实习笔记-10

读取软件

• 声明权限

<uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES" />
<!-- 对于安卓11开始 -->
<uses-permission android:name="android.permission.QUERY_ALL_PACKAGES"
        tools:ignore="QueryAllPackagesPermission" />
<queries>
    <intent>
        <action android:name="android.intent.action.MAIN" />
    </intent>
</queries>

val pm = context.applicationContext.packageManager
val installedApplications = pm.getInstalledApplications(0)
installedApplications.forEach {info ->
    //handle info
}

• 该操作比较耗时,在新线程或协程job中执行

获取应用Label(应用名) , 应用图标和应用安装时间

info.loadIcon(pm)
pm.getApplicationLabel(info)
pm.getPackageInfo(name, 0).firstInstallTime

卸载软件

• 发送intent

val intent = Intent(Intent.ACTION_DELETE)
intent.data = Uri.parse("package:$packageName")
intent.putExtra(Intent.EXTRA_RETURN_RESULT, true)
mStartActivity.launch(intent)

• 注册StartActivityForResult

private val mStartActivity =
    registerForActivityResult(ActivityResultContracts.StartActivityForResult()) {
        val adapter =
            binding.rvSearchResult.adapter as AppsAdapter
        adapter.deletionResult(it != null && it.resultCode == Activity.RESULT_OK)
    }

ActivityResultContract

//第一步，注册交互数据回调监听
val contact = registerForActivityResult(ActivityResultContracts.PickContact()) { uri : Uri? ->
      //如果Uri为null，说明用户没有操作直接返回，这里代码会在下面补贴出来，因为涉及跨进程交互，代码比较长，不想贴这里影响阅读效率
     ……
}

//第二步，intent，和原来一样
xxx.setOnClickListener {
    val intent = Intent(Intent.ACTION_PICK)
    intent.addCategory(Intent.CATEGORY_DEFAULT)
    intent.setType("vnd.android.cursor.dir/phone_v2")
    contact.launch(intent)
}