Android 自定义EditText输入框带清空按钮

 package com.example.myedittexttest; 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.view.MotionEvent; import android.widget.EditText; public class MyEditText extends EditText {	private final String TAG = "MyEditText";	private Drawable dRight;	private Rect rBounds;	public MyEditText(Context paramContext) {	super(paramContext);	initEditText();	}	public MyEditText(Context paramContext, AttributeSet paramAttributeSet) {	super(paramContext, paramAttributeSet);	initEditText();	}	public MyEditText(Context paramContext, AttributeSet paramAttributeSet, int paramInt) {	super(paramContext, paramAttributeSet, paramInt);	initEditText();	}	// 初始化edittext 控件	private void initEditText() {	setEditTextDrawable();	addTextChangedListener(new TextWatcher() { // 对文本内容改变进行监听	@Override	public void afterTextChanged(Editable paramEditable) {	}	@Override	public void beforeTextChanged(CharSequence paramCharSequence, int paramInt1, int paramInt2, int paramInt3) {	}	@Override	public void onTextChanged(CharSequence paramCharSequence, int paramInt1, int paramInt2, int paramInt3) {	MyEditText.this.setEditTextDrawable();	}	});	}	// 控制图片的显示	public void setEditTextDrawable() {	if (getText().toString().length() == 0) {	setCompoundDrawables(null, null, null, null);	} else {	setCompoundDrawables(null, null, this.dRight, null);	}	}	@Override	protected void onDetachedFromWindow() {	super.onDetachedFromWindow();	this.dRight = null;	this.rBounds = null;	}	/** * 添加触摸事件 点击之后 出现 清空editText的效果 */	@Override	public boolean onTouchEvent(MotionEvent paramMotionEvent) {	if ((this.dRight != null) && (paramMotionEvent.getAction() == 1)) {	this.rBounds = this.dRight.getBounds();	int i = (int) paramMotionEvent.getRawX();// 距离屏幕的距离	// int i = (int) paramMotionEvent.getX();//距离边框的距离	if (i > getRight() - 3 * this.rBounds.width()) {	setText("");	paramMotionEvent.setAction(MotionEvent.ACTION_CANCEL);	}	}	return super.onTouchEvent(paramMotionEvent);	}	/** * 显示右侧X图片的 * * 左上右下 */	@Override	public void setCompoundDrawables(Drawable paramDrawable1, Drawable paramDrawable2, Drawable paramDrawable3, Drawable paramDrawable4) {	if (paramDrawable3 != null)	this.dRight = paramDrawable3;	super.setCompoundDrawables(paramDrawable1, paramDrawable2, paramDrawable3, paramDrawable4);	} }

 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".MainActivity" > <com.example.myedittexttest.MyEditText android:id="@+id/edit_text" android:layout_width="fill_parent" android:layout_height="50dp" android:layout_marginTop="50dp" android:background="#88aaff" android:drawableRight="@drawable/edit_clear" android:textCursorDrawable="@null" /> <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/edit_text" android:layout_marginTop="84dp" android:layout_toRightOf="@+id/textView1" android:text="Button" /> </RelativeLayout>

 android:drawableRight="@drawable/edit_clear"

 android:textCursorDrawable="@null"

 android:cursorVisible="true"//显示 android:cursorVisible="false"//隐藏