1:查看是否有存储卡插入
status=Environment.getExternalStorageState();
if(status.equals(Enviroment.MEDIA_MOUNTED))
{
说明有SD卡插入
}
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)
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.
代码如下:
(TextView)findViewById(R.id.msg);
msgTextView.setText(R.string.push_me);
4:发送短信
代码如下:
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);
5:发送彩信
代码如下:
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)
6:发送Mail
代码如下:
shareIntent.setDataAndType(Uri.fromFile(fd), mime);
shareIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(fd));
shareIntent.putExtra(Intent.EXTRA_SUBJECT, subject);
shareIntent.putExtra(Intent.EXTRA_TEXT, body);
7:注册一个BroadcastReceiver
代码如下:
IntentFilter("oms.action.MASTERRESET"));
private BroadcastReceiver
mMasterResetReciever = new BroadcastReceiver() {
public void
onReceive(Context context, Intent intent){
String action =
intent.getAction();
if("oms.action.MASTERRESET".equals(action)){
RecoverDefaultConfig();
}
}
}
8:定义ContentObserver,监听某个数据表
代码如下:
= new DownloadsChangeObserver(Downloads.CONTENT_URI);
private class
DownloadsChangeObserver extends ContentObserver {
public
DownloadsChangeObserver(Uri uri) {
super(new
Handler());
}
@Override
public void
onChange(boolean selfChange) {}
}
9:获得 手机UA
代码如下:
{
String user_agent =
ProductProperties.get(ProductProperties.USER_AGENT_KEY, null);
return user_agent;
}
10:清空手机上Cookie
代码如下:
CookieManager.getInstance().removeAllCookie();11:建立GPRS连接
//Dial the GPRS link.
private boolean openDataConnection()
{
// Set up data connection.
DataConnection conn =
DataConnection.getInstance();
if (connectMode == 0)
{
ret = conn.openConnection(mContext, "cmwap", "cmwap",
"cmwap");
} else {
ret =
conn.openConnection(mContext, "cmnet", "", "");
}
}
12:PreferenceActivity 用法
代码如下:
PreferenceActivity
{
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.settings);
}
}
Setting.xml:
android:key="seting2″
android:title="@string/seting2″
android:summary="@string/seting2″/>
android:key="seting1″
android:title="@string/seting1″
android:summaryOff="@string/seting1summaryOff"
android:summaryOn="@stringseting1summaryOff"/>
13:通过HttpClient从指定server获取数据
代码如下:
DefaultHttpClient();
HttpGet method = new HttpGet("http://www.baidu.com/1.html");
HttpResponse resp;
Reader reader = null;
try
{
// AllClientPNames.TIMEOUT
HttpParams
params = new BasicHttpParams();
params.setIntParameter(AllClientPNames.CONNECTION_TIMEOUT,
10000);
httpClient.setParams(params);
resp
= httpClient.execute(method);
int status =
resp.getStatusLine().getStatusCode();
if (status !=
HttpStatus.SC_OK) return false;
//
HttpStatus.SC_OK;
return true;
} catch
(ClientProtocolException e) {
// TODO Auto-generated catch
block
e.printStackTrace();
} catch
(IOException e) {
// TODO Auto-generated catch
block
e.printStackTrace();
} finally
{
if (reader != null) try {
reader.close();
} catch (IOException e)
{
// TODO Auto-generated catch
block
e.printStackTrace();
}
}