自定义带删除的文本框

今天药忘吃喽~ 2022-08-07 03:34 132阅读 0赞

控件文件   clear\_edite.xml  
  
   
<LinearLayout xmlns:android=" [http://schemas.android.com/apk/res/android][http_schemas.android.com_apk_res_android]"  
    android:layout\_width="match\_parent"  
    android:layout\_height="match\_parent"  
    android:padding="5dp"  
    android:orientation="horizontal"  
    android:gravity="center\_vertical"  
    android:background="@drawable/backgroudshap"  
    >  
  
    <EditText  
        android:id="@+id/et"  
        android:layout\_width="0dp"  
        android:layout\_height="match\_parent"  
        android:layout\_weight="1"  
        android:singleLine="true"  
        android:background="\#00000000"  
        android:text="aaqaaa"  
        />  
  
    <ImageButton  
        android:id="@+id/ib"  
        android:layout\_width="20dp"  
        android:layout\_height="20dp"  
        android:background="\#00000000"  
        android:src="@drawable/ic\_launcher"  
        android:visibility="gone"  
        android:scaleType="fitCenter"  
        />  
  
</LinearLayout>  
  
控件文件EditCancel.java  
package com.example.testapp;  
  
import android.content.Context;  
import android.text.Editable;  
import android.text.TextWatcher;  
import android.util.AttributeSet;  
import android.view.LayoutInflater;  
import android.view.View;  
import android.widget.EditText;  
import android.widget.ImageButton;  
import android.widget.LinearLayout;  
  
public class EditCancel extends LinearLayout implements EdtInterface \{  
  
    ImageButton ib;  
    EditText et;  
  
    public EditCancel(Context context) \{  
        super(context);  
    \}  
  
    public EditCancel(Context context, AttributeSet attrs) \{  
        super(context, attrs);  
        LayoutInflater.from(context).inflate(R.layout.clear\_edite, this, true);  
        init(attrs);  
    \}  
  
    private void init(AttributeSet attrs) \{  
        ib = (ImageButton) findViewById(R.id.ib);  
        et = (EditText) findViewById(R.id.et);  
        et.addTextChangedListener(tw);  
        ib.setOnClickListener(new OnClickListener() \{  
            @Override  
            public void onClick(View v) \{  
                hideBtn();// 隐藏按钮  
                et.setText("");  
            \}  
        \});  
        int resouceId = -1;  
        resouceId = attrs.getAttributeResourceValue(null, "Text", 0);  
        if (resouceId > 0) \{  
           String Text = context.getResources().getText(resouceId).toString();  
           et.setHint(Text);  
        \} else \{  
            et.setHint("关键字");  
        \}  
  
         
    \}  
  
    TextWatcher tw = 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) \{  
  
        \}  
  
        // 在文字改变后调用  
        @Override  
        public void afterTextChanged(Editable s) \{  
            if (s.length() == 0) \{  
                hideBtn();// 隐藏按钮  
            \} else \{  
                showBtn();// 显示按钮  
            \}  
        \}  
  
    \};  
  
    @Override  
    public void hideBtn() \{  
        // 设置按钮不可??  
        if (ib.isShown())  
            ib.setVisibility(View.GONE);  
    \}  
  
    @Override  
    public void showBtn() \{  
        // 设置按钮可见  
        if (!ib.isShown())  
            ib.setVisibility(View.VISIBLE);  
    \}  
\}  
  
interface EdtInterface \{  
    public void hideBtn();  
    public void showBtn();  
\}  
  
引用文件部分  
    <com.example.testapp.EditCancel  
        android:layout\_width="match\_parent"  
        android:layout\_height="30dp"  
        android:layout\_margin="10dp"  
        Text = "@string/keyword">  
  
个人理解，控件的大小设成match\_parent，把设置大小的权力交给引用文件部分。  
  
[http://wujiandong.iteye.com/blog/1184921][http_wujiandong.iteye.com_blog_1184921]

[http_schemas.android.com_apk_res_android]: http://schemas.android.com/apk/res/android
[http_wujiandong.iteye.com_blog_1184921]: http://wujiandong.iteye.com/blog/1184921