其实原理就是WindowManager Dialog 和Animation的组合

这里分享一个Android的非常经典实用而且简单方便的第三方UI控件库：BottomView（小米的米UI也用到了这个）

实现功能：

可以在底部弹出的View里自定义布局；

可以自定义是否可以触摸外部消失；

可以自定义事件；

可以自定义外围背景是否透明；

可以自定义动画；

如果需要的话，可以强制为顶部View显示

用法：

1、下载BottomView.jar库文件，放到Android项目工程里的libs里

2、设置BottomView的Theme：

这2个Theme复制粘贴到你的项目的res/values/styles.xml里即可

另外View的动画Theme可选，建议也复制进去，效果好一些，代码如下：

2、部分核心使用代码：

如果想获取这个View的话，调用.getView()方法即可。

以下是源代码“：

package com.tandong.bottomview;

import java.util.ArrayList;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.ListView;

import com.tandong.bottomview.adapter.BVAdapter;
import com.tandong.bottomview.view.BottomView;

/**
 * BottomView
 * 
 * www.aplesson.com
 * 
 * @author TanDong
 * 
 */

public class MainActivity extends Activity implements OnClickListener {
	private Button btn_show;
	private ListView lv_menu_list;
	private ArrayList<String> menus;
	private BottomView bottomView;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		initView();
		initData();

	}

	private void initData() {
		menus = new ArrayList<String>();
		menus.add(getResources().getString(R.string.menu_search));
		menus.add(getResources().getString(R.string.menu_filemanage));
		menus.add(getResources().getString(R.string.menu_downloadmanage));
		menus.add(getResources().getString(R.string.menu_setting));
		menus.add(getResources().getString(R.string.menu_about));

	}

	private void initView() {
		btn_show = (Button) this.findViewById(R.id.btn_show);
		btn_show.setOnClickListener(this);
	}

	@Override
	public void onClick(View arg0) {
		switch (arg0.getId()) {
		case R.id.btn_show:
			bottomView = new BottomView(MainActivity.this,
					R.style.BottomViewTheme_Defalut, R.layout.bottom_view);
			bottomView.setAnimation(R.style.BottomToTopAnim);
			
			bottomView.showBottomView(false);
			lv_menu_list = (ListView) bottomView.getView().findViewById(
					R.id.lv_list);
			BVAdapter adapter = new BVAdapter(MainActivity.this, menus);
			lv_menu_list.setAdapter(adapter);
			lv_menu_list.setOnItemClickListener(new OnItemClickListener() {
				@Override
				public void onItemClick(AdapterView<?> arg0, View arg1,
						int arg2, long arg3) {
					bottomView.dismissBottomView();

				}
			});
			break;

		default:
			break;
		}
	}

}

package com.tandong.bottomview.adapter;

import java.util.ArrayList;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import com.tandong.bottomview.R;

/**
 * BottomView
 * 
 * @author TanDong
 * 
 */
public class BVAdapter extends BaseAdapter {
	private Context c;
	private ArrayList<String> alss;

	public BVAdapter(Context context, ArrayList<String> als) {
		this.c = context;
		this.alss = als;
	}

	@Override
	public int getCount() {
		// TODO Auto-generated method stub
		return alss.size();
	}

	@Override
	public Object getItem(int arg0) {
		// TODO Auto-generated method stub
		return alss.get(arg0);
	}

	@Override
	public long getItemId(int arg0) {
		// TODO Auto-generated method stub
		return arg0;
	}

	@Override
	public View getView(int position, View convertView, ViewGroup arg2) {
		convertView = View.inflate(c, R.layout.item, null);
		TextView tv = (TextView) convertView.findViewById(R.id.tv_name);
		tv.setText(alss.get(position));
		return convertView;
	}

}

原理：

package com.tandong.bottomview.view;

import android.app.Dialog;
import android.content.Context;
import android.view.Display;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.view.WindowManager.LayoutParams;

public class BottomView
{
  private View convertView;
  private Context context;
  private int theme;
  private Dialog bv;
  private int animationStyle;
  private boolean isTop = false;

  public BottomView(Context c, int theme, View convertView)
  {
    this.theme = theme;
    this.context = c;
    this.convertView = convertView;
  }

  public BottomView(Context c, int theme, int resource) {
    this.theme = theme;
    this.context = c;
    this.convertView = View.inflate(c, resource, null);
  }

  public void showBottomView(boolean CanceledOnTouchOutside) {
    if (this.theme == 0)
      this.bv = new Dialog(this.context);
    else
      this.bv = new Dialog(this.context, this.theme);

    this.bv.setCanceledOnTouchOutside(CanceledOnTouchOutside);
    this.bv.getWindow().requestFeature(1);
    this.bv.setContentView(this.convertView);
    Window wm = this.bv.getWindow();
    WindowManager m = wm.getWindowManager();
    Display d = m.getDefaultDisplay();
    WindowManager.LayoutParams p = wm.getAttributes();
    p.width = (d.getWidth() * 1);
    if (this.isTop)
      p.gravity = 48;
    else
      p.gravity = 80;

    if (this.animationStyle != 0)
    {
      wm.setWindowAnimations(this.animationStyle);
    }
    wm.setAttributes(p);
    this.bv.show();
  }

  public void setTopIfNecessary() {
    this.isTop = true;
  }

  public void setAnimation(int animationStyle) {
    this.animationStyle = animationStyle;
  }

  public View getView() {
    return this.convertView;
  }

  public void dismissBottomView() {
    if (this.bv != null)
      this.bv.dismiss();
  }
}

【最讨厌那些不开源的】小米的米UI的BOTTOMVIEW源码完美反编译,布布扣,bubuko.com

【最讨厌那些不开源的】小米的米UI的BOTTOMVIEW源码完美反编译