Intent intent = new Intent("android.intent.action.SEND");
intent.setPackage(com.sina.weibo);
intent.setType("image/*");
intent.putExtra(Intent.EXTRA_SUBJECT, "分享");
intent.putExtra(Intent.EXTRA_TEXT, "终于可以了!!!");
intent.putExtra(Intent.EXTRA_STREAM,Uri.parse("file:////sdcard//8.png"));
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);