学步园

EditView  是可编辑文本域 它在android api中位置如下

本篇概述: 

1. 简单的EditView的示例 ,

EditText布局是在上篇的TextView布局上续写的

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:background="#4399f0"
    android:orientation="vertical"
    android:layout_height="match_parent" >
    
    <TextView 
        android:id="@+id/text_1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
		android:drawableRight="@drawable/ic_action_search"
		
		android:shadowColor="#ff0000"  
	    android:shadowDx="2"  
	    android:shadowDy="2"       
	    android:shadowRadius="3"
        android:text="@string/hello_world"
        
        />
     <TextView 
        android:id="@+id/text_2"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
		android:drawableRight="@drawable/ic_action_search"
		android:shadowColor="#456789"  
	    android:shadowDx="2"  
	    android:shadowDy="2"       
	    android:shadowRadius="3"
        android:text="@string/phone"
        />
      <TextView 
        android:id="@+id/text_3"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
		android:drawableRight="@drawable/ic_action_search"   
	    android:autoLink="all"  
        android:text="@string/myblogurl"
        />
      <TextView
   	   	 android:layout_width="fill_parent"
   	   	 android:layout_height="wrap_content"
   	   	 android:text="@string/myblogurl"
   	   	 android:textSize="18sp"
   	   	 android:autoLink="all"
   	   	 
   	   	 
   	   	 android:ellipsize="marquee"
   	   	 android:focusable="true"
   	   	 android:marqueeRepeatLimit="marquee_forever"
   	   	 android:focusableInTouchMode="true"
   	   	 android:scrollHorizontally="true"
   	   	 android:shadowColor="#ff0000"
   	   	 android:shadowRadius="3.0"
   	   />  
    <EditText
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:inputType="text"/>
    <EditText
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:drawableLeft="@drawable/ic_launcher"
        android:background="@layout/shape"
        android:hint="@string/phone"
        android:inputType="phone"/>
    
</LinearLayout>

需要注意的是, 这边的
android:background = "@layout/shape"

EditView使用了背景布局 shape.xml

<?xml version="1.0" encoding="utf-8"?>   
<shape xmlns:android="http://schemas.android.com/apk/res/android">   
    <gradient    
        android:startColor="#ffffff"    
        android:endColor="#000000"   
        android:angle="270"   
     />   
    <corners android:radius="30dp" />   
</shape>

android:shape="rectangle"        设置为rectangle 矩形

android:gradient 设置渐变背景颜色

<corners android:radius="30dp"/>  圆角半径为 30dp

OK , 我们在Activity中使用setContentView(),

public class MainActivity extends Activity 
{
	String strs = "";
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.edittext);

        /* TextView*/
        TextView text_1 = (TextView)findViewById(R.id.text_1);
        strs = text_1.getText().toString();
        SpannableStringBuilder style = new SpannableStringBuilder(strs);        
        style.setSpan(new BackgroundColorSpan(Color.RED),4,7,Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        style.setSpan(new ForegroundColorSpan(Color.BLUE),0,3,Spannable.SPAN_EXCLUSIVE_INCLUSIVE);           
        text_1.setText(style); 
        TextView text_2 = (TextView)findViewById(R.id.text_2);
        text_2.setText(Html.fromHtml("aaaaaaaaaaa<font color=blue>blue</font>aaaaaaaaa"));
    }

}

一些Shape.xml布局

<?xml version="1.0" encoding="utf-8"?> 
<shape xmlns:android="http://schemas.android.com/apk/res/android"> 
    <gradient  
        android:startColor="#3A3C39"  
        android:endColor="#181818" 
        android:angle="270" 
     /> 
    <corners android:radius="0dp" /> 
</shape>

android:background="@drawable/shape_background_grey" 

One android: angle = "270" on behalf of direction, that from top to bottom 270, 180, said right to left, the default left 
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <gradient android:type="radial" android:gradientRadius="250"
        android:startColor="#E9E9E9" android:endColor="#D4D4D4" />
</shape>


<shape xmlns:android="http://schemas.android.com/apk/res/android">
 <gradient android:angle="0" android:startColor="#FFdaf3fc"
  android:centerColor="#FFd4e9a9" android:endColor="#FFdaf3fc"/>
</shape>


Here should pay attention to android: type = "radial" type of use will have different effects 

android: centerColor = "# FFd4e9a9" Usually this is not being used 

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
        android:shape="rectangle">
        <gradient android:startColor="#509245" android:centerColor="#3e8532"
                android:endColor="#509245" android:type="linear" android:angle="90"
                android:centerX="0.5" android:centerY="0.5" />
        <padding android:left="7dp" android:top="7dp" android:right="7dp"
                android:bottom="7dp" />
        <corners android:radius="4dp" />
</shape>