AutoCompleteTextView
一、实现效果
二、实现步骤
2.1 布局文件
<?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"
android:background="#ffffff"
android:orientation="vertical"
tools:context="com.example.edm.Student.SingleSubjectActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:background="#5DC45D">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="单科成绩及排名查询"
android:textSize="20sp"
android:paddingTop="20dp"
android:paddingLeft="25dp"
android:paddingBottom="10dp"
android:textColor="#FFFFFF">
</TextView>
<AutoCompleteTextView
android:id="@+id/auto_comp"
android:layout_width="320dp"
android:layout_height="39dp"
android:textSize="16sp"
android:textColor="#DE6210"
android:paddingLeft="10dp"
android:paddingRight="20dp"
android:drawableRight="@mipmap/tab_query_normal"
android:hint="输入科目名称:"
android:background="@drawable/edittext_selector"
android:maxLines="1"
android:paddingBottom="2dp"
android:paddingTop="2dp"
android:layout_marginTop="7dp"
android:layout_marginBottom="18dp"
android:layout_marginLeft="21dp"
android:completionThreshold="1">
</AutoCompleteTextView>
</LinearLayout>
</LinearLayout>
布局很简单,声明一个AutoCompleteTextView就好了。
2.2 弹出的item样式
item就是当我们输入时弹出的那个东东,长这样:
<?xml version="1.0" encoding="utf-8"?>
<TextView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ffffff"
android:padding="10dp"
android:textSize="16sp"
android:textColor="#000000">
</TextView>
2.3 主界面代码
package com.example.edm.Student;
import android.animation.ValueAnimator;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.MotionEvent;
import android.view.View;
import android.view.animation.LinearInterpolator;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;
import com.example.edm.MainActivity;
import com.example.edm.R;
import com.example.edm.SQLiteManager;
import com.example.edm.ToastUtil;
import java.util.List;
public class SingleSubjectActivity extends AppCompatActivity {
private ArrayAdapter<String> adapter;
private AutoCompleteTextView completeTextView;
String course[] = {"离散数学B", "高等数学B1", "高等数学B2", "C语言课程设计", "Java语言程序设计"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_single_subject);
findViews();
initView();
private void findViews() {
completeTextView = findViewById(R.id.auto_comp);
adapter = new ArrayAdapter<>(this, R.layout.auto_list, course);
completeTextView.setAdapter(adapter);
}
}