0x03 Android入坑之EditText

0x01 EditText

0x02 AutoCompleteTextView

AutoCompleteTextView是一个自动提示内容的文本框，其是EditText的一个子类
android:completionThreshold="n"其中n为输入n+个字符就显示匹配结果
通过ArrayAdapter<String> arrayAdapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, strings);和
autoCompleteTextView.setAdapter(arrayAdapter);来绑定控件，其中strings为字符串数组，是供匹配的数据源
XML文件

<AutoCompleteTextView
        android:hint="input"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textView2"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginTop="20dp"
        android:textSize="20sp"
        android:completionThreshold="2"
        android:id="@+id/autoCompleteTextView1" />

Java代码

package com.feng.learn1;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;

public class MainActivity extends AppCompatActivity {

    private AutoCompleteTextView autoCompleteTextView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        /*
         * 0x01:初始化控件
         * 0x02:需要一个适配器
         * 0x03:初始化数据源
         * 0x04:将adpter与控件绑定
         */
        autoCompleteTextView = (AutoCompleteTextView) findViewById(R.id.autoCompleteTextView1);
        String []strings = {"Android sdk","Android studio","Ans","Java","Javac"};
        ArrayAdapter<String> arrayAdapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, strings);
        autoCompleteTextView.setAdapter(arrayAdapter);
    }
}

AutoCompleteTextView.png

0x03 MultiAutoCompleteTextView

MultiAutoCompleteTextView可支持选择多个值（分别用分隔符隔开）并且在每个值选中的情况下可以根据当前输入匹配，如发邮箱……
XML文件（与AutoCompleteTextView类似）

<MultiAutoCompleteTextView
        android:hint="input"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textView2"
        android:layout_centerVertical="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginTop="20dp"
        android:textSize="20sp"
        android:completionThreshold="2"
        android:id="@+id/multiAutoCompleteTextView1" />

Java代码

package com.feng.learn1;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.MultiAutoCompleteTextView;

public class MainActivity extends AppCompatActivity {

    private MultiAutoCompleteTextView multiAutoCompleteTextView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        /*
         * 0x01:初始化控件
         * 0x02:需要一个适配器
         * 0x03:初始化数据源
         * 0x04:将adpter与控件绑定
         * 0x05:设置分隔符（下例为逗号）
         */
        multiAutoCompleteTextView = (MultiAutoCompleteTextView) findViewById(R.id.multiAutoCompleteTextView1);
        String []strings = {"Android sdk","Android studio","Ans","Java","Javac"};
        ArrayAdapter<String> arrayAdapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, strings);
        multiAutoCompleteTextView.setAdapter(arrayAdapter);
        multiAutoCompleteTextView.setTokenizer(new MultiAutoCompleteTextView.CommaTokenizer());
    }
}

MultiAutoCompleteTextView.png