Android经常使用UI包裹 - EditText

EditText的信息接受用户输入是最重要的Android UI包裹，您可以使用EditText.getText()获取它的文本内容。

实例：EditTextDemo

执行效果：

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代码清单：

布局文件：main.xml

<?xml version="1.0" encoding="utf-8"?

>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:stretchColumns="1"
    >
    <TableRow>
        <TextView
            android:gravity="right"
            android:textStyle="bold"
            android:padding="3dip"
            android:text="用户名称："
        />
        <EditText
            android:id="@+id/username"
            android:padding="3dip"
            android:scrollHorizontally="true"
        />
    </TableRow>
    <TableRow>
        <TextView
            android:gravity="right"
            android:textStyle="bold"
            android:padding="3dip"
            android:text="用户密码："
        />

        <EditText
            android:id="@+id/password"
            android:padding="3dip"
            android:password="true"
        />
    </TableRow>
    <TableRow android:gravity="right">
        <Button
            android:id="@+id/cancel"
            android:text="取消"
        />
        <Button
            android:id="@+id/login"
            android:text="登录"
        />
    </TableRow>
</TableLayout>

Java源码文件：MainActivity.java

package com.rainsong.edittextdemo;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity
{
    Button btn_login;

    OnClickListener listener_login;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        listener_login = new OnClickListener() {
            public void onClick(View v) {
                EditText username = (EditText) findViewById(R.id.username);
                EditText password = (EditText) findViewById(R.id.password);
                Toast.makeText(MainActivity.this, "用户名称：" + username.getText()
                    + ", 用户密码：" + password.getText(),Toast.LENGTH_SHORT).show();
            }
        };

        btn_login = (Button)findViewById(R.id.login);
        btn_login.setOnClickListener(listener_login);
    }
}

API知识点

android.widget.EditText

public class

EditText

extends TextView



Known Direct Subclasses

AutoCompleteTextView, ExtractEditText, SearchEditText



Known Indirect Subclasses

MultiAutoCompleteTextView



Class Overview

EditText is a thin veneer over TextView that configures itself to be editable.



Public Constructors

EditText(Context context)

EditText(Context context, AttributeSet attrs)

EditText(Context context, AttributeSet attrs, int defStyleAttr)

EditText(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)



Editable getText()

Return the text the TextView is displaying.

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