Android使用表格布局设计注册界面

Android中使用表格布局设计注册界面，供大家参考，具体内容如下

注册页面包含：用户名，密码，确认密码，验证码。验证码使用一个封装好的工具类生成的，可以直接使用。效果图如下所示。没有做事件处理，仅仅做了个简单的表格布局。

XML布局的代码如下：

<?xml version='1.0' encoding='utf-8'?><TableLayout 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:stretchColumns='1' tools:context='com.example.nuist__njupt.register.MainActivity'><TextView android: android:layout_height='wrap_content' android:layout_width='wrap_content' android:text='用户注册' android:textSize='20dp' android:gravity='center_horizontal' android:textColor='@android:color/black' android:layout_marginTop='5dp' /> <TableRow><TextView android: android:text='用户名' android:textSize='15dp' android:layout_marginLeft='5dp' android:layout_marginTop='20dp' android:textColor='@android:color/black' /><EditText android:layout_width='match_parent' android: android:hint='请输入用户名' android:textSize='15dp' android:layout_marginTop='20dp' android:selectAllOnFocus='true' android:layout_span='2' /> </TableRow> <TableRow><TextView android: android:text='密码' android:textSize='15dp' android:layout_marginLeft='5dp' android:textColor='@android:color/black' /><EditText android:layout_width='match_parent' android: android:hint='请输入密码' android:textSize='15dp' android:inputType='textPassword' android:layout_span='2' /> </TableRow> <TableRow><TextView android: android:text='确认密码' android:textSize='15dp' android:layout_marginLeft='5dp' android:textColor='@android:color/black' /><EditText android:layout_width='match_parent' android: android:hint='请再次输入密码' android:textSize='15dp' android:inputType='textPassword' android:layout_span='2' /> </TableRow> <TableRow><TextView android: android:text='验证码' android:textSize='15dp' android:layout_marginLeft='5dp' android:textColor='@android:color/black' /><EditText android:layout_width='match_parent' android: android:hint='请输入验证密码' android:textSize='15dp' android:layout_toLeftOf ='@+id/image' /><ImageView android: android:layout_width='100dp' android:layout_height='40dp'/> </TableRow> <Buttonandroid: android:layout_height='wrap_content'android:layout_width='match_parent'android:text='注册'android:textColor='@android:color/black'android:textSize='15dp'android:gravity='center_horizontal'/> <Buttonandroid: android:layout_height='wrap_content'android:layout_width='match_parent'android:text='取消'android:textColor='@android:color/black'android:textSize='15dp'android:gravity='center_horizontal'/></TableLayout>

java代码如下：

public class MainActivity extends AppCompatActivity { private Bitmap bitmap; private String code; @Override protected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);final ImageView image = (ImageView) findViewById(R.id.image); //获取需要展示图片验证码的ImageViewbitmap = CodeUtils.getInstance().createBitmap(); //获取工具类生成的图片验证码对象code = CodeUtils.getInstance().getCode(); //获取当前图片验证码的对应内容用于校验image.setImageBitmap(bitmap);image.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) {bitmap = CodeUtils.getInstance().createBitmap();code = CodeUtils.getInstance().getCode();image.setImageBitmap(bitmap);Toast.makeText(MainActivity.this, code, Toast.LENGTH_SHORT).show(); //图片验证码内容提示 }}); }}

工具类CodeUtils的代码如下：

/** * Created by nuist__NJUPT on 2021/4/16. */public class CodeUtils { //随机码集 private static final char[] CHARS = { ’0’, ’1’, ’2’, ’3’, ’4’, ’5’, ’6’, ’7’, ’8’, ’9’, ’a’, ’b’, ’c’, ’d’, ’e’, ’f’, ’g’, ’h’, ’i’, ’j’, ’k’, ’l’, ’m’, ’n’, ’o’, ’p’, ’q’, ’r’, ’s’, ’t’, ’u’, ’v’, ’w’, ’x’, ’y’, ’z’, ’A’, ’B’, ’C’, ’D’, ’E’, ’F’, ’G’, ’H’, ’I’, ’J’, ’K’, ’L’, ’M’, ’N’, ’O’, ’P’, ’Q’, ’R’, ’S’, ’T’, ’U’, ’V’, ’W’, ’X’, ’Y’, ’Z’ }; private static CodeUtils mCodeUtils; private int mPaddingLeft, mPaddingTop; private StringBuilder mBuilder = new StringBuilder(); private Random mRandom = new Random(); //Default Settings private static final int DEFAULT_CODE_LENGTH = 4;//验证码的长度 这里是4位 private static final int DEFAULT_FONT_SIZE = 60;//字体大小 private static final int DEFAULT_LINE_NUMBER = 3;//多少条干扰线 private static final int BASE_PADDING_LEFT = 20; //左边距 private static final int RANGE_PADDING_LEFT = 30;//左边距范围值 private static final int BASE_PADDING_TOP = 70;//上边距 private static final int RANGE_PADDING_TOP = 15;//上边距范围值 private static final int DEFAULT_WIDTH = 200;//默认宽度.图片的总宽 private static final int DEFAULT_HEIGHT = 100;//默认高度.图片的总高 private static final int DEFAULT_COLOR = Color.rgb(0xee, 0xee, 0xee);//默认背景颜色值 private String code; public static CodeUtils getInstance() {if (mCodeUtils == null) { mCodeUtils = new CodeUtils();}return mCodeUtils; } //生成验证码图片 public Bitmap createBitmap() {mPaddingLeft = 0; //每次生成验证码图片时初始化mPaddingTop = 0;Bitmap bitmap = Bitmap.createBitmap(DEFAULT_WIDTH, DEFAULT_HEIGHT, Bitmap.Config.ARGB_8888);Canvas canvas = new Canvas(bitmap);code = createCode();canvas.drawARGB(0, 0, 0, 0);canvas.drawColor(DEFAULT_COLOR);Paint paint = new Paint();paint.setTextSize(DEFAULT_FONT_SIZE);for (int i = 0; i < code.length(); i++) { randomTextStyle(paint); randomPadding(); canvas.drawText(code.charAt(i) + '', mPaddingLeft, mPaddingTop, paint);}//干扰线for (int i = 0; i < DEFAULT_LINE_NUMBER; i++) { drawLine(canvas, paint);}canvas.save();//保存canvas.restore();return bitmap; } /** * 得到图片中的验证码字符串 * * @return */ public String getCode() {return code; } //生成验证码 public String createCode() {mBuilder.delete(0, mBuilder.length()); //使用之前首先清空内容for (int i = 0; i < DEFAULT_CODE_LENGTH; i++) { mBuilder.append(CHARS[mRandom.nextInt(CHARS.length)]);}return mBuilder.toString(); } //生成干扰线 private void drawLine(Canvas canvas, Paint paint) {int color = randomColor();int startX = mRandom.nextInt(DEFAULT_WIDTH);int startY = mRandom.nextInt(DEFAULT_HEIGHT);int stopX = mRandom.nextInt(DEFAULT_WIDTH);int stopY = mRandom.nextInt(DEFAULT_HEIGHT);paint.setStrokeWidth(1);paint.setColor(color);canvas.drawLine(startX, startY, stopX, stopY, paint); } //随机颜色 private int randomColor() {mBuilder.delete(0, mBuilder.length()); //使用之前首先清空内容String haxString;for (int i = 0; i < 3; i++) { haxString = Integer.toHexString(mRandom.nextInt(0xEE)); if (haxString.length() == 1) {haxString = '0' + haxString; } mBuilder.append(haxString);}return Color.parseColor('#' + mBuilder.toString()); } //随机文本样式 private void randomTextStyle(Paint paint) {int color = randomColor();paint.setColor(color);paint.setFakeBoldText(mRandom.nextBoolean()); //true为粗体，false为非粗体float skewX = mRandom.nextInt(11) / 10;skewX = mRandom.nextBoolean() ? skewX : -skewX;paint.setTextSkewX(skewX); //float类型参数，负数表示右斜，整数左斜paint.setUnderlineText(mRandom.nextBoolean()); //true为下划线，false为非下划线paint.setStrikeThruText(mRandom.nextBoolean()); //true为删除线，false为非删除线 } //随机间距 private void randomPadding() {mPaddingLeft += BASE_PADDING_LEFT + mRandom.nextInt(RANGE_PADDING_LEFT);mPaddingTop = BASE_PADDING_TOP + mRandom.nextInt(RANGE_PADDING_TOP); }}

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