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Android快速开发系列10个常用工具类实例代码详解

作者：手机用户2502927203 | 来源：互联网 | 2021-12-11 18:43

今天特此整理出10个基本每个项目中都会使用的工具类，用于快速开发,对android开发常用工具类感兴趣的朋友跟随小编一起看看吧

打开大家手上的项目，基本都会有一大批的辅助类，今天特此整理出10个基本每个项目中都会使用的工具类，用于快速开发~~在此感谢群里给我发项目中工具类的兄弟/姐妹~

1、日志工具类L.java

package com.zhy.utils;

import android.util.Log;
/**
 * Log统一管理类
 * 
 * 
 * 
 */
public class L
{
 private L()
 {
 /* cannot be instantiated */
 throw new UnsupportedOperationException("cannot be instantiated");
 }
 public static boolean isDebug = true;// 是否需要打印bug，可以在application的onCreate函数里面初始化
 private static final String TAG = "way";
 // 下面四个是默认tag的函数
 public static void i(String msg)
 {
 if (isDebug)
 Log.i(TAG, msg);
 }
 public static void d(String msg)
 {
 if (isDebug)
 Log.d(TAG, msg);
 }
 public static void e(String msg)
 {
 if (isDebug)
 Log.e(TAG, msg);
 }
 public static void v(String msg)
 {
 if (isDebug)
 Log.v(TAG, msg);
 }
 // 下面是传入自定义tag的函数
 public static void i(String tag, String msg)
 {
 if (isDebug)
 Log.i(tag, msg);
 }
 public static void d(String tag, String msg)
 {
 if (isDebug)
 Log.i(tag, msg);
 }
 public static void e(String tag, String msg)
 {
 if (isDebug)
 Log.i(tag, msg);
 }
 public static void v(String tag, String msg)
 {
 if (isDebug)
 Log.i(tag, msg);
 }
}

网上看到的类，注释上应该原创作者的名字，很简单的一个类；网上也有很多提供把日志记录到SDCard上的，不过我是从来没记录过，所以引入个最简单的，大家可以进行评价是否需要扩充~~

2、Toast统一管理类

package com.zhy.utils;

import android.content.Context;
import android.widget.Toast;
/**
 * Toast统一管理类
 * 
 */
public class T
{
 private T()
 {
 /* cannot be instantiated */
 throw new UnsupportedOperationException("cannot be instantiated");
 }
 public static boolean isShow = true;
 /**
 * 短时间显示Toast
 * 
 * @param context
 * @param message
 */
 public static void showShort(Context context, CharSequence message)
 {
 if (isShow)
 Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
 }
 /**
 * 短时间显示Toast
 * 
 * @param context
 * @param message
 */
 public static void showShort(Context context, int message)
 {
 if (isShow)
 Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
 }
 /**
 * 长时间显示Toast
 * 
 * @param context
 * @param message
 */
 public static void showLong(Context context, CharSequence message)
 {
 if (isShow)
 Toast.makeText(context, message, Toast.LENGTH_LONG).show();
 }
 /**
 * 长时间显示Toast
 * 
 * @param context
 * @param message
 */
 public static void showLong(Context context, int message)
 {
 if (isShow)
 Toast.makeText(context, message, Toast.LENGTH_LONG).show();
 }
 /**
 * 自定义显示Toast时间
 * 
 * @param context
 * @param message
 * @param duration
 */
 public static void show(Context context, CharSequence message, int duration)
 {
 if (isShow)
 Toast.makeText(context, message, duration).show();
 }
 /**
 * 自定义显示Toast时间
 * 
 * @param context
 * @param message
 * @param duration
 */
 public static void show(Context context, int message, int duration)
 {
 if (isShow)
 Toast.makeText(context, message, duration).show();
 }
}

也是非常简单的一个封装，能省则省了~~

3、SharedPreferences封装类SPUtils

package com.zhy.utils;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Map;
import android.content.Context;
import android.content.SharedPreferences;
public class SPUtils
{
 /**
 * 保存在手机里面的文件名
 */
 public static final String FILE_NAME = "share_data";
 /**
 * 保存数据的方法，我们需要拿到保存数据的具体类型，然后根据类型调用不同的保存方法
 * 
 * @param context
 * @param key
 * @param object
 */
 public static void put(Context context, String key, Object object)
 {
 SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
 Context.MODE_PRIVATE);
 SharedPreferences.Editor editor = sp.edit();
 if (object instanceof String)
 {
 editor.putString(key, (String) object);
 } else if (object instanceof Integer)
 {
 editor.putInt(key, (Integer) object);
 } else if (object instanceof Boolean)
 {
 editor.putBoolean(key, (Boolean) object);
 } else if (object instanceof Float)
 {
 editor.putFloat(key, (Float) object);
 } else if (object instanceof Long)
 {
 editor.putLong(key, (Long) object);
 } else
 {
 editor.putString(key, object.toString());
 }
 SharedPreferencesCompat.apply(editor);
 }
 /**
 * 得到保存数据的方法，我们根据默认值得到保存的数据的具体类型，然后调用相对于的方法获取值
 * 
 * @param context
 * @param key
 * @param defaultObject
 * @return
 */
 public static Object get(Context context, String key, Object defaultObject)
 {
 SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
 Context.MODE_PRIVATE);
 if (defaultObject instanceof String)
 {
 return sp.getString(key, (String) defaultObject);
 } else if (defaultObject instanceof Integer)
 {
 return sp.getInt(key, (Integer) defaultObject);
 } else if (defaultObject instanceof Boolean)
 {
 return sp.getBoolean(key, (Boolean) defaultObject);
 } else if (defaultObject instanceof Float)
 {
 return sp.getFloat(key, (Float) defaultObject);
 } else if (defaultObject instanceof Long)
 {
 return sp.getLong(key, (Long) defaultObject);
 }
 return null;
 }
 /**
 * 移除某个key值已经对应的值
 * @param context
 * @param key
 */
 public static void remove(Context context, String key)
 {
 SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
 Context.MODE_PRIVATE);
 SharedPreferences.Editor editor = sp.edit();
 editor.remove(key);
 SharedPreferencesCompat.apply(editor);
 }
 /**
 * 清除所有数据
 * @param context
 */
 public static void clear(Context context)
 {
 SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
 Context.MODE_PRIVATE);
 SharedPreferences.Editor editor = sp.edit();
 editor.clear();
 SharedPreferencesCompat.apply(editor);
 }
 /**
 * 查询某个key是否已经存在
 * @param context
 * @param key
 * @return
 */
 public static boolean contains(Context context, String key)
 {
 SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
 Context.MODE_PRIVATE);
 return sp.contains(key);
 }
 /**
 * 返回所有的键值对
 * 
 * @param context
 * @return
 */
 public static Map getAll(Context context)
 {
 SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
 Context.MODE_PRIVATE);
 return sp.getAll();
 }
 /**
 * 创建一个解决SharedPreferencesCompat.apply方法的一个兼容类
 * 
 * @author zhy
 * 
 */
 private static class SharedPreferencesCompat
 {
 private static final Method sApplyMethod = findApplyMethod();
 /**
 * 反射查找apply的方法
 * 
 * @return
 */
 @SuppressWarnings({ "unchecked", "rawtypes" })
 private static Method findApplyMethod()
 {
 try
 {
 Class clz = SharedPreferences.Editor.class;
 return clz.getMethod("apply");
 } catch (NoSuchMethodException e)
 {
 }
 return null;
 }
 /**
 * 如果找到则使用apply执行，否则使用commit
 * 
 * @param editor
 */
 public static void apply(SharedPreferences.Editor editor)
 {
 try
 {
 if (sApplyMethod != null)
 {
  sApplyMethod.invoke(editor);
  return;
 }
 } catch (IllegalArgumentException e)
 {
 } catch (IllegalAccessException e)
 {
 } catch (InvocationTargetException e)
 {
 }
 editor.commit();
 }
 }
}

对SharedPreference的使用做了建议的封装，对外公布出put，get，remove，clear等等方法；注意一点，里面所有的commit操作使用了SharedPreferencesCompat.apply进行了替代，目的是尽可能的使用apply代替commit首先说下为什么，因为commit方法是同步的，并且我们很多时候的commit操作都是UI线程中，毕竟是IO操作，尽可能异步；所以我们使用apply进行替代，apply异步的进行写入；但是apply相当于commit来说是new API呢，为了更好的兼容，我们做了适配；SharedPreferencesCompat也可以给大家创建兼容类提供了一定的参考~~

4、单位转换类 DensityUtils

package com.zhy.utils;

import android.content.Context;
import android.util.TypedValue;
/**
 * 常用单位转换的辅助类
 * 
 * 
 * 
 */
public class DensityUtils
{
 private DensityUtils()
 {
 /* cannot be instantiated */
 throw new UnsupportedOperationException("cannot be instantiated");
 }
 /**
 * dp转px
 * 
 * @param context
 * @param val
 * @return
 */
 public static int dp2px(Context context, float dpVal)
 {
 return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
 dpVal, context.getResources().getDisplayMetrics());
 }
 /**
 * sp转px
 * 
 * @param context
 * @param val
 * @return
 */
 public static int sp2px(Context context, float spVal)
 {
 return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP,
 spVal, context.getResources().getDisplayMetrics());
 }
 /**
 * px转dp
 * 
 * @param context
 * @param pxVal
 * @return
 */
 public static float px2dp(Context context, float pxVal)
 {
 final float scale = context.getResources().getDisplayMetrics().density;
 return (pxVal / scale);
 }
 /**
 * px转sp
 * 
 * @param fontScale
 * @param pxVal
 * @return
 */
 public static float px2sp(Context context, float pxVal)
 {
 return (pxVal / context.getResources().getDisplayMetrics().scaledDensity);
 }
}

5、SD卡相关辅助类 SDCardUtils

package com.zhy.utils;

import java.io.File;
import android.os.Environment;
import android.os.StatFs;
/**
 * SD卡相关的辅助类
 * 
 * 
 * 
 */
public class SDCardUtils
{
 private SDCardUtils()
 {
 /* cannot be instantiated */
 throw new UnsupportedOperationException("cannot be instantiated");
 }
 /**
 * 判断SDCard是否可用
 * 
 * @return
 */
 public static boolean isSDCardEnable()
 {
 return Environment.getExternalStorageState().equals(
 Environment.MEDIA_MOUNTED);
 }
 /**
 * 获取SD卡路径
 * 
 * @return
 */
 public static String getSDCardPath()
 {
 return Environment.getExternalStorageDirectory().getAbsolutePath()
 + File.separator;
 }
 /**
 * 获取SD卡的剩余容量 单位byte
 * 
 * @return
 */
 public static long getSDCardAllSize()
 {
 if (isSDCardEnable())
 {
 StatFs stat = new StatFs(getSDCardPath());
 // 获取空闲的数据块的数量
 long availableBlocks = (long) stat.getAvailableBlocks() - 4;
 // 获取单个数据块的大小（byte）
 long freeBlocks = stat.getAvailableBlocks();
 return freeBlocks * availableBlocks;
 }
 return 0;
 }
 /**
 * 获取指定路径所在空间的剩余可用容量字节数，单位byte
 * 
 * @param filePath
 * @return 容量字节 SDCard可用空间，内部存储可用空间
 */
 public static long getFreeBytes(String filePath)
 {
 // 如果是sd卡的下的路径，则获取sd卡可用容量
 if (filePath.startsWith(getSDCardPath()))
 {
 filePath = getSDCardPath();
 } else
 {// 如果是内部存储的路径，则获取内存存储的可用容量
 filePath = Environment.getDataDirectory().getAbsolutePath();
 }
 StatFs stat = new StatFs(filePath);
 long availableBlocks = (long) stat.getAvailableBlocks() - 4;
 return stat.getBlockSize() * availableBlocks;
 }
 /**
 * 获取系统存储路径
 * 
 * @return
 */
 public static String getRootDirectoryPath()
 {
 return Environment.getRootDirectory().getAbsolutePath();
 }
}

6、屏幕相关辅助类 ScreenUtils

package com.zhy.utils;

import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Rect;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.WindowManager;
/**
 * 获得屏幕相关的辅助类
 * 
 * 
 * 
 */
public class ScreenUtils
{
 private ScreenUtils()
 {
 /* cannot be instantiated */
 throw new UnsupportedOperationException("cannot be instantiated");
 }
 /**
 * 获得屏幕高度
 * 
 * @param context
 * @return
 */
 public static int getScreenWidth(Context context)
 {
 WindowManager wm = (WindowManager) context
 .getSystemService(Context.WINDOW_SERVICE);
 DisplayMetrics outMetrics = new DisplayMetrics();
 wm.getDefaultDisplay().getMetrics(outMetrics);
 return outMetrics.widthPixels;
 }
 /**
 * 获得屏幕宽度
 * 
 * @param context
 * @return
 */
 public static int getScreenHeight(Context context)
 {
 WindowManager wm = (WindowManager) context
 .getSystemService(Context.WINDOW_SERVICE);
 DisplayMetrics outMetrics = new DisplayMetrics();
 wm.getDefaultDisplay().getMetrics(outMetrics);
 return outMetrics.heightPixels;
 }
 /**
 * 获得状态栏的高度
 * 
 * @param context
 * @return
 */
 public static int getStatusHeight(Context context)
 {
 int statusHeight = -1;
 try
 {
 Class<&＃63;> clazz = Class.forName("com.android.internal.R$dimen");
 Object object = clazz.newInstance();
 int height = Integer.parseInt(clazz.getField("status_bar_height")
  .get(object).toString());
 statusHeight = context.getResources().getDimensionPixelSize(height);
 } catch (Exception e)
 {
 e.printStackTrace();
 }
 return statusHeight;
 }
 /**
 * 获取当前屏幕截图，包含状态栏
 * 
 * @param activity
 * @return
 */
 public static Bitmap snapShotWithStatusBar(Activity activity)
 {
 View view = activity.getWindow().getDecorView();
 view.setDrawingCacheEnabled(true);
 view.buildDrawingCache();
 Bitmap bmp = view.getDrawingCache();
 int width = getScreenWidth(activity);
 int height = getScreenHeight(activity);
 Bitmap bp = null;
 bp = Bitmap.createBitmap(bmp, 0, 0, width, height);
 view.destroyDrawingCache();
 return bp;
 }
 /**
 * 获取当前屏幕截图，不包含状态栏
 * 
 * @param activity
 * @return
 */
 public static Bitmap snapShotWithoutStatusBar(Activity activity)
 {
 View view = activity.getWindow().getDecorView();
 view.setDrawingCacheEnabled(true);
 view.buildDrawingCache();
 Bitmap bmp = view.getDrawingCache();
 Rect frame = new Rect();
 activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
 int statusBarHeight = frame.top;
 int width = getScreenWidth(activity);
 int height = getScreenHeight(activity);
 Bitmap bp = null;
 bp = Bitmap.createBitmap(bmp, 0, statusBarHeight, width, height
 - statusBarHeight);
 view.destroyDrawingCache();
 return bp;
 }
}

7、App相关辅助类

package com.zhy.utils;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
/**
 * 跟App相关的辅助类
 * 
 * 
 * 
 */
public class AppUtils
{
 private AppUtils()
 {
 /* cannot be instantiated */
 throw new UnsupportedOperationException("cannot be instantiated");
 }
 /**
 * 获取应用程序名称
 */
 public static String getAppName(Context context)
 {
 try
 {
 PackageManager packageManager = context.getPackageManager();
 PackageInfo packageInfo = packageManager.getPackageInfo(
  context.getPackageName(), 0);
 int labelRes = packageInfo.applicationInfo.labelRes;
 return context.getResources().getString(labelRes);
 } catch (NameNotFoundException e)
 {
 e.printStackTrace();
 }
 return null;
 }
 /**
 * [获取应用程序版本名称信息]
 * 
 * @param context
 * @return 当前应用的版本名称
 */
 public static String getVersionName(Context context)
 {
 try
 {
 PackageManager packageManager = context.getPackageManager();
 PackageInfo packageInfo = packageManager.getPackageInfo(
  context.getPackageName(), 0);
 return packageInfo.versionName;
 } catch (NameNotFoundException e)
 {
 e.printStackTrace();
 }
 return null;
 }
}

8、软键盘相关辅助类KeyBoardUtils

package com.zhy.utils;

import android.content.Context;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;
/**
 * 打开或关闭软键盘
 * 
 * @author zhy
 * 
 */
public class KeyBoardUtils
{
 /**
 * 打卡软键盘
 * 
 * @param mEditText
 *   输入框
 * @param mContext
 *   上下文
 */
 public static void openKeybord(EditText mEditText, Context mContext)
 {
 InputMethodManager imm = (InputMethodManager) mContext
 .getSystemService(Context.INPUT_METHOD_SERVICE);
 imm.showSoftInput(mEditText, InputMethodManager.RESULT_SHOWN);
 imm.toggleSoftInput(InputMethodManager.SHOW_FORCED,
 InputMethodManager.HIDE_IMPLICIT_ONLY);
 }
 /**
 * 关闭软键盘
 * 
 * @param mEditText
 *   输入框
 * @param mContext
 *   上下文
 */
 public static void closeKeybord(EditText mEditText, Context mContext)
 {
 InputMethodManager imm = (InputMethodManager) mContext
 .getSystemService(Context.INPUT_METHOD_SERVICE);
 imm.hideSoftInputFromWindow(mEditText.getWindowToken(), 0);
 }
}

9、网络相关辅助类 NetUtils

package com.zhy.utils;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
/**
 * 跟网络相关的工具类
 * 
 * 
 * 
 */
public class NetUtils
{
 private NetUtils()
 {
 /* cannot be instantiated */
 throw new UnsupportedOperationException("cannot be instantiated");
 }
 /**
 * 判断网络是否连接
 * 
 * @param context
 * @return
 */
 public static boolean isConnected(Context context)
 {
 ConnectivityManager cOnnectivity= (ConnectivityManager) context
 .getSystemService(Context.CONNECTIVITY_SERVICE);
 if (null != connectivity)
 {
 NetworkInfo info = connectivity.getActiveNetworkInfo();
 if (null != info && info.isConnected())
 {
 if (info.getState() == NetworkInfo.State.CONNECTED)
 {
  return true;
 }
 }
 }
 return false;
 }
 /**
 * 判断是否是wifi连接
 */
 public static boolean isWifi(Context context)
 {
 ConnectivityManager cm = (ConnectivityManager) context
 .getSystemService(Context.CONNECTIVITY_SERVICE);
 if (cm == null)
 return false;
 return cm.getActiveNetworkInfo().getType() == ConnectivityManager.TYPE_WIFI;
 }
 /**
 * 打开网络设置界面
 */
 public static void openSetting(Activity activity)
 {
 Intent intent = new Intent("/");
 ComponentName cm = new ComponentName("com.android.settings",
 "com.android.settings.WirelessSettings");
 intent.setComponent(cm);
 intent.setAction("android.intent.action.VIEW");
 activity.startActivityForResult(intent, 0);
 }
}

10、Http相关辅助类 HttpUtils

package com.zhy.utils;

import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.URL;
/**
 * Http请求的工具类
 * 
 * @author zhy
 * 
 */
public class HttpUtils
{
 private static final int TIMEOUT_IN_MILLIOnS= 5000;
 public interface CallBack
 {
 void onRequestComplete(String result);
 }
 /**
 * 异步的Get请求
 * 
 * @param urlStr
 * @param callBack
 */
 public static void doGetAsyn(final String urlStr, final CallBack callBack)
 {
 new Thread()
 {
 public void run()
 {
 try
 {
  String result = doGet(urlStr);
  if (callBack != null)
  {
  callBack.onRequestComplete(result);
  }
 } catch (Exception e)
 {
  e.printStackTrace();
 }
 };
 }.start();
 }
 /**
 * 异步的Post请求
 * @param urlStr
 * @param params
 * @param callBack
 * @throws Exception
 */
 public static void doPostAsyn(final String urlStr, final String params,
 final CallBack callBack) throws Exception
 {
 new Thread()
 {
 public void run()
 {
 try
 {
  String result = doPost(urlStr, params);
  if (callBack != null)
  {
  callBack.onRequestComplete(result);
  }
 } catch (Exception e)
 {
  e.printStackTrace();
 }
 };
 }.start();
 }
 /**
 * Get请求，获得返回数据
 * 
 * @param urlStr
 * @return
 * @throws Exception
 */
 public static String doGet(String urlStr) 
 {
 URL url = null;
 HttpURLConnection cOnn= null;
 InputStream is = null;
 ByteArrayOutputStream baos = null;
 try
 {
 url = new URL(urlStr);
 cOnn= (HttpURLConnection) url.openConnection();
 conn.setReadTimeout(TIMEOUT_IN_MILLIONS);
 conn.setConnectTimeout(TIMEOUT_IN_MILLIONS);
 conn.setRequestMethod("GET");
 conn.setRequestProperty("accept", "*/*");
 conn.setRequestProperty("connection", "Keep-Alive");
 if (conn.getResponseCode() == 200)
 {
 is = conn.getInputStream();
 baos = new ByteArrayOutputStream();
 int len = -1;
 byte[] buf = new byte[128];
 while ((len = is.read(buf)) != -1)
 {
  baos.write(buf, 0, len);
 }
 baos.flush();
 return baos.toString();
 } else
 {
 throw new RuntimeException(" responseCode is not 200 ... ");
 }
 } catch (Exception e)
 {
 e.printStackTrace();
 } finally
 {
 try
 {
 if (is != null)
  is.close();
 } catch (IOException e)
 {
 }
 try
 {
 if (baos != null)
  baos.close();
 } catch (IOException e)
 {
 }
 conn.disconnect();
 }
 
 return null ;
 }
 /**
 * 向指定 URL 发送POST方法的请求
 * 
 * @param url
 *   发送请求的 URL
 * @param param
 *   请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
 * @return 所代表远程资源的响应结果
 * @throws Exception
 */
 public static String doPost(String url, String param) 
 {
 PrintWriter out = null;
 BufferedReader in = null;
 String result = "";
 try
 {
 URL realUrl = new URL(url);
 // 打开和URL之间的连接
 HttpURLConnection cOnn= (HttpURLConnection) realUrl
  .openConnection();
 // 设置通用的请求属性
 conn.setRequestProperty("accept", "*/*");
 conn.setRequestProperty("connection", "Keep-Alive");
 conn.setRequestMethod("POST");
 conn.setRequestProperty("Content-Type",
  "application/x-www-form-urlencoded");
 conn.setRequestProperty("charset", "utf-8");
 conn.setUseCaches(false);
 // 发送POST请求必须设置如下两行
 conn.setDoOutput(true);
 conn.setDoInput(true);
 conn.setReadTimeout(TIMEOUT_IN_MILLIONS);
 conn.setConnectTimeout(TIMEOUT_IN_MILLIONS);
 if (param != null && !param.trim().equals(""))
 {
 // 获取URLConnection对象对应的输出流
 out = new PrintWriter(conn.getOutputStream());
 // 发送请求参数
 out.print(param);
 // flush输出流的缓冲
 out.flush();
 }
 // 定义BufferedReader输入流来读取URL的响应
 in = new BufferedReader(
  new InputStreamReader(conn.getInputStream()));
 String line;
 while ((line = in.readLine()) != null)
 {
 result += line;
 }
 } catch (Exception e)
 {
 e.printStackTrace();
 }
 // 使用finally块来关闭输出流、输入流
 finally
 {
 try
 {
 if (out != null)
 {
  out.close();
 }
 if (in != null)
 {
  in.close();
 }
 } catch (IOException ex)
 {
 ex.printStackTrace();
 }
 }
 return result;
 }
}

总结

以上所述是小编给大家介绍的Android快速开发系列 10个常用工具类实例代码详解，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！