Regular expression for Email validation in java

       public boolean validateEmail(String email) {

              if ((email != null)

                           && email.matches("^[_A-Za-z0-9-\\+]+(\\.[_A-Za-z0-9-]+)*@"

                                         + "[A-Za-z0-9-]+(\\.[A-Za-z0-9]+)*(\\.[A-Za-z]{2,})$")) {

                     return true;

              }

              return false;

       }

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URLEncoder.encoder(string) is depreciated

URLEncoder.encoder(string)  ,URLEncoder.decoder(string) is depreciated.
Use URLEncoder.encoder(string ,string) instead.

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Fatal signal 11 (SIGSEGV) at 0xdeadd00d (code=1)

07-17 02:09:05.021: A/libc(18457): Fatal signal 11 (SIGSEGV) at 0xdeadd00d (code=1), thread 18532 (pool-1-thread-1)

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Android Alert Dialog

 Awesome Dialog



import android.app.Activity;
import android.app.Dialog;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.Button;
import android.widget.EditText;

public class AwesomeDialog extends Activity {
    EditText etSearch;
    Button showDialog;
    Dialog dialog;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        showDialog = (Button) findViewById(R.id.show_dialog);
        showDialog.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                dialog = new Dialog(AwesomeDialog.this,
                        android.R.style.Theme_Translucent);
                dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);

                dialog.setCancelable(true);
                dialog.setContentView(R.layout.dialog);
                Button done = (Button) dialog.findViewById(R.id.done);
                done.setOnClickListener(new OnClickListener() {

                    @Override
                    public void onClick(View v) {
                        dialog.dismiss();

                    }
                });
                dialog.show();

            }
        });

    }

}

package com.mobengineers;




 <?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle" >

    <gradient
        android:angle="90"
      android:endColor="#848484"
        android:startColor="#B6B6B6" />

    <padding
        android:bottom="10dp"
        android:left="10dp"
        android:right="10dp"
        android:top="10dp" />

    <stroke
        android:width="2dp"
        android:color="#000000" />

    <corners android:radius="40dp" />

</shape>



dialog.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:background="@drawable/bgdialog"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:text="Awesome Dialog"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <TextView
        android:id="@+id/etsearch"
        android:layout_width="250dp"
        android:layout_height="wrap_content"
        android:layout_below="@+id/tv"
        android:layout_centerHorizontal="true"
        android:layout_margin="10dp" >
    </TextView>

    <Button
        android:id="@+id/done"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/etsearch"
        android:layout_centerHorizontal="true"
        android:text=" Done" />

</RelativeLayout>



 Download Source code here



https://github.com/Pensio/Android-Awesome-Dialog.git

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Android Jellybean setError fix

public class EditTextErrorJellyBean extends EditText {
    public EditTextErrorFixed(Context context) {
        super(context);
    }

    public EditTextErrorJellyBean(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public EditTextErrorJellyBean(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    public boolean onKeyPreIme(int keyCode, KeyEvent event) {
        if (TextUtils.isEmpty(getText().toString())
                && keyCode == KeyEvent.KEYCODE_DEL)
            return true;
        else
            return super.onKeyPreIme(keyCode, event);
    }

    private Drawable lastErrorIcon = null;

    @Override
    protected void onFocusChanged(boolean focused, int direction,
            Rect previouslyFocusedRect) {
        super.onFocusChanged(focused, direction, previouslyFocusedRect);
        showErrorIconHax(lastErrorIcon);
    }

    @Override
    public void setError(CharSequence error, Drawable icon) {
        super.setError(error, icon);
        lastErrorIcon = icon;

        if (error != null) {
            showErrorIconHax(icon);
        }
    }

    private void showErrorIconHax(Drawable icon) {
        if (icon == null)
            return;

        if (android.os.Build.VERSION.SDK_INT != Build.VERSION_CODES.JELLY_BEAN
                && android.os.Build.VERSION.SDK_INT != Build.VERSION_CODES.JELLY_BEAN_MR1)
            return;

              Class<?> textview = Class.forName("android.widget.TextView");
            Field tEditor = textview.getDeclaredField("mEditor");
            tEditor.setAccessible(true);
            Class<?> editor = Class.forName("android.widget.Editor");
            Method privateShowError = editor.getDeclaredMethod("setErrorIcon",
                    Drawable.class);
            privateShowError.setAccessible(true);
            privateShowError.invoke(tEditor.get(this), icon);
        }
}

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Regular Expression Meta Characters

 

Regular Expression                   Description

\d                                                Any digits    [0-9]

 .                                                  Match Any character except new line

^                                                  Match the beginning of line

\                                                  escape next meta character

$                                                  Match the end of line

 |                                                    Alteration      ('0r' statement)

()                                                  Grouping

[]                                                  Custom character class

\d                                                Any digits    [0-9]

\D                                                Any non digit      [^0-9]

\s                                                 Any white space character    [\t\n\x0B\f\r]

\S                                                Any non white space charater

\w                                                Any word character

\W                                               Any non word character

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java.lang.IllegalArgumentException: Cannot draw recycled bitmaps

06-10 00:36:34.374: E/AndroidRuntime(2394): java.lang.IllegalArgumentException: Cannot draw recycled bitmaps
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.GLES20Canvas.drawBitmap(GLES20Canvas.java:789)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.GLES20RecordingCanvas.drawBitmap(GLES20RecordingCanvas.java:118)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.graphics.drawable.BitmapDrawable.draw(BitmapDrawable.java:393)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.widget.ImageView.onDraw(ImageView.java:967)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at com.pensio.papaya.views.PapayaCircularImageView.onDraw(PapayaCircularImageView.java:47)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.View.draw(View.java:13707)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.View.getDisplayList(View.java:12645)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.View.getDisplayList(View.java:12689)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.View.draw(View.java:13423)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.ViewGroup.drawChild(ViewGroup.java:2928)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2797)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.View.getDisplayList(View.java:12643)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.View.getDisplayList(View.java:12689)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.View.draw(View.java:13423)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.ViewGroup.drawChild(ViewGroup.java:2928)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2797)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.widget.AbsListView.dispatchDraw(AbsListView.java:2327)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.View.draw(View.java:13710)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.widget.AbsListView.draw(AbsListView.java:3653)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.View.getDisplayList(View.java:12645)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.View.getDisplayList(View.java:12689)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.View.draw(View.java:13423)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.ViewGroup.drawChild(ViewGroup.java:2928)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2797)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.View.getDisplayList(View.java:12643)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.View.getDisplayList(View.java:12689)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.View.draw(View.java:13423)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.ViewGroup.drawChild(ViewGroup.java:2928)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2797)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.View.getDisplayList(View.java:12643)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.View.getDisplayList(View.java:12689)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.View.draw(View.java:13423)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.ViewGroup.drawChild(ViewGroup.java:2928)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2797)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.View.getDisplayList(View.java:12643)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.View.getDisplayList(View.java:12689)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.View.draw(View.java:13423)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.ViewGroup.drawChild(ViewGroup.java:2928)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2797)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.View.draw(View.java:13710)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.widget.FrameLayout.draw(FrameLayout.java:467)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:2211)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.View.getDisplayList(View.java:12645)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.View.getDisplayList(View.java:12689)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.HardwareRenderer$GlRenderer.draw(HardwareRenderer.java:1198)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.ViewRootImpl.draw(ViewRootImpl.java:2173)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2045)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1854)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:989)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4351)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.Choreographer.doCallbacks(Choreographer.java:562)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.Choreographer.doFrame(Choreographer.java:532)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.os.Handler.handleCallback(Handler.java:725)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.os.Handler.dispatchMessage(Handler.java:92)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.os.Looper.loop(Looper.java:137)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at android.app.ActivityThread.main(ActivityThread.java:5039)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at java.lang.reflect.Method.invokeNative(Native Method)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at java.lang.reflect.Method.invoke(Method.java:511)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
06-10 00:36:34.374: E/AndroidRuntime(2394):     at dalvik.system.NativeStart.main(Native Method)

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