Android 常用工具总结

 activity开启关闭工具类

package com.example.lenovo.expresslove.Util;

import android.app.Activity;
import android.content.Intent;


/*
    activty开启关闭工具类

 */


public class ActivityUtils {
    /*
      * 开启新的activity 并且关闭掉自己
     */
    public static void startActivityAndFinish(Activity context, Class cls){
        Intent intent = new Intent(context,cls);
        context.startActivity(intent);
        context.finish();
    }


    /**
     * 开启新的activity
     */
    public static void startActivity(Activity context, Class cls){
        Intent intent = new Intent(context,cls);
        context.startActivity(intent);
    }


}

 跟app相关的辅助类

package com.example.lenovo.expresslove.Util;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;

/**
 * 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 (PackageManager.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 (PackageManager.NameNotFoundException e)
        {
            e.printStackTrace();
        }
        return null;
    }


}

 单位转换类

package com.example.lenovo.expresslove.Util;

import android.content.Context;
import android.util.TypedValue;

/*
    单位转换类 DensityUtils
 */
public class DensityUtils {
    private DensityUtils()
    {
        /** cannot be instantiated **/
        throw new UnsupportedOperationException("cannot be instantiated");
    }

    /**
     * dp转px
     *
     * @param context
     * @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
     * @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 pxVal
     * @return
     */
    public static float px2sp(Context context, float pxVal)
    {
        return (pxVal / context.getResources().getDisplayMetrics().scaledDensity);
    }


}

 

 打开关闭软键盘

package com.example.lenovo.expresslove.Util;

import android.content.Context;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;

/**
 * 打开或关闭软键盘
 *
 * @author wdx
 *
 */
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);
    }


}

 

log统一管理类

package com.example.lenovo.expresslove.Util;

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 = "test";
    // 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);
    }



}

跟网络相关的工具类

package com.example.lenovo.expresslove.Util;

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;

    }



    /** 检查是否是移动网络 */
    public static boolean isMobile(Context context) {
        NetworkInfo info = getNetworkInfo(context);
        if (info != null) {
            if (info.getType() == ConnectivityManager.TYPE_MOBILE)
                return true;
        }
        return false;
    }


    private static NetworkInfo getNetworkInfo(Context context) {

        ConnectivityManager cm = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        return cm.getActiveNetworkInfo();
    }


    /**
     * 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);
    }

}

屏幕相关的辅助类

package com.example.lenovo.expresslove.Util;

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;

    }

}

 sd卡相关辅助类

package com.example.lenovo.expresslove.Util;

import android.os.Environment;
import android.os.StatFs;

import java.io.File;

/**
 * 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();
    }
}

 Sp封装类

package com.example.lenovo.expresslove.Util;

import android.content.Context;
import android.content.SharedPreferences;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Map;

/*
    SharedPreferences封装类SPUtils

 */
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();
        }
    }

}

 土司管理类

package com.example.lenovo.expresslove.Util;

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();
    }
}

 震动工具类

package com.example.lenovo.expresslove.Util;

import android.app.Service;
import android.content.Context;
import android.os.Vibrator;

/*
    Android震动工具类
 */
public class VibratorUtil {

    /**
     * long milliseconds ：震动的时长，单位是毫秒
     * long[] pattern  ：自定义震动模式 。数组中数字的含义依次是[静止时长，震动时长，静止时长，震动时长。。。]时长的单位是毫秒
     * boolean isRepeat ： 是否反复震动，如果是true，反复震动，如果是false，只震动一次
     */
    public static void Vibrate(final Context context) {
        long milliseconds = 100;
        Vibrator vib = (Vibrator) context.getSystemService(Service.VIBRATOR_SERVICE);
        vib.vibrate(milliseconds);
    }
    public static void Vibrate(final Context context, long milliseconds) {
        Vibrator vib = (Vibrator) context.getSystemService(Service.VIBRATOR_SERVICE);
        vib.vibrate(milliseconds);
    }
    public static void Vibrate(final Context context, long[] pattern,boolean isRepeat) {
        Vibrator vib = (Vibrator) context.getSystemService(Service.VIBRATOR_SERVICE);
        vib.vibrate(pattern, isRepeat ? 1 : -1);//-1为反复震动
    }



}

以上是一些常用工具辅助类，希望对你有所帮助哦！告辞！！！