I know there are tons of these on SO, but I have one more for you guys. I know I have a null pointer exception error somewhere, but I have no idea where. Java isnt my best language so I am kind of fumbling through this.
My logcat looks like this:
W/dalvikvm( 6062): threadid=1: thread exiting with uncaught exception (group=0x413e5438)
E/AndroidRuntime( 6062): FATAL EXCEPTION: main
E/AndroidRuntime( 6062): java.lang.NullPointerException
E/AndroidRuntime( 6062): at com.zach.ReportingTool.ReportingTool$1.handleMessage(ReportingTool.java:152)
E/AndroidRuntime( 6062): at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime( 6062): at android.os.Looper.loop(Looper.java:137)
E/AndroidRuntime( 6062): at android.app.ActivityThread.main(ActivityThread.java:4918)
E/AndroidRuntime( 6062): at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 6062): at java.lang.reflect.Method.invoke(Method.java:511)
E/AndroidRuntime( 6062): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1004)
E/AndroidRuntime( 6062): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:771)
E/AndroidRuntime( 6062): at dalvik.system.NativeStart.main(Native Method)
E/android.os.Debug( 714): !@Dumpstate > dumpstate -k -t -z -d -o /data/log/dumpstate_app_error
I took the code from an open source project here. The code is for a speed test application. The only thing I really changed/removed was removing an updating progress bar that was at the top of the screen that was animated and I got rid of a network textview that indicated whether the speed was 3g or edge.
to initiate the code the button looks like this:
bSpeed.setOnClickListener(new OnClickListener(){
@Override
public void onClick(final View view) {
confirmation.setText("Test started");
bSpeed.setEnabled(false);
new Thread(mWorker).start();
}
});
The rest of the code looks like this:
@SuppressLint("HandlerLeak")
private final Handler mHandler=new Handler(){
@Override
public void handleMessage(final Message msg) {
try {
switch(msg.what){
case MSG_UPDATE_STATUS:
final SpeedInfo info1=(SpeedInfo) msg.obj;
speed.setText(String.format(getResources().getString(R.string.update_speed), mDecimalFormater.format(info1.kilobits)));
progress.setText(String.format(getResources().getString(R.string.update_downloaded), msg.arg2, EXPECTED_SIZE_IN_BYTES));
break;
case MSG_UPDATE_CONNECTION_TIME:
conspeed.setText(String.format(getResources().getString(R.string.update_connectionspeed), msg.arg1));
break;
case MSG_COMPLETE_STATUS:
final SpeedInfo info2=(SpeedInfo) msg.obj;
speed.setText(String.format(getResources().getString(R.string.update_downloaded_complete), msg.arg1, info2.kilobits));
progress.setText(String.format(getResources().getString(R.string.update_downloaded), msg.arg1, EXPECTED_SIZE_IN_BYTES));
bSpeed.setEnabled(true);
break;
default:
super.handleMessage(msg);
}
} catch (Exception e) {confirmation.setText("6: " + e.getMessage());}
}
};
private final Runnable mWorker=new Runnable(){
@Override
public void run() {
InputStream stream=null;
try {
int bytesIn=0;
String downloadFileUrl="http://www.gregbugaj.com/wp-content/uploads/2009/03/dummy.txt";
long startCon=System.currentTimeMillis();
URL url=new URL(downloadFileUrl);
URLConnection con=url.openConnection();
con.setUseCaches(false);
long connectionLatency=System.currentTimeMillis()- startCon;
stream=con.getInputStream();
Message msgUpdateConnection=Message.obtain(mHandler, MSG_UPDATE_CONNECTION_TIME);
msgUpdateConnection.arg1=(int) connectionLatency;
mHandler.sendMessage(msgUpdateConnection);
long start=System.currentTimeMillis();
int currentByte=0;
long updateStart=System.currentTimeMillis();
long updateDelta=0;
int bytesInThreshold=0;
while((currentByte=stream.read())!=-1){
bytesIn++;
bytesInThreshold++;
if(updateDelta>=UPDATE_THRESHOLD){
int progress=(int)((bytesIn/(double)EXPECTED_SIZE_IN_BYTES)*100);
Message msg=Message.obtain(mHandler, MSG_UPDATE_STATUS, calculate(updateDelta, bytesInThreshold));
msg.arg1=progress;
msg.arg2=bytesIn;
mHandler.sendMessage(msg);
//Reset
updateStart=System.currentTimeMillis();
bytesInThreshold=0;
}
updateDelta = System.currentTimeMillis()- updateStart;
}
long downloadTime=(System.currentTimeMillis()-start);
if(downloadTime==0){
downloadTime=1;
}
Message msg=Message.obtain(mHandler, MSG_COMPLETE_STATUS, calculate(downloadTime, bytesIn));
msg.arg1=bytesIn;
mHandler.sendMessage(msg);
}
catch (MalformedURLException e) {
confirmation.setText("1: " + e.getMessage());
} catch (Exception e) {
confirmation.setText("2: " + e.getMessage());
}finally{
try {
if(stream!=null){
stream.close();
}
} catch (Exception e) {
confirmation.setText("3: " + e.getMessage());
}
}
}
};
private SpeedInfo calculate(final long downloadTime, final long bytesIn){
SpeedInfo info=new SpeedInfo();
long bytespersecond =(bytesIn / downloadTime) * 1000;
double kilobits=bytespersecond * BYTE_TO_KILOBIT;
double megabits=kilobits * KILOBIT_TO_MEGABIT;
info.downspeed=bytespersecond;
info.kilobits=kilobits;
info.megabits=megabits;
return info;
}
private static class SpeedInfo{
public double kilobits=0;
public double megabits=0;
public double downspeed=0;
}
private static final int EXPECTED_SIZE_IN_BYTES = 1048576;
private static final double BYTE_TO_KILOBIT = 0.0078125;
private static final double KILOBIT_TO_MEGABIT = 0.0009765625;
private Button bSpeed;
private TextView conspeed;
private TextView progress;
private TextView speed;
private TextView confirmation;
private final int MSG_UPDATE_STATUS=0;
private final int MSG_UPDATE_CONNECTION_TIME=1;
private final int MSG_COMPLETE_STATUS=2;
private final static int UPDATE_THRESHOLD=300;
private DecimalFormat mDecimalFormater;
}
Where I think the error is coming from, is the objects in the case statement. (ReportingTool.java:152) points to this line:
conspeed.setText(String.format(getResources().getString(R.string.update_connectionspeed), msg.arg1));
If i comment that line out, it then points to the progress.setText() above that line in the previous case statement. Ignore all the try/catch blocks, I was just trying to narrow down where the error was coming from.
If anyone could take a look at this code it would be greatly appreciated, Thanks -Z
UPDATE
Thank you guys for the quick responses. After debugging that line and the ones around it, it looks like conspeed, speed, and progress are all returning with null values, am I not initiating them right?
To initiate I updated everything to match this in the "oncreate":
TextView speed = (TextView) findViewById(R.id.speed);
TextView progress = (TextView) findViewById(R.id.progress);
TextView connectionspeed = (TextView)findViewById(R.id.connectionspeed);
so now line 152 is connectionspeed.setText()
UPDATE 2
Here is the Main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/textView3"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<TextView
android:id="@+id/progress"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/bSip"
android:layout_marginTop="16dp"
android:text="@string/progress" />
<Button
android:id="@+id/bSip"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="29dp"
android:text="@string/EnableSip" />
<TextView
android:id="@+id/speed"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/progress"
android:text="@string/Speed"/>
<TextView
android:id="@+id/connectionspeed"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/speed"
android:text="@string/ConSpeed"/>
<Button
android:id="@+id/bSpeed"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/progress"
android:layout_alignParentRight="true"
android:layout_marginRight="30dp"
android:text="@string/SpeedTest" />
<TextView
android:id="@+id/Confirmation"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/bmail"
android:layout_marginTop="22dp"
android:fitsSystemWindows="true"
android:maxLines="@integer/MaxLines"
android:scrollHorizontally="false"
android:visibility="visible" />
<Button
android:id="@+id/bmail"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/connectionspeed"
android:layout_centerHorizontal="true"
android:layout_marginTop="33dp"
android:text="@string/Export" />
<Button
android:id="@+id/bDelete"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/bmail"
android:layout_alignParentBottom="true"
android:text="@string/deleteSelf" />
Thanks Again -Z
