Go语言视频零基础入门到精通

njjwheu

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

}
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2：让某个Activity透明
OnCreate中不设Layout
this.setTheme(R.style.Theme_Transparent);
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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);
复制代码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);
复制代码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);
复制代码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);
复制代码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();

}

}



};
复制代码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) {｝

}
复制代码10:获得 手机UA public String getUserAgent()

{

String user_agent = ProductProperties.get(ProductProperties.USER_AGENT_KEY, null);

return user_agent;

}
复制代码11：清空手机上cookie CookieSyncManager.createInstance(getApplicationContext());

CookieManager.getInstance().removeAllCookie();
复制代码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”, “”, “”);

}



}
复制代码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”/>
复制代码14:通过HttpClient从指定server获取数据 DefaultHttpClient httpClient = new DefaultHttpClient();

HttpGet method = new HttpGet(“[url]http://www.baidu.com/1.HTML