Android：密碼顯示隱藏

效果：

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

    <EditText        android:id="@+id/editText1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:inputType="textPassword" >

        <requestFocus />
    </EditText>

    <CheckBox        android:id="@+id/checkBox1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="顯示密碼" /></LinearLayout>

package com.example.test;import android.app.Activity;import android.os.Bundle;import android.text.method.HideReturnsTransformationMethod;import android.text.method.PasswordTransformationMethod;import android.widget.CheckBox;import android.widget.CompoundButton;import android.widget.CompoundButton.OnCheckedChangeListener;import android.widget.TextView;public class MainActivity extends Activity {private TextView editText1;private CheckBox checkBox1;
    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);
        setContentView(R.layout.test);
        
        editText1 =(TextView) findViewById(R.id.editText1);
        checkBox1=(CheckBox) findViewById(R.id.checkBox1);

        checkBox1.setOnCheckedChangeListener(new OnCheckedChangeListener() {
            
            @Override            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {                // TODO Auto-generated method stub
                if(isChecked){                    //若是選中，顯示密碼                          editText1.setTransformationMethod(HideReturnsTransformationMethod.getInstance());
                }else{                    //不然隱藏密碼                    editText1.setTransformationMethod(PasswordTransformationMethod.getInstance());
                }
                
            }
        });
    }

}

關鍵是：

editText1.setTransformationMethod(HideReturnsTransformationMethod.getInstance());

editText1.setTransformationMethod(PasswordTransformationMethod.getInstance());