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POimage display using JSON webservice into dynamic gridview
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  1. POimage display using JSON webservice into dynamic gridview
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    copied!<p>iam trying to get images from json URL to display them in a dynamic grid,</p> <p>My Android version is:4.2</p> <p>output:Unfortunately the Application has been stopped.</p> <pre><code>public class FreeCategory extends Activity { public String[] mThumbs=null; private Context mContext; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_free_category); Intent intent=getIntent(); Intent intent2=getIntent(); final GridView gridview=(GridView) findViewById(R.id.grid_view); gridview.setAdapter(new ImageAdapter(this)); } public class ImageAdapter extends BaseAdapter { protected String getASCIIContentFromEntity(HttpEntity entity) throws IllegalStateException, IOException { InputStream in = entity.getContent(); StringBuffer out = new StringBuffer(); int n = 1; while (n&gt;0) { byte[] b = new byte[4096]; n = in.read(b); if (n&gt;0) out.append(new String(b, 0, n)); } return out.toString(); } protected void doInBackground(Void... params) { HttpClient httpClient = new DefaultHttpClient(); HttpContext localContext = new BasicHttpContext(); HttpGet httpGet = new HttpGet( My URL); String text = null; String result = null; String name=null; String id=null; try { HttpResponse response = httpClient.execute(httpGet, localContext); HttpEntity entity = response.getEntity(); text = getASCIIContentFromEntity(entity); response.getEntity().getContent() ); text=text.replaceAll("&amp;lt;", "&lt;").replace("&amp;gt;", "&gt;"); int start=text.indexOf("&lt;message&gt;"); start=start+9; int end=text.indexOf("&lt;/message&gt;"); text=text.substring(start, end); JSONArray ja = new JSONArray(text) ; int n = ja.length(); for (int i = 0; i &lt; n; i++) { JSONObject jo = ja.getJSONObject(i); mThumbs[i]=jo.getString("SubCatImage"); name= jo.getString("SubcatName"); //.split(",").toString(); id= jo.getString("Subcatid"); } } catch (Exception e) { e.getLocalizedMessage(); } } public ImageAdapter(Context c){ mContext = c; } public int getCount() { // TODO Auto-generated method stub return mThumbs.length; } public Object getItem(int position) { // TODO Auto-generated method stub return mThumbs[position]; } public long getItemId(int position) { return 0; } public View getView(int position, View convertView, ViewGroup parent) { // TODO Auto-generated method stub ImageView imageView; if (convertView == null) { imageView = new ImageView(mContext); imageView.setLayoutParams(new GridView.LayoutParams(85, 85)); imageView.setScaleType(ImageView.ScaleType.CENTER_CROP); imageView.setPadding(8, 8, 8, 8); } else { imageView = (ImageView) convertView; } imageView.setImageURI(Uri.parse(mThumbs[position])); return imageView; } } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.activity_free_category, menu); return true; }} </code></pre> <p>Log file:</p> <pre><code> 02-13 18:38:51.359: D/dalvikvm(704): Not late-enabling CheckJNI (already on) 02-13 18:38:53.399: D/dalvikvm(704): GC_FOR_ALLOC freed 47K, 3% free 9961K/10179K, paused 72ms 02-13 18:38:53.429: I/dalvikvm-heap(704): Grow heap (frag case) to 12.753MB for 3085244-byte allocation 02-13 18:38:53.529: D/dalvikvm(704): GC_CONCURRENT freed 1K, 3% free 12973K/13255K, paused 6ms+16ms 02-13 18:38:53.980: D/dalvikvm(704): GC_FOR_ALLOC freed &lt;1K, 3% free 12973K/13255K, paused 48ms 02-13 18:38:54.059: I/dalvikvm-heap(704): Grow heap (frag case) to 19.377MB for 6947096-byte allocation 02-13 18:38:54.189: D/dalvikvm(704): GC_CONCURRENT freed 0K, 2% free 19758K/20103K, paused 10ms+6ms 02-13 18:38:55.059: D/gralloc_goldfish(704): Emulator without GPU emulation detected. 02-13 18:38:55.190: W/TextLayoutCache(704): computeValuesWithHarfbuzz -- need to force to single run 02-13 18:41:11.760: D/dalvikvm(704): GC_FOR_ALLOC freed 3353K, 17% free 17299K/20743K, paused 51ms 02-13 18:41:11.799: I/dalvikvm-heap(704): Grow heap (frag case) to 19.922MB for 3088320-byte allocation 02-13 18:41:11.981: D/dalvikvm(704): GC_FOR_ALLOC freed 6K, 15% free 20309K/23815K, paused 79ms 02-13 18:41:12.099: D/dalvikvm(704): GC_CONCURRENT freed 1K, 15% free 20308K/23815K, paused 10ms+6ms 02-13 18:41:12.449: D/dalvikvm(704): GC_FOR_ALLOC freed 25K, 15% free 20282K/23815K, paused 55ms 02-13 18:41:12.519: I/dalvikvm-heap(704): Grow heap (frag case) to 26.520MB for 6951712-byte allocation 02-13 18:41:12.649: D/dalvikvm(704): GC_CONCURRENT freed 0K, 12% free 27071K/30663K, paused 6ms+9ms 02-13 18:41:13.839: W/TextLayoutCache(704): computeValuesWithHarfbuzz -- need to force to single run 02-13 18:41:50.869: D/AndroidRuntime(704): Shutting down VM 02-13 18:41:50.892: W/dalvikvm(704): threadid=1: thread exiting with uncaught exception (group=0x409961f8) 02-13 18:41:50.919: E/AndroidRuntime(704): FATAL EXCEPTION: main 02-13 18:41:50.919: E/AndroidRuntime(704): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.erpsecurity/com.example.erpsecurity.FreeCategory}: java.lang.NullPointerException 02-13 18:41:50.919: E/AndroidRuntime(704): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1955) 02-13 18:41:50.919: E/AndroidRuntime(704): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980) 02-13 18:41:50.919: E/AndroidRuntime(704): at android.app.ActivityThread.access$600(ActivityThread.java:122) 02-13 18:41:50.919: E/AndroidRuntime(704): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146) 02-13 18:41:50.919: E/AndroidRuntime(704): at android.os.Handler.dispatchMessage(Handler.java:99) 02-13 18:41:50.919: E/AndroidRuntime(704): at android.os.Looper.loop(Looper.java:137) 02-13 18:41:50.919: E/AndroidRuntime(704): at android.app.ActivityThread.main(ActivityThread.java:4340) 02-13 18:41:50.919: E/AndroidRuntime(704): at java.lang.reflect.Method.invokeNative(Native Method) 02-13 18:41:50.919: E/AndroidRuntime(704): at java.lang.reflect.Method.invoke(Method.java:511) 02-13 18:41:50.919: E/AndroidRuntime(704): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 02-13 18:41:50.919: E/AndroidRuntime(704): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 02-13 18:41:50.919: E/AndroidRuntime(704): at dalvik.system.NativeStart.main(Native Method) 02-13 18:41:50.919: E/AndroidRuntime(704): Caused by: java.lang.NullPointerException 02-13 18:41:50.919: E/AndroidRuntime(704): at com.example.erpsecurity.FreeCategory$ImageAdapter.getCount(FreeCategory.java:242) 02-13 18:41:50.919: E/AndroidRuntime(704): at android.widget.GridView.setAdapter(GridView.java:180) 02-13 18:41:50.919: E/AndroidRuntime(704): at com.example.erpsecurity.FreeCategory.onCreate(FreeCategory.java:56) 02-13 18:41:50.919: E/AndroidRuntime(704): at android.app.Activity.performCreate(Activity.java:4465) 02-13 18:41:50.919: E/AndroidRuntime(704): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 02-13 18:41:50.919: E/AndroidRuntime(704): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1919) 02-13 18:41:50.919: E/AndroidRuntime(704): ... 11 more 02-13 18:41:54.840: I/Process(704): Sending signal. PID: 704 SIG: 9 02-13 18:50:26.289: W/ActivityThread(750): Application com.example.erpsecurity is waiting for the debugger on port 8100... 02-13 18:50:26.389: I/System.out(750): Sending WAIT chunk 02-13 18:50:26.541: I/dalvikvm(750): Debugger is active 02-13 18:50:26.629: I/System.out(750): Debugger has connected 02-13 18:50:26.629: I/System.out(750): waiting for debugger to settle... 02-13 18:50:26.829: I/System.out(750): waiting for debugger to settle... 02-13 18:50:27.029: I/System.out(750): waiting for debugger to settle... 02-13 18:50:27.229: I/System.out(750): waiting for debugger to settle... 02-13 18:50:27.439: I/System.out(750): waiting for debugger to settle... 02-13 18:50:27.639: I/System.out(750): waiting for debugger to settle... 02-13 18:50:27.840: I/System.out(750): waiting for debugger to settle... 02-13 18:50:28.099: I/System.out(750): waiting for debugger to settle... 02-13 18:50:28.299: I/System.out(750): waiting for debugger to settle... 02-13 18:50:28.546: I/System.out(750): waiting for debugger to settle... 02-13 18:50:28.794: I/System.out(750): waiting for debugger to settle... 02-13 18:50:29.001: I/System.out(750): debugger has settled (1372) 02-13 18:50:30.271: D/dalvikvm(750): GC_FOR_ALLOC freed 52K, 3% free 9962K/10179K, paused 57ms 02-13 18:50:30.332: I/dalvikvm-heap(750): Grow heap (frag case) to 12.753MB for 3085244-byte allocation 02-13 18:50:30.519: D/dalvikvm(750): GC_CONCURRENT freed 1K, 3% free 12973K/13255K, paused 23ms+4ms 02-13 18:50:30.899: D/dalvikvm(750): GC_FOR_ALLOC freed &lt;1K, 3% free 12974K/13255K, paused 32ms 02-13 18:50:30.969: I/dalvikvm-heap(750): Grow heap (frag case) to 19.378MB for 6947096-byte allocation 02-13 18:50:31.089: D/dalvikvm(750): GC_CONCURRENT freed 0K, 2% free 19758K/20103K, paused 4ms+9ms 02-13 18:50:32.599: D/gralloc_goldfish(750): Emulator without GPU emulation detected. 02-13 18:50:32.749: W/TextLayoutCache(750): computeValuesWithHarfbuzz -- need to force to single run 02-13 18:52:00.749: D/dalvikvm(750): GC_FOR_ALLOC freed 3379K, 17% free 17301K/20807K, paused 53ms 02-13 18:52:00.769: I/dalvikvm-heap(750): Grow heap (frag case) to 19.924MB for 3088320-byte allocation 02-13 18:52:00.919: D/dalvikvm(750): GC_FOR_ALLOC freed 6K, 15% free 20311K/23879K, paused 53ms 02-13 18:52:01.279: D/dalvikvm(750): GC_CONCURRENT freed 1K, 15% free 20312K/23879K, paused 5ms+7ms 02-13 18:52:01.469: D/dalvikvm(750): GC_FOR_ALLOC freed 26K, 16% free 20286K/23879K, paused 64ms 02-13 18:52:01.529: I/dalvikvm-heap(750): Grow heap (frag case) to 26.524MB for 6951712-byte allocation 02-13 18:52:01.649: D/dalvikvm(750): GC_FOR_ALLOC freed 0K, 12% free 27075K/30727K, paused 56ms 02-13 18:52:02.139: D/dalvikvm(750): GC_CONCURRENT freed 1K, 12% free 27078K/30727K, paused 5ms+11ms 02-13 18:52:04.359: W/TextLayoutCache(750): computeValuesWithHarfbuzz -- need to force to single run **above are my code and log file** Any help would be great full Thanks in Advance nw my error log file: here is my error.log file:02-14 16:48:19.546: E/AndroidRuntime(893): FATAL EXCEPTION: main 02-14 16:48:19.546: E/AndroidRuntime(893): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.erpsecurity/com.example.erpsecurity.FreeCategory}: java.lang.NullPointerException 02-14 16:48:19.546: E/AndroidRuntime(893): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1955) 02-14 16:48:19.546: E/AndroidRuntime(893): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980) 02-14 16:48:19.546: E/AndroidRuntime(893): at android.app.ActivityThread.access$600(ActivityThread.java:122) 02-14 16:48:19.546: E/AndroidRuntime(893): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146) 02-14 16:48:19.546: E/AndroidRuntime(893): at android.os.Handler.dispatchMessage(Handler.java:99) 02-14 16:48:19.546: E/AndroidRuntime(893): at android.os.Looper.loop(Looper.java:137) 02-14 16:48:19.546: E/AndroidRuntime(893): at android.app.ActivityThread.main(ActivityThread.java:4340) 02-14 16:48:19.546: E/AndroidRuntime(893): at java.lang.reflect.Method.invokeNative(Native Method) 02-14 16:48:19.546: E/AndroidRuntime(893): at java.lang.reflect.Method.invoke(Method.java:511) 02-14 16:48:19.546: E/AndroidRuntime(893): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 02-14 16:48:19.546: E/AndroidRuntime(893): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 02-14 16:48:19.546: E/AndroidRuntime(893): at dalvik.system.NativeStart.main(Native Method) 02-14 16:48:19.546: E/AndroidRuntime(893): Caused by: java.lang.NullPointerException 02-14 16:48:19.546: E/AndroidRuntime(893): at com.example.erpsecurity.FreeCategory$ImageAdapter.getCount(FreeCategory.java:134) 02-14 16:48:19.546: E/AndroidRuntime(893): at android.widget.GridView.setAdapter(GridView.java:180) 02-14 16:48:19.546: E/AndroidRuntime(893): at com.example.erpsecurity.FreeCategory.onCreate(FreeCategory.java:56) 02-14 16:48:19.546: E/AndroidRuntime(893): at android.app.Activity.performCreate(Activity.java:4465) 02-14 16:48:19.546: E/AndroidRuntime(893): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 02-14 16:48:19.546: E/AndroidRuntime(893): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1919) </code></pre>
 

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