android - App manifest(3)

> <uses-feature android:name="android.hardware.screen.portrait"/>

In contrast, "singleTask" and "singleInstance" activities can only begin a task. They are always at the root of the activity stack. Moreover, the device can hold only one instance of the activity at a time — only one such task.

The "standard" and "singleTop" modes differ from each other in just one respect: Every time there's a new intent for a "standard" activity, a new instance of the class is created to respond to that intent. Each instance handles a single intent. Similarly, a new instance of a "singleTop" activity may also be created to handle a new intent. 

> 

<application android:allowTaskReparenting=["true" | "false"]
             android:allowBackup=["true" | "false"]
             android:backupAgent="string"
             android:banner="drawable resource"
             android:debuggable=["true" | "false"]
             android:description="string resource"
             android:enabled=["true" | "false"]
             android:hasCode=["true" | "false"]
             android:hardwareAccelerated=["true" | "false"]
             android:icon="drawable resource"
             android:isGame=["true" | "false"]
             android:killAfterRestore=["true" | "false"]
             android:largeHeap=["true" | "false"]
             android:label="string resource"
             android:logo="drawable resource"
             android:manageSpaceActivity="string"
             android:name="string"
             android:permission="string"
             android:persistent=["true" | "false"]
             android:process="string"
             android:restoreAnyVersion=["true" | "false"]
             android:requiredAccountType="string"
             android:restrictedAccountType="string"
             android:supportsRtl=["true" | "false"]
             android:taskAffinity="string"
             android:testOnly=["true" | "false"]
             android:theme="resource or theme"
             android:uiOptions=["none" | "splitActionBarWhenNarrow"]
             android:usesCleartextTraffic=["true" | "false"]
             android:vmSafeMode=["true" | "false"] >
    . . .
</application>

<activity-alias android:enabled=["true" | "false"]
                android:exported=["true" | "false"]
                android:icon="drawable resource"
                android:label="string resource"
                android:name="string"
                android:permission="string"
                android:targetActivity="string" >
    . . .
</activity-alias>

>  The system uses the banner to represent an app in the Android TV home screen. Since the banner is displayed only in the home screen, it should only be specified by applications with an activity that handles the  CATEGORY_LEANBACK_LAUNCHER  intent.

> Starting from Android 3.0 (API level 11), a hardware-accelerated OpenGL renderer is available to applications, to improve performance for many common 2D graphics operations.

> android:requiredAccountType  android:restrictedAccountType -- This attribute was added in API level 18.

>During app development, StrictMode can be used to identify any cleartext traffic from the app: seeStrictMode.VmPolicy.Builder.detectCleartextNetwork().(This attribute was added in API level 23.)

> android:vmSafeMode

Indicates whether the app would like the virtual machine (VM) to operate in safe mode. The default value is  "false".

This attribute was added in API level 8 where a value of "true" disabled the Dalvik just-in-time (JIT) compiler.

This attribute was adapted in API level 22 where a value of "true" disabled the ART ahead-of-time (AOT) compiler.

>If your application is compatible with only small and normal screens, regardless of screen density, then you must specify eight different <screen> elements, because each screen size has four different density configurations. You must declare each one of these; any combination of size and density that you do notspecify is considered a screen configuration with which your application is not compatible.

 compatible-screens

<compatible-screens>
    <screen android:screenSize=["small" | "normal" | "large" | "xlarge"]
            android:screenDensity=["ldpi" | "mdpi" | "hdpi" | "xhdpi"
                                   | "280" | "360" | "420" | "480" | "560" ] />
    ...
</compatible-screens>

<manifest ... >
    ...
    <compatible-screens>
        <!-- all small size screens -->
        <screen android:screenSize="small" android:screenDensity="ldpi" />
        <screen android:screenSize="small" android:screenDensity="mdpi" />
        <screen android:screenSize="small" android:screenDensity="hdpi" />
        <screen android:screenSize="small" android:screenDensity="xhdpi" />
        <!-- all normal size screens -->
        <screen android:screenSize="normal" android:screenDensity="ldpi" />
        <screen android:screenSize="normal" android:screenDensity="mdpi" />
        <screen android:screenSize="normal" android:screenDensity="hdpi" />
        <screen android:screenSize="normal" android:screenDensity="xhdpi" />
    </compatible-screens>
    <application ... >
        ...
    <application>
</manifest>

> 

<data android:scheme="string"
      android:host="string"
      android:port="string"
      android:path="string"
      android:pathPattern="string"
      android:pathPrefix="string"
      android:mimeType="string" />

> 

<grant-uri-permission android:path="string"
                      android:pathPattern="string"
                      android:pathPrefix="string" />

>

<instrumentation android:functionalTest=["true" | "false"]
                 android:handleProfiling=["true" | "false"]
                 android:icon="drawable resource"
                 android:label="string resource"
                 android:name="string"
                 android:targetPackage="string" />

> 

<intent-filter android:icon="drawable resource"
               android:label="string resource"
               android:priority="integer" >
    . . .
</intent-filter>

》

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          package="string"
          android:sharedUserId="string"
          android:sharedUserLabel="string resource" 
          android:versionCode="integer"
          android:versionName="string"
          android:installLocation=["auto" | "internalOnly" | "preferExternal"] >
    . . .
</manifest>

》

<path-permission android:path="string"
                 android:pathPrefix="string"
                 android:pathPattern="string"
                 android:permission="string"
                 android:readPermission="string"
                 android:writePermission="string" />

》 

<permission android:description="string resource"
            android:icon="drawable resource"
            android:label="string resource"
            android:name="string"
            android:permissionGroup="string"
            android:protectionLevel=["normal" | "dangerous" | 
                                     "signature" | "signatureOrSystem"] />

》permission
<uses-permission> 
<permission-tree> 
<permission-group>

》

<permission-tree android:icon="drawable resource"
                 android:label="string resource" ]
                 android:name="string" />

》

<provider android:authorities="list"
          android:enabled=["true" | "false"]
          android:exported=["true" | "false"]
          android:grantUriPermissions=["true" | "false"]
          android:icon="drawable resource"
          android:initOrder="integer"
          android:label="string resource"
          android:multiprocess=["true" | "false"]
          android:name="string"
          android:permission="string"
          android:process="string"
          android:readPermission="string"
          android:syncable=["true" | "false"]
          android:writePermission="string" >
    . . .
</provider>