Android自定义dialog弹窗

主要实现过程就是自定义一个layout布局文件，然后通过LayoutInflater将自定义的布局文件填充进自定义的dialog里。

1.layout布局

2.自定义的dialog代码

    //自定义AlertDialog弹窗修改url和port
    private void change() {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        View contentView = LayoutInflater.from(this).inflate(R.layout.dialog, null);
        final AlertDialog myDialog = builder.create();
        myDialog.setView(contentView);
        myDialog.show();
        myDialog.setTitle("修改");
        //是否可取消对话框显示
        myDialog.setCanceledOnTouchOutside(true);
        //通过contentView来找到自定义的控件
        final EditText changeUrl = contentView.findViewById(R.id.changeUrl);
        final EditText changePort = contentView.findViewById(R.id.changePort);
        Button ok = contentView.findViewById(R.id.ok);
        Button cancel = contentView.findViewById(R.id.cancel);
        changeUrl.setText(url);
        changePort.setText(port);
        //点击确定按钮后执行的逻辑
        ok.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                url = changeUrl.getText().toString();
                port = changePort.getText().toString();
                if (url.equals("") && port.equals("")) {
                    Toast.makeText(MainActivity.this, "输入不能为空", Toast.LENGTH_SHORT).show();
                } else {
                    Toast.makeText(MainActivity.this, "url修改为了  " + url + "  port修改为了  " + port, Toast.LENGTH_SHORT).show();
                    //数据持久化
                    preferences.edit().putString("url", url).putString("port", port).apply();
                    //修改完ip或port后断开原tcp,开启新tcp
                    myTcpClient.close();
                    myTcpClient = new My_TCPClient(url, Integer.parseInt(port), listener);
                    myTcpClient.start();
                    myTcpClient.send("1");
                }
                myDialog.dismiss();
            }
        });
        //点击取消按钮后的逻辑，直接dismiss对话框
        cancel.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                myDialog.dismiss();
            }
        });
    }