Develop Reference

How to run iperf command properly in Runtime.getRuntime().exec() android

I try to run iperf server and client in my android device so i develop an app using exec() and it is working fine for ls, ping etc. command but when i try to run iperf -s i got error, Here is the code and i added internet permission in manifest file. Help will appreciate
What will be the working directory and environment for iperf command??
StringBuffer output = new StringBuffer();
Process p;
try {
p = Runtime.getRuntime().exec(command);
p.waitFor();
BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream()));
String line = "";
while ((line = reader.readLine())!= null) {
output.append(line + "\n");
}
}
I got following Error
06-14 13:14:01.023: W/System.err(1465): java.io.IOException: Error running exec(). Command: [iperf, -s] Working Directory: null Environment: null
06-14 13:14:01.033: W/System.err(1465): at java.lang.ProcessManager.exec(ProcessManager.java:211)
06-14 13:14:01.033: W/System.err(1465): at java.lang.Runtime.exec(Runtime.java:173)
06-14 13:14:01.053: W/System.err(1465): at java.lang.Runtime.exec(Runtime.java:246)
06-14 13:14:01.053: W/System.err(1465): at java.lang.Runtime.exec(Runtime.java:189)
06-14 13:14:01.053: W/System.err(1465): at com.learn2crack.androidshell.ShellExecuter.Executer(ShellExecuter.java:20)
06-14 13:14:01.053: W/System.err(1465): at com.learn2crack.androidshell.MainActivity$1.onClick(MainActivity.java:33)
06-14 13:14:01.063: W/System.err(1465): at android.view.View.performClick(View.java:4438)
06-14 13:14:01.063: W/System.err(1465): at android.view.View$PerformClick.run(View.java:18422)
06-14 13:14:01.063: W/System.err(1465): at android.os.Handler.handleCallback(Handler.java:733)
06-14 13:14:01.063: W/System.err(1465): at android.os.Handler.dispatchMessage(Handler.java:95)
06-14 13:14:01.063: W/System.err(1465): at android.os.Looper.loop(Looper.java:136)
06-14 13:14:01.073: W/System.err(1465): at android.app.ActivityThread.main(ActivityThread.java:5017)
06-14 13:14:01.073: W/System.err(1465): at java.lang.reflect.Method.invokeNative(Native Method)
06-14 13:14:01.073: W/System.err(1465): at java.lang.reflect.Method.invoke(Method.java:515)
06-14 13:14:01.083: W/System.err(1465): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
06-14 13:14:01.083: W/System.err(1465): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
06-14 13:14:01.103: W/System.err(1465): at dalvik.system.NativeStart.main(Native Method)
06-14 13:14:01.113: W/System.err(1465): Caused by: java.io.IOException: Permission denied
06-14 13:14:01.113: W/System.err(1465): at java.lang.ProcessManager.exec(Native Method)
06-14 13:14:01.113: W/System.err(1465): at java.lang.ProcessManager.exec(ProcessManager.java:209)
06-14 13:14:01.123: W/System.err(1465): ... 16 more

Sound a permissions problem check your logcat line:
Caused by: java.io.IOException: Permission denied
Maybe you can try execute a binary iperf in a external sd card? try to add permissions to read/write external storage.

Crash issue in OnResume

If application stay in background mode more then 5 min. after that i try to open Application at that time got crash issue my Error log is here help me thanks in Advance....
java.lang.RuntimeException: Unable to start activity` ComponentInfo{com.gamestruct.TweetBoostAndroid/com.gamestruct.TweetBoostAndroid.TabbedActivity}: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.gamestruct.TweetBoostAndroid/com.gamestruct.TweetBoostAndroid.EarnCoinActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2205)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2255)
at android.app.ActivityThread.access$800(ActivityThread.java:142)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1203)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5118)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:792)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:608)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.gamestruct.TweetBoostAndroid/com.gamestruct.TweetBoostAndroid.EarnCoinActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2205)
at android.app.ActivityThread.startActivityNow(ActivityThread.java:2043)
at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:135)
at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:347)
at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:749)
at android.widget.TabHost.setCurrentTab(TabHost.java:413)
at android.widget.TabHost.addTab(TabHost.java:240)
at com.gamestruct.TweetBoostAndroid.TabbedActivity.addTab(TabbedActivity.java:199)
at com.gamestruct.TweetBoostAndroid.TabbedActivity.setTabs(TabbedActivity.java:180)
at com.gamestruct.TweetBoostAndroid.TabbedActivity.onCreate(TabbedActivity.java:140)
at android.app.Activity.performCreate(Activity.java:5275)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2169)
... 11 more
Caused by: java.lang.NullPointerException
at com.gamestruct.TweetBoostAndroid.EarnCoinActivity.onCreate(EarnCoinActivity.java:110)
at android.app.Activity.performCreate(Activity.java:5275)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2169)
... 23 more

While your application stayed in the background it got killed by the system. Somewhere in com.gamestruct.TweetBoostAndroid.EarnCoinActivity.onCreate (presumably on line 110) you are using something that became null as your app was killed.

findViewById on an ImageView why does setBackgroundColor give NullPointerException

I have a very basic activity with an ImageView of android:id="#+id/imageViewTest"
and then in the OnCreate method calling:
ImageView imageView = (ImageView)findViewById(R.id.imageViewTest);
// Set the background color to white
imageView.setBackgroundColor(Color.WHITE);
this gives error:
10-15 16:36:27.552 29097-29097/org.explore.self.beginner D/dalvikvm﹕ Late-enabling CheckJNI
10-15 16:36:28.017 29097-29097/org.explore.self.beginner D/AndroidRuntime﹕ Shutting down VM
10-15 16:36:28.017 29097-29097/org.explore.self.beginner W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0x41d9b2a0)
10-15 16:36:28.042 29097-29097/org.explore.self.beginner E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{org.explore.self.beginner/org.selfexplore.android.view.activity.TestActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2110)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135)
at android.app.ActivityThread.access$700(ActivityThread.java:140)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1237)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4921)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at org.selfexplore.android.view.activity.TestActivity.onCreate(TestActivity.java:37)
at android.app.Activity.performCreate(Activity.java:5188)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2074)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135)
            at android.app.ActivityThread.access$700(ActivityThread.java:140)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1237)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:4921)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805)
            at dalvik.system.NativeStart.main(Native Method)
10-15 16:36:28.062 29097-29097/org.explore.self.beginner I/Process﹕ Sending signal. PID: 29097 SIG: 9
But when I do a
ImageView imageView = new ImageView(this);
it works fine, Why?
PS: I am not able to add the layout code here, so sharing it in this doc: https://docs.google.com/document/d/1fbi3B_hAYUh_C2IwPfInvZ-BG2bgsa4pZoJKj8NBT9o/edit?usp=sharing

Your layout you've set with setContentView() doesn't have a view with id imageViewTest and findViewById() returns null, or you haven't called setContentView() at all.

Unfortunately android application is stopped

05-10 22:12:43.572: E/dalvikvm(566): Could not find class 'com.commonsware.cwac.merge.MergeAdapter', referenced from method FXPAL.Unity.Android.UnityMain.updateView
05-10 22:12:43.862: E/dalvikvm(566): Could not find class 'com.xtify.android.sdk.PersistentLocationManager', referenced from method FXPAL.Unity.Android.ReportingService.onCreate
05-10 22:12:44.182: E/AndroidRuntime(566): FATAL EXCEPTION: main
05-10 22:12:44.182: E/AndroidRuntime(566): java.lang.NoClassDefFoundError: com.xtify.android.sdk.PersistentLocationManager
05-10 22:12:44.182: E/AndroidRuntime(566): at FXPAL.Unity.Android.ReportingService.onCreate(ReportingService.java:240)
05-10 22:12:44.182: E/AndroidRuntime(566): at android.app.ActivityThread.handleCreateService(ActivityThread.java:2253)
05-10 22:12:44.182: E/AndroidRuntime(566): at android.app.ActivityThread.access$1600(ActivityThread.java:123)
05-10 22:12:44.182: E/AndroidRuntime(566): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1201)
05-10 22:12:44.182: E/AndroidRuntime(566): at android.os.Handler.dispatchMessage(Handler.java:99)
05-10 22:12:44.182: E/AndroidRuntime(566): at android.os.Looper.loop(Looper.java:137)
05-10 22:12:44.182: E/AndroidRuntime(566): at android.app.ActivityThread.main(ActivityThread.java:4424)
05-10 22:12:44.182: E/AndroidRuntime(566): at java.lang.reflect.Method.invokeNative(Native Method)
05-10 22:12:44.182: E/AndroidRuntime(566): at java.lang.reflect.Method.invoke(Method.java:511)
05-10 22:12:44.182: E/AndroidRuntime(566): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
05-10 22:12:44.182: E/AndroidRuntime(566): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
05-10 22:12:44.182: E/AndroidRuntime(566): at dalvik.system.NativeStart.main(Native Method)
05-10 22:12:55.702: E/dalvikvm(589): Could not find class 'com.xtify.android.sdk.PersistentLocationManager', referenced from method FXPAL.Unity.Android.ReportingService.onCreate
05-10 22:12:55.992: E/AndroidRuntime(589): FATAL EXCEPTION: main
05-10 22:12:55.992: E/AndroidRuntime(589): java.lang.NoClassDefFoundError: com.xtify.android.sdk.PersistentLocationManager
05-10 22:12:55.992: E/AndroidRuntime(589): at FXPAL.Unity.Android.ReportingService.onCreate(ReportingService.java:240)
05-10 22:12:55.992: E/AndroidRuntime(589): at android.app.ActivityThread.handleCreateService(ActivityThread.java:2253)
05-10 22:12:55.992: E/AndroidRuntime(589): at android.app.ActivityThread.access$1600(ActivityThread.java:123)
05-10 22:12:55.992: E/AndroidRuntime(589): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1201)
05-10 22:12:55.992: E/AndroidRuntime(589): at android.os.Handler.dispatchMessage(Handler.java:99)
05-10 22:12:55.992: E/AndroidRuntime(589): at android.os.Looper.loop(Looper.java:137)
05-10 22:12:55.992: E/AndroidRuntime(589): at android.app.ActivityThread.main(ActivityThread.java:4424)
05-10 22:12:55.992: E/AndroidRuntime(589): at java.lang.reflect.Method.invokeNative(Native Method)
05-10 22:12:55.992: E/AndroidRuntime(589): at java.lang.reflect.Method.invoke(Method.java:511)
05-10 22:12:55.992: E/AndroidRuntime(589): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
05-10 22:12:55.992: E/AndroidRuntime(589): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
05-10 22:12:55.992: E/AndroidRuntime(589): at dalvik.system.NativeStart.main(Native Method)
05-10 22:13:01.262: E/dalvikvm(605): Could not find class 'com.commonsware.cwac.merge.MergeAdapter', referenced from method FXPAL.Unity.Android.UnityMain.updateView
05-10 22:13:01.502: E/dalvikvm(605): Could not find class 'com.xtify.android.sdk.PersistentLocationManager', referenced from method FXPAL.Unity.Android.ReportingService.onCreate
05-10 22:13:01.722: E/AndroidRuntime(605): FATAL EXCEPTION: main
05-10 22:13:01.722: E/AndroidRuntime(605): java.lang.NoClassDefFoundError: com.xtify.android.sdk.PersistentLocationManager
05-10 22:13:01.722: E/AndroidRuntime(605): at FXPAL.Unity.Android.ReportingService.onCreate(ReportingService.java:240)
05-10 22:13:01.722: E/AndroidRuntime(605): at android.app.ActivityThread.handleCreateService(ActivityThread.java:2253)
05-10 22:13:01.722: E/AndroidRuntime(605): at android.app.ActivityThread.access$1600(ActivityThread.java:123)
05-10 22:13:01.722: E/AndroidRuntime(605): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1201)
05-10 22:13:01.722: E/AndroidRuntime(605): at android.os.Handler.dispatchMessage(Handler.java:99)
05-10 22:13:01.722: E/AndroidRuntime(605): at android.os.Looper.loop(Looper.java:137)
05-10 22:13:01.722: E/AndroidRuntime(605): at android.app.ActivityThread.main(ActivityThread.java:4424)
05-10 22:13:01.722: E/AndroidRuntime(605): at java.lang.reflect.Method.invokeNative(Native Method)
05-10 22:13:01.722: E/AndroidRuntime(605): at java.lang.reflect.Method.invoke(Method.java:511)
05-10 22:13:01.722: E/AndroidRuntime(605): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
05-10 22:13:01.722: E/AndroidRuntime(605): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
05-10 22:13:01.722: E/AndroidRuntime(605): at dalvik.system.NativeStart.main(Native Method)
I am new to android development.I am upgrading an android application from 2.2 Android to 4.0.3. The application is not starting and saying "Unfortunately myUnity application has stopped", but previously the application was good.The above is the error log i am getting while I debug the application.I am also pasting my manifest file below. Please help me out guys as I am facing this problem since many days.
Thanks in advance.
Android manifest file is
-->
Thanks in advance.... i am also new to stackflow... i am really sorry if I posted the question in wrong format.
Regards,
Rakesh.
LogCat
05-15 06:52:35.898: E/dalvikvm(1436): Could not find class 'com.commonsware.cwac.merge.MergeAdapter', referenced from method FXPAL.Unity.Android.UnityMain.updateView
05-15 06:52:36.187: E/dalvikvm(1436): Could not find class 'com.xtify.android.sdk.PersistentLocationManager', referenced from method FXPAL.Unity.Android.ReportingService.onCreate
The above is my logcat. Looking forward to your help guyz. The below is my android Manifest

Well I had made changes in my Android Environment. I was using some external libraries (JARs) and I was also getting this "NoClassDef" error. I made a folder by name of "libs" copied the libraries into it. Right clicked on "libs" then buildpath -> add as source folder.
I hope this helps :)

Your problem is `
java.lang.NoClassDefFoundError: com.xtify.android.sdk.PersistentLocationManager
`
Copied from documentation:
Thrown if the Java Virtual Machine or a ClassLoader instance tries to
load in the definition of a class (as part of a normal method call or
as part of creating a new instance using the new expression) and no
definition of the class could be found. The searched-for class
definition existed when the currently executing class was compiled,
but the definition can no longer be found.
Reason of NoClassDefFoundError is that a particular class is not available in Classpath, so u need to add that into Classpath. Try it.

No apologies needed, posting the logcat is the right thing to do. The first line says "Could not find class 'com.commonsware.cwac.merge.MergeAdapter', referenced from method FXPAL.Unity.Android.UnityMain.updateView". Be sure you are still linking that package into your app.
BTW, I can't see your manifest file.

Force Close error on Android Application

I have added the Results class to the Android Manifest, so yes, you can cross that off the list.
Is it an error in the way I've set out the method?
package com.kenning.foreveralone;
import android.app.Activity;
import android.os.Bundle;
import android.widget.EditText;
import android.widget.TextView;
public class Results extends Activity{
EditText fbFriends;
TextView resulting;
String value;
#Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.rslt);
TextView resulting = (TextView) findViewById(R.id.result);
EditText fbFriends = (EditText) findViewById(R.id.noFacebookFriends);
String value = fbFriends.getText().toString();
resulting.setText("Your score is " + value);
}
}
When I start this class, it always seems to force close my app. Can anyone tell me what I'm doing wrong?
Here's the log cat:
04-08 20:05:24.169: E/AndroidRuntime(589): FATAL EXCEPTION: main
04-08 20:05:24.169: E/AndroidRuntime(589): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.kenning.foreveralone/com.kenning.foreveralone.Results}: java.lang.NullPointerException
04-08 20:05:24.169: E/AndroidRuntime(589): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
04-08 20:05:24.169: E/AndroidRuntime(589): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
04-08 20:05:24.169: E/AndroidRuntime(589): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
04-08 20:05:24.169: E/AndroidRuntime(589): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
04-08 20:05:24.169: E/AndroidRuntime(589): at android.os.Handler.dispatchMessage(Handler.java:99)
04-08 20:05:24.169: E/AndroidRuntime(589): at android.os.Looper.loop(Looper.java:123)
04-08 20:05:24.169: E/AndroidRuntime(589): at android.app.ActivityThread.main(ActivityThread.java:4627)
04-08 20:05:24.169: E/AndroidRuntime(589): at java.lang.reflect.Method.invokeNative(Native Method)
04-08 20:05:24.169: E/AndroidRuntime(589): at java.lang.reflect.Method.invoke(Method.java:521)
04-08 20:05:24.169: E/AndroidRuntime(589): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
04-08 20:05:24.169: E/AndroidRuntime(589): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
04-08 20:05:24.169: E/AndroidRuntime(589): at dalvik.system.NativeStart.main(Native Method)
04-08 20:05:24.169: E/AndroidRuntime(589): Caused by: java.lang.NullPointerException
04-08 20:05:24.169: E/AndroidRuntime(589): at com.kenning.foreveralone.Results.onCreate(Results.java:20)
04-08 20:05:24.169: E/AndroidRuntime(589): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
04-08 20:05:24.169: E/AndroidRuntime(589): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
04-08 20:05:24.169: E/AndroidRuntime(589): ... 11 more

It's a null pointer exception in onCreate, so why not try stepping through onCreate to see what variable is null?
That said, I'm guessing R.id.noFacebookFriends is not part of the R.layout.rslt.

You are getting a NullPointerException somewhere in your OnCreate. I am guessing that either the ids are wrong in your rslt.xml layout so result and fbFriends is null, or fbFriends doesn't have any text in it so getText() returns null.