1.相关属性:
android:completionHint:设置下拉菜单中的提示标题
android:completionHintView:定义提示视图中显示下拉菜单
android:completionThreshold:指定用户至少输入多少个字符才会显示提示
android:dropDownAnchor:设置下拉菜单的定位"锚点"组件,如果没有指定改属性, 将使用该TextView作为定位"锚点"组件
android:dropDownHeight:设置下拉菜单的高度
android:dropDownWidth:设置下拉菜单的宽度
android:dropDownHorizontalOffset:指定下拉菜单与文本之间的水平间距
android:dropDownVerticalOffset:指定下拉菜单与文本之间的竖直间距
android:dropDownSelector:设置下拉菜单点击效果
android:popupBackground:设置下拉菜单的背景

 

 

实现代码:

这里的话就不自定义布局了,直接用ArrayAdapter来实现吧!

布局文件:activity_main.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:orientation="vertical"
    tools:context=".MainActivity">

    <AutoCompleteTextView
        android:id="@+id/atv_content"
        android:layout_width="match_parent"
        android:layout_height="48dp"
        android:completionHint="请输入搜索内容"
        android:completionThreshold="1"
        android:dropDownHorizontalOffset="5dp" />

    <MultiAutoCompleteTextView
        android:id="@+id/matv_content"
        android:layout_width="match_parent"
        android:layout_height="48dp"
        android:completionThreshold="1"
        android:dropDownHorizontalOffset="5dp"
        android:text="" />
    
</LinearLayout>
MainActivity.java:

public class MainActivity extends AppCompatActivity {

    private AutoCompleteTextView atv_content;
    private MultiAutoCompleteTextView matv_content;

    private static final String[] data = new String[]{
            "小猪猪", "小狗狗", "小鸡鸡", "小猫猫", "小咪咪"
    };


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        atv_content = (AutoCompleteTextView) findViewById(R.id.atv_content);
        matv_content = (MultiAutoCompleteTextView) findViewById(R.id.matv_content);


        ArrayAdapter<String> adapter = new ArrayAdapter<String>(MainActivity.
                this, android.R.layout.simple_dropdown_item_1line, data);
        atv_content.setAdapter(adapter);

        ArrayAdapter<String> adapter2 = new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_dropdown_item_1line, data);
        matv_content.setAdapter(adapter);
        matv_content.setTokenizer(new MultiAutoCompleteTextView.CommaTokenizer());
    }
}
部分代码分析:

android:completionThreshold="1":这里我们设置了输入一个字就显示提示
android:completionHint="请输入搜索内容":这是框框底部显示的文字,如果觉得丑 可以android:completionHintView设置一个View!
android:dropDownHorizontalOffset="5dp":设置了水平边距为5dp
matv_content.setTokenizer(new MultiAutoCompleteTextView.CommaTokenizer()); setTokenizer是为其设置分隔符