自己写个继承于View(textview或其他的)的类,便于自己特定 要求

main.xml

<?xml version=”1.0″ encoding=”utf-8″?>
<LinearLayout xmlns:android=”http://schemas.android.com/apk/res/android
    android:layout_width=”fill_parent”
    android:layout_height=”fill_parent”
    android:orientation=”vertical” >

    <TextView
        android:id=”@+id/af”
        android:layout_width=”fill_parent”
        android:layout_height=”wrap_content”
        android:text=”@string/hello” />
    <TextView  
    android:id=”@+id/xxx”  
    android:layout_width=”fill_parent”  
    android:layout_height=”wrap_content”  
    android:scrollbars=”vertical”                                     
    android:singleLine=”false”                                           
   android:maxLines=”12″                                  
    android:textColor=”#ffffff”   /> 
    
    
    <ntc.writetestview.TestViewtest   //调用某个包下继承与View的类********
     android:id=”@+id/tv”
   android:layout_width=”wrap_content” 
   android:layout_height=”wrap_content”  />
   

</LinearLayout>

主Activity

package ntc.writetestview;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.TextView;

public class TestViewtest extends TextView {
   
  private String mText;
 
   
     public TestViewtest(Context context, AttributeSet attrs) {  
        super(context, attrs);  
         // TODO Auto-generated constructor stub   
      
     }  
   
    public TestViewtest(Context context) {  
        super(context);  
        // TODO Auto-generated constructor stub   
     } 

     @Override  
     public CharSequence getText() {  
         // TODO Auto-generated method stub   
        return mText;  
    }  
  
    @Override  
     public void setText(CharSequence text, BufferType type) {  
         // TODO Auto-generated method stub   
         mText = (String) text;  
        if (mText.length()>22) {  
             StringBuffer subTextBuffer = new StringBuffer(mText.substring(0, 19));  
          subTextBuffer.append(“…”);  
             text = subTextBuffer;  
       }   
        super.setText(text, type);  
     }  
}

继承view的那个类

package ntc.writetestview;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.TextView;

public class TestViewtest extends TextView {
   
  private String mText;
 
   
     public TestViewtest(Context context, AttributeSet attrs) {  
        super(context, attrs);  
         // TODO Auto-generated constructor stub   
      
     }  
   
    public TestViewtest(Context context) {  
        super(context);  
        // TODO Auto-generated constructor stub   
     } 

     @Override  
     public CharSequence getText() {  
         // TODO Auto-generated method stub   
        return mText;  
    }  
  
    @Override  
     public void setText(CharSequence text, BufferType type) {  
         // TODO Auto-generated method stub   
         mText = (String) text;  
        if (mText.length()>22) {  
             StringBuffer subTextBuffer = new StringBuffer(mText.substring(0, 19));  
          subTextBuffer.append(“…”);  
             text = subTextBuffer;  
       }   
        super.setText(text, type);  
     }  
}

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