添加删除功能的EditText

EditTextWithDel组件的功能如下：

       1、在没用内容的时候显示不可用的图片状态，在有内容的时候显示可用的图片状态；

       2、在有内容的时候点击删除按钮可以删除EditText中的内容；

组件的代码如下：

[java]view plaincopyprint?

1. package com.sunday.customs;
2. import com.example.customs.R;
3. import android.content.Context;
4. import android.graphics.Rect;
5. import android.graphics.drawable.Drawable;
6. import android.text.Editable;
7. import android.text.TextWatcher;
8. import android.util.AttributeSet;
9. import android.util.Log;
10. import android.view.MotionEvent;
11. import android.widget.EditText;
12. /**
13. * @author sunday
14. * 2013-12-04
15. */
16. publicclass EditTextWithDel extends EditText {
17. privatefinalstatic String TAG = "EditTextWithDel";
18. private Drawable imgInable;
19. private Drawable imgAble;
20. private Context mContext;
21. public EditTextWithDel(Context context) {
22. super(context);
23. mContext = context;
24. init();
25. }
26. public EditTextWithDel(Context context, AttributeSet attrs, int defStyle) {
27. super(context, attrs, defStyle);
28. mContext = context;
29. init();
30. }
31. public EditTextWithDel(Context context, AttributeSet attrs) {
32. super(context, attrs);
33. mContext = context;
34. init();
35. }
36. privatevoid init() {
37. imgInable = mContext.getResources().getDrawable(R.drawable.delete_gray);
38. imgAble = mContext.getResources().getDrawable(R.drawable.delete);
39. addTextChangedListener(new TextWatcher() {
40. @Override
41. publicvoid onTextChanged(CharSequence s, int start, int before, int count) {}
42. @Override
43. publicvoid beforeTextChanged(CharSequence s, int start, int count, int after) {}
44. @Override
45. publicvoid afterTextChanged(Editable s) {
46. setDrawable();
47. }
48. });
49. setDrawable();
50. }
51. //设置删除图片
52. privatevoid setDrawable() {
53. if(length() < 1)
54. setCompoundDrawablesWithIntrinsicBounds(null, null, imgInable, null);
55. else
56. setCompoundDrawablesWithIntrinsicBounds(null, null, imgAble, null);
57. }
58. // 处理删除事件
59. @Override
60. publicboolean onTouchEvent(MotionEvent event) {
61. if (imgAble != null && event.getAction() == MotionEvent.ACTION_UP) {
62. int eventX = (int) event.getRawX();
63. int eventY = (int) event.getRawY();
64. Log.e(TAG, "eventX = " + eventX + "; eventY = " + eventY);
65. Rect rect = new Rect();
66. getGlobalVisibleRect(rect);
67. rect.left = rect.right - 50;
68. if(rect.contains(eventX, eventY))
69. setText("");
70. }
71. returnsuper.onTouchEvent(event);
72. }
73. @Override
74. protectedvoid finalize() throws Throwable {
75. super.finalize();
76. }
77. }

package com.sunday.customs;

import com.example.customs.R;

import android.content.Context;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.widget.EditText;

/**
 * @author sunday
 * 2013-12-04
 */
public class EditTextWithDel extends EditText {
	private final static String TAG = "EditTextWithDel";
	private Drawable imgInable;
	private Drawable imgAble;
	private Context mContext;

	public EditTextWithDel(Context context) {
		super(context);
		mContext = context;
		init();
	}

	public EditTextWithDel(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
		mContext = context;
		init();
	}

	public EditTextWithDel(Context context, AttributeSet attrs) {
		super(context, attrs);
		mContext = context;
		init();
	}

	private void init() {
		imgInable = mContext.getResources().getDrawable(R.drawable.delete_gray);
		imgAble = mContext.getResources().getDrawable(R.drawable.delete);
		addTextChangedListener(new TextWatcher() {
			@Override
			public void onTextChanged(CharSequence s, int start, int before, int count) {}
			@Override
			public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
			@Override
			public void afterTextChanged(Editable s) {
				setDrawable();
			}
		});
		setDrawable();
	}

	//设置删除图片
	private void setDrawable() {
		if(length() < 1)
			setCompoundDrawablesWithIntrinsicBounds(null, null, imgInable, null);
		else
			setCompoundDrawablesWithIntrinsicBounds(null, null, imgAble, null);
	}

	 // 处理删除事件
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (imgAble != null && event.getAction() == MotionEvent.ACTION_UP) {
            int eventX = (int) event.getRawX();
            int eventY = (int) event.getRawY();
            Log.e(TAG, "eventX = " + eventX + "; eventY = " + eventY);
            Rect rect = new Rect();
            getGlobalVisibleRect(rect);
            rect.left = rect.right - 50;
            if(rect.contains(eventX, eventY))
            	setText("");
        }
        return super.onTouchEvent(event);
    }

    @Override
    protected void finalize() throws Throwable {
        super.finalize();
    }

}

效果图如下：

添加删除功能的EditText