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安卓之autocompletetextview

安卓之autocompletetextview

作者: bluewind1230 | 来源:发表于2018-01-18 15:33 被阅读0次
    activity_main:
    
    
    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout 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="com.example.my_autocompletetextview.MainActivity">
    
    
     <AutoCompleteTextView
         android:id="@+id/autocomplete"
         android:completionThreshold="1"
         android:layout_width="match_parent"
         android:layout_height="wrap_content" />
     <!--<TextView-->
         <!--android:layout_width="wrap_content"-->
         <!--android:layout_height="wrap_content"-->
         <!--android:text="Hello World!"-->
         <!--app:layout_constraintBottom_toBottomOf="parent"-->
         <!--app:layout_constraintLeft_toLeftOf="parent"-->
         <!--app:layout_constraintRight_toRightOf="parent"-->
         <!--app:layout_constraintTop_toTopOf="parent" />-->
    
    </LinearLayout>
    
    
    item.xml:
    <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    
        <ImageView
            android:src="@mipmap/ic_launcher"
            android:layout_width="30dp"
            android:layout_height="30dp" />
        <TextView
            android:id="@+id/text"
            android:textSize="20sp"
            android:text="hah"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />
    
    </LinearLayout>
    
    
    package com.example.my_autocompletetextview;
    
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.view.View;
    import android.widget.AdapterView;
    import android.widget.ArrayAdapter;
    import android.widget.AutoCompleteTextView;
    import android.widget.Toast;
    
    public class MainActivity extends AppCompatActivity {
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
    
            //1.准备数据源
            final String string[] = {"北京","上海","广州","1235","hello"};
            //2.准备适配器
            ArrayAdapter<String> adapter = new ArrayAdapter<String>(
                    MainActivity.this,     //
                    R.layout.item,                 //显示的布局
                    R.id.text,                     //显示的字符串
                    string);                       //数据源
            //3.让控件和适配器进行关联
            AutoCompleteTextView autoCompleteTextView = findViewById(R.id.autocomplete);
            autoCompleteTextView.setAdapter(adapter);
    
            //当点击了某一列响应
            autoCompleteTextView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                @Override
                public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                    Toast.makeText(MainActivity.this,string[i],Toast.LENGTH_LONG).show();
                }
            });
        }
    
    }
    
    

    效果:(输出代码中具有的字符串的时候,会自动显示出来!)


    image.png

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