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以編程方式RelativeLayout.ALIGN_RIGHT與給定的View.getId()無效

[英]Programmatically RelativeLayout.ALIGN_RIGHT with a given View.getId() not working

我嘗試以編程方式將TextView對齊到按鈕的右/下邊緣。 但是,這個靜態xml代碼正在工作:

<RelativeLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New Button"
        android:id="@+id/button" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="New Text"
        android:id="@+id/textView10"
        android:layout_alignRight="@+id/button"
        android:layout_alignBottom="@+id/button" />
</RelativeLayout>

如果我嘗試通過代碼執行它,它不起作用。 默認情況下,TextView在頂部/左側對齊。 RelativeLayout.ALIGN_RIGHT和ALIGN_BOTTOM似乎被忽略了......

            // Adding the LinearLayout
  LinearLayout linearLayout = new LinearLayout(getContext());
  linearLayout.setOrientation(LinearLayout.VERTICAL);
  linearLayout.setLayoutParams(new LinearLayout.LayoutParams(
          LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT, 1.0f));

            final LinearLayout.LayoutParams LLParamsCont = new LinearLayout.LayoutParams(
                    LinearLayout.LayoutParams.WRAP_CONTENT, Utils.dpToPx(getContext(), 50));

                    // Adding the RelativeLayout
        RelativeLayout relativeLayout = new RelativeLayout(getContext());
        relativeLayout.setLayoutParams(LLParamsCont);

                    // Adding the Button
        Button button = new Button(getContext());
        button.setLayoutParams(new RelativeLayout.LayoutParams(
                RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT));
        relativeLayout.addView(button)

                    // Adding the TextView
        TextView textView = new TextView(getContext());
        textView.setGravity(Gravity.CENTER_HORIZONTAL);
        RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(
                Utils.dpToPx(getContext(), 20),
                Utils.dpToPx(getContext(), 20));
        layoutParams.addRule(RelativeLayout.ALIGN_RIGHT, button.getId());        // <== THIS DOESN'T SEEM TO WORK
        layoutParams.addRule(RelativeLayout.ALIGN_BOTTOM, button.getId());       // <== THIS DOESN'T SEEM TO WORK
        textView.setLayoutParams(layoutParams);
        textView.setTextSize(TypedValue.COMPLEX_UNIT_SP, 12);
        textView.setGravity(Gravity.CENTER);
        textView.setBackgroundResource(R.drawable.score_count);
        relativeLayout.addView(textView);

        linearLayout.addView(relativeLayout)

TextView只是沒有與Button的右/底行對齊。

有沒有人知道為什么不能通過代碼工作,但使用靜態xml? 我錯過了什么?

謝謝!

最誠摯的問候,Juergen

嘗試在創建規則之前為Button設置唯一ID此處有更多信息)。

Button button = new Button(getContext());
button.setId(View.generateViewId()); //this utility method is API 17!

我在這篇文章中找到了解決方案: 如何以編程方式在RelativeLayout中布局視圖?

我需要將setId(int)的id設置為Button,然后才能正常工作。

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