安卓初识基本控件_AutoCompleteTextView

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大家在使用百度搜索框的时候，会发现好像都有联想，类似这种

安卓中也提供这样的控件，AutoCompleteTextView

xml布局：

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

main代码：

AutoCompleteTextView auto = (AutoCompleteTextView) findViewById(R.id.auto);<span style="white-space:pre"></span>String[] attr = {"AA","A","AAA","BB","V","BV"};<span style="white-space:pre"></span>ArrayAdapter<String> mAdapter = new ArrayAdapter<>(this, R.layout.spinner_item,R.id.tv,attr);<span style="white-space:pre"></span>auto.setAdapter(mAdapter);<span style="white-space:pre"></span>//设置匹配个数  默认是2个字符<span style="white-space:pre"></span>auto.setThreshold(1);<span style="white-space:pre"></span>//设置提示信息<span style="white-space:pre"></span>auto.setCompletionHint("单击选择符合的一项");<span style="white-space:pre"></span><span style="white-space:pre"></span>auto.setDropDownBackgroundResource(R.drawable.yellow);<span style="white-space:pre"></span>//设置背景图片<span style="white-space:pre"></span>auto.setDropDownBackgroundDrawable(getResources().getDrawable(R.drawable.ic_launcher));<span style="white-space:pre"></span>auto.setDropDownHeight(200);<span style="white-space:pre"></span>//设置高度   默认都是充满的<span style="white-space:pre"></span>auto.setDropDownWidth(200);<span style="white-space:pre"></span>//设置宽度   默认都是充满的<span style="white-space:pre"></span>auto.setOnItemClickListener(new OnItemClickListener() {<span style="white-space:pre"></span>@Override<span style="white-space:pre"></span>public void onItemClick(AdapterView<?> parent, View view,<span style="white-space:pre"></span>int position, long id) {<span style="white-space:pre"></span>String ss = parent.getItemAtPosition(position).toString();<span style="white-space:pre"></span>}<span style="white-space:pre"></span>});auto = (AutoCompleteTextView) findViewById(R.id.auto);String[] attr = {"AA","A","AAA","BB","V","BV"};ArrayAdapter<String> mAdapter = new ArrayAdapter<>(this, R.layout.spinner_item,R.id.tv,attr);auto.setAdapter(mAdapter);//设置匹配个数  默认是2个字符auto.setThreshold(1);//设置提示信息auto.setCompletionHint("单击选择符合的一项");auto.setDropDownBackgroundResource(R.drawable.yellow);//设置背景图片auto.setDropDownBackgroundDrawable(getResources().getDrawable(R.drawable.ic_launcher));auto.setDropDownHeight(200);//设置高度   默认都是充满的auto.setDropDownWidth(200);//设置宽度   默认都是充满的auto.setOnItemClickListener(new OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> parent, View view,int position, long id) {String ss = parent.getItemAtPosition(position).toString();}});

这里上面设置的背景是下面整个下拉框，另外宽度和高度这里自定义，而不是默认的充满。

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