作爲一個有系統權限的Launcher應該乾的事情

一個有個性的Launcher應該乾的事情有以下

第一步是把自己註冊成默認程序

private fun makeSelfDefaultLauncher() {
    val filter = IntentFilter()
    filter.addAction(Intent.ACTION_MAIN)
    filter.addCategory(Intent.CATEGORY_LAUNCHER)
    filter.addCategory(Intent.CATEGORY_HOME)
    filter.addCategory(Intent.CATEGORY_DEFAULT)

    val component = ComponentName(applicationContext.packageName, LaunceActivity::class.qualifiedName)
    val components = arrayOf<ComponentName>(ComponentName("com.android.launcher", "com.android.launcher.Launcher"), component)

    val pm = packageManager
    pm.clearPackagePreferredActivities("com.android.launcher")
    pm.addPreferredActivity(filter, IntentFilter.MATCH_CATEGORY_EMPTY, components, component)
}

第二步刪除舊版的程序

private fun removeDiscardLauncher() {
    val packages = packageManager.getInstalledPackages(0)
    for (pg in packages) {
        val pgName = pg.applicationInfo.packageName
        if (pgName.contains("com.jian.launcher")) {
            val info = packageManager.getPackageInfo(pgName, PackageManager.GET_CONFIGURATIONS)
            val pgVersion = info.versionCode
            if (pgVersion < BuildConfig.VERSION_CODE) {
                uninstallAppSilence(pgName)
            }
        }
    }
}
private fun uninstallAppSilence(packageName: String) {
    val cmd = "system/bin/pm uninstall " + packageName

    var process: Process? = null
    try {
        process = Runtime.getRuntime().exec(cmd)
        process.waitFor();

    } catch (e: Exception) {
        e.printStackTrace()
    } finally {
        try {
            process?.destroy()
        } catch (e: Exception) {
            e.printStackTrace()
        }
    }
}