Android 动态生成随机验证码：
效果图：
XML:
<?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" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp"
android:layout_marginTop="20dp"
android:orientation="horizontal" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="40dp"
android:background="@drawable/security_code_bg" >
<EditText
android:id="@+id/et_identify_code"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:background="@null"
android:hint="请输入右侧验证码" />
</LinearLayout>
<ImageView
android:id="@+id/iv_showCode"
android:layout_width="100dp"
android:layout_height="match_parent"
android:layout_marginLeft="10dp" />
</LinearLayout>
<Button
android:id="@+id/but_forgetpass_toSetCodes"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="20dp"
android:background="@drawable/buttonshape"
android:text="提交验证码"
android:textColor="@color/main_color_white" />
</LinearLayout>
MainActivity:
package com.example.securitycodedemo;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;
public class MainActivity extends ActionBarActivity implements OnClickListener{
private ImageView iv_showCode;
private EditText et_identify_code;
//产生的验证码
private String realCode;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
et_identify_code = (EditText) findViewById(R.id.et_identify_code);
Button but_toSetCode = (Button) findViewById(R.id.but_forgetpass_toSetCodes);
but_toSetCode.setOnClickListener(this);
iv_showCode = (ImageView) findViewById(R.id.iv_showCode);
//将验证码用图片的形式显示出来
iv_showCode.setImageBitmap(RandomCode.getInstance().createBitmap());
realCode = RandomCode.getInstance().getCode().toLowerCase();
iv_showCode.setOnClickListener(this);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.iv_showCode:
iv_showCode.setImageBitmap(RandomCode.getInstance().createBitmap());
realCode = RandomCode.getInstance().getCode().toLowerCase();
break;
case R.id.but_forgetpass_toSetCodes:
String identify_code = et_identify_code.getText().toString().toLowerCase();
if (identify_code.equals(realCode)) {
Toast.makeText(MainActivity.this, "验证码正确", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(MainActivity.this, "验证码错误", Toast.LENGTH_SHORT).show();
}
break;
}
}
}
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