//使用chooserIntent private void startImplicitActivation() {                Log.i(TAG, "Entered startImplicitActivation()");                // TODO - Create a base intent for viewing a URL        // (HINT:  second parameter uses Uri.parse())        Uri myUri = Uri.parse(URL);        Intent baseIntent = new Intent(Intent.ACTION_VIEW, myUri);        // TODO - Create a chooser intent, for choosing which Activity        // will carry out the baseIntent        // (HINT: Use the Intent class' createChooser() method)        Intent chooserIntent = Intent.createChooser(baseIntent, "Display this url via ..");                Log.i(TAG,"Chooser Intent Action:" + chooserIntent.getAction());                        // TODO - Start the chooser Activity, using the chooser intent        startActivity(chooserIntent);            }

设置Intent-filter

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