您好,登录后才能下订单哦!
密码登录
登录注册
点击 登录注册 即表示同意《亿速云用户服务条款》
这篇文章主要为大家展示了“Android开发之系统管理工具类的示例分析”,内容简而易懂,条理清晰,希望能够帮助大家解决疑惑,下面让小编带领大家一起研究并学习一下“Android开发之系统管理工具类的示例分析”这篇文章吧。
具体如下:
这是一个系统管理工具类,管理sd卡,判断网络,uri转换,获取屏幕宽高,获取网络类型,隐藏软键盘,复制文本到粘贴板,获取状态栏高度,获取当前进程等。
上代码
import java.io.File; import android.annotation.SuppressLint; import android.annotation.TargetApi; import android.app.Activity; import android.app.ActivityManager; import android.content.ClipData; import android.content.Context; import android.database.Cursor; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.net.Uri; import android.os.Build; import android.os.Environment; import android.os.StatFs; import android.provider.MediaStore; import android.text.TextUtils; import android.util.DisplayMetrics; import android.view.View; import android.view.inputmethod.InputMethodManager; @SuppressWarnings("deprecation") public class SystemUtil { public static final int NETTYPE_WIFI = 0x01; public static final int NETTYPE_CMWAP = 0x02; public static final int NETTYPE_CMNET = 0x03; /** 判断是否手机插入Sd卡 */ public static boolean sdCardUseable() { return Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED); } /** * 获取Sd卡的总容量 * * @return */ @SuppressLint("NewApi") public static long getSdCardTotalSize() { if(!sdCardUseable()){ return 0; } // 取得SD卡文件路径 File path = Environment.getExternalStorageDirectory(); StatFs sf = new StatFs(path.getPath()); // 获取单个数据块的大小(Byte) long blockSize = sf.getBlockSizeLong(); // 获取所有数据块数 long allBlocks = sf.getBlockCountLong(); // 返回SD卡大小 // return allBlocks * blockSize; //单位Byte // return (allBlocks * blockSize)/1024; //单位KB return (allBlocks * blockSize) / 1024 / 1024; // 单位MB } /** * 获取Sd卡的可用容量 * * @return */ @SuppressLint("NewApi") public static long getSdCardFreeSize() { if(!sdCardUseable()){ return 0; } // 取得SD卡文件路径 File path = Environment.getExternalStorageDirectory(); StatFs sf = new StatFs(path.getPath()); // 获取单个数据块的大小(Byte) long blockSize = sf.getBlockSizeLong(); // 空闲的数据块的数量 long freeBlocks = sf.getAvailableBlocksLong(); // 返回SD卡空闲大小 // return freeBlocks * blockSize; //单位Byte // return (freeBlocks * blockSize)/1024; //单位KB return (freeBlocks * blockSize) / 1024 / 1024; // 单位MB } /** * 判断是否联网或者漫游 * * @param context * @return boolean */ public static boolean hasNet(Context context) { // 获得ConnectivityManager的管理器 NetworkInfo info = ((ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE)).getActiveNetworkInfo(); if (info == null || !info.isConnected()) { return false; } if (info.isRoaming()) { // 漫游判断 return true; } return true; } /** 获得The data stream for the file */ public static String getUrlPath(Activity context, Uri uri) { String[] proj = { MediaStore.Images.Media.DATA }; Cursor cursor = context.managedQuery(uri, proj, null, null, null); int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA); cursor.moveToFirst(); return cursor.getString(column_index); } /** 从传入Uri获得真实的path */ public String getRealPathFromURI(Activity context, Uri contentUri) { // can post image String[] proj = { MediaStore.Images.Media.DATA }; Cursor cursor = context.managedQuery(contentUri, proj, // Which columns // to return null, // WHERE clause; which rows to return (all rows) null, // WHERE clause selection arguments (none) null); // Order-by clause (ascending by name) int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA); cursor.moveToFirst(); return cursor.getString(column_index); } /** 获得屏幕的宽度 */ public static int getScreenWidth(Activity context) { DisplayMetrics outMetrics = new DisplayMetrics(); context.getWindowManager().getDefaultDisplay().getMetrics(outMetrics); return outMetrics.widthPixels; } /** 获取屏幕的高度 */ public static int getScreenHeight(Activity context) { DisplayMetrics outMetrics = new DisplayMetrics(); context.getWindowManager().getDefaultDisplay().getMetrics(outMetrics); return outMetrics.heightPixels; } /** 获得网络的类型 */ public static int getNetworkType(Context context) { int netType = 0; ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo(); if (networkInfo == null) { // 判断是否联网 return netType; } int nType = networkInfo.getType(); // 获得 if (nType == ConnectivityManager.TYPE_MOBILE) { String extraInfo = networkInfo.getExtraInfo(); if (!TextUtils.isEmpty(extraInfo)) { if (extraInfo.toLowerCase().equals("cmnet")) { netType = NETTYPE_CMNET; } else { netType = NETTYPE_CMWAP; } } } else if (nType == ConnectivityManager.TYPE_WIFI) { netType = NETTYPE_WIFI; } return netType; } /** 隐藏软件盘 */ public static void hideSoftKeyborad(Activity context) { final View v = context.getWindow().peekDecorView(); // Retrieve the // current decor // view if (v != null && v.getWindowToken() != null) { InputMethodManager imm = (InputMethodManager) context // 获得输入方法的Manager .getSystemService(Context.INPUT_METHOD_SERVICE); imm.hideSoftInputFromWindow(v.getWindowToken(), 0); } } /** * 复制文本到剪切板 * * @param context * @param text */ @TargetApi(value = 11) @SuppressLint({ "NewApi", "NewApi" }) public static void copyText(Context context, String text) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) { android.content.ClipboardManager clipboardManager = (android.content.ClipboardManager) context .getSystemService(Context.CLIPBOARD_SERVICE); ClipData clipData = ClipData.newPlainText("label", text); clipboardManager.setPrimaryClip(clipData); } else { android.text.ClipboardManager clipboardManager = (android.text.ClipboardManager) context.getSystemService(Context.CLIPBOARD_SERVICE); clipboardManager.setText(text); } } /** * 获取状态栏高度 * * @return */ public static int getStatusBarHeight(Context context) { Class<?> c = null; Object obj = null; java.lang.reflect.Field field = null; int x = 0; int statusBarHeight = 0; try { c = Class.forName("com.android.internal.R$dimen"); obj = c.newInstance(); field = c.getField("status_bar_height"); x = Integer.parseInt(field.get(obj).toString()); statusBarHeight = context.getResources().getDimensionPixelSize(x); return statusBarHeight; } catch (Exception e) { e.printStackTrace(); } return statusBarHeight; } /** * 获取当前进程名 * @param context * @return 进程名 */ public static final String getProcessName(Context context) { String processName = null; // ActivityManager ActivityManager am = ((ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE)); while (true) { for (ActivityManager.RunningAppProcessInfo info : am.getRunningAppProcesses()) { if (info.pid == android.os.Process.myPid()) { processName = info.processName; break; } } // go home if (!TextUtils.isEmpty(processName)) { return processName; } // take a rest and again try { Thread.sleep(100L); } catch (InterruptedException ex) { ex.printStackTrace(); } } } }
以上是“Android开发之系统管理工具类的示例分析”这篇文章的所有内容,感谢各位的阅读!相信大家都有了一定的了解,希望分享的内容对大家有所帮助,如果还想学习更多知识,欢迎关注亿速云行业资讯频道!
免责声明:本站发布的内容(图片、视频和文字)以原创、转载和分享为主,文章观点不代表本网站立场,如果涉及侵权请联系站长邮箱:is@yisu.com进行举报,并提供相关证据,一经查实,将立刻删除涉嫌侵权内容。