安卓app_sl4_1带自动提示的输入框_自动完成文本框的示范

安卓app_sl4_1带自动提示的输入框_自动完成文本框的示范

<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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.sl4_1.MainActivity" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

    <AutoCompleteTextView
        android:id="@+id/autoCompleteTextView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:completionThreshold="2"
        android:layout_below="@+id/textView1"
        android:layout_marginTop="52dp"
        android:ems="10"
        android:completionHint="请输入搜索内容"
        android:text="" >

        <requestFocus />
    </AutoCompleteTextView>

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/autoCompleteTextView1"
        android:layout_marginTop="28dp"
        android:text="搜索" />

</RelativeLayout>

package com.example.sl4_1;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity {

private static final String[] comps=new String[]{"ab明天科技","明天科技有限公司ab","省明天科技ab有限公司","明天编程ab词典","明天"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final AutoCompleteTextView textview=(AutoCompleteTextView) findViewById(R.id.autoCompleteTextView1);
ArrayAdapter<String> adapter=new ArrayAdapter<String>(this,android.R.layout.simple_dropdown_item_1line,comps);
textview.setAdapter(adapter);
Button button=(Button) findViewById(R.id.button1);
button.setOnClickListener(new OnClickListener(){

@Override
public void onClick(View v) {
// TODO 自动生成的方法存根
if(textview.getText().toString().length()==0)
{
Toast.makeText(MainActivity.this, "查询信息为空", Toast.LENGTH_SHORT).show();
}
else
{
Toast.makeText(MainActivity.this, textview.getText().toString(), Toast.LENGTH_SHORT).show();
}

}

});
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}