Struct PackageManager

pub struct PackageManager { /* private fields */ }

用于检索与设备上当前安装的应用程序包相关的各种信息的类。您可以通过 Context.getPackageManager 找到此类。 注意：如果您的应用以 Android 11（API 级别 30）或更高版本为目标，则此类中的方法均会返回经过筛选的应用列表。

Implementations

impl PackageManager

pub const PERMISSION_GRANTED: i32 = 0i32

权限检查结果：如果权限已被授予给定的包，则由 checkPermission 返回此结果。

pub const PERMISSION_DENIED: i32 = -1i32

权限检查结果：如果尚未授予给定包权限，则由 checkPermission 返回此结果。

Methods from Deref<Target = GlobalRef>

pub fn as_obj(&self) -> &JObject<'static>

Get the object from the global ref

This borrows the ref and prevents it from being dropped as long as the JObject sticks around.

Methods from Deref<Target = JObject<'static>>

pub fn as_raw(&self) -> *mut _jobject

Returns the raw JNI pointer.

Trait Implementations

impl Debug for PackageManager

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Deref for PackageManager

type Target = GlobalRef

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl From<&GlobalRef> for PackageManager

fn from(obj: &GlobalRef) -> Self

Converts to this type from the input type.

impl Into<GlobalRef> for &PackageManager

fn into(self) -> GlobalRef

Converts this type into the (usually inferred) input type.

impl JObjNew for PackageManager

type Fields = ()

字段类型

fn _new(this: &GlobalRef, fields: Self::Fields) -> Self

从java对象创建本地对象。 this java对象引用。

fn null() -> Self

where Self: Sized, Self::Fields: Default,

创建空对象。

impl JObjRef for PackageManager

fn java_ref(&self) -> GlobalRef

获取java对象引用。

impl JType for PackageManager

const CLASS: &'static str = "android/content/pm/PackageManager"

java类的名称。

const OBJECT_SIG: &'static str = "Landroid/content/pm/PackageManager;"

对象的签名描述。

type Error = Error

错误类型。

const DIM: u8 = 0u8

数组维度，0表示不是数组

impl PartialEq for PackageManager

fn eq(&self, other: &Self) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl ToString for PackageManager

fn to_string(&self) -> String

Converts the given value to a String.