Android文本输入框(EditText)切换密码的显示与隐藏代码,Java代码库,德仔网

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【Java】 Android文本输入框(EditText)切换密码的显示与隐藏

作者:mh942408056 / 发布于2014/4/11/ 3713

Android文本输入框(EditText)切换密码的显示与隐藏

MainActivity如下:

package cc.c;

import android.app.Activity;
import android.os.Bundle;
import android.text.Selection;
import android.text.Spannable;
import android.text.method.HideReturnsTransformationMethod;
import android.text.method.PasswordTransformationMethod;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
/**
* Demo描述:
* 文本输入框(EditText)切换密码的显示与隐藏
*
* 参考资料:
* 1 http://developer.android.com/reference/android/text/method/HideReturnsTransformationMethod.html
* 2 http://developer.android.com/reference/android/text/method/PasswordTransformationMethod.html
* 3 http://blog.csdn.net/dawanganban/article/details/23374187
*  Thank you very much
*/
public class MainActivity extends Activity {
 private Button mSwitchButton;
 private EditText mPasswordEditText;
 private boolean isHidden=true;
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    init();
  }
  private void init(){
   mSwitchButton=(Button) findViewById(R.id.button);
   mPasswordEditText=(EditText) findViewById(R.id.editText);
   mSwitchButton.setOnClickListener(new OnClickListener() {
   @Override
   public void onClick(View v) {
    if (isHidden) {
     //设置EditText文本为可见的
     mPasswordEditText.setTransformationMethod(HideReturnsTransformationMethod.getInstance());
    } else {
     //设置EditText文本为隐藏的
     mPasswordEditText.setTransformationMethod(PasswordTransformationMethod.getInstance());
    }
    isHidden = !isHidden;
    mPasswordEditText.postInvalidate();
    //切换后将EditText光标置于末尾
    CharSequence charSequence = mPasswordEditText.getText();
    if (charSequence instanceof Spannable) {
     Spannable spanText = (Spannable) charSequence;
     Selection.setSelection(spanText, charSequence.length());
    }

   }
  });
  }
 
}



main.xml如下:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:orientation="vertical" >

  <EditText
    android:id="@+id/editText"
    android:layout_width="160dip"
    android:layout_height="40dip"
    android:hint="请输入密码"
    android:inputType="textPassword"
  />
 
  <Button
    android:id="@+id/button"
    android:layout_width="160dip"
    android:layout_height="40dip"
    android:text="切换显示方式"
  />

</LinearLayout>

试试其它关键字

　切换密码　

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