如何在Android中以编程方式设置EditText框的高度和宽度

Question

我想在Android中以编程方式管理一个EditText框的高度和宽度。 我尝试过edittext.setWidth(32);和edittext.setEms(50);，但两者都不起作用。 请查看以下代码，因为我正在使用它来在Android中创建动态EditText。

private EditText createEditText()
{
    final LayoutParams lparams = new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.FILL_PARENT);
    final EditText edittext = new EditText(this);
    edittext.setLayoutParams(lparams);
    edittext.setWidth(32);
    edittext.setEms(50);
    return edittext;
}

- Ronak Mehta

Answer 1

private EditText createEditText()
{
    final LayoutParams lparams = new LayoutParams(50,30); // Width , height
    final EditText edittext = new EditText(this);
    edittext.setLayoutParams(lparams);
    return edittext;
}

试试这个。

- Dhruvisha

---

应该导入哪个LayoutParams？ - Mann

需要导入ViewGroup.LayoutParams。 - MRK

我的editText在relativeLayout中，我遇到了以下错误：java.lang.ClassCastException: android.view.ViewGroup$LayoutParams无法转换为android.widget.RelativeLayout$LayoutParams。 - Matt

lparams中的height和width值以dp（密度像素）为单位吗？ - Palaniraja

Answer 2

edittext.getLayoutParams().width=32;

- JohnCookie

---

这让我遇到了空指针异常... :-( - JerabekJakub

Answer 3

DisplayMetrics metrics = new DisplayMetrics();
WindowManager wm = (WindowManager) this.getSystemService(Context.WINDOW_SERVICE);
wm.getDefaultDisplay().getMetrics(metrics);
final float height = metrics.heightPixels;

EditText edittext = new EditText(this);

edittext.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT,(int) (height/2)));

- B Roh

Answer 4

RelativeLayout.LayoutParams.width = 32; 
RelativeLayout.LayoutParams.height = 50;

适用于我。例如。

    lparams.width = 32;

- Narek Tootikian

Answer 5

    LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) edittext.getLayoutParams();
            params.width = mScreenWidth / 5;
            params.height = mScreenWidth / 5;
            edittext.setLayoutParams(params);

- sharma_kunal

Answer 6

尝试以下代码：-

Display display = getWindowManager().getDefaultDisplay(); 
    int screenWidth = display.getWidth();
    int screenHeight = display.getHeight();

profile_pic.getLayoutParams().height=(screenHeight/6);
    profile_pic.getLayoutParams().width=(screenHeight/6);

- Vipin Yadav