Question

我正在创建自定义提醒对话框

// Biuld the dialog
AlertDialog.Builder alert = new AlertDialog.Builder(this);

// Create the dialog
AlertDialog alertToShow = alert.create();

// Set keyboard to the dialog
alertToShow.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);

// Add custom layout to the dialog
LayoutInflater inflater = this.getLayoutInflater();
View dialogView = inflater.inflate(R.layout.dialog_view, null);
alert.setView(dialogView);

// Show the dialog
alertToShow.show();

但是从上面我添加自定义布局的下一行

f1.addView(inflater.inflate(R.layout.dialog_view, f1, false));

导致错误

尝试调用虚拟方法＆＃39; void android.widget.FrameLayout.addView（android.view.View）＆＃39;在空对象引用上

知道如何修复错误吗？

Answer 1

您需要在显示对话框后或布局膨胀后找到视图。不是之前

// Add custom layout to the dialog
LayoutInflater inflater = getLayoutInflater();
View dialogView = inflater.inflate(R.layout.dialog_view, f1, false)
FrameLayout f1 = (FrameLayout) dialogView.findViewById(android.R.id.custom);
f1.addView(dialogView);

// Show the dialog
alertToShow.show();

虽然，我认为你想要alertToShow.setView(dialogView)，也许

Answer 2

我必须在创建对话框之前添加视图

    // Add custom layout to the dialog
    LayoutInflater inflater = this.getLayoutInflater();
    View dialogView = inflater.inflate(R.layout.dialog_view, null);
    alert.setView(dialogView);

    // Create the dialog
    AlertDialog alertToShow = alert.create();

    // Set keyboard to the dialog
    alertToShow.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);

    // Show the dialog
    alertToShow.show();

空引用错误将自定义布局添加到警报对话框

2 个答案: