I have an ArrayList of Path values. I need to convert it into String values and know what all coordinates were covered in the Path. Here's the code that I worked up:
private ArrayList<Path> pointsToDraw = new ArrayList<Path>(); private List<String> stringPoints ; synchronized(pointsToDraw){ for(Path path : pointsToDraw) { stringPoints.add(String.valueOf(path)); } TextView b1Text = (TextView) findViewById(R.id.GText); for(String s : stringPoints) { b1Text.setText(s); } } I get an exception during runtime. The following is the log content :
02-21 18:18:29.323: E/AndroidRuntime(512): FATAL EXCEPTION: main 02-21 18:18:29.323: E/AndroidRuntime(512): java.lang.NullPointerException 02-21 18:18:29.323: E/AndroidRuntime(512): at learn.myandroidapp.hr.HRCanvas$1.onClick(HRCanvas.java:78) 02-21 18:18:29.323: E/AndroidRuntime(512): at android.view.View.performClick(View.java:3511) 02-21 18:18:29.323: E/AndroidRuntime(512): at android.view.View$PerformClick.run(View.java:14105) 02-21 18:18:29.323: E/AndroidRuntime(512): at android.os.Handler.handleCallback(Handler.java:605) 02-21 18:18:29.323: E/AndroidRuntime(512): at android.os.Handler.dispatchMessage(Handler.java:92) 02-21 18:18:29.323: E/AndroidRuntime(512): at android.os.Looper.loop(Looper.java:137) 02-21 18:18:29.323: E/AndroidRuntime(512): at android.app.ActivityThread.main(ActivityThread.java:4424) 02-21 18:18:29.323: E/AndroidRuntime(512): at java.lang.reflect.Method.invokeNative(Native Method) 02-21 18:18:29.323: E/AndroidRuntime(512): at java.lang.reflect.Method.invoke(Method.java:511) 02-21 18:18:29.323: E/AndroidRuntime(512): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 02-21 18:18:29.323: E/AndroidRuntime(512): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 02-21 18:18:29.323: E/AndroidRuntime(512): at dalvik.system.NativeStart.main(Native Method) Where am I going wrong? Please help!
