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最新推荐文章于 2024-02-21 11:18:43 发布

Lowchai

最新推荐文章于 2024-02-21 11:18:43 发布

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分类专栏： TextView EditText

本文链接：https://blog.youkuaiyun.com/qq270963599/article/details/16827757

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本文深入探讨了自定义TextView类TextPage的功能特性及其实现细节，包括复制功能、上下文菜单事件处理、软键盘显示控制等。通过实例代码展示如何在Android应用中灵活运用该类以增强用户体验。

package wuyou.com.cn.view;

import java.lang.reflect.Method;

import android.content.Context;
import android.text.Editable;
import android.text.Selection;
import android.text.Spannable;
import android.text.TextUtils;
import android.text.method.ArrowKeyMovementMethod;
import android.text.method.MovementMethod;
import android.util.AttributeSet;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.inputmethod.EditorInfo;
import android.widget.EditText;
import android.widget.TextView;

/**
* 可复制的TextView
*
* @author DJY
*
*/
public class TextPage extends TextView {
public TextPage(Context context)
{
super(context, null);
init();
}

@Override
public boolean onTextContextMenuItem(int id)
{
  if (id == android.R.id.cut || id == android.R.id.paste)
   return true;
  return super.onTextContextMenuItem(id);
}

private void init()
{
  setFocusableInTouchMode(true);
  setLongClickable(true);
  setCursorVisible(false);
  setImeOptions(EditorInfo.TYPE_CLASS_TEXT);
  try
  {
   Class<EditText> cls = EditText.class;
   Method setShowSoftInputOnFocus = cls.getMethod("setShowSoftInputOnFocus", boolean.class);
   setShowSoftInputOnFocus.setAccessible(false);
   setShowSoftInputOnFocus.invoke(this, false);
  }
  catch (Exception e)
  {

}

public TextPage(Context context, AttributeSet attrs)
{
super(context, attrs);
init();
}

public TextPage(Context context, AttributeSet attrs, int defStyle)
{
super(context, attrs, defStyle);
init();
}

@Override
protected boolean getDefaultEditable()
{
return true;
}

@Override
public Editable getText()
{
return (Editable) super.getText();
}

@Override
public void setText(CharSequence text, BufferType type)
{
super.setText(text, BufferType.EDITABLE);
}

/**
* Convenience for {@link Selection#setSelection(Spannable, int, int)}.
*/
public void setSelection(int start, int stop)
{
Selection.setSelection(getText(), start, stop);
}

/**
* Convenience for {@link Selection#setSelection(Spannable, int)}.
*/
public void setSelection(int index)
{
Selection.setSelection(getText(), index);
}

/**
* Convenience for {@link Selection#selectAll}.
*/
public void selectAll()
{
Selection.selectAll(getText());
}

/**
* Convenience for {@link Selection#extendSelection}.
*/
public void extendSelection(int index)
{
Selection.extendSelection(getText(), index);
}

@Override
public void setEllipsize(TextUtils.TruncateAt ellipsis)
{
  if (ellipsis == TextUtils.TruncateAt.MARQUEE)
  {
   throw new IllegalArgumentException("EditText cannot use the ellipsize mode "
     + "TextUtils.TruncateAt.MARQUEE");
  }
  super.setEllipsize(ellipsis);
}
}