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  • Android经常使用UI包裹

    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:

    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.


    版权声明:本文博主原创文章。博客,未经同意不得转载。

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  • 原文地址:https://www.cnblogs.com/gcczhongduan/p/4871516.html
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