android自定义控件之edittext

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代码如下：

<span style="font-size:18px;"><span style="font-size:18px;">package com.sunday.customs;import com.example.customs.R;import android.os.Bundle;import android.app.Activity;import android.view.Menu;public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}}</span></span>

自定义的edittext：

<span style="font-size:18px;">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;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);////添加监听器addTextChangedListener(new TextWatcher() {@Overridepublic void onTextChanged(CharSequence s, int start, int before, int count) {}@Overridepublic void beforeTextChanged(CharSequence s, int start, int count, int after) {}@Overridepublic void afterTextChanged(Editable s) {setDrawable();}});setDrawable();}//设置删除图片private void setDrawable() {if(length() < 1)//此函数功能是在edittext中加图片，并设置图片在里面的位置setCompoundDrawablesWithIntrinsicBounds(null, null, imgInable, null);elsesetCompoundDrawablesWithIntrinsicBounds(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();    }}</span>

布局文件：

<span style="font-size:18px;"><span style="font-size:18px;"><LinearLayout 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:orientation="vertical">    <com.sunday.customs.EditTextWithDel        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_margin="20dp"        android:hint="输入"        android:padding="7dp"        android:singleLine="true" />    <com.sunday.customs.EditTextWithDel        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_margin="20dp"        android:hint="输入"        android:padding="7dp"        android:singleLine="true" /></LinearLayout></span></span>

最终效果图：

当点击右侧衩号，清楚文本。

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