Custom ImageView to generate captcha image.

Jinesh Francis

Last update: Oct 18, 2022

Related tags

Overview

CaptchaImageView

Custom ImageView to generate captcha image.

Add CaptchaImageView to your layout

 <test.jinesh.captchaimageviewlib.CaptchaImageView
            android:layout_width="wrap_content"
            android:id="@+id/image"
            android:layout_weight="6"
            android:layout_margin="5dp"
            android:layout_height="50dp"
            />

Call regenerate() method on CaptchaImageView to regenerate your captcha

 captchaImageView= (CaptchaImageView) findViewById(R.id.image);
 refreshButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                captchaImageView.regenerate();
            }
 });

Call getCaptchaCode() method on CaptchaImageView to read last generated captcha code.

 captchaImageView.getCaptchaCode()

Use in your project

1.Add it in your root build.gradle at the end of repositories:

	allprojects {
		repositories {
			...
			maven { url 'https://jitpack.io' }
		}
	}

2.Add the dependency in your app build.gradle file:

dependencies {
	        compile 'com.github.jineshfrancs:CaptchaImageView:1.0'
}

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Comments

CaptchaImageView Exception
Hi,

I tried using the class for my project, but when i run the application it crashes. *****This is my call

<Button android:id="@+id/btnCaptchaRefresh" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_marginLeft="3dp" android:layout_marginStart="3dp" android:background="@drawable/synchronization1" android:onClick="refreshCaptcha" /> <FrameLayout android:id="@+id/flCaptchaContainer" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_toLeftOf="@+id/btnCaptchaRefresh" > <com.mjc.activity.common.CaptchaImageView android:id="@+id/ivCaptcha" android:layout_width="fill_parent" android:layout_height="50dp" android:scaleType="fitXY" android:layout_marginLeft="7dp" android:adjustViewBounds="true" /> </FrameLayout>

..........................

*****This is the stack trace i am getting. 07-26 18:55:22.466: E/AndroidRuntime(5511): FATAL EXCEPTION: main 07-26 18:55:22.466: E/AndroidRuntime(5511): Process: com.mjc.gametime.black, PID: 5511 07-26 18:55:22.466: E/AndroidRuntime(5511): java.lang.IllegalArgumentException: width and height must be > 0 07-26 18:55:22.466: E/AndroidRuntime(5511): at android.graphics.Bitmap.createBitmap(Bitmap.java:810) 07-26 18:55:22.466: E/AndroidRuntime(5511): at android.graphics.Bitmap.createBitmap(Bitmap.java:789) 07-26 18:55:22.466: E/AndroidRuntime(5511): at android.graphics.Bitmap.createBitmap(Bitmap.java:756) 07-26 18:55:22.466: E/AndroidRuntime(5511): at com.mjc.activity.common.CaptchaImageView$CaptchaGenerator.regenerate(CaptchaImageView.java:138) 07-26 18:55:22.466: E/AndroidRuntime(5511): at com.mjc.activity.common.CaptchaImageView$CaptchaGenerator.access$0(CaptchaImageView.java:127) 07-26 18:55:22.466: E/AndroidRuntime(5511): at com.mjc.activity.common.CaptchaImageView.draw(CaptchaImageView.java:36) 07-26 18:55:22.466: E/AndroidRuntime(5511): at com.mjc.activity.common.CaptchaImageView.reDraw(CaptchaImageView.java:111) 07-26 18:55:22.466: E/AndroidRuntime(5511): at com.mjc.activity.common.CaptchaImageView.onWindowFocusChanged(CaptchaImageView.java:256) 07-26 18:55:22.466: E/AndroidRuntime(5511): at android.view.View.dispatchWindowFocusChanged(View.java:8681) 07-26 18:55:22.466: E/AndroidRuntime(5511): at android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java:1060) 07-26 18:55:22.466: E/AndroidRuntime(5511): at android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java:1060) 07-26 18:55:22.466: E/AndroidRuntime(5511): at android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java:1060) 07-26 18:55:22.466: E/AndroidRuntime(5511): at android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java:1060) 07-26 18:55:22.466: E/AndroidRuntime(5511): at android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java:1060) 07-26 18:55:22.466: E/AndroidRuntime(5511): at android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java:1060) 07-26 18:55:22.466: E/AndroidRuntime(5511): at android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java:1060) 07-26 18:55:22.466: E/AndroidRuntime(5511): at android.view.ViewGroup.dispatchWindowFocusChanged(ViewGroup.java:1060) 07-26 18:55:22.466: E/AndroidRuntime(5511): at android.view.ViewRootImpl$ViewRootHandler.handleMessage(ViewRootImpl.java:3302) 07-26 18:55:22.466: E/AndroidRuntime(5511): at android.os.Handler.dispatchMessage(Handler.java:102) 07-26 18:55:22.466: E/AndroidRuntime(5511): at android.os.Looper.loop(Looper.java:135) 07-26 18:55:22.466: E/AndroidRuntime(5511): at android.app.ActivityThread.main(ActivityThread.java:5282) 07-26 18:55:22.466: E/AndroidRuntime(5511): at java.lang.reflect.Method.invoke(Native Method) 07-26 18:55:22.466: E/AndroidRuntime(5511): at java.lang.reflect.Method.invoke(Method.java:372) 07-26 18:55:22.466: E/AndroidRuntime(5511): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) 07-26 18:55:22.466: E/AndroidRuntime(5511): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
opened by EJosef 5