinimumWidth(cFullFillWidth);final ListView list = (ListView) layout.findViewById(R.id.content_list);AlertAdapter adapter = new AlertAdapter(context, title, items, exit, cancel);list.setAdapter(adapter);list.setDividerHeight(0);list.setOnItemClickListener(new OnItemClickListener(){@Overridepublic void onItemClick(AdapterView<?> parent, View view, int position, long id){if (!(title == null || title.equals("")) && position - 1 >= 0){alertDo.onClick(position - 1);dlg.dismiss();list.requestFocus();}else{alertDo.onClick(position);dlg.dismiss();list.requestFocus();}}});// set a large value put it in bottomWindow w = dlg.getWindow();WindowManager.LayoutParams lp = w.getAttributes();lp.x = 0;final int cMakeBottom = -1000;lp.y = cMakeBottom;lp.gravity = Gravity.BOTTOM;dlg.onWindowAttributesChanged(lp);dlg.setCanceledOnTouchOutside(true);if (cancelListener != null)dlg.setOnCancelListener(cancelListener);dlg.setContentView(layout);dlg.show();return dlg;}

2.  如何使用MMAlert？很简单！

findViewById(R.id.send_img).setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {MMAlert.showAlert(SendToWXActivity.this, getString(R.string.send_img), SendToWXActivity.this.getResources().getStringArray(R.array.send_img_item),null, new MMAlert.OnAlertSelectId(){@Overridepublic void onClick(int whichButton) {switch(whichButton){case MMAlertSelect1: {break;}case MMAlertSelect2: {break;}case MMAlertSelect3: {break;}default:break;}}});}});

代码下载

http://download.csdn.net/detail/singwhatiwanna/5338394

或者http://www.kuaipan.cn/file/id_105515054266321788.htm