系统工具类

来源：互联网发布：阿里云服务器空间清理编辑：程序博客网时间：2024/06/14 23:35
public class SystemUtil {    /**     * 判断当前activity是否在栈顶     *     * @param context     * @return     */    public static boolean isRunningForeground(Context context) {        String packageName = getPackageName(context);        String topActivityClassName = getTopActivityName(context);        if (packageName != null && topActivityClassName != null                && topActivityClassName.startsWith(packageName)) {            return true;        } else {            return false;        }    }    /**     * 获取栈顶activity名称     *     * @param context     * @return     */    public static String getTopActivityName(Context context) {        String topActivityClassName = null;        ActivityManager activityManager = (ActivityManager) (context                .getSystemService(Context.ACTIVITY_SERVICE));        List<RunningTaskInfo> runningTaskInfos = activityManager                .getRunningTasks(1);        if (runningTaskInfos != null) {            ComponentName f = runningTaskInfos.get(0).topActivity;            topActivityClassName = f.getClassName();        }        return topActivityClassName;    }    /**     * 获取包名     *     * @param context     * @return     */    public static String getPackageName(Context context) {        String packageName = context.getPackageName();        return packageName;    }    /**     * 返回当前程序版本名     */    public static String getAppVersionName(Context context) {        String versionName = "";        try {            // ---get the package info---            PackageManager pm = context.getPackageManager();            PackageInfo pi = pm.getPackageInfo(context.getPackageName(), 0);            versionName = pi.versionName;            if (versionName == null || versionName.length() <= 0) {                return "";            }        } catch (Exception e) {            Log.e("VersionInfo", "Exception", e);        }        return versionName;    }    /**     * 返回当前程序版本号     */    public static int getAppVersionCode(Context context) {        int versonCode = 0;        try {            // ---get the package info---            PackageManager pm = context.getPackageManager();            PackageInfo pi = pm.getPackageInfo(context.getPackageName(), 0);            versonCode = pi.versionCode;        } catch (Exception e) {            Log.e("VersionInfo", "Exception", e);        }        return versonCode;    }}
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