Android: 设置警告对话框中编辑文本的边距

Question

我正在尝试创建一个 Alert Dialog 框，如 Lollipop，一切正常，但我被困在一个部分共 EditText

我想要 EditText 带下划线和 左右边距 带 20dp.For 下划线我试过 setBackground() ，它工作正常。

但是有一个问题是setBackground()不会生效API 16级以下.

我试过setMargin

 final EditText input = new EditText(MainActivity.this);
    LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
            LinearLayout.LayoutParams.WRAP_CONTENT,
            LinearLayout.LayoutParams.WRAP_CONTENT);
    lp.setMargins(30,0,30,0);
    input.setLayoutParams(lp);
    input.setGravity(View.TEXT_ALIGNMENT_GRAVITY);
    input.setBackground(getResources().getDrawable(R.drawable.edit_text_line)); 
    builder.setView(input);

但编辑文本时使用全父宽度。

完整代码

  AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setTitle("Message");
    builder.setMessage("Do you want to\n"+""+"exit from app");

    final EditText input = new EditText(MainActivity.this);
    LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
            LinearLayout.LayoutParams.WRAP_CONTENT,
            LinearLayout.LayoutParams.WRAP_CONTENT);
    lp.setMargins(30,0,30,0);
    input.setLayoutParams(lp);
    input.setGravity(View.TEXT_ALIGNMENT_GRAVITY);
    input.setBackground(getResources().getDrawable(R.drawable.edit_text_line)); //call reequires api 16 and above
    builder.setView(input);

    builder.setNegativeButton("No", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
            dialog.cancel();
        }
    });

    builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
        public void onClick(DialogInterface dialog, int which) {
            Toast.makeText(MainActivity.this, "You exit from app " + input.getText().toString(),
                    Toast.LENGTH_LONG).show();

        }
    });

    AlertDialog alert = builder.create();
    alert.show();
    Button nbutton = alert.getButton(DialogInterface.BUTTON_NEGATIVE);
    nbutton.setTextColor(Color.parseColor("#7e7e7e"));
    Button pbutton = alert.getButton(DialogInterface.BUTTON_POSITIVE);
    pbutton.setTextColor(Color.parseColor("#109c8f"));

有什么方法可以为低于 API 16 和 [=27= 的 EditText 设置 background ]setMargin左右为EditText.

Answer 1

使用此代码对我有用。

     final EditText input = new EditText(MainActivity.this);
     input.setSingleLine();
     FrameLayout container = new FrameLayout(thisActivity);
     FrameLayout.LayoutParams params = new  FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);

     params.topMargin = convertDpToPx(30);
     params.bottomMargin = convertDpToPx(30);

     input.setLayoutParams(params);
     container.addView(input);

Answer 2

根视图的边距不起作用。尝试按照其他答案中的说明向父布局添加填充。
但与其在 java 中创建对话框布局，我建议您膨胀 xml 并使用 AppCompatEditText 如果您想使用线条背景
这是给你的示例代码

AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Message");
// Why are you setting message here when you are inflating custom view?
// You need to add another TextView in xml if you want to set message here
// Otherwise the message will not be shown
// builder.setMessage("Do you want to\n"+""+"exit from app");
View view = LayoutInflater.from(this).inflate(R.layout.dialog_layout, null);
final AppCompatEditText input = (AppCompatEditText) view.findViewById(R.id.editText);
builder.setView(view);
builder.setNegativeButton("No", new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface dialog, int which) {
        dialog.cancel();
    }
});

builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface dialog, int which) {
        Toast.makeText(MainActivity.this, "You exit from app " + input.getText().toString(),
                Toast.LENGTH_LONG).show();

    }
});

AlertDialog alert = builder.create();
alert.show();

最后，您无法在创建对话框后立即获得按钮。如果您想自定义按钮文本颜色，您需要在 OnShowListener 中执行此操作。或者使用 android.support.v7.app.AlertDialog 用于较新的对话框设计。

Button nbutton = alert.getButton(DialogInterface.BUTTON_NEGATIVE);
// will be null
// nbutton.setTextColor(Color.parseColor("#7e7e7e"));
Button pbutton = alert.getButton(DialogInterface.BUTTON_POSITIVE);
// will be null
// pbutton.setTextColor(Color.parseColor("#109c8f"));

dialog_layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              xmlns:app="http://schemas.android.com/apk/res-auto"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:orientation="vertical">

    <android.support.v7.widget.AppCompatEditText
        android:id="@+id/editText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:layout_margin="16dp"
        app:backgroundTint="@color/colorPrimary"/>

</LinearLayout>

Answer 3

希望对您有帮助

这对我有用...

通过将 RelativeLayout 设置为 EditText 的根，因为 根视图上的边距将不起作用。

public void ShowDialog() {
        AlertDialog.Builder alertDialog = new AlertDialog.Builder(getActivity());
        alertDialog.setTitle("App Name");
        alertDialog.setMessage("Message");
        final EditText input = new EditText(getContext());
        input.setHint("Hint Text");
        LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.MATCH_PARENT,
                LinearLayout.LayoutParams.WRAP_CONTENT);
        lp.setMargins(36,36,36,36);
        input.setLayoutParams(lp);
        RelativeLayout container = new RelativeLayout(getContext());
        RelativeLayout.LayoutParams rlParams=new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,RelativeLayout.LayoutParams.WRAP_CONTENT);
        container.setLayoutParams(rlParams);
        container.addView(input);
        //now set view to dialog
        alertDialog.setView(container);
        alertDialog.setPositiveButton("Ohk", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                if (input.getText().toString().isEmpty()) {
                    input.setText("No Valid");
                    return;
                }
            }
        });
        alertDialog.show();
    }

Android: 设置警告对话框中编辑文本的边距

Android: Set Margin for Edit Text in AlertDialog Box

android

android-edittext

android-alertdialog

android-5.1.1-lollipop