Android仿微信頂部titlebar，點擊加號彈出的PopupWindow，是封裝好的PopupWindow，直接拿來用即可，先看效果圖：

調用代碼非常簡單，這是MainActivity的代碼：

public class MainActivity extends AppCompatActivity {
    private TitlePopup titlePopup;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initPopWindow();
        findViewById(R.id.bt_start).setOnClickListener(
 
new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                titlePopup.show(v);
            }
        });
    }
    private void initPopWindow() {
        // 實例化標題欄彈窗
        titlePopup = new TitlePopup(this, ViewGroup.LayoutParams.WRAP_CONTENT,
                ViewGroup.LayoutParams.WRAP_CONTENT);
        titlePopup.setItemOnClickListener(onitemClick);
        
 
// 給標題欄彈窗添加子類
        titlePopup.addAction(new ActionItem(this, R.string.menu_groupchat,
                R.drawable.icon_menu_group));
        titlePopup.addAction(new ActionItem(this, R.string.menu_addfriend,
                R.drawable.icon_menu_addfriend));
        titlePopup.addAction(new ActionItem(this
 
, R.string.menu_qrcode,
                R.drawable.icon_menu_sao));
        titlePopup.addAction(new ActionItem(this, R.string.menu_money,
                R.drawable.abv));
    }

    private TitlePopup.OnItemOnClickListener onitemClick = new TitlePopup.OnItemOnClickListener() {

        @Override
        public void onItemClick(ActionItem item, int position) {
            // mLoadingDialog.show();
            switch (position) {
                case 0:// 發起群聊
                    Toast.makeText(getApplicationContext(), "發起群聊", Toast.LENGTH_SHORT).show();
                    break;
                case 1:// 添加朋友
                    Toast.makeText(getApplicationContext(), "添加朋友", Toast.LENGTH_SHORT).show();
                    break;
                case 2:// 掃一掃
                    Toast.makeText(getApplicationContext(), "掃一掃", Toast.LENGTH_SHORT).show();
                    break;
                case 3:// 收錢
                    Toast.makeText(getApplicationContext(), "收錢", Toast.LENGTH_SHORT).show();
                    break;
                default:
                    break;
            }
        }
    };
}

剩余封裝好的工具類不貼了，還有圖片啊，顏色啊資源文件，我把demo上傳到了CSDN資源下載，下載地址請點擊：
PopupWindow示例

Android封裝類似微信的頂部TitleBar彈出的PopupWindow代碼