Android有删除按钮的EditText Android实现带有删除按钮的EditText代码实例

public class EditTextWithDel extends EditText {

 private final static String TAG = "EditTextWithDel";
 private Drawable imgInable;
 private Context mContext;

 public EditTextWithDel(Context context) {
  this(context, null, 0);
 }

 public EditTextWithDel(Context context, AttributeSet attrs) {
  this(context, attrs, 0);
 }

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

 private void init() {
  imgInable = mContext.getResources().getDrawable(android.R.drawable.ic_delete);
  addTextChangedListener(new TextWatcher() {
   @Override
   public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

   }

   @Override
   public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {

   }

   @Override
   public void afterTextChanged(Editable editable) {
    setDrawable();
   }
  });

  setDrawable();
 }

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

 // 处理删除操作


 @Override
 public boolean onTouchEvent(MotionEvent event) {
  if (imgInable != null && event.getAction() == MotionEvent.ACTION_UP) {
   int eventX = (int) event.getRawX();
   int eventY = (int) event.getRawY();
   Log.d(TAG, "(" + eventX + ", " + eventY + ")");
   Rect rect = new Rect();
   getGlobalVisibleRect(rect);
   rect.left = rect.right - 70;
   Log.d(TAG, rect.toString());
   if (rect.contains(eventX, eventY)) {
    setText("");
   }
  }

  return super.onTouchEvent(event);
 }

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