大佬教程收集整理的这篇文章主要介绍了Android 验证码功能实现代码,大佬教程大佬觉得挺不错的,现在分享给大家,也给大家做个参考。
很简单的一个例子,点击刷新验证码,刷新当前显示的验证码,点击确定,如果输入的和显示的匹配,就会跳转到下一个界面中,这里只是实现了跳转,并没有进行其它的操作
好了 接下来就是代码了
首先看MainActivity的布局
<RelativeLayout xmlns:android="http://scheR_846_11845@as.android.com/apk/res/android" xmlns:tools="http://scheR_846_11845@as.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity" > <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:layout_marginLeft="20dp" android:layout_marginTop="77dp" android:text="验证码:" /> <EditText android:id="@+id/vc_code" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/textView1" android:layout_alignBottom="@+id/textView1" android:layout_toRightOf="@+id/textView1" android:ems="10" > <requestFocus /> </EditText> <Button android:id="@+id/vc_ok" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/vc_image" android:layout_alignRight="@+id/vc_shuaixi" android:layouT_Below="@+id/vc_shuaixi" android:layout_marginTop="15dp" android:text="确定" /> <Button android:id="@+id/vc_shuaixi" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignRight="@+id/vc_code" android:layout_alignTop="@+id/vc_image" android:layout_marginRight="20dp" android:text="刷新验证码" /> <ImageView android:id="@+id/vc_image" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/textView1" android:layouT_Below="@+id/vc_code" android:layout_marginTop="25dp" android:src="@drawable/ic_launcher" /> </RelativeLayout>
package com.example.yanzhengma; import android.R.String; import android.os.bundle; import android.app.Activity; import android.content.CliPDAta.Item; import android.content.Intent; import android.view.Menu; import android.view.View; import android.view.View.onClickListener; import android.widget.button; import android.widget.EditText; import android.widget.ImageView; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends Activity implements OnClickListener { ImageView vc_image; // 图片 Button vc_shuaixi,vc_ok; String getCode = null; EditText vc_code; @Override protected void onCreate(Bundle savedInstanceStatE) { super.onCreate(savedInstanceStatE); setContentView(R.layout.activity_main); vc_image = (ImageView) findViewById(R.id.vc_imagE); vc_image.setImageBitmap(Code.geTinstance().getBitmap()); vc_code = (EditText) findViewById(R.id.vc_codE); getCode = Code.geTinstance().getCode(); // 获取显示的验证码 vc_shuaixi = (Button) findViewById(R.id.vc_shuaixi); vc_shuaixi.setOnClickListener(this); vc_ok = (Button) findViewById(R.id.vc_ok); vc_ok.setOnClickListener(this); } @Override public Boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main,menu); return true; } @Override public void onClick(View view) { // TODO Auto-generated method stub switch (view.getId()) { case R.id.vc_shuaixi: vc_image.setImageBitmap(Code.geTinstance().getBitmap()); getCode = Code.geTinstance().getCode(); break; case R.id.vc_ok: String v_code = vc_code.getText().toString().trim(); if (v_code == null || v_code.equals("")) { Toast.makeText(MainActivity.this,"验证码为空",Toast.LENGTH_SHORT).show(); } else if (!v_code.equals(getCodE)) { Toast.makeText(MainActivity.this,"验证码错误",Toast.LENGTH_SHORT).show(); } else { Toast.makeText(MainActivity.this,"验证成功",Toast.LENGTH_SHORT).show(); Intent iTintent = new Intent(MainActivity.this,secondActivity.class); startActivity(iTintent); MainActivity.this.finish(); } break; } } }
好了,到重点部分了,绘制验证码
package com.example.yanzhengma; import java.util.Random; import android.graphics.bitmap; import android.graphics.bitmap.Config; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; public class Code { 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 Code bpUtil; private Code() { }; public static Code geTinstance() { if (bpUtil == null) bpUtil = new Code(); return bpUtil; } 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 = 35;// 左边距范围值 private static final int BASE_PADDING_TOP = 42;// 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 = 70;// 默认高度.图片的总高 private final int DEFAULT_COLOR = 0xdf;// 默认背景颜色值 privatE int width = DEFAULT_WIDTH; privatE int height = DEFAULT_HEIGHT; privatE int base_padding_left = BASE_PADDING_LEFT; privatE int range_padding_left = RANGE_PADDING_LEFT; privatE int base_padding_top = BASE_PADDING_TOP; privatE int range_padding_top = RANGE_PADDING_TOP; privatE int codeLength = DEFAULT_CODE_LENGTH; privatE int line_number = DEFAULT_LINE_numbER; privatE int font_size = DEFAULT_FONT_SIZE; private String code;// 验证码 privatE int padding_left,padding_top; private Random random = new Random(); private Bitmap createBitmap() { padding_left = 0; Bitmap bp = Bitmap.createBitmap(width,height,Config.ARGB_8888); Canvas c = new Canvas(bp); code = createCode(); c.drawColor(Color.rgb(DEFAULT_COLOR,DEFAULT_COLOR,DEFAULT_COLOR)); Paint paint = new Paint(); paint.setTextSize(font_sizE); for (int i = 0; i < code.length(); i++) { randomTextStyle(paint); randomPadding(); c.drawText(code.charAt(i) + "",padding_left,padding_top,paint); } for (int i = 0; i < line_number; i++) { drawLine(c,paint); } c.save(Canvas.all_SAVE_FLAG); c.restore();// return bp; } public String getCode() { return code; } public Bitmap getBitmap() { return createBitmap(); } private String createCode() { StringBuilder buffer = new StringBuilder(); for (int i = 0; i < codeLength; i++) { buffer.append(CHARS[random.nexTint(CHARs.length)]); } return buffer.toString(); } private void drawLine(Canvas canvas,Paint paint) { int color = randomColor(); int startX = random.nexTint(width); int startY = random.nexTint(height); int stopX = random.nexTint(width); int stopY = random.nexTint(height); paint.setstrokeWidth(1); paint.setColor(color); canvas.drawLine(startX,startY,stopX,stopY,paint); } privatE int randomColor() { return randomColor(1); } privatE int randomColor(int ratE) { int red = random.nexTint(256) / rate; int green = random.nexTint(256) / rate; int blue = random.nexTint(256) / rate; return Color.rgb(red,green,bluE); } private void randomTextStyle(Paint paint) { int color = randomColor(); paint.setColor(color); paint.setFakeBoldText(random.nextBoolean()); // true为粗体,false为非粗体 float skewX = random.nexTint(11) / 10; skewX = random.nextBoolean() ? skewX : -skewX; paint.setTextSkewX(skewX); // float类型参数,负数表示右斜,整数左斜 } private void randomPadding() { padding_left += base_padding_left + random.nexTint(range_padding_left); padding_top = base_padding_top + random.nexTint(range_padding_top); } }
好了 代码都有注释,应该会看的明白的
以上所述是小编给大家介绍的Android 验证码@L_801_23@实现代码,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对编程小技巧网站的支持!
以上是大佬教程为你收集整理的Android 验证码功能实现代码全部内容,希望文章能够帮你解决Android 验证码功能实现代码所遇到的程序开发问题。
如果觉得大佬教程网站内容还不错,欢迎将大佬教程推荐给程序员好友。
本图文内容来源于网友网络收集整理提供,作为学习参考使用,版权属于原作者。
如您有任何意见或建议可联系处理。小编QQ:384754419,请注明来意。