URL checker

app/src/main/java/com/jens/automation2/ActivityManageActionTriggerUrl.java

@@ -6,6 +6,9 @@ import android.content.DialogInterface;
 import android.content.Intent;
 import android.os.Build;
 import android.os.Bundle;
+import android.text.Editable;
+import android.text.TextWatcher;
+import android.view.KeyEvent;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.AdapterView;
@@ -27,9 +30,13 @@ import androidx.annotation.NonNull;
 import com.jens.automation2.Action.Action_Enum;
 
 import org.apache.commons.lang3.StringUtils;
+import org.w3c.dom.Text;
 
+import java.net.MalformedURLException;
+import java.net.URL;
 import java.util.ArrayList;
 import java.util.Map;
+import java.util.regex.Pattern;
 
 public class ActivityManageActionTriggerUrl extends Activity
 {
@@ -39,7 +46,7 @@ public class ActivityManageActionTriggerUrl extends Activity
 	CheckBox chkTriggerUrlUseAuthentication;
 	RadioButton rbTriggerUrlMethodGet, rbTriggerUrlMethodPost;
 	TableLayout tlTriggerUrlAuthentication;
-	TextView tvHttpParameterExplanation;
+	TextView tvHttpParameterExplanation, tvUrlValidator;
 	ArrayAdapter<String> httpParametersAdapter;
 
 	private ArrayList<String> httpParamsList = new ArrayList<>();
@@ -70,6 +77,7 @@ public class ActivityManageActionTriggerUrl extends Activity
 		etParameterValue = (EditText)findViewById(R.id.etParameterValue);
 		bAddHttpParam = (Button)findViewById(R.id.bAddHttpParam);
 		tvHttpParameterExplanation = (TextView)findViewById(R.id.tvHttpParameterExplanation);
+		tvUrlValidator = (TextView)findViewById(R.id.tvUrlValidator);
 
 		etParameterName.setEnabled(false);
 		etParameterValue.setEnabled(false);
@@ -173,6 +181,33 @@ public class ActivityManageActionTriggerUrl extends Activity
 		});
 		updateListView();
 
+		etTriggerUrl.addTextChangedListener(new TextWatcher()
+		{
+			@Override
+			public void afterTextChanged(Editable editable)
+			{
+				if(etTriggerUrl.getText() != null && etTriggerUrl.getText().length() > 0)
+				{
+					if(Miscellaneous.isValidUrl(etTriggerUrl.getText().toString()))
+						tvUrlValidator.setText("");
+					else
+						tvUrlValidator.setText(getResources().getString(R.string.enter_valid_url));
+				}
+			}
+
+			@Override
+			public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2)
+			{
+
+			}
+
+			@Override
+			public void onTextChanged(CharSequence charSequence, int i, int i1, int i2)
+			{
+
+			}
+		});
+
 		if(getIntent().hasExtra(ActivityManageRule.intentNameActionParameter2))
 		{
 			// username,password,URL,etc.

app/src/main/java/com/jens/automation2/Miscellaneous.java

@@ -105,6 +105,8 @@ import java.util.List;
 import java.util.Locale;
 import java.util.Map;
 import java.util.Scanner;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipInputStream;
 import java.util.zip.ZipOutputStream;
@@ -133,6 +135,9 @@ public class Miscellaneous extends Service
 	protected final static String httpMainData = "httpMainData";
 	protected final static String doNoEncodingString = "NoEncoding";
 	protected final static String httpEncoding = "UTF-8";
+	protected final static String URL_REGEX = "^(https?):\\/\\/([a-zA-Z0-9-]+(\\.[a-zA-Z0-9-]+)*)(:[0-9]{1,5})?([\\/\\?#].*)?$";
+//	protected final static String URL_REGEX = "^(https?|ftp):\\/\\/([a-zA-Z0-9-]+(\\.[a-zA-Z0-9-]+)*)(:[0-9]{1,5})?([\\/\\?#].*)?$";
+	protected final static Pattern URL_PATTERN = Pattern.compile(URL_REGEX, Pattern.CASE_INSENSITIVE);
 	public static Context startupContext;
 
 	public static final String lineSeparator = System.getProperty("line.separator");
@@ -2428,4 +2433,13 @@ public class Miscellaneous extends Service
 		StackTraceElement callingFrame = Thread.currentThread().getStackTrace()[4];
 		return callingFrame.getMethodName();
 	}
+
+	public static boolean isValidUrl(String input)
+	{
+		if (input == null || input.length() == 0)
+			return false;
+
+		Matcher matcher = URL_PATTERN.matcher(input);
+		return matcher.matches(); // Returns true if the entire string matches
+	}
 }

app/src/main/res/layout/activity_manage_action_trigger_url.xml

@@ -35,6 +35,12 @@
 
 		</EditText>
 
+		<TextView
+			android:id="@+id/tvUrlValidator"
+			android:layout_width="wrap_content"
+			android:layout_height="wrap_content"
+			android:textColor="@color/red" />
+
 		<LinearLayout
 			android:layout_width="match_parent"
 			android:layout_height="wrap_content"

app/src/main/res/values/strings.xml

@@ -979,4 +979,5 @@
     <string name="examplesWriteSecureSettings">I do not keep a list of possible settings. Please find those settings on your own. See <a href="https://developer.android.com/reference/android/provider/Settings.Secure">here</a> for some (incomplete) examples.</string>
     <string name="httpParametersExplanation">If any parameter name starts with %1$s while method is POST, it will not be transmitted like the other parameters (with key=value), but transferred as main data. If the parameter ends with %2$s, no encoding will be performed.</string>
     <string name="target">Target</string>
+    <string name="enter_valid_url">Enter a valid URL.</string>
 </resources>