queryIntentActivities快速获取自己App内的所有指定的Activity 并设置跳转

//这个在AndroidManifest中加入 CATEGORY_SAMPLE_CODE 标记
  <activity
             android:name="com.xxx.xxx.xxx.activity.TestActivity"
             android:configChanges="orientation|keyboardHidden|screenLayout"
             android:label="Test"
             android:screenOrientation="portrait" >
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="com.xxx.xxx.xxx.intent.category.SAMPLE_CODE" />
             </intent-filter>
         </activity>

 public static final String CATEGORY_SAMPLE_CODE = "com.xxx.xxx.xxx.intent.category.SAMPLE_CODE";

 private List<Map<String, Object>> getData() {
        List<Map<String, Object>> myData = new ArrayList<Map<String, Object>>();

        Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
        mainIntent.addCategory(CATEGORY_SAMPLE_CODE);

        PackageManager pm = getPackageManager();
        List<ResolveInfo> list = pm.queryIntentActivities(mainIntent, 0);

        if (null == list) {
            return myData;
        }

        int len = list.size();

        for (int i = 0; i < len; i++) {
            ResolveInfo info = list.get(i);
            if (!getPackageName().equalsIgnoreCase(info.activityInfo.packageName)) {
                continue;
            }
            CharSequence labelSeq = info.loadLabel(pm);
            CharSequence description = null;
            if (info.activityInfo.descriptionRes != 0) {
                description = pm.getText(info.activityInfo.packageName,
                        info.activityInfo.descriptionRes, null);
            }

            String label = labelSeq != null ? labelSeq.toString() : info.activityInfo.name;
            addItem(myData,
                    label,
                    activityIntent(info.activityInfo.applicationInfo.packageName,
                            info.activityInfo.name), description);
        }
        return myData;
    }

    private void addItem(List<Map<String, Object>> data, String name, Intent intent,
                         CharSequence description) {
        Map<String, Object> temp = new HashMap<String, Object>();
        temp.put("title", name);
        if (description != null) {
            temp.put("description", description.toString());
        }
        temp.put("intent", intent);
        data.add(temp);
    }

    private Intent activityIntent(String pkg, String componentName) {
        Intent result = new Intent();
        result.setClassName(pkg, componentName);
        return result;
    }

    @Override
    @SuppressWarnings("unchecked")
   public void onListItemClick(ListView l, View v, int position, long id) {
        Map<String, Object> map = (Map<String, Object>) l.getItemAtPosition(position);
        Intent intent = (Intent) map.get("intent");
        startActivity(intent);
    }
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