无法在AlertDialog内以编程方式更改EditText边距

Question

我的应用程序中有一个包含EditText字段的AlertDialog.此对话框需要以编程方式生成,并且应与当用户通过触摸EditTextPreference编辑文本时由Android自动显示的EditTextPreference对话框外观相匹配.这一切都有效,但以编程方式插入的EditText的大小太宽,与触摸时EditTextPreference显示的大小不匹配.以下两个图像显示了该问题.

使用setView()添加到AlertDialog时,EditText看起来像这样:

但应该看起来像这样:

以下是XML中负责EditTextPreference的XML代码:

<EditTextPreference
            android:title="Enter Name"
            android:key="name"
            android:defaultValue=""
            android:summary=""
            android:inputType="textCapSentences|textMultiLine"
            android:singleLine="false"
            android:gravity="top|left"
            android:lines="2"
            android:minLines="1"
            android:maxLines="2"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:scrollbars="vertical"
            />

以及负责我的对话的Java代码:

AlertDialog.Builder alertDialog = new AlertDialog.Builder(mainActivity);
alertDialog.setTitle("Enter Date");

final EditText input = new EditText(mainActivity);
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.WRAP_CONTENT);
input.setLayoutParams(lp);
input.setGravity(android.view.Gravity.TOP|android.view.Gravity.LEFT);
input.setInputType(InputType.TYPE_TEXT_FLAG_CAP_SENTENCES|InputType.TYPE_TEXT_FLAG_MULTI_LINE);
input.setLines(1);
input.setMaxLines(1);
input.setText(lastDateValue);
alertDialog.setView(input);

Answer 1

在这之前你必须添加一个容器,例如 LinearLayout

AlertDialog.Builder alertDialog = new AlertDialog.Builder(mainActivity);
alertDialog.setTitle("Enter Date");

LinearLayout container = new LinearLayout(this);
container.setOrientation(LinearLayout.VERTICAL);
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.WRAP_CONTENT);
lp.setMargins(left, top, right, bottom);
final EditText input = new EditText(mainActivity);
input.setLayoutParams(lp);
input.setGravity(android.view.Gravity.TOP|android.view.Gravity.LEFT);
input.setInputType(InputType.TYPE_TEXT_FLAG_CAP_SENTENCES|InputType.TYPE_TEXT_FLAG_MULTI_LINE);
input.setLines(1);
input.setMaxLines(1);
input.setText(lastDateValue);
container.addView(input, params);

alertDialog.setView(container);

我希望它有帮助:)

Answer 2

AlertDialog.Builder alertDialog = new AlertDialog.Builder(mainActivity);
alertDialog.setTitle("Enter Date");

final EditText input = new EditText(mainActivity);
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.WRAP_CONTENT);
lp.setMargins(left, top, right, bottom);
input.setLayoutParams(lp);
input.setGravity(android.view.Gravity.TOP|android.view.Gravity.LEFT);
input.setInputType(InputType.TYPE_TEXT_FLAG_CAP_SENTENCES|InputType.TYPE_TEXT_FLAG_MULTI_LINE);
input.setLines(1);
input.setMaxLines(1);
input.setText(lastDateValue);
alertDialog.setView(input);

请按上述方式更改您的代码并提供所需的所有边距