Here is the error message:
01-25 20:42:42.139: E/AndroidRuntime(1307): FATAL EXCEPTION: main 01-25 20:42:42.139: E/AndroidRuntime(1307): java.lang.IllegalStateException: Could not execute method of the activity 01-25 20:42:42.139: E/AndroidRuntime(1307): at android.view.View$1.onClick(View.java:3597) 01-25 20:42:42.139: E/AndroidRuntime(1307): at android.view.View.performClick(View.java:4202) 01-25 20:42:42.139: E/AndroidRuntime(1307): at android.view.View$PerformClick.run(View.java:17340) 01-25 20:42:42.139: E/AndroidRuntime(1307): at android.os.Handler.handleCallback(Handler.java:725) 01-25 20:42:42.139: E/AndroidRuntime(1307): at android.os.Handler.dispatchMessage(Handler.java:92) 01-25 20:42:42.139: E/AndroidRuntime(1307): at android.os.Looper.loop(Looper.java:137) 01-25 20:42:42.139: E/AndroidRuntime(1307): at android.app.ActivityThread.main(ActivityThread.java:5191) 01-25 20:42:42.139: E/AndroidRuntime(1307): at java.lang.reflect.Method.invokeNative(Native Method) 01-25 20:42:42.139: E/AndroidRuntime(1307): at java.lang.reflect.Method.invoke(Method.java:511) 01-25 20:42:42.139: E/AndroidRuntime(1307): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795) 01-25 20:42:42.139: E/AndroidRuntime(1307): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562) 01-25 20:42:42.139: E/AndroidRuntime(1307): at dalvik.system.NativeStart.main(Native Method) 01-25 20:42:42.139: E/AndroidRuntime(1307): Caused by: java.lang.reflect.InvocationTargetException 01-25 20:42:42.139: E/AndroidRuntime(1307): at java.lang.reflect.Method.invokeNative(Native Method) 01-25 20:42:42.139: E/AndroidRuntime(1307): at java.lang.reflect.Method.invoke(Method.java:511) 01-25 20:42:42.139: E/AndroidRuntime(1307): at android.view.View$1.onClick(View.java:3592) 01-25 20:42:42.139: E/AndroidRuntime(1307): ... 11 more 01-25 20:42:42.139: E/AndroidRuntime(1307): Caused by: java.lang.NullPointerException 01-25 20:42:42.139: E/AndroidRuntime(1307): at com.seven.up.MainActivity.OnClickPort(MainActivity.java:77) 01-25 20:42:42.139: E/AndroidRuntime(1307): ... 14 more 01-25 20:44:42.549: E/MPL-storeload(511): calData from inv_save_mpl_states, size=2 01-25 20:45:39.759: E/InputDispatcher(511): channel '41b55368 com.seven.up/com.seven.up.MainActivity (server)' ~ Channel is unrecoverably broken and will be disposed! 01-25 20:45:50.279: E/AndroidRuntime(1625): FATAL EXCEPTION: main 01-25 20:45:50.279: E/AndroidRuntime(1625): java.lang.IllegalStateException: Could not execute method of the activity 01-25 20:45:50.279: E/AndroidRuntime(1625): at android.view.View$1.onClick(View.java:3597) 01-25 20:45:50.279: E/AndroidRuntime(1625): at android.view.View.performClick(View.java:4202) 01-25 20:45:50.279: E/AndroidRuntime(1625): at android.view.View$PerformClick.run(View.java:17340) 01-25 20:45:50.279: E/AndroidRuntime(1625): at android.os.Handler.handleCallback(Handler.java:725) 01-25 20:45:50.279: E/AndroidRuntime(1625): at android.os.Handler.dispatchMessage(Handler.java:92) 01-25 20:45:50.279: E/AndroidRuntime(1625): at android.os.Looper.loop(Looper.java:137) 01-25 20:45:50.279: E/AndroidRuntime(1625): at android.app.ActivityThread.main(ActivityThread.java:5191) 01-25 20:45:50.279: E/AndroidRuntime(1625): at java.lang.reflect.Method.invokeNative(Native Method) 01-25 20:45:50.279: E/AndroidRuntime(1625): at java.lang.reflect.Method.invoke(Method.java:511) 01-25 20:45:50.279: E/AndroidRuntime(1625): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795) 01-25 20:45:50.279: E/AndroidRuntime(1625): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562) 01-25 20:45:50.279: E/AndroidRuntime(1625): at dalvik.system.NativeStart.main(Native Method) 01-25 20:45:50.279: E/AndroidRuntime(1625): Caused by: java.lang.reflect.InvocationTargetException 01-25 20:45:50.279: E/AndroidRuntime(1625): at java.lang.reflect.Method.invokeNative(Native Method) 01-25 20:45:50.279: E/AndroidRuntime(1625): at java.lang.reflect.Method.invoke(Method.java:511) 01-25 20:45:50.279: E/AndroidRuntime(1625): at android.view.View$1.onClick(View.java:3592) 01-25 20:45:50.279: E/AndroidRuntime(1625): ... 11 more 01-25 20:45:50.279: E/AndroidRuntime(1625): Caused by: java.lang.NullPointerException 01-25 20:45:50.279: E/AndroidRuntime(1625): at com.seven.up.MainActivity.OnClickPort(MainActivity.java:78) 01-25 20:45:50.279: E/AndroidRuntime(1625): ... 14 more 01-25 20:46:32.409: E/InputDispatcher(511): channel '416e8e78 com.seven.up/com.seven.up.MainActivity (server)' ~ Channel is unrecoverably broken and will be disposed! 01-25 20:46:35.449: E/AndroidRuntime(1830): FATAL EXCEPTION: main 01-25 20:46:35.449: E/AndroidRuntime(1830): java.lang.IllegalStateException: Could not execute method of the activity 01-25 20:46:35.449: E/AndroidRuntime(1830): at android.view.View$1.onClick(View.java:3597) 01-25 20:46:35.449: E/AndroidRuntime(1830): at android.view.View.performClick(View.java:4202) 01-25 20:46:35.449: E/AndroidRuntime(1830): at android.view.View$PerformClick.run(View.java:17340) 01-25 20:46:35.449: E/AndroidRuntime(1830): at android.os.Handler.handleCallback(Handler.java:725) 01-25 20:46:35.449: E/AndroidRuntime(1830): at android.os.Handler.dispatchMessage(Handler.java:92) 01-25 20:46:35.449: E/AndroidRuntime(1830): at android.os.Looper.loop(Looper.java:137) 01-25 20:46:35.449: E/AndroidRuntime(1830): at android.app.ActivityThread.main(ActivityThread.java:5191) 01-25 20:46:35.449: E/AndroidRuntime(1830): at java.lang.reflect.Method.invokeNative(Native Method) 01-25 20:46:35.449: E/AndroidRuntime(1830): at java.lang.reflect.Method.invoke(Method.java:511) 01-25 20:46:35.449: E/AndroidRuntime(1830): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795) 01-25 20:46:35.449: E/AndroidRuntime(1830): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562) 01-25 20:46:35.449: E/AndroidRuntime(1830): at dalvik.system.NativeStart.main(Native Method) 01-25 20:46:35.449: E/AndroidRuntime(1830): Caused by: java.lang.reflect.InvocationTargetException 01-25 20:46:35.449: E/AndroidRuntime(1830): at java.lang.reflect.Method.invokeNative(Native Method) 01-25 20:46:35.449: E/AndroidRuntime(1830): at java.lang.reflect.Method.invoke(Method.java:511) 01-25 20:46:35.449: E/AndroidRuntime(1830): at android.view.View$1.onClick(View.java:3592) 01-25 20:46:35.449: E/AndroidRuntime(1830): ... 11 more 01-25 20:46:35.449: E/AndroidRuntime(1830): Caused by: java.lang.NullPointerException 01-25 20:46:35.449: E/AndroidRuntime(1830): at com.seven.up.MainActivity.OnClickPort(MainActivity.java:77) 01-25 20:46:35.449: E/AndroidRuntime(1830): ... 14 more 01-25 20:47:40.119: E/AndroidRuntime(2009): FATAL EXCEPTION: main 01-25 20:47:40.119: E/AndroidRuntime(2009): java.lang.IllegalStateException: Could not execute method of the activity 01-25 20:47:40.119: E/AndroidRuntime(2009): at android.view.View$1.onClick(View.java:3597) 01-25 20:47:40.119: E/AndroidRuntime(2009): at android.view.View.performClick(View.java:4202) 01-25 20:47:40.119: E/AndroidRuntime(2009): at android.view.View$PerformClick.run(View.java:17340) 01-25 20:47:40.119: E/AndroidRuntime(2009): at android.os.Handler.handleCallback(Handler.java:725) 01-25 20:47:40.119: E/AndroidRuntime(2009): at android.os.Handler.dispatchMessage(Handler.java:92) 01-25 20:47:40.119: E/AndroidRuntime(2009): at android.os.Looper.loop(Looper.java:137) 01-25 20:47:40.119: E/AndroidRuntime(2009): at android.app.ActivityThread.main(ActivityThread.java:5191) 01-25 20:47:40.119: E/AndroidRuntime(2009): at java.lang.reflect.Method.invokeNative(Native Method) 01-25 20:47:40.119: E/AndroidRuntime(2009): at java.lang.reflect.Method.invoke(Method.java:511) 01-25 20:47:40.119: E/AndroidRuntime(2009): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795) 01-25 20:47:40.119: E/AndroidRuntime(2009): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562) 01-25 20:47:40.119: E/AndroidRuntime(2009): at dalvik.system.NativeStart.main(Native Method) 01-25 20:47:40.119: E/AndroidRuntime(2009): Caused by: java.lang.reflect.InvocationTargetException 01-25 20:47:40.119: E/AndroidRuntime(2009): at java.lang.reflect.Method.invokeNative(Native Method) 01-25 20:47:40.119: E/AndroidRuntime(2009): at java.lang.reflect.Method.invoke(Method.java:511) 01-25 20:47:40.119: E/AndroidRuntime(2009): at android.view.View$1.onClick(View.java:3592) 01-25 20:47:40.119: E/AndroidRuntime(2009): ... 11 more 01-25 20:47:40.119: E/AndroidRuntime(2009): Caused by: java.lang.NullPointerException 01-25 20:47:40.119: E/AndroidRuntime(2009): at com.seven.up.MainActivity.OnClickPort(MainActivity.java:77) 01-25 20:47:40.119: E/AndroidRuntime(2009): ... 14 more 01-25 20:49:29.979: E/InputDispatcher(511): channel '414e7770 com.seven.up/com.seven.up.MainActivity (server)' ~ Channel is unrecoverably broken and will be disposed! 01-25 20:49:30.149: E/jdwp(2216): Failed sending reply to debugger: Broken pipe 01-25 20:49:41.599: E/MPL-storeload(511): calData from inv_save_mpl_states, size=2 01-25 20:50:12.539: E/InputDispatcher(511): channel '41c0a160 com.seven.up/com.seven.up.MainActivity (server)' ~ Channel is unrecoverably broken and will be disposed! 01-25 20:50:13.629: E/InputManager-JNI(511): An exception was thrown by callback 'interceptKeyBeforeQueueing'. 01-25 20:50:13.629: E/InputManager-JNI(511): java.lang.NullPointerException 01-25 20:50:13.629: E/InputManager-JNI(511): at com.android.internal.policy.impl.PhoneWindowManager.interceptKeyBeforeQueueing(PhoneWindowManager.java:3948) 01-25 20:50:13.629: E/InputManager-JNI(511): at com.android.server.wm.InputMonitor.interceptKeyBeforeQueueing(InputMonitor.java:337) 01-25 20:50:13.629: E/InputManager-JNI(511): at com.android.server.input.InputManagerService.interceptKeyBeforeQueueing(InputManagerService.java:1346) 01-25 20:50:13.629: E/InputManager-JNI(511): at dalvik.system.NativeStart.run(Native Method) 01-25 20:50:13.899: E/InputManager-JNI(511): An exception was thrown by callback 'interceptKeyBeforeQueueing'. 01-25 20:50:13.899: E/InputManager-JNI(511): java.lang.NullPointerException 01-25 20:50:13.899: E/InputManager-JNI(511): at com.android.internal.policy.impl.PhoneWindowManager.interceptKeyBeforeQueueing(PhoneWindowManager.java:3948) 01-25 20:50:13.899: E/InputManager-JNI(511): at com.android.server.wm.InputMonitor.interceptKeyBeforeQueueing(InputMonitor.java:337) 01-25 20:50:13.899: E/InputManager-JNI(511): at com.android.server.input.InputManagerService.interceptKeyBeforeQueueing(InputManagerService.java:1346) 01-25 20:50:13.899: E/InputManager-JNI(511): at dalvik.system.NativeStart.run(Native Method) 01-25 20:50:19.759: E/InputDispatcher(511): channel '41419b38 com.seven.up/com.seven.up.MainActivity (server)' ~ Channel is unrecoverably broken and will be disposed! 01-25 20:51:49.459: E/WeatherXmlParser(2522): Couldn't parse Yahoo weather XML 01-25 20:51:49.459: E/WeatherXmlParser(2522): java.lang.NumberFormatException: Invalid float: "" 01-25 20:51:49.459: E/WeatherXmlParser(2522): at java.lang.StringToReal.invalidReal(StringToReal.java:63) 01-25 20:51:49.459: E/WeatherXmlParser(2522): at java.lang.StringToReal.parseFloat(StringToReal.java:289) 01-25 20:51:49.459: E/WeatherXmlParser(2522): at java.lang.Float.parseFloat(Float.java:300) 01-25 20:51:49.459: E/WeatherXmlParser(2522): at com.cyanogenmod.lockclock.weather.WeatherXmlParser.getFloatForAttribute(WeatherXmlParser.java:86) 01-25 20:51:49.459: E/WeatherXmlParser(2522): at com.cyanogenmod.lockclock.weather.WeatherXmlParser.parseWeatherResponse(WeatherXmlParser.java:108) 01-25 20:51:49.459: E/WeatherXmlParser(2522): at com.cyanogenmod.lockclock.weather.WeatherUpdateService$WeatherUpdateTask.doInBackground(WeatherUpdateService.java:210) 01-25 20:51:49.459: E/WeatherXmlParser(2522): at com.cyanogenmod.lockclock.weather.WeatherUpdateService$WeatherUpdateTask.doInBackground(WeatherUpdateService.java:126) 01-25 20:51:49.459: E/WeatherXmlParser(2522): at android.os.AsyncTask$2.call(AsyncTask.java:287) 01-25 20:51:49.459: E/WeatherXmlParser(2522): at java.util.concurrent.FutureTask.run(FutureTask.java:234) 01-25 20:51:49.459: E/WeatherXmlParser(2522): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230) 01-25 20:51:49.459: E/WeatherXmlParser(2522): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080) 01-25 20:51:49.459: E/WeatherXmlParser(2522): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573) 01-25 20:51:49.459: E/WeatherXmlParser(2522): at java.lang.Thread.run(Thread.java:856) 01-25 20:52:24.619: E/MPL-storeload(511): calData from inv_save_mpl_states, size=2 01-25 20:57:07.229: E/AndroidRuntime(2410): FATAL EXCEPTION: main 01-25 20:57:07.229: E/AndroidRuntime(2410): java.lang.IllegalStateException: Could not execute method of the activity 01-25 20:57:07.229: E/AndroidRuntime(2410): at android.view.View$1.onClick(View.java:3597) 01-25 20:57:07.229: E/AndroidRuntime(2410): at android.view.View.performClick(View.java:4202) 01-25 20:57:07.229: E/AndroidRuntime(2410): at android.view.View$PerformClick.run(View.java:17340) 01-25 20:57:07.229: E/AndroidRuntime(2410): at android.os.Handler.handleCallback(Handler.java:725) 01-25 20:57:07.229: E/AndroidRuntime(2410): at android.os.Handler.dispatchMessage(Handler.java:92) 01-25 20:57:07.229: E/AndroidRuntime(2410): at android.os.Looper.loop(Looper.java:137) 01-25 20:57:07.229: E/AndroidRuntime(2410): at android.app.ActivityThread.main(ActivityThread.java:5191) 01-25 20:57:07.229: E/AndroidRuntime(2410): at java.lang.reflect.Method.invokeNative(Native Method) 01-25 20:57:07.229: E/AndroidRuntime(2410): at java.lang.reflect.Method.invoke(Method.java:511) 01-25 20:57:07.229: E/AndroidRuntime(2410): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795) 01-25 20:57:07.229: E/AndroidRuntime(2410): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562) 01-25 20:57:07.229: E/AndroidRuntime(2410): at dalvik.system.NativeStart.main(Native Method) 01-25 20:57:07.229: E/AndroidRuntime(2410): Caused by: java.lang.reflect.InvocationTargetException 01-25 20:57:07.229: E/AndroidRuntime(2410): at java.lang.reflect.Method.invokeNative(Native Method) 01-25 20:57:07.229: E/AndroidRuntime(2410): at java.lang.reflect.Method.invoke(Method.java:511) 01-25 20:57:07.229: E/AndroidRuntime(2410): at android.view.View$1.onClick(View.java:3592) 01-25 20:57:07.229: E/AndroidRuntime(2410): ... 11 more 01-25 20:57:07.229: E/AndroidRuntime(2410): Caused by: java.lang.NullPointerException 01-25 20:57:07.229: E/AndroidRuntime(2410): at com.seven.up.MainActivity.OnClickPort(MainActivity.java:77) 01-25 20:57:07.229: E/AndroidRuntime(2410): ... 14 more 01-25 20:59:12.549: E/AndroidRuntime(3168): FATAL EXCEPTION: main 01-25 20:59:12.549: E/AndroidRuntime(3168): java.lang.IllegalStateException: Could not execute method of the activity 01-25 20:59:12.549: E/AndroidRuntime(3168): at android.view.View$1.onClick(View.java:3597) 01-25 20:59:12.549: E/AndroidRuntime(3168): at android.view.View.performClick(View.java:4202) 01-25 20:59:12.549: E/AndroidRuntime(3168): at android.view.View$PerformClick.run(View.java:17340) 01-25 20:59:12.549: E/AndroidRuntime(3168): at android.os.Handler.handleCallback(Handler.java:725) 01-25 20:59:12.549: E/AndroidRuntime(3168): at android.os.Handler.dispatchMessage(Handler.java:92) 01-25 20:59:12.549: E/AndroidRuntime(3168): at android.os.Looper.loop(Looper.java:137) 01-25 20:59:12.549: E/AndroidRuntime(3168): at android.app.ActivityThread.main(ActivityThread.java:5191) 01-25 20:59:12.549: E/AndroidRuntime(3168): at java.lang.reflect.Method.invokeNative(Native Method) 01-25 20:59:12.549: E/AndroidRuntime(3168): at java.lang.reflect.Method.invoke(Method.java:511) 01-25 20:59:12.549: E/AndroidRuntime(3168): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795) 01-25 20:59:12.549: E/AndroidRuntime(3168): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562) 01-25 20:59:12.549: E/AndroidRuntime(3168): at dalvik.system.NativeStart.main(Native Method) 01-25 20:59:12.549: E/AndroidRuntime(3168): Caused by: java.lang.reflect.InvocationTargetException 01-25 20:59:12.549: E/AndroidRuntime(3168): at java.lang.reflect.Method.invokeNative(Native Method) 01-25 20:59:12.549: E/AndroidRuntime(3168): at java.lang.reflect.Method.invoke(Method.java:511) 01-25 20:59:12.549: E/AndroidRuntime(3168): at android.view.View$1.onClick(View.java:3592) 01-25 20:59:12.549: E/AndroidRuntime(3168): ... 11 more 01-25 20:59:12.549: E/AndroidRuntime(3168): Caused by: java.lang.NullPointerException 01-25 20:59:12.549: E/AndroidRuntime(3168): at com.seven.up.MainActivity.OnClickPort(MainActivity.java:76) 01-25 20:59:12.549: E/AndroidRuntime(3168): ... 14 more 01-25 21:01:13.939: E/MPL-storeload(511): calData from inv_save_mpl_states, size=2
Here is my code:
package com.seven.up; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.net.*; import android.app.Activity; import android.os.Bundle; import android.text.Editable; import android.view.Menu; import android.view.MenuInflater; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends Activity implements OnClickListener { EditText ip_address_field; TextView scan_out; TextView port_results; EditText startPort; EditText stopPort; protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ip_address_field = (EditText) findViewById(R.id.ip_address_field); ip_address_field.getText(); scan_out = (TextView) findViewById(R.id.scan_out); Button scan_button = (Button) findViewById(R.id.scan_button); scan_button.setOnClickListener(this); } public void onClick(View v) { Editable host = ip_address_field.getText(); switch (v.getId()) { case R.id.scan_button: try { String pingCmd = "ping -c 5 " + host; String pingResult = ""; Runtime r = Runtime.getRuntime(); Process p = r.exec(pingCmd); BufferedReader in = new BufferedReader(new InputStreamReader( p.getInputStream())); String inputLine; while ((inputLine = in.readLine()) != null) { System.out.println(inputLine); scan_out.setText(inputLine + "\n" + "\n"); pingResult += inputLine; scan_out.setText("/n" + pingResult); } in.close(); }// try catch (IOException e) { System.out.println(e); } break; default: break; } } public void OnClickPort(View v) { switch (v.getId()) { case R.id.button1: int startPortRange = Integer.parseInt(startPort.getText().toString()); int stopPortRange = Integer.parseInt(stopPort.getText().toString()); for (int i = startPortRange; i <= stopPortRange; i++) { try { Socket ServerSok = new Socket("192.168.0.1", i); Toast.makeText(getApplicationContext(), "Port in use: " + i, Toast.LENGTH_LONG).show(); ServerSok.close(); } catch (Exception e) { } System.out.println("Port not in use: " + i); } } } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.activity_main, menu); return super.onCreateOptionsMenu(menu); } }
How to Solve this error:
Method 1:
This line throws one NPEand IllegalStateExceptionproduces one in the exception chain:
int stopPortRange = Integer.parseInt(stopPort.getText().toString());
Because you did not initialize stopPort(or startPort) in your onCreatemethod. You should have something like this:
stopPort = (EditText) findViewById(R.id.stop_port_field);
statement
EditText stopPort;
Just declare the nulldefault variables. Only instantiated instances can call their methods.
Method 2:
EditText startPort, stopPort;
Just declare variables. This will not initialize the value of these declared variables. Therefore, the value of these variables is currently’null’.
stopPort = (EditText) findViewById (R.id.stop_port_field)
Initialize (or bind stopPort to the UI component in your way) the value of stopPort so as to avoid NullPointerException (which in turn leads to IllegalStatementException in your case).