Android AutoCompleteTextView 示例

Android AutoCompleteTextView 根據(jù)保留的單詞進行字詞補全，因此無需編寫單詞的所有字符。愛掏網(wǎng) - it200.com

Android AutoCompleteTextView是可編輯的文本字段，它在下拉菜單中顯示建議列表，用戶可以僅選擇一個建議或值。愛掏網(wǎng) - it200.com

Android AutoCompleteTextView是EditText類的子類。愛掏網(wǎng) - it200.com而MultiAutoCompleteTextView是AutoCompleteTextView類的子類。愛掏網(wǎng) - it200.com

在此示例中，我們將編程語言顯示在自動完成文本視圖中。愛掏網(wǎng) - it200.com所有的編程語言都存儲在字符串數(shù)組中。愛掏網(wǎng) - it200.com我們使用 ArrayAdapter 類來顯示數(shù)組內(nèi)容。愛掏網(wǎng) - it200.com

讓我們看看Android中autocompletetextview的簡單示例。愛掏網(wǎng) - it200.com

activity_main.xml

從面板中拖動AutoCompleteTextView和TextView，現(xiàn)在activity_main.xml文件將會是這樣的：

<?xml version="1.0" encoding="utf-8"?>  
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    xmlns:app="http://schemas.android.com/apk/res-auto"  
    xmlns:tools="http://schemas.android.com/tools"  
    android:layout_width="match_parent"  
    android:layout_height="match_parent"  
    tools:context="example.javatpoint.com.autocompletetextview.MainActivity">  

    <TextView  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:text="What is your favourite programming language?"  
        app:layout_constraintBottom_toBottomOf="parent"  
        app:layout_constraintLeft_toLeftOf="parent"  
        app:layout_constraintRight_toRightOf="parent"  
        app:layout_constraintTop_toTopOf="parent"  
        app:layout_constraintVertical_bias="0.032" />  

    <AutoCompleteTextView  
        android:id="@+id/autoCompleteTextView"  
        android:layout_width="200dp"  
        android:layout_height="wrap_content"  
        android:layout_marginLeft="92dp"  
        android:layout_marginTop="144dp"  
        android:text=""  
        app:layout_constraintStart_toStartOf="parent"  
        app:layout_constraintTop_toTopOf="parent" />  

</android.support.constraint.ConstraintLayout>  

Activity類

讓我們來編寫AutoCompleteTextView的代碼。愛掏網(wǎng) - it200.com

package example.javatpoint.com.autocompletetextview;

import android.graphics.Color;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;

public class MainActivity extends AppCompatActivity {
    String[] language ={"C","C++","Java",".NET","iPhone","Android","ASP.NET","PHP"};
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //Creating the instance of ArrayAdapter containing list of language names
        ArrayAdapter adapter = new ArrayAdapter
                (this,android.R.layout.select_dialog_item,language);
        //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.RED);
    }
}

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