本文主要是介绍Log,Toast,SPUtil,Density,SDCard,ScreenUtil,AppVersion,KeyBoard,NetWork,HttpUtil工具类,希望对大家解决编程问题提供一定的参考价值,需要的开发者们随着小编来一起学习吧!
转载请标明出处:http://blog.csdn.net/lmj623565791/article/details/38965311,本文出自【张鸿洋的博客】
最近统一整理下工具类,以下是栏目,慢慢的就会越来越丰富
http://blog.csdn.net/u013210620/article/category/6251289
1、LogUtil
package com.example.androidutils; import android.util.Log;/** * Log统一管理类 * * * */
public class L
{ private L() { 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 = "geek"; // 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); }
}
2、Toast管理类
package com.example.androidutils; import android.content.Context;
import android.widget.Toast;/** * Toast统一管理类 * */
public class T
{ private T() { 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(); } }
3、SPUtils工具类
package com.example.androidutils;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<String, ?> 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();}}}
4、DensityUtils
package com.example.androidutils;import android.content.Context;
import android.util.TypedValue;/*** 常用单位转换的辅助类* * * */
public class DensityUtils {private DensityUtils() {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、SDCardUtils
package com.example.androidutils;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() {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;}/*** * 获取手机内部可用空间大小* * @return*/public static long getAvailableInternalMemorySize() {File path = Environment.getDataDirectory();StatFs stat = new StatFs(path.getPath());long blockSize = stat.getBlockSize();long availableBlocks = stat.getAvailableBlocks();return availableBlocks * blockSize;}/*** * 获取手机内部总空间大小* * @return*/public static long getTotalInternalMemorySize() {File path = Environment.getDataDirectory();// Gets the Android data// directoryStatFs stat = new StatFs(path.getPath());long blockSize = stat.getBlockSize(); // 每个block 占字节数long totalBlocks = stat.getBlockCount(); // block总数return totalBlocks * blockSize;}/*** * 获取手机外部可用空间大小* * @return*/public static long getAvailableExternalMemorySize() {if (isSDCardEnable()) {File path = Environment.getExternalStorageDirectory();// 获取SDCard根目录StatFs stat = new StatFs(path.getPath());long blockSize = stat.getBlockSize();long availableBlocks = stat.getAvailableBlocks();return availableBlocks * blockSize;} else {return -1;}}/*** * 获取手机外部总空间大小* * @return*/public static long getTotalExternalMemorySize() {if (isSDCardEnable()) {File path = Environment.getExternalStorageDirectory(); // 获取SDCard根目录StatFs stat = new StatFs(path.getPath());long blockSize = stat.getBlockSize();long totalBlocks = stat.getBlockCount();return totalBlocks * blockSize;} else {return -1;}}/*** 获取系统存储路径* * @return*/public static String getRootDirectoryPath() {return Environment.getRootDirectory().getAbsolutePath();}}
6、ScreenUtils
package com.example.androidutils;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<?> 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.example.androidutils;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、KeyBoardUtils
package com.example.androidutils;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、NetUtils
package com.example.androidutils;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() {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、HttpUtils
package com.example.androidutils; 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; }
}
这篇关于Log,Toast,SPUtil,Density,SDCard,ScreenUtil,AppVersion,KeyBoard,NetWork,HttpUtil工具类的文章就介绍到这儿,希望我们推荐的文章对编程师们有所帮助!