android - android - 使用按钮创建 EditText 字段

Question

我想用一个 Buttonclick 创建一些 EditText 字段，它们有自己的名称（eText1，eText2 ...）例如有一个按钮 +。用户可以单击该按钮来创建一个新的 EditText 字段。

Answer 1

您提供的上下文很少，但这段代码可能会让您更进一步：

EditText et1, et2, et3;

public void onCreate() {
    et1 = (EditText)findViewById(R.id.et1);
    et2 = (EditText)findViewById(R.id.et2);
    et3 = (EditText)findViewById(R.id.et3);
    et1.setVisibility(View.GONE);
    et2.setVisibility(View.GONE);
    et3.setVisibility(View.GONE);
}

public void clickHandlingMethod(View v) {
    et1.setVisibility(View.VISIBLE);
    et2.setVisibility(View.VISIBLE);
    et3.setVisibility(View.VISIBLE);
}

您只需隐藏所有EditTexts，当用户按下 时button，使它们可见。

编辑：看到您的用户可能加起来的评论 100 EditTexts，您可能想要使一些东西更加动态。试试这个，它会在Button点击时创建并添加一个：

ScrollView container; // create a scrollView in which you can put all EditTexts
static int totalEditTexts = 0;

public void onCreate(Bundle bundle) {
    super.onCreate(bundle);
    container = (ScrollView) findViewById(R.id.scrollView);
}

public void clicked(View view) {
    totalEditTexts++;
    if (totalEditTexts > 100)
        return;
    EditText editText = new EditText(this);
    //if you want to identify the created editTexts, set a tag, like below
    editText.setTag("EditText" + totalEditTexts);
    container.addView(editText);
}

编辑2：完整代码：

public class ScrollStuff extends Activity {
    LinearLayout containerLayout;
    static int totalEditTexts = 0;

    public void onCreate(Bundle bundle) {
        super.onCreate(bundle);
        setContentView(R.layout.scroll);
        containerLayout = (LinearLayout)findViewById(R.id.mlayout);
    }

    public void onBackPressed() {
        totalEditTexts++;
        if (totalEditTexts > 100)
            return;
        EditText editText = new EditText(this);
        containerLayout.addView(editText);
        editText.setGravity(Gravity.RIGHT);
        LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams) editText.getLayoutParams();
        layoutParams.width = LinearLayout.LayoutParams.MATCH_PARENT;
        editText.setLayoutParams(layoutParams);
        //if you want to identify the created editTexts, set a tag, like below
        editText.setTag("EditText" + totalEditTexts);

    }
}

XML:

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

    <LinearLayout
        android:id="@+id/mlayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical" >
    </LinearLayout>

</ScrollView>

请原谅我糟糕的命名选择以及我用于点击事件的事实，onBackPressed()我很着急。