Start Intent in Adapter

Question

I want to start a new activity from this base adapter.

public class EfficientAdapter extends BaseAdapter {

    private Activity activity;
    private ArrayList<ComptePost> data;
    private static LayoutInflater inflater = null;
    public ImageLoader imageLoader; 
    public  Boolean isActusAstuce;
    public static int flag = 0, counter=0;

    private Context context;

    public EfficientAdapter(Context context) {
        this.context = context;     
    }

    NVirementEmmeteur main;

    int num = 0;

    ViewHolder holder;
    static String src;

    public EfficientAdapter(Activity a, ArrayList<ComptePost> d) {
        activity = a;
        data = d;
        inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        //  imageLoader = new ImageLoader(activity.getApplicationContext());
        imageLoader=new ImageLoader(activity.getApplicationContext());
    }

    public EfficientAdapter(NVirementEmmeteur m) {
        main = m;
    }

    @Override
    public int getCount() {
        return data.toArray().length;
    }

    @Override
    public Object getItem(int position) {
        return position;
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    public static class ViewHolder {
        public TextView one;
        public TextView two;
        public TextView three;
        public ImageView image;
        public RelativeLayout relative_layout;
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        View vi = convertView;
        holder.relative_layout.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                v.getContext().startActivity(new Intent(context, NVirementEmmeteur.class)); 
            }
        });
        return vi;
    }
}

I tried

context.startActivity(new Intent(context, NVirementEmmeteur.class));

and

v.getContext().startActivity(new Intent(context, NVirementEmmeteur.class));

but it force closes my application.

The intent should launch inside an onclicklistener() from the list adapter. Can someone tell me how to launch an intent from my efficientadapter.class please.

Here is my logcat output:

04-11 10:07:50.878: E/AndroidRuntime(11179): FATAL EXCEPTION: main 04-11 10:07:50.878: E/AndroidRuntime(11179): java.lang.NullPointerException 04-11 10:07:50.878: E/AndroidRuntime(11179): at android.content.ComponentName.(ComponentName.java:75) 04-11 10:07:50.878: E/AndroidRuntime(11179): at android.content.Intent.(Intent.java:2863) 04-11 10:07:50.878: E/AndroidRuntime(11179): at.adapter.EfficientAdapter$1.onClick(EfficientAdapter.java:141) 04-11 10:07:50.878: E/AndroidRuntime(11179): at android.view.View.performClick(View.java:2538) 04-11 10:07:50.878: E/AndroidRuntime(11179): at android.view.View$PerformClick.run(View.java:9152) 04-11 10:07:50.878: E/AndroidRuntime(11179): at android.os.Handler.handleCallback(Handler.java:587) 04-11 10:07:50.878: E/AndroidRuntime(11179): at android.os.Handler.dispatchMessage(Handler.java:92) 04-11 10:07:50.878: E/AndroidRuntime(11179): at android.os.Looper.loop(Looper.java:130) 04-11 10:07:50.878: E/AndroidRuntime(11179): at android.app.ActivityThread.main(ActivityThread.java:3687) 04-11 10:07:50.878: E/AndroidRuntime(11179): at java.lang.reflect.Method.invokeNative(Native Method) 04-11 10:07:50.878: E/AndroidRuntime(11179): at java.lang.reflect.Method.invoke(Method.java:507) 04-11 10:07:50.878: E/AndroidRuntime(11179): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842) 04-11 10:07:50.878: E/AndroidRuntime(11179): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600) 04-11 10:07:50.878: E/AndroidRuntime(11179): at dalvik.system.NativeStart.main(Native Method)

Answer 1

set clickListener on listview in mainactivity from there start the intent

    lv.setAdapter(adapter);
lv.setOnItemClickListener(new OnItemClickListener()
{
@Override public void onItemClick(AdapterView<?> arg0, View arg1,int position, long arg3)
{ 
    Intent intent = new Intent(getActivity,Test.class);
startActivity(intent);
}
});

Answer 2

Set an intent for the class u need to open.In manifest file . Eg:

<activity android:name=".openingclass"
android:label="@string/app_name">
 <intent-filter>
 <action android:name="android.intent.action.OPEN" />
 <category android:name="android.intent.category.DEFAULT" />
 </intent-filter>
 </activity>

Then

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
           Intent i=new Intent("android.intent.action.OPEN");
           StartActivity(i);
                  }