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android常用方法

news 2025/8/3 23:30:12

获取应用安装来源

    private String getAppInstaller(Context context, String packageName) {return context.getPackageManager().getInstallerPackageName(packageName);}

判断是否系统应用

在/system/app 或者 /system/priv-app目录下的应用。

    public boolean isSystem(Context context, String packageName) {try {PackageManager packageManager = context.getPackageManager();ApplicationInfo appInfo = packageManager.getApplicationInfo(packageName, 0);if ((appInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) {return true;}if ((appInfo.flags & ApplicationInfo.FLAG_UPDATED_SYSTEM_APP) != 0) {return true;}} catch (PackageManager.NameNotFoundException e) {return false;}return false;}

获取屏幕的高度

包括状态栏和导航栏高度。

    public int getFullHeight(){WindowManager windowManager = (WindowManager) getSystemService(Context.WINDOW_SERVICE);DisplayMetrics metrics = new DisplayMetrics();windowManager.getDefaultDisplay().getRealMetrics(metrics);int fullWindowHeight = metrics.heightPixels;return fullWindowHeight;}

获取导航栏的高度

    public int getNavigationBarHeight() {Context context = this;int result = 0;int resourceId = context.getResources().getIdentifier("navigation_bar_height", "dimen", "android");if (resourceId > 0) {result = context.getResources().getDimensionPixelSize(resourceId);}return result;}

获取状态栏的高度

public int getStatusBarHeight(Context context) {int statusBarHeight = 0;Resources resources = context.getResources();int resourceId = resources.getIdentifier("status_bar_height", "dimen", "android");if (resourceId > 0) {statusBarHeight = resources.getDimensionPixelSize(resourceId);}return statusBarHeight;
}