Hey thanks for the fast reply :), I am sorry for the next question but I am really new to all this: how do I set breakpoints??
On Fri, Jul 16, 2010 at 9:58 PM, Kostya Vasilyev <[email protected]> wrote: > Victoria, > > The cause of this exception appears in logcat: > > > 07-16 19:40:45.124: ERROR/AndroidRuntime(225): Caused by: > java.lang.NullPointerException > 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at > com.mobilevideoeditor.moved.EditGalleryView > $VideoAdapter.getCount(EditGalleryView.java:73) > > Looks like vidUris is null. > > Set a breakpoint and debug - looks like adapter's getCount() gets called > before the information (vidUris) becomes available. > > -- Kostya > > 17.07.2010 0:49, Victoria пишет: > > Hi, >> >> I am trying to load videos from my emulated sdcard into my implemented >> GridView, it worked fine before, when I used the GridView example from >> Google...but now I get a Force close error when I try to open the app. >> >> The entire app works (or rather should work) like this a TabView is >> launched that includes 2 tabs (GalleryView.java and main.xml), each >> tab loads a GridView (EditGalleryView.java and ShareGalleryView.java). >> Before I tried loading videos into the gridView I simply used the >> GridView example as starting point. Now on basis of this example I am >> trying to load videos into my GridView from the sdcard, which >> apparently seems to cause a Force Close Error. >> >> If someone could help me find the problem that's causing this, it >> would be great because I really don't know what's wrong now ... >> Thanks in Advance >> >> Here is the code I use: >> >> The Manifest.xml: >> <?xml version="1.0" encoding="utf-8"?> >> <manifest xmlns:android="http://schemas.android.com/apk/res/android"; >> package="com.mobilevideoeditor.moved" >> android:versionCode="1" >> android:versionName="1.0"> >> <application android:icon="@drawable/icon" android:label="@string/ >> app_name"> >> <activity android:name=".EditGalleryView" >> android:label="@string/app_name" >> android:theme="@android:style/ >> Theme.NoTitleBar"> >> <intent-filter> >> <action android:name="android.intent.action.PICK"/ >> >> >>> >>> >> </intent-filter> >> </activity> >> <activity android:name=".ShareGalleryView" >> android:label="@string/app_name" >> android:theme="@android:style/ >> Theme.NoTitleBar"> >> <intent-filter> >> <action >> android:name="android.intent.action.SEND"/> >> </intent-filter> >> </activity> >> <activity android:name=".GalleryView" >> android:label="@string/app_name" >> android:theme="@android:style/ >> Theme.NoTitleBar"> >> <intent-filter> >> <action >> android:name="android.intent.action.MAIN" /> >> <category >> android:name="android.intent.category.LAUNCHER" /> >> </intent-filter> >> </activity> >> </application> >> <uses-permission >> android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> >> <uses-permission >> android:name="android.permission.READ_EXTERNAL_STORAGE"/> >> </manifest> >> >> The GalleryView.java: >> >> package com.mobilevideoeditor.moved; >> >> import android.app.TabActivity; >> import android.content.Intent; >> import android.content.res.Resources; >> import android.os.Bundle; >> import android.widget.TabHost; >> >> public class GalleryView extends TabActivity { >> /** Called when the activity is first created. */ >> @Override >> public void onCreate(Bundle savedInstanceState) { >> super.onCreate(savedInstanceState); >> setContentView(R.layout.main); >> >> Resources res = getResources(); // Resource object to get >> Drawables >> TabHost tabHost = getTabHost(); // The activity TabHost >> TabHost.TabSpec spec; // Reusable TabSpec for each tab >> Intent intent; // Reusable Intent for each tab >> >> // Create an Intent to launch an EditGallery for the tab (to be >> reused) >> intent = new Intent().setClass(this, EditGalleryView.class); >> >> // Initialize a TabSpec for each tab and add it to the TabHost >> spec = tabHost.newTabSpec("edit").setIndicator("Edit", >> res.getDrawable(R.layout.ic_tab_edit)) >> .setContent(intent); >> tabHost.addTab(spec); >> >> intent = new Intent().setClass(this, ShareGalleryView.class); >> spec = tabHost.newTabSpec("share").setIndicator("Share", >> res.getDrawable(R.layout.ic_tab_share)) >> .setContent(intent); >> tabHost.addTab(spec); >> >> tabHost.setCurrentTab(0); >> } >> } >> >> The EditGalleryView.java (which seems to cause my problem): >> >> package com.mobilevideoeditor.moved; >> >> import java.util.ArrayList; >> >> import android.app.Activity; >> import android.content.Context; >> import android.database.Cursor; >> import android.net.Uri; >> import android.os.Bundle; >> import android.provider.MediaStore; >> import android.util.Log; >> import android.view.View; >> import android.view.ViewGroup; >> import android.widget.BaseAdapter; >> import android.widget.GridView; >> import android.widget.VideoView; >> >> >> >> >> public class EditGalleryView extends Activity { >> Uri[] vidUris; >> public void onCreate(Bundle savedInstanceState) { >> super.onCreate(savedInstanceState); >> setContentView(R.layout.videogrid); >> >> GridView vGrid=(GridView) findViewById(R.id.vgrid); >> vGrid.setAdapter(new VideoAdapter(this)); >> >> Uri uri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI; >> >> Log.d("EditGalleryView", "uri:"+uri); >> String[] projection = { >> MediaStore.Video.Media.DESCRIPTION, >> MediaStore.Video.Media.DATA >> }; >> >> Cursor c = this.managedQuery(uri, projection, null, null, >> MediaStore.Video.Media.DATE_ADDED); >> Log.d("EditGalleryView", "vids available:" >> +c.getCount()); >> >> ArrayList<Uri> experimentVids = new >> ArrayList<Uri>(); >> >> >> if (c.getCount() != 0) { >> c.moveToFirst(); >> // >> experimentVids.add(Uri.parse(c.getString(1))); >> while (c.moveToNext()) { >> >> experimentVids.add(Uri.parse(c.getString(1))); >> >> } >> } >> Log.d("ClassName", >> "experimentVids.length:" +experimentVids.size()); >> if >> (experimentVids.size() != 0) { >> vidUris = new >> Uri[experimentVids.size()]; >> for (int i = 0; >> i< experimentVids.size(); i++) { >> vidUris[i] = >> experimentVids.get(i); >> } >> >> Log.d("EditGalleryView", "vidUris:"+vidUris.length); >> } >> } >> >> >> public class VideoAdapter extends BaseAdapter { >> private Context mContext; >> >> public VideoAdapter(Context c) { >> mContext = c; >> } >> >> public int getCount() { >> //return mThumbIds.length; >> return vidUris.length; >> } >> >> public Object getItem(int position) { >> //return null; >> return position; >> } >> >> public long getItemId(int position) { >> //return 0; >> return position; >> } >> >> // create a new ImageView for each item referenced by the >> Adapter >> public View getView(int position, View convertView, ViewGroup >> parent) { >> VideoView videoView; >> if (convertView == null) { // if it's not recycled, >> initialize some attributes >> videoView = new VideoView(mContext); >> videoView.setVideoURI(vidUris[position]); >> videoView.setLayoutParams(new >> GridView.LayoutParams(85, 85)); >> // >> videoView.setScaleType(ImageView.ScaleType.CENTER_CROP); >> videoView.setPadding(8, 8, 8, 8); >> } else { >> videoView = (VideoView) convertView; >> } >> >> // imageView.setImageResource(mThumbIds[position]); >> return videoView; >> } >> >> And this is my LogCat Error Output: >> >> 07-16 19:40:45.074: ERROR/AndroidRuntime(225): Uncaught handler: >> thread main exiting due to uncaught exception >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): >> java.lang.RuntimeException: Unable to start activity >> ComponentInfo{com.mobilevideoeditor.moved/ >> com.mobilevideoeditor.moved.GalleryView}: java.lang.RuntimeException: >> Unable to start activity ComponentInfo{com.mobilevideoeditor.moved/ >> com.mobilevideoeditor.moved.EditGalleryView}: >> java.lang.NullPointerException >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> android.app.ActivityThread.performLaunchActivity(ActivityThread.java: >> 2496) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> android.app.ActivityThread.handleLaunchActivity(ActivityThread.java: >> 2512) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> android.app.ActivityThread.access$2200(ActivityThread.java:119) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> android.os.Handler.dispatchMessage(Handler.java:99) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> android.os.Looper.loop(Looper.java:123) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> android.app.ActivityThread.main(ActivityThread.java:4363) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> java.lang.reflect.Method.invokeNative(Native Method) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> java.lang.reflect.Method.invoke(Method.java:521) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> com.android.internal.os.ZygoteInit >> $MethodAndArgsCaller.run(ZygoteInit.java:860) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> dalvik.system.NativeStart.main(Native Method) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): Caused by: >> java.lang.RuntimeException: Unable to start activity >> ComponentInfo{com.mobilevideoeditor.moved/ >> com.mobilevideoeditor.moved.EditGalleryView}: >> java.lang.NullPointerException >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> android.app.ActivityThread.performLaunchActivity(ActivityThread.java: >> 2496) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> android.app.ActivityThread.startActivityNow(ActivityThread.java:2335) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> android.app.LocalActivityManager.moveToState(LocalActivityManager.java: >> 127) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> android.app.LocalActivityManager.startActivity(LocalActivityManager.java: >> 339) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> android.widget.TabHost >> $IntentContentStrategy.getContentView(TabHost.java:648) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> android.widget.TabHost.setCurrentTab(TabHost.java:320) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> android.widget.TabHost.addTab(TabHost.java:213) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> com.mobilevideoeditor.moved.GalleryView.onCreate(GalleryView.java:28) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> android.app.Instrumentation.callActivityOnCreate(Instrumentation.java: >> 1047) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> android.app.ActivityThread.performLaunchActivity(ActivityThread.java: >> 2459) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): ... 11 more >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): Caused by: >> java.lang.NullPointerException >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> com.mobilevideoeditor.moved.EditGalleryView >> $VideoAdapter.getCount(EditGalleryView.java:73) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> android.widget.GridView.setAdapter(GridView.java:128) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> com.mobilevideoeditor.moved.EditGalleryView.onCreate(EditGalleryView.java: >> 28) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> android.app.Instrumentation.callActivityOnCreate(Instrumentation.java: >> 1047) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): at >> android.app.ActivityThread.performLaunchActivity(ActivityThread.java: >> 2459) >> 07-16 19:40:45.124: ERROR/AndroidRuntime(225): ... 20 more >> >> >> > > > -- > Kostya Vasilev -- WiFi Manager + pretty widget -- > http://kmansoft.wordpress.com > > > -- > You received this message because you are subscribed to the Google > Groups "Android Beginners" group. > > NEW! 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