Android EditText內容監聽

標籤：

 監聽 EditText的內容變化，作出對應的處理。

 

MainActivity.class

 

package com.example.edittextdemo;import android.app.Activity;import android.os.Bundle;import android.text.Editable;import android.text.TextWatcher;import android.view.View;import android.view.View.OnClickListener;import android.view.View.OnFocusChangeListener;import android.widget.Button;import android.widget.EditText;import android.widget.TextView;public class MainActivity extends Activity {    EditText edit_phone;    Button btn_next;    String okdata;    TextView monitor_edit;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        EditText edit_Id = (EditText) findViewById(R.id.edit_Id);        btn_next = (Button) findViewById(R.id.btn_next);        monitor_edit = (TextView) findViewById(R.id.monitor_edit);        btn_next.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                if (!isId(okdata)) {                    monitor_edit.setText("請輸入正確的社會安全號碼！");                }            }        });        // EditText焦點的監聽        edit_Id.setOnFocusChangeListener(new OnFocusChangeListener() {            @Override            public void onFocusChange(View v, boolean hasFocus) {                // 當hasFocus = true 是擷取焦點                if (!hasFocus) {                    if (!isId(okdata)) {                        monitor_edit.setText("請輸入正確的社會安全號碼！");                    }                }            }        });        // 對EditText內容的即時監聽        edit_Id.addTextChangedListener(new TextWatcher() {            // 第二個執行            @Override            public void onTextChanged(CharSequence s, int start, int before,int count) {                System.out.println("onTextChanged:" + "start:" + start + "before:" + before + "count:" + count);            }            // 第一個執行            @Override            public void beforeTextChanged(CharSequence s, int start, int count,int after) {                System.out.println("beforeTextChanged:" + "start:" + start + "count:" + count + "after:" + after);            }            // 第三個執行            @Override            public void afterTextChanged(Editable s) { // Edittext中即時的內容                System.out.println("afterTextChanged:" + s);                okdata = s.toString();                if (isId(s.toString())) {                    monitor_edit.setText("正確!");                }else {                    monitor_edit.setText("請輸入正確的社會安全號碼！");                }            }        });    }    /**     * 是否為身份證     *      * @param idStr     * @return     */    public static boolean isId(String idStr) {        String regex = "^[0-9]{17}[0-9|xX]{1}$";        if (idStr == null || "".equals(idStr.trim())) {            return false;        } else if (idStr.matches(regex)) {            return true;        }        return false;    }}

 

activity_main.xml

 

<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"    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" >    <EditText        android:id="@+id/edit_Id"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:background="@null"        android:hint="輸入社會安全號碼" />    <TextView        android:id="@+id/monitor_edit"        android:layout_width="match_parent"        android:layout_height="20dp"        android:textColor="#FF0000" />    <EditText        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginTop="19dp"        android:background="@null"        android:hint="輸入姓名" />    <Button        android:id="@+id/btn_next"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="下一步（模仿）" /></LinearLayout>

 

Android EditText內容監聽