Android很有用的代码片段

核心提示：1：查看是否有存储卡插入String status=Environment.getExternalStorageState();if(status.equals(Enviroment.MEDIA_MOUNTED)){说明有SD卡插入}回目录2：让某个Activity透明OnCreate中不设Layoutthis.set

1：查看是否有存储卡插入

String status=Environment.getExternalStorageState();

if(status.equals(Enviroment.MEDIA_MOUNTED))

{

说明有SD卡插入

}

回目录2：让某个Activity透明

OnCreate中不设Layout

this.setTheme(R.style.Theme_Transparent);

以下是Theme_Transparent的定义(注意transparent_bg是一副透明的图片)

回目录3：在屏幕元素中设置句柄

使用Activity.findViewById来取得屏幕上的元素的句柄. 使用该句柄您可以设置或获取任何该对象外露的值.

TextView msgTextView = (TextView)findViewById(R.id.msg);

msgTextView.setText(R.string.push_me);

回目录4：发送短信

String body=”this is mms demo”;

Intent mmsintent = new Intent(Intent.ACTION_SENDTO, Uri.fromParts(”smsto”, number, null));

mmsintent.putExtra(Messaging.KEY_ACTION_SENDTO_MESSAGE_BODY, body);

mmsintent.putExtra(Messaging.KEY_ACTION_SENDTO_COMPOSE_MODE, true);

mmsintent.putExtra(Messaging.KEY_ACTION_SENDTO_EXIT_ON_SENT, true);

startActivity(mmsintent);

回目录5：发送彩信

StringBuilder sb = new StringBuilder();

sb.append(”file://”);

sb.append(fd.getAbsoluteFile());

Intent intent = new Intent(Intent.ACTION_SENDTO, Uri.fromParts(”mmsto”, number, null));

// Below extra datas are all optional.

intent.putExtra(Messaging.KEY_ACTION_SENDTO_MESSAGE_SUBJECT, subject);

intent.putExtra(Messaging.KEY_ACTION_SENDTO_MESSAGE_BODY, body);

intent.putExtra(Messaging.KEY_ACTION_SENDTO_CONTENT_URI, sb.toString());

intent.putExtra(Messaging.KEY_ACTION_SENDTO_COMPOSE_MODE, composeMode);

intent.putExtra(Messaging.KEY_ACTION_SENDTO_EXIT_ON_SENT, exitOnSent);

startActivity(intent);

回目录6：发送Mail

mime = “img/jpg”;

shareIntent.setDataAndType(Uri.fromFile(fd), mime);