Android 內建Apps 學習—Package Install Uninstall

1: 由Package Name擷取其package的環境變數

根據此變數可以擷取相應package的resource

 Context authContext = createPackageContext(desc.packageName, 0);
                icon = authContext.getResources().getDrawable(desc.iconId);

 label = authContext.getResources().getText(desc.labelId);          

 

2: 根據APK URI 擷取APP 資訊

 /*
     * Utility method to get application information for a given packageURI
     */
    public static  ApplicationInfo getApplicationInfo(Uri packageURI) {
        final String archiveFilePath = packageURI.getPath();
        PackageParser packageParser = new PackageParser(archiveFilePath);
        File sourceFile = new File(archiveFilePath);
        DisplayMetrics metrics = new DisplayMetrics();
        metrics.setToDefaults();
        PackageParser.Package pkg = packageParser.parsePackage(sourceFile, archiveFilePath, metrics, 0);
        if (pkg == null) {
            return null;
        }
        return pkg.applicationInfo;

apk時候已經安裝

    public static boolean isPackageAlreadyInstalled(Activity context, String pkgName) {
        List<PackageInfo> installedList = context.getPackageManager().getInstalledPackages(
                PackageManager.GET_UNINSTALLED_PACKAGES);
        int installedListSize = installedList.size();
        for(int i = 0; i < installedListSize; i++) {
            PackageInfo tmp = installedList.get(i);
            if(pkgName.equalsIgnoreCase(tmp.packageName)) {
                return true;
            }
        }
        return false;
    }

擷取app icon 和 name

    public static View initSnippetForInstalledApp(Activity pContext,
            ApplicationInfo appInfo, int snippetId) {
        View appSnippet = pContext.findViewById(snippetId);
        String pkgName = appInfo.packageName;
        PackageManager pm = pContext.getPackageManager();
        CharSequence label = appInfo.loadLabel(pm);
        Drawable icon = appInfo.loadIcon(pm);
        ((ImageView)appSnippet.findViewById(R.id.app_icon)).setImageDrawable(icon);
        ((TextView)appSnippet.findViewById(R.id.app_name)).setText(label);
        return appSnippet;
    }

 

安裝APP 代碼

PackageManager pm = getPackageManager();

  installFlags |= PackageManager.INSTALL_REPLACE_EXISTING;

 String installerPackageName = getIntent().getStringExtra(
                Intent.EXTRA_INSTALLER_PACKAGE_NAME);
        PackageInstallObserver observer = new PackageInstallObserver();
        pm.installPackage(mPackageURI, observer, installFlags, installerPackageName);

    class PackageInstallObserver extends IPackageInstallObserver.Stub {
        public void packageInstalled(String packageName, int returnCode) {
            

        }
    }

卸載App

        PackageDeleteObserver observer = new PackageDeleteObserver();
        getPackageManager().deletePackage(mAppInfo.packageName, observer, 0);

    class PackageDeleteObserver extends IPackageDeleteObserver.Stub {
        public void packageDeleted(boolean succeeded) {
            Message msg = mHandler.obtainMessage(UNINSTALL_COMPLETE);
            msg.arg1 = succeeded?SUCCEEDED:FAILED;
            mHandler.sendMessage(msg);
        }
    }