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
}
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.
TextView msgTextView = (TextView)findViewById(R.id.msg);
?? msgTextView.setText(R.string.push_me);
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);
?? 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);
7:发送Mail
???????????? mime = “img/jpg”;
??????????? 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);
8:注册一个BroadcastReceiver
registerReceiver(mMasterResetReciever, new 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();
??????????? }
??????? }
??? };
9:定义ContentObserver,监听某个数据表
private ContentObserver mDownloadsObserver = new DownloadsChangeObserver(Downloads.CONTENT_URI);
private class DownloadsChangeObserver extends ContentObserver {
??????? public DownloadsChangeObserver(Uri uri) {
??????????? super(new Handler());
??????? }
??????? @Override
??????? public void onChange(boolean selfChange) {}?
??????? }
??
10:获得 手机UA
public String getUserAgent()
??? {
?????????? String user_agent = ProductProperties.get(ProductProperties.USER_AGENT_KEY, null);
??????????? return user_agent;
??? }
11:清空手机上Cookie
CookieSyncManager.createInstance(getApplicationContext());
??????? CookieManager.getInstance().removeAllCookie();
12: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”, “”, “”);
??????????? }
??? }
13:PreferenceActivity 用法
public class Setting extends 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”/>
14:通过HttpClient从指定server获取数据
???????????? DefaultHttpClient httpClient = new 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();
??????????????? }
??????????? }
15:显示toast
Toast.makeText(this._getApplicationContext(), R.string._item, Toast.LENGTH_SHORT).show();