android打车类代码 安卓编程代码大全

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);

6、显示toast

Toast.makeText(this._getApplicationContext(), R.string._item, Toast.LENGTH_SHORT).show();

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 );   
}  
}

14、通过HttpClient从指定server获取数据

DefaultHttpClient httpClient = new DefaultHttpClient();  
 
HttpGet method = new HttpGet(“/templets/default/index.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();  
}  
}