如何使用菜单创建EditText?

时间:2018-11-13 09:25:44

标签: android kotlin android-edittext

我想创建EditText,并在其下方单击可单击的菜单。用户应该能够将自己的自定义文本写入EditText或从预定义选项中进行选择。

我虽然打算在recyclerView下添加EditText,但是对于4-5个选项,它浪费了recylerView。有什么方法可以做得更好(我不想为此功能编写很多代码)。

enter image description here

2 个答案:

答案 0 :(得分:0)

尝试一下, xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical">

<TextView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="State:" />

<AutoCompleteTextView
    android:id="@+id/autoCompleteTextView"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />

java

public class MainActivity extends AppCompatActivity {
AutoCompleteTextView autoCompleteTextView;
String[] arr={"used","new","repaired"};
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main2);
    autoCompleteTextView=findViewById(R.id.autoCompleteTextView);
    ArrayAdapter aa=new ArrayAdapter(this,android.R.layout.simple_list_item_1,arr);
    autoCompleteTextView.setAdapter(aa);
}

}

答案 1 :(得分:0)

AutoCompleteTextView是一个组件,用于在编写可编辑文本字段时显示建议。建议列表显示在下拉菜单中,用户可以从中选择所需的项目。建议列表是从适配器获得的,并且仅在阈值中指定的多个字符之后出现。

这是AutoCompleteTextView的简单示例:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools" 
        android:layout_width="match_parent"
        android:layout_height="match_parent" 
        android:paddingLeft="@dimen/activity_horizontal_margin"
        android:paddingRight="@dimen/activity_horizontal_margin"
        android:paddingTop="@dimen/activity_vertical_margin"
        android:paddingBottom="@dimen/activity_vertical_margin" 
       tools:context=".MainActivity">

        <TextView
            android:id="@+id/textView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_alignParentTop="true"
            android:layout_marginTop="15dp"
            android:text="X" />

        <AutoCompleteTextView
            android:id="@+id/autoCompleteTextView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_below="@+id/textView"
            android:layout_marginLeft="36dp"
            android:layout_marginTop="17dp"
            android:ems="10"
            android:text="">

            <requestFocus />
        </AutoCompleteTextView>

    </RelativeLayout>

MainActivity.java在下面定义。

 public class MainActivity extends Activity {
        String[] animals = {"Ant", "Bbird", "Cat"};

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);

            //Creating the instance of ArrayAdapter containing list of fruit names
            ArrayAdapter<String> adapter = new ArrayAdapter<String>
                    (this, android.R.layout.select_dialog_item, animals);
            //Getting the instance of AutoCompleteTextView
            AutoCompleteTextView actv = (AutoCompleteTextView) findViewById(R.id.autoCompleteTextView);
            actv.setThreshold(1);//will start working from first character
            actv.setAdapter(adapter);//setting the adapter data into the AutoCompleteTextView
            actv.setTextColor(Color.BLACK);

        }
    }