Android:在动态 onclicklistener 中创建自定义警报对话框

Question

不确定这个标题描述我希望做的事情的程度如何，但这里是。基本上我有一个应用程序，它实用地创建了一个按钮列表，当点击这些按钮时会返回一个描述。

我创建了以下类

public class DynamicOnClickListener implements OnClickListener
{

    String description;
    public DynamicOnClickListener(String adesc) {
        //sets the description attribute at instantiation
         this.description = adesc;
    }

    public void onClick(View v) {
        //on button click returns dialog box with description in it
        Log.v("DynamicOnClickListener","1");
        AlertDialog.Builder builder = new AlertDialog.Builder(v.getContext());
        builder.setMessage(description);
        builder.setCancelable(false);
        builder.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
                   public void onClick(DialogInterface dialog, int id) 
                   {
                       dialog.cancel();
                   }
               });
        AlertDialog alert = builder.create();   
        alert.show();
    }

 }

这可以完美地工作，但是我非常想使对话框更加生动一些。我一直在网上查看一些示例，根据 android 文档，他们建议定义自定义 xml 布局并使用 LayourInflator 将自定义 xml 设置为对话框的 View 。 (好吧，我就是这么理解的，可能是错误的)

虽然文档示例与我的示例略有不同，但根据他们的示例我应该添加以下行

// Get the layout inflater
LayoutInflater inflater = getActivity().getLayoutInflater();

// Inflate and set the layout for the dialog
// Pass null as the parent view because its going in the dialog layout
builder.setView(inflater.inflate(R.layout.dialog_signin, null))

然而，当我将它添加到我的类时，导致以下结果，我在 getActivity() 上收到错误

public class DynamicOnClickListener implements OnClickListener
{

    String description;
    public DynamicOnClickListener(String adesc) {
        //sets the description attribute at instantiation
         this.description = adesc;
    }

    public void onClick(View v) {
        //on button click returns dialog box with program description in it
        Log.v("DynamicOnClickListener","1");
        AlertDialog.Builder builder = new AlertDialog.Builder(v.getContext());

        // Get the layout inflater
        LayoutInflater inflater = getActivity().getLayoutInflater();

        // Inflate and set the layout for the dialog
        // Pass null as the parent view because its going in the dialog layout
        builder.setView(inflater.inflate(R.layout.description_dialog, null));


        builder.setMessage(description);
        builder.setCancelable(false);
        builder.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
                   public void onClick(DialogInterface dialog, int id) 
                   {
                       dialog.cancel();
                   }
               });
        AlertDialog alert = builder.create();   
        alert.show();
    }

 }

Answer 1

我用一个 EditText 来输入电子邮件和一个按钮来发送数据和取消它。通过使背景变暗来显示此对话框。并将其显示在当前 Activity 之上。

    final Dialog dialog = new Dialog(this);
        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
               LinearLayout popUp = new LinearLayout(this);
               popUp.setBackgroundColor(Color.LTGRAY);
               popUp.setOrientation(1);

                EditText t1 = new  EditText(this);
                t1.setHint("Enter Your Email ID ");
                t1.setTextColor(Color.parseColor("#FFFFFF"));
                t1.setInputType(InputType.TYPE_CLASS_TEXT|InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS);          

                LinearLayout btnLayout = new LinearLayout(this);
                btnLayout.setBackgroundColor(Color.LTGRAY);
                btnLayout.setOrientation(0);
                btnLayout.setGravity(Gravity.CENTER);

                Button send = new  Button(this);
                send.setText("Send");
                send.setTextColor(Color.WHITE);
                Button cancel = new  Button(this);
                cancel.setText("Cancel");
                cancel.setTextColor(Color.WHITE);

                btnLayout.addView(send);
                btnLayout.addView(cancel);
                popUp.addView(t1);
                popUp.addView(btnLayout);

                dialog.setContentView(popUp);
              cancel.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {
                    // TODO Auto-generated method stub
                    dialog.dismiss();
                }
            });
                dialog.show();