share_facebook_sample.java

private void shareFacebook(String text)
{
  String packageName = "com.facebook.katana";
  String activityName = null;
  
  // 該当パッケージをもつアプリで、ACTION_SENDに対応しているactivityを取得する
  // 暗黙的インテントで表示されるリストから該当のアプリを探し出すという感じ
  PackageManager pm = getPackageManager();
  Intent intent = new Intent( Intent.ACTION_SEND );
  intent.setType("text/plain");
  List<ResolveInfo> resolves = pm.queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
  ActivityInfo activityinfo = null;
  for (ResolveInfo info: resolves) {
    activityinfo = info.activityInfo;
    
    if (activityinfo.packageName.equals(packageName)) {
      activityName = activityinfo.name;
      break;
    }
    
    Log.d("package name", activityinfo.packageName);
    Log.d("activity name", activityinfo.name);
  }
  
  // Facebook公式アプリがインストールされてない
  if (activityName == null) {
    Toast t = Toast.make(getApplicationContext(), "not installed", Toast.LENGTH_LONG);
    t.show();
    return;
  }
  
  // 呼び出す
  ComponentName componentName = new ComponentName(packageName, activityName);
  intent.setComponent(componentName)
        .putExtra(Intent.EXTRA_TEXT, text);
  startActivity(intent);
  
}