问题

// 创建一个新按钮
Button b = new Button(this);
b.setText(someText);
b.setId(id);
b.setAllCaps(false);
b.setTextColor(getResources().getColor(R.color.textOnButton));
b.setBackground(drawable);
b.setOnClickListener(new View.OnClickListener() {
    public void onClick(View v) {
        doAction(v);
    }
});

// 获取线性布局并设置参数
LinearLayout linear = findViewById(R.id.linearLayout);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
    LinearLayout.LayoutParams.MATCH_PARENT, BUTTON_HEIGHT);
params.setMargins(LEFT_MARGIN_BUTTON, TOP_MARGIN_BUTTON, RIGHT_MARGIN_BUTTON, DOWN_MARGIN_BUTTON);
linear.setOrientation(LinearLayout.VERTICAL);

// 将按钮添加到线性布局中
linear.addView(b, params);

但是，如果我使用此可绘制对象作为按钮的背景，它会显示为：

中间的白色混乱部分是一些文本，应该显示为类似于这样的内容：

理想情况下，我希望将按钮的高度更改为系统默认文本大小加上一些间距。有办法解决这个问题吗？

<details>
<summary>英文:</summary>

For my app I want to add buttons to a linearlayout programmatically with a background to make it look better. For the background I use a drawable. The drawable is defined as:
```xml
&lt;shape xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot;
    android:shape=&quot;rectangle&quot;&gt;
    &lt;solid android:color=&quot;@color/colorPrimary&quot; /&gt;
    &lt;corners
        android:bottomRightRadius=&quot;24dp&quot;
        android:bottomLeftRadius=&quot;24dp&quot;
        android:topRightRadius=&quot;24dp&quot;
        android:topLeftRadius=&quot;24dp&quot;/&gt;
&lt;/shape&gt;

The button is defined programaticaly by:

//make new button
Button b = new Button(this);
b.setText(someText);
b.setId(id);
b.setAllCaps(false);
b.setTextColor(getResources().getColor(R.color.textOnButton));
b.setBackground(drawable);
b.setOnClickListener(new View.OnClickListener() {
    public void onClick(View v) {
        doAction(v);
    }
});

//setParameters of Linearlayout
LinearLayout linear = findViewById(R.id.linearLayout);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
    LinearLayout.LayoutParams.MATCH_PARENT, BUTTON_HEIGHT);
params.setMargins(LEFT_MARGIN_BUTTON, TOP_MARGIN_BUTTON,RIGHT_MARGIN_BUTTON,DOWN_MARGIN_BUTTON);
linear.setOrientation(LinearLayout.VERTICAL);

//add button to linearlayout
linear.addView(b, params);

However, if I make a button with this drawable as background, it will appear as:

The white mess in the middle is some text that should appear as something like this:

Idealy I would like to change the height of the button to the default textsize of the system plus some margin. Is there way to fix this?

答案1

得分: 1

使用：

LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
    LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);

在你的情况下，你也可以使用一个简单的 MaterialButton：

val b = MaterialButton(this)
b.cornerRadius = resources.getDimensionPixelOffset(R.dimen.cornerSize)

LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
    LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);

 val b = MaterialButton(this)
 b.cornerRadius = resources.getDimensionPixelOffset(R.dimen.cornerSize)

答案2

得分: 0

另一种实现这个目的的方法是使用：

//首先获取默认文本高度
int textSize = (int) new Button(this).getTextSize();

//然后将布局的高度设置为这个默认文本高度加上一些常数
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
     LinearLayout.LayoutParams.MATCH_PARENT,
     textSize + BUTTON_TEXT_MARGIN);

//first acquire the default text height
int textSize = (int) new Button(this).getTextSize();

//then set the height of the layout to this default text height plus some constant
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
     LinearLayout.LayoutParams.MATCH_PARENT,
     textSize + BUTTON_TEXT_MARGIN);