Android development accumulate _2) permissions, Intent

the integration of this time to develop testing tools used in some of the things, accumulated, their brains are not very flexible, only think of this method: every time recorded, although very simple (for many people Speaking).

use of file.separator:

In Android , it is officially encouraged to support the use of file.separator to insert the "/" symbol . The escape character of the"/" symbol will be different depending on the configuration system of the different models *; on UNIX Systems, the value of this field is '/' ; in Microsoft Windows on the system, it is ' \ '. It is generally recommended to use file.separator.

The following examples illustrate two ways to do this:

method One :

String mPath1 = Environment.getexternalstoragedirectory ()

. GetPath () + "/" + "test.txt";

File FileName = new file (mPath1);

method Two :

String mpath2= environment.getexternalstoragedirectory ()

. GetPath () +file.separator+ "test.txt";

File Filenam = new file (mPath2);

List Androidmanifest.xml1. Permissions

<!--writing data to external SD Card --

< uses-permission android:name="Android.permission.WRITE_EXTERNAL_STORAGE" />

<!--Read external SD card Data--

< uses-permission android:name="Android.permission.READ_EXTERNAL_STORAGE" />

<!--can create, copy, and delete files or folders --

< uses-permission android:name="Android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />

<!-- Make a phone call -

< uses-permission

android:name="Android.permission.CALL_PHONE" />

<!-- Read phone status -

< uses-permission android:name="Android.permission.READ_PHONE_STATE" />

<!-- Read Contact Data -

< uses-permission

android:name="Android.permission.READ_CONTACTS" />

<!-- read operation of the Call log data table -

< uses-permission

android:name="Android.permission.READ_CALL_LOG" />

<!-- write operation of the call log data table -

< uses-permission

android:name="Android.permission.WRITE_CALL_LOG" />

<!-- write operations for contact data tables -

< uses-permission

android:name="Android.permission.WRITE_CONTACTS" />

<!-- write operations for SMS data tables -

< uses-permission

android:name="Android.permission.WRITE_SMS" />

<!-- read operation of SMS data table -

< uses-permission

android:name="Android.permission.READ_SMS" />

<!-- send operation of SMS data -

< uses-permission

android:name="Android.permission.SEND_SMS" />

<!-- receive operation of SMS data -

< uses-permission

android:name="Android.permission.RECEIVE_SMS" />

<!-- browser bookmarks, browsing history read operations -

< uses-permission android:name="Com.android.browser.permission.READ_HISTORY_BOOKMARKS" />

<!-- browser bookmarks, browsing history write operations -

< uses-permission android:name="Com.android.browser.permission.WRITE_HISTORY_BOOKMARKS" />

<!-- write operations for MMS attachments -

< uses-permission android:name="Com.android.email.permission.READ_ATTACHMENT"/>

<!--  writing system app &NBSP; " = "1.0"   "that column is added --> &NBSP;&NBSP;&NBSP; android:shareduserid = " Android.uid.system "

2. implicit invocation ( Intent "< intent-filter > " (Implicit invocation: does not display a specific activity or app requires a specific abstract " action ":" Com.test.key " )

<!-- An abstraction of Action completion " Action " -

< Action android:name="Com.test.key" />

<!-- two required for implicit invocation category Properties -

< category android:name="Android.intent.category.DEFAULT" /> <category C7>android:name="mycategory" />

Android development accumulate _2) permissions, Intent