Android(安卓)- 开发常用工具类Utils
16lz
2022-04-19
转载请注明出处：https://blog.csdn.net/mythmayor/article/details/72843153
1.ToastUtil.class(展示Toast的工具类)
import android.content.Context;import android.widget.Toast;/** * Created by mythmayor on 2016/12/14. */public class ToastUtil { private static String oldMsg; protected static Toast toast = null; private static long oneTime = 0; private static long twoTime = 0; public static void showToast(Context context, String s) { if (toast == null) { toast = Toast.makeText(context, s, Toast.LENGTH_SHORT); toast.show(); oneTime = System.currentTimeMillis(); } else { twoTime = System.currentTimeMillis(); if (s.equals(oldMsg)) { if (twoTime - oneTime > Toast.LENGTH_SHORT) { toast.show(); } } else { oldMsg = s; toast.setText(s); toast.show(); } } oneTime = twoTime; } public static void showToast(Context context, int resId) { showToast(context, context.getString(resId)); }}2.PrefUtil.class(管理SharedPreferences的工具类)
import android.content.Context;import android.content.SharedPreferences;/** * Created by mythmayor on 2016/12/14. * * 专门访问和设置SharePreference的工具类, 保存和配置一些设置信息 */
public class PrefUtil { private static final String SHARE_PREFS_NAME = "mythmayor"; public static void putBoolean(Context ctx, String key, boolean value) { SharedPreferences pref = ctx.getSharedPreferences(SHARE_PREFS_NAME, Context.MODE_PRIVATE); pref.edit().putBoolean(key, value).commit(); } public static boolean getBoolean(Context ctx, String key, boolean defaultValue) { SharedPreferences pref = ctx.getSharedPreferences(SHARE_PREFS_NAME, Context.MODE_PRIVATE); return pref.getBoolean(key, defaultValue); } public static void putString(Context ctx, String key, String value) { SharedPreferences pref = ctx.getSharedPreferences(SHARE_PREFS_NAME, Context.MODE_PRIVATE); pref.edit().putString(key, value).commit(); } public static String getString(Context ctx, String key, String defaultValue) { SharedPreferences pref = ctx.getSharedPreferences(SHARE_PREFS_NAME, Context.MODE_PRIVATE); return pref.getString(key, defaultValue); } public static void putInt(Context ctx, String key, int value) { SharedPreferences pref = ctx.getSharedPreferences(SHARE_PREFS_NAME, Context.MODE_PRIVATE); pref.edit().putInt(key, value).commit(); } public static int getInt(Context ctx, String key, int defaultValue) { SharedPreferences pref = ctx.getSharedPreferences(SHARE_PREFS_NAME, Context.MODE_PRIVATE); return pref.getInt(key, defaultValue); } public static void clear(Context ctx) { SharedPreferences pref = ctx.getSharedPreferences(SHARE_PREFS_NAME, Context.MODE_PRIVATE); pref.edit().clear().commit(); }}3.IntentUtil.class(Activity跳转的工具类)
import android.content.Context;import android.content.Intent;import android.os.Bundle;/** * Created by mythmayor on 2016/12/14. */public class IntentUtil { public static void startActivity(Context context, Class<?> cls) { Intent intent = new Intent(); intent.setClass(context, cls); context.startActivity(intent); } public static void startActivityWithExtra(Context context, Bundle bundle, Class<?> cls) { Intent intent = new Intent(); intent.putExtras(bundle); intent.setClass(context, cls); context.startActivity(intent); } public static void startActivityClearTask(Context context, Class<?> cls) { Intent intent = new Intent(); intent.setClass(context, cls); intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK); context.startActivity(intent); } public static void startActivityClearTaskWithExtra(Context context, Bundle bundle, Class<?> cls) { Intent intent = new Intent(); intent.putExtras(bundle); intent.setClass(context, cls); intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NEW_TASK); context.startActivity(intent); } public static void startIntentActivity(Context context, String mTitle, String url, Class<?> cls) { Intent intent = new Intent(); intent.setClass(context, cls); intent.putExtra(MyConstant.INTENT_EXTRA_TITLE, mTitle); intent.putExtra(MyConstant.INTENT_EXTRA_URL, url); context.startActivity(intent); }}4.FileUtil.class(文件管理工具类)
import java.io.File;import java.text.DecimalFormat;/** * Created by mythmayor on 2016/12/26. */public class FileUtil { /** * 递归计算文件夹大小 * * @param f * @return * @throws Exception */ public static long getFileSize(File f) throws Exception { long size = 0; File[] flist = f.listFiles(); for (int i = 0; i < flist.length; i++) { if (flist[i].isDirectory()) { size = size + getFileSize(flist[i]); } else { size = size + flist[i].length(); } } return size; } /** * 得到字符串方式的文件大小 * * @param fileS ,单位b * @return */ public static String FormetFileSize(long fileS) { DecimalFormat df = new DecimalFormat("0.00"); String fileSizeString; if (fileS < 1024) { fileSizeString = df.format((double) fileS) + "B"; } else if (fileS < 1048576) { fileSizeString = df.format((double) fileS / 1024) + "K"; } else if (fileS < 1073741824) { fileSizeString = df.format((double) fileS / 1048576) + "M"; } else { fileSizeString = df.format((double) fileS / 1073741824) + "G"; } return fileSizeString; }}5.DensityUtil.class(单位转换和获取屏幕宽高的工具类)
import android.app.Activity;import android.content.Context;import android.util.DisplayMetrics;/** * Created by mythmayor on 2016/12/14. */public class DensityUtil { /** * 将px值转换为 dip或dp值，保证尺寸大小不变 * * @param pxValue 像素值 * @param context Context 对象 * @return dp值 */ public static int px2dip(float pxValue, Context context) { float scale = getDensity(context); return (int) (pxValue / scale + 0.5f); } /** * 将dip或dp值转换为px值，保证尺寸大小不变 * * @param dipValue dip数值 * @param context Context 对象 * @return 像素值 */ public static int dip2px(float dipValue, Context context) { float scale = getDensity(context); return (int) (dipValue * scale + 0.5f); } /** * 将px值转换为sp值，保证文字大小不变 * * @param pxValue 像素值 * @param context Context 对象 * @return 返回sp数值 */ public static int px2sp(float pxValue, Context context) { float scale = getDensity(context); return (int) (pxValue / scale + 0.5f); } /** * 将sp值转换为px值，保证文字大小不变 * * @param spValue sp数值 * @param context Context 对象 * @return 返回像素值 */ public static int sp2px(float spValue, Context context) { float scale = getDensity(context); return (int) (spValue * scale + 0.5f); } /** * 取得手机屏幕的密度 * * @param context 上下文 * @return 手机屏幕的密度 */ public static float getDensity(Context context) { float scale = context.getResources().getDisplayMetrics().density; return scale; } /** * 获取屏幕高 * @param activity * @return 手机屏幕的高度 */ public static int getScreenHeight(Activity activity) { DisplayMetrics dm = new DisplayMetrics(); activity.getWindowManager().getDefaultDisplay().getMetrics(dm); return dm.heightPixels; } /** * 获取屏幕宽 * @param activity * @return 手机屏幕的宽度 */ public static int getScreenWidth(Activity activity) { DisplayMetrics dm = new DisplayMetrics(); activity.getWindowManager().getDefaultDisplay().getMetrics(dm); return dm.widthPixels; }}6.ResourceUtil.class(获取资源文件的工具类)
import android.app.Activity;import android.content.Context;import android.content.res.Resources;import android.graphics.drawable.Drawable;import android.util.DisplayMetrics;public class CommonUtil { /** * 获取Resource对象 */ public static Resources getResources() { return MainApplication.getContext().getResources(); } /** * 获取Drawable资源 */ public static Drawable getDrawable(int resId) { return getResources().getDrawable(resId); } /** * 获取字符串资源 */ public static String getString(int resId) { return getResources().getString(resId); } /** * 获取color资源 */ public static int getColor(int resId) { return getResources().getColor(resId); } /** * 获取dimens资源 */ public static float getDimens(int resId) { return getResources().getDimension(resId); } /** * 获取字符串数组资源 */ public static String[] getStringArray(int resId) { return getResources().getStringArray(resId); }7.DateUtil.class(日期时间转换的工具类)
import android.annotation.SuppressLint;import android.text.format.Time;import java.text.SimpleDateFormat;import java.util.Date;/** * 时间、日期转换工具 * Created by mythmayor on 2016/9/14. */public class DateUtils { /** * 获取当前时间 * * @return 年月日时分秒字符串 */ public static String getCurrentTime() { Time time = new Time("GMT+8"); time.setToNow(); String year = "" + time.year; int imonth = time.month + 1; String month = imonth > 9 ? "" + imonth : "0" + imonth; String day = time.monthDay > 9 ? "" + time.monthDay : "0" + time.monthDay; String hour = (time.hour + 8) > 9 ? "" + (time.hour + 8) : "0" + (time.hour + 8); String minute = time.minute > 9 ? "" + time.minute : "0" + time.minute; String sec = time.second > 9 ? "" + time.second : "0" + time.second; String currentTime = year + month + day + hour + minute + sec; return currentTime; } //获取 日期/时/分/秒 @SuppressLint("SimpleDateFormat") public static String getDateTime(long time) { SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); String date = sdf.format(new Date(time)); return date; } //获取 日期/时/分 @SuppressLint("SimpleDateFormat") public static String getHourMinute(long time) { SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日HH时mm分"); String date = sdf.format(new Date(time)); return date; } //获取 日期年月日 @SuppressLint("SimpleDateFormat") public static String getYearMonthDay(long time) { SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日"); String date = sdf.format(new Date(time)); return date; } //获取日期年月 public static String getYearMonth(long time){ SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月"); String date = sdf.format(new Date(time)); return date; } //获取日期年月 public static String getYearMonth2(long time){ SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM"); String date = sdf.format(new Date(time)); return date; } //获取日期年 public static String getYear(long time){ SimpleDateFormat sdf = new SimpleDateFormat("yyyy年"); String date = sdf.format(new Date(time)); return date; } //获取 时/分 public static String getTime(long time) { SimpleDateFormat sdf = new SimpleDateFormat("HH:mm"); String date = sdf.format(new Date(time)); return date; }}8.GlideCacheUtil.class(管理Glide产生的缓存的工具类)
/** * Created by mythmayor on 2017/2/22. */import android.content.Context;import android.os.Looper;import android.text.TextUtils;import com.bumptech.glide.Glide;import com.bumptech.glide.load.engine.cache.ExternalCacheDiskCacheFactory;import com.bumptech.glide.load.engine.cache.InternalCacheDiskCacheFactory;import java.io.File;import java.math.BigDecimal;/**Glide缓存工具类 * Created by mythmayor on 2016/10/10. */public class GlideCacheUtil { private static GlideCacheUtil inst; public static GlideCacheUtil getInstance() { if (inst == null) { inst = new GlideCacheUtil(); } return inst; } /** * 清除图片磁盘缓存 */ public void clearImageDiskCache(final Context context) { try { if (Looper.myLooper() == Looper.getMainLooper()) { new Thread(new Runnable() { @Override public void run() { Glide.get(context).clearDiskCache();// BusUtil.getBus().post(new GlideCacheClearSuccessEvent()); } }).start(); } else { Glide.get(context).clearDiskCache(); } } catch (Exception e) { e.printStackTrace(); } } /** * 清除图片内存缓存 */ public void clearImageMemoryCache(Context context) { try { if (Looper.myLooper() == Looper.getMainLooper()) { //只能在主线程执行 Glide.get(context).clearMemory(); } } catch (Exception e) { e.printStackTrace(); } } /** * 清除图片所有缓存 */ public void clearImageAllCache(Context context) { clearImageDiskCache(context); clearImageMemoryCache(context); String ImageExternalCatchDir=context.getExternalCacheDir()+ ExternalCacheDiskCacheFactory.DEFAULT_DISK_CACHE_DIR; deleteFolderFile(ImageExternalCatchDir, true); } /** * 获取Glide造成的缓存大小 * * @return CacheSize */ public String getCacheSize(Context context) { try { return getFormatSize(getFolderSize(new File(context.getCacheDir() + "/"+ InternalCacheDiskCacheFactory.DEFAULT_DISK_CACHE_DIR))); } catch (Exception e) { e.printStackTrace(); } return ""; } /** * 获取指定文件夹内所有文件大小的和 * * @param file file * @return size * @throws Exception */ private long getFolderSize(File file) throws Exception { long size = 0; try { File[] fileList = file.listFiles(); for (File aFileList : fileList) { if (aFileList.isDirectory()) { size = size + getFolderSize(aFileList); } else { size = size + aFileList.length(); } } } catch (Exception e) { e.printStackTrace(); } return size; } /** * 删除指定目录下的文件，这里用于缓存的删除 * * @param filePath filePath * @param deleteThisPath deleteThisPath */ private void deleteFolderFile(String filePath, boolean deleteThisPath) { if (!TextUtils.isEmpty(filePath)) { try { File file = new File(filePath); if (file.isDirectory()) { File files[] = file.listFiles(); for (File file1 : files) { deleteFolderFile(file1.getAbsolutePath(), true); } } if (deleteThisPath) { if (!file.isDirectory()) { file.delete(); } else { if (file.listFiles().length == 0) { file.delete(); } } } } catch (Exception e) { e.printStackTrace(); } } } /** * 格式化单位 * * @param size size * @return size */ private static String getFormatSize(double size) { double kiloByte = size / 1024; if (kiloByte < 1) { return size + "B"; } double megaByte = kiloByte / 1024; if (megaByte < 1) { BigDecimal result1 = new BigDecimal(Double.toString(kiloByte)); return result1.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "KB"; } double gigaByte = megaByte / 1024; if (gigaByte < 1) { BigDecimal result2 = new BigDecimal(Double.toString(megaByte)); return result2.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "MB"; } double teraBytes = gigaByte / 1024; if (teraBytes < 1) { BigDecimal result3 = new BigDecimal(Double.toString(gigaByte)); return result3.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "GB"; } BigDecimal result4 = new BigDecimal(teraBytes); return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "TB"; }}9.JsonUtil.class(管理Json数据的工具类)
import org.json.JSONArray;import org.json.JSONException;import org.json.JSONObject;import java.util.ArrayList;import java.util.HashMap;import java.util.Iterator;import java.util.List;import java.util.Map;public class JsonUtils { public static Map jsonToMap(String jsonString) { Map map = new HashMap(); try { JSONObject json = new JSONObject(jsonString); Iterator<?> it = json.keys(); String key = null; Object value = null; while (it.hasNext()) { key = it.next().toString(); value = json.get(key); if (value.toString().equals("null") || value.toString().equals("")) { value = ""; } map.put(key, value); } } catch (JSONException e) { // TODO Auto-generated catch block e.printStackTrace(); return null; } return map; } public static JSONObject mapToJson(@SuppressWarnings("rawtypes") Map map) { JSONObject json = null; json = new JSONObject(map); return json; } public static List> jsonToList(String jsonArrayString) { List> list = new ArrayList>(); try { JSONArray array = new JSONArray(jsonArrayString); for (int i = 0; i < array.length(); i++) { JSONObject json = array.getJSONObject(i); Map map = jsonToMap(json.toString()); list.add(map); } } catch (JSONException e) { e.printStackTrace(); return null; } return list; } /** * @param json * @return */ public static Map jsonToMap(JSONObject json) { Map map = new HashMap(); try { Iterator<?> it = json.keys(); String key = null; Object value = null; while (it.hasNext()) { key = it.next().toString(); value = json.get(key); if (value.toString().equals("null") || value.toString().equals("")) { value = ""; } map.put(key, value); } } catch (JSONException e) { e.printStackTrace(); return null; } return map; } /** * @param array * @return */ public static List> jsonToList(JSONArray array) { List> list = new ArrayList>(); try { for (int i = 0; i < array.length(); i++) { JSONObject json = array.getJSONObject(i); Map map = jsonToMap(json.toString()); list.add(map); } } catch (JSONException e) { e.printStackTrace(); return null; } return list; } /** * @param json * @param name * @return */ public static int getInt(JSONObject json, String name) { if (json.has(name)) { try { if (!json.getString(name).equals("null") & json.getString(name) != "") return json.getInt(name); return -100; } catch (JSONException e) { e.printStackTrace(); } } return 0; } /** * @param array * @param index * @return */ public static int getInt(JSONArray array, int index) { try { return array.getInt(index); } catch (JSONException e) { e.printStackTrace(); } return 0; } /** * @param json * @param name * @return */ public static String getString(JSONObject json, String name) { if (json.has(name)) { try { if (json.has(name) && !json.getString(name).equals("null") && json.getString(name) != "") return json.getString(name); return ""; } catch (JSONException e) { e.printStackTrace(); } } return ""; } /** * @param array * @param index * @return */ public static String getString(JSONArray array, int index) { String s = ""; try { s = array.getString(index); } catch (JSONException e) { e.printStackTrace(); } return s; } /** * @param json * @param arrayName * @return */ public static JSONArray getJSONArray(JSONObject json, String arrayName) { JSONArray array = new JSONArray(); try { if (json.has(arrayName)) array = json.getJSONArray(arrayName); } catch (JSONException e) { e.printStackTrace(); } return array; } /** * @param array * @param index * @return */ public static JSONObject getJSONObject(JSONArray array, int index) { JSONObject json = new JSONObject(); try { json = array.getJSONObject(index); } catch (JSONException e) { // TODO Auto-generated catch block e.printStackTrace(); } return json; } /** * @param json * @param name * @return */ public static JSONObject getJSONObject(JSONObject json, String name) { JSONObject json2 = new JSONObject(); try { if (json.has(name)) json2 = json.getJSONObject(name); } catch (JSONException e) { e.printStackTrace(); } return json2; }// public static String resolveUri(String uri){// return Constants.URI+uri;// }} 10.MyCountDownTimer.class(验证码倒计时及重新发送验证码的工具类)
import android.os.CountDownTimer;import android.widget.Button;/** * Created by mythmayor on 2017/4/17. */public class MyCountDownTimer extends CountDownTimer { private Button mBtn; private int mEnable; private int mDisable; /** * @param millisInFuture The number of millis in the future from the call * to {@link #start()} until the countdown is done and {@link #onFinish()} * is called. * @param countDownInterval The interval along the way to receive * {@link #onTick(long)} callbacks. */ public MyCountDownTimer(long millisInFuture, long countDownInterval, Button btn, int enable, int disable) { super(millisInFuture, countDownInterval); mBtn = btn; mEnable = enable; mDisable = disable; } //计时过程 @Override public void onTick(long l) { //防止计时过程中重复点击 mBtn.setClickable(false); mBtn.setText(l / 1000 + "s"); //设置按钮背景色 mBtn.setBackgroundResource(mDisable); } //计时完毕的方法 @Override public void onFinish() { //重新给Button设置文字 mBtn.setText("重新获取验证码"); //设置可点击 mBtn.setClickable(true); //设置按钮背景色 mBtn.setBackgroundResource(mEnable); }}11.ProgressDlgUtil.class(ProgressDialog使用的工具类)
import android.app.ProgressDialog;import android.content.Context;/** * Created by mythmayor on 2017/3/29. */public class ProgressDlgUtil { private static ProgressDialog progressDlg = null; /** * 启动进度条 * @param ctx 当前的activity * @param content 进度条显示的信息 */ public static void show(Context ctx, String content) { if (null == progressDlg) { progressDlg = new ProgressDialog(ctx); progressDlg.setProgressStyle(ProgressDialog.STYLE_SPINNER);// 设置进度条的形式为圆形转动的进度条 //progressDlg.setTitle("提示");//设置进度条标题 progressDlg.setMessage(content);//提示的消息 progressDlg.setIndeterminate(false); progressDlg.setCancelable(false); //progressDlg.setIcon(R.drawable.ic_launcher_scale); progressDlg.show(); } } /** * 结束进度条 */ public static void dismiss() { if (null != progressDlg) { progressDlg.dismiss(); progressDlg = null; } }}更多相关文章
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