布局文件

tv_dialog.setOnClickListener(new OnClickListener(){

@Override

public void onClick(View v) {

AlertDialog.Builder builder = new Builder(_this);

LayoutInflater inflater = (LayoutInflater) _this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

View view = inflater.inflate(R.layout.change_pwd_dialog1, null);

EditText et_oldpwd = (EditText) view.findViewById(R.id.et_oldpwd);

EditText et_newpwd = (EditText) view.findViewById(R.id.et_newpwd);

EditText et_confirmpwd = (EditText) view.findViewById(R.id.et_confirmpwd);

builder.setTitle("修改密码");

builder.setView(view);

builder.setNegativeButton("取消", new DialogInterface.OnClickListener(){

@Override

public void onClick(DialogInterface dialog, int which) {

dialog.dismiss();

}

});

builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialog, int which) {

Toast.makeText(_this, "密码修改成功", Toast.LENGTH_SHORT).show();

}

});

builder.create().show();

}

});

<?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:layout_marginTop="10dp"
    android:layout_marginLeft="10dp"
    android:orientation="vertical" >
    <LinearLayout 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="5dp"
        android:orientation="horizontal">
        <TextView 
	        android:layout_width="wrap_content"
	        android:layout_height="wrap_content"
	        android:layout_gravity="center_vertical"
	        android:text="原密码："/>
        <EditText 
            android:id="@+id/et_oldpwd"
            android:layout_width="fill_parent"
            android:layout_marginLeft="10dp"
            android:inputType="numberPassword"
            android:singleLine="true"
            android:layout_gravity="center_vertical"
            android:layout_height="wrap_content"/>
    </LinearLayout>
     <LinearLayout 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="5dp"
        android:layout_gravity="center_vertical"
        android:orientation="horizontal">
        <TextView 
	        android:layout_width="wrap_content"
	        android:layout_height="wrap_content"
	        android:layout_gravity="center_vertical"
	        android:text="新密码："/>
        <EditText 
            android:id="@+id/et_newpwd"
            android:layout_width="fill_parent"
            android:layout_gravity="center_vertical"
            android:layout_marginLeft="10dp"
            android:inputType="numberPassword"
            android:singleLine="true"
            android:layout_height="wrap_content"/>
    </LinearLayout>
     <LinearLayout 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="5dp"
        android:orientation="horizontal">
        <TextView 
	        android:layout_width="wrap_content"
	        android:layout_height="wrap_content"
	        android:layout_gravity="center_vertical"
	        android:text="确认密码："/>
        <EditText 
            android:id="@+id/et_confirmpwd"
            android:layout_width="fill_parent"
            android:layout_marginLeft="10dp"
            android:inputType="numberPassword"
            android:singleLine="true"
            android:layout_gravity="center_vertical"
            android:layout_height="wrap_content"/>
    </LinearLayout>
</LinearLayout>