摘要

本文總結了過往專案和一些資料上的Android 工具類的封裝，既當做是總結，也作收集收藏用。感謝網路上諸方資料。

SharedPreferences工具類：SPUtil.java

public class SPUtil {
    public static final String FILE_DEFAULT = "default";

    public static int getInt(String key) {
        SharedPreferences sharedPreferences = getSharePreferences(FILE_DEFAULT);
        return sharedPreferences.getInt(key, 0);
    }

    public static boolean getBoolean(String key) {
        SharedPreferences sharedPreferences = getSharePreferences(FILE_DEFAULT);
        return sharedPreferences.getBoolean(key, false);
    }

    public static float getFloat(String key) {
        SharedPreferences sharedPreferences = getSharePreferences(FILE_DEFAULT);
        return sharedPreferences.getFloat(key, 0);
    }

    public static boolean getBoolean(String key, boolean defValue) {
        SharedPreferences sharedPreferences = getSharePreferences(FILE_DEFAULT);
        return sharedPreferences.getBoolean(key, defValue);
    }

    public static String getString(String key) {
        SharedPreferences sharedPreferences = getSharePreferences(FILE_DEFAULT);
        return sharedPreferences.getString(key,FILE_DEFAULT);
    }

    public static String getStringWithDefault(String key, String defStr) {
        SharedPreferences sharedPreferences = getSharePreferences(FILE_DEFAULT);
        return sharedPreferences.getString(key, defStr);
    }

    public static void putInt(String key, int value) {
        SharedPreferences.Editor editor = getEditor(getSharePreferences(FILE_DEFAULT));
        editor.putInt(key, value);
        editor.commit();
    }

    public static void putBoolean(String key, boolean value) {
        SharedPreferences.Editor editor = getEditor(getSharePreferences(FILE_DEFAULT));
        editor.putBoolean(key, value);
        editor.commit();
    }

    public static void putString(String key, String value) {
        SharedPreferences.Editor editor = getEditor(getSharePreferences(FILE_DEFAULT));
        editor.putString(key, value);
        editor.commit();
    }

    public static void putFloat(String key, float value) {
        SharedPreferences.Editor editor = getEditor(getSharePreferences(FILE_DEFAULT));

        editor.putFloat(key, value);
        editor.commit();
    }

    public static void putLong(String key, long value) {
        SharedPreferences.Editor editor = getEditor(getSharePreferences(FILE_DEFAULT));

        editor.putLong(key, value);
        editor.commit();
    }


    public static long getLong(String key) {
        SharedPreferences sharedPreferences = getSharePreferences(FILE_DEFAULT);
        return sharedPreferences.getLong(key, 0);
    }

    public static int getInt(String key, int defValue) {
        SharedPreferences sharedPreferences = getSharePreferences(FILE_DEFAULT);
        return sharedPreferences.getInt(key, defValue);
    }

    public static int getInt(String key, String fileName) {

        SharedPreferences sharedPreferences = getSharePreferences(getFileName(fileName));
        return sharedPreferences.getInt(key, 0);
    }

    public static boolean getBoolean(String key, String fileName) {
        SharedPreferences sharedPreferences = getSharePreferences(getFileName(fileName));
        return sharedPreferences.getBoolean(key, false);
    }

    public static String getString(String key, String fileName) {
        SharedPreferences sharedPreferences = getSharePreferences(getFileName(fileName));
        return sharedPreferences.getString(key, null);
    }

    public static float getFloat(String key, String fileName) {
        SharedPreferences sharedPreferences = getSharePreferences(getFileName(fileName));
        return sharedPreferences.getFloat(key, 0);
    }

    public static long getLong(String key, String fileName) {
        SharedPreferences sharedPreferences = getSharePreferences(getFileName(fileName));
        return sharedPreferences.getLong(key, 0);
    }

    public static void putInt(String key, int value, String fileName) {
        SharedPreferences.Editor editor = getEditor(getSharePreferences(getFileName(fileName)));
        editor.putInt(key, value);
        editor.commit();

    }

    public static void putBoolean(String key, boolean value, String fileName) {
        SharedPreferences.Editor editor = getEditor(getSharePreferences(getFileName(fileName)));

        editor.putBoolean(key, value);
        editor.commit();
    }

    public static void putString(String key, String value, String fileName) {
        SharedPreferences.Editor editor = getEditor(getSharePreferences(getFileName(fileName)));

        editor.putString(key, value);
        editor.commit();
    }

    public static void putFloat(String key, float value, String fileName) {
        SharedPreferences.Editor editor = getEditor(getSharePreferences(getFileName(fileName)));

        editor.putFloat(key, value);
        editor.commit();
    }

    public static void putLong(String key, long value, String fileName) {
        SharedPreferences.Editor editor = getEditor(getSharePreferences(getFileName(fileName)));

        editor.putLong(key, value);
        editor.commit();
    }

    private static SharedPreferences getSharePreferences(String fileName) {
        return TApplication.getContext().getSharedPreferences(fileName, Context.MODE_PRIVATE);

    }

    private static SharedPreferences.Editor getEditor(SharedPreferences sharedPreferences) {
        return sharedPreferences.edit();
    }

    public static String getFileName(String fileName) {
        if (!TextUtils.isEmpty(fileName)) {
            return fileName;
        } else {
            return FILE_DEFAULT;
        }
    }
}
 

ToastUtil.java

    public class ToastUtils {


    private static Toast mToast ;
    private static Handler mHandler = new Handler();
    private static Runnable r = new Runnable() {
        @Override
        public void run() {
            mToast.cancel();
        }
    } ;

    /**
     * 自定義toast，重複點選時，會直接替換文字，不會重新建立新的Toast並加入佇列中一條條顯示
     * @param
 
 context
     * @param text
     * @param duration
     */
    public static void showToast(Context context,String text,int duration) {
        mHandler.removeCallbacks(r);
        if (mToast != null) {
            mToast.setText(text);
        } else {
            mToast = Toast.makeText(context,text,Toast.LENGTH_SHORT);
        }
        mHandler.postDelayed(r,duration) ;
        mToast.show();
    }

    /**
     * 防重複點選的toast，即便是帕金森患者也不會導致toast一直顯示著
     * @param
 
 text
     */
    public static void showToast(String text) {
        showToast(TApplication.getContext(),text,1000);
    }

    public static void showToast(Context context,int resId,int duration) {
        showToast(context,context.getResources().getString(resId),duration);
    }


    public static void show(CharSequence text) {
        Toast.makeText(TApplication.getContext(), text, Toast.LENGTH_SHORT).show();
    }

    /**
     * 顯示土司的工具類,安全的工具類可以在任意執行緒裡面顯示
     * @param activity
     * @param text
     */
    public static void show(final Activity activity, final CharSequence text) {
        if ("main".equalsIgnoreCase(Thread.currentThread().getName())) {
            if (activity == null){
                return;
            }
            Toast.makeText(activity, text, Toast.LENGTH_SHORT).show();
        } else {
            activity.runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    Toast.makeText(activity, text, Toast.LENGTH_SHORT).show();
                }
            });
        }
    }
    /**
     * 顯示土司的工具類,安全的工具類可以在任意執行緒裡面顯示
     * @param activity
     * @param text
     * @param length 顯示的時常
     */
    public static void show(final Activity activity, final CharSequence text, final int length) {
        if ("main".equalsIgnoreCase(Thread.currentThread().getName())) {
            Toast.makeText(activity, text, length).show();
        } else {
            activity.runOnUiThread(new Runnable() {
                @Override
                public void run() {
                    Toast.makeText(activity, text, length).show();
                }
            });
        }
    }
}

DensityUtils.java

public class DensityUtils  {  

    private DensityUtils()  
    {  
        /* cannot be instantiated */  
        throw new UnsupportedOperationException("cannot be instantiated");  
    }  

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

}

SDCardUtils.java

public class SDCardUtils  {  

    private SDCardUtils()  
    {  
        /* cannot be instantiated */  
        throw new UnsupportedOperationException("cannot be instantiated");  
    }  

    /** 
     * 判斷SDCard是否可用 
     *  
     * @return 
     */  
    public static boolean isSDCardEnable()  
    {  
        return Environment.getExternalStorageState().equals(  
                Environment.MEDIA_MOUNTED);  

    }  

    /** 
     * 獲取SD卡路徑 
     *  
     * @return 
     */  
    public static String getSDCardPath()  
    {  
        return Environment.getExternalStorageDirectory().getAbsolutePath()  
                + File.separator;  
    }  

    /** 
     * 獲取SD卡的剩餘容量 單位byte 
     *  
     * @return 
     */  
    public static long getSDCardAllSize()  
    {  
        if (isSDCardEnable())  
        {  
            StatFs stat = new StatFs(getSDCardPath());  
            // 獲取空閒的資料塊的數量  
            long availableBlocks = (long) stat.getAvailableBlocks() - 4;  
            // 獲取單個數據塊的大小（byte）  
            long freeBlocks = stat.getAvailableBlocks();  
            return freeBlocks * availableBlocks;  
        }  
        return 0;  
    }  

    /** 
     * 獲取指定路徑所在空間的剩餘可用容量位元組數，單位byte 
     *  
     * @param filePath 
     * @return 容量位元組 SDCard可用空間，內部儲存可用空間 
     */  
    public static long getFreeBytes(String filePath)  
    {  
        // 如果是sd卡的下的路徑，則獲取sd卡可用容量  
        if (filePath.startsWith(getSDCardPath()))  
        {  
            filePath = getSDCardPath();  
        } else  
        {// 如果是內部儲存的路徑，則獲取記憶體儲存的可用容量  
            filePath = Environment.getDataDirectory().getAbsolutePath();  
        }  
        StatFs stat = new StatFs(filePath);  
        long availableBlocks = (long) stat.getAvailableBlocks() - 4;  
        return stat.getBlockSize() * availableBlocks;  
    }  

    /** 
     * 獲取系統儲存路徑 
     *  
     * @return 
     */  
    public static String getRootDirectoryPath()  
    {  
        return Environment.getRootDirectory().getAbsolutePath();  
    }  

}

螢幕輔助類ScreenUtils.java

public class ScreenUtils  {  

    private ScreenUtils()  
    {  
        /* cannot be instantiated */  
        throw new UnsupportedOperationException("cannot be instantiated");  
    }  

    /** 
     * 獲得螢幕高度 
     *  
     * @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;  
    }  

    /** 
     * 獲得螢幕寬度 
     *  
     * @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;  
    }  

    /** 
     * 獲得狀態列的高度 
     *  
     * @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;  
    }  

    /** 
     * 獲取當前螢幕截圖，包含狀態列 
     *  
     * @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;  

    }  

    /** 
     * 獲取當前螢幕截圖，不包含狀態列 
     *  
     * @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;  

    }  

}

AppUtils

public class AppUtils  {  

    private AppUtils()  
    {  
        /* cannot be instantiated */  
        throw new UnsupportedOperationException("cannot be instantiated");  
    }  

    /** 
     * 獲取應用程式名稱 
     */  
    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;  
    }  

    /** 
     * [獲取應用程式版本名稱資訊] 
     *  
     * @param context 
     * @return 當前應用的版本名稱 
     */  
    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;  
    }  

}

NetUtils.java

public class NetUtils {  

    public static final int NO_NETWORK = 0;
    public static final int NETWORK_WIFI = 1;
    public static final int NETWORK_MOBILE = 2;

    private NetUtils()  
    {  
        /* cannot be instantiated */  
        throw new UnsupportedOperationException("cannot be instantiated");  
    }  

    /** 
     * 判斷網路是否連線 
     */  
    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;  
    }  

    /** 
     * 判斷是否是wifi連線 
     */  
    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;  

    }  

    /** 
     * 開啟網路設定介面 
     */  
    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);  
    }  

    /**
     * 檢查網路連線
     *
     * @param context
     * @return 0為無網路狀態，1為wifi連線狀態，2為行動網路連線狀態
     */
    public static int checkNetwork(Context context) {
        if (context == null) {
            return NETWORK_WIFI;

        }
        ConnectivityManager cm = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo wifi = cm.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
        if (wifi != null && wifi.isConnected()) {
            return NETWORK_WIFI;
        }
        NetworkInfo mobile = cm.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
        if (mobile != null && mobile.isConnected()) {
            return NETWORK_MOBILE;
        }
        return NO_NETWORK;
    }

}

其他

ToolUtils.java

/**
 * 判斷輸入文字是否含有emoji
 * @param string
 * @return
 */
public static boolean isEmoji(String string) {
    Pattern p = Pattern.compile("[\ud83c\udc00-\ud83c\udfff]|[\ud83d\udc00-\ud83d\udfff]|[\u2600-\u27ff]",
            Pattern.UNICODE_CASE | Pattern.CASE_INSENSITIVE);
    Matcher m = p.matcher(string);
    return m.find();
}

/*public static boolean isEmoji1(String string) {
    Pattern p = Pattern.compile("/[\u1F60-\u1F64]|[\u2702-\u27B0]|[\u1F68-\u1F6C]|[\u1F30-\u1F70]|[\u2600-\u26ff]/g");
    Matcher m = p.matcher(string);
    return m.matches();
}*/

/**
 * 判斷是不是emoji字元
 * @param codePoint
 * @return
 */
private static boolean isEmojiCharacter(char codePoint) {
    return (codePoint == 0x0) ||
            (codePoint == 0x9) ||
            (codePoint == 0xA) ||
            (codePoint == 0xD) ||
            ((codePoint >= 0x20) && (codePoint <= 0xD7FF)) ||
            ((codePoint >= 0xE000) && (codePoint <= 0xFFFD)) ||
            ((codePoint >= 0x10000) && (codePoint <= 0x10FFFF));
}

/**
 * 過濾emoji 或者 其他非文字型別的字元
 * @param source
 * @return
 */
public static String filterEmoji(String source) {

    if (!isEmoji(source)) {
        return source;//如果不包含，直接返回
    }
    //到這裡鐵定包含
    StringBuilder buf = null;

    int len = source.length();

    for (int i = 0; i < len; i++) {
        char codePoint = source.charAt(i);

        if (isEmojiCharacter(codePoint)) {
            if (buf == null) {
                buf = new StringBuilder(source.length());
            }

            buf.append(codePoint);
        } else {
        }
    }
    if (buf == null) {
        return source;//如果沒有找到 emoji表情，則返回源字串
    } else {
        if (buf.length() == len) {//這裡的意義在於儘可能少的toString，因為會重新生成字串
            buf = null;
            return source;
        } else {
            return buf.toString();
        }
    }

}
 /**
 * 顯示一個進度條
 * @param activity
 * @param customIndeterminateDrawable 自定義進度條載入圖片
 * @return
 */
public static ProgressBar createProgressBar(Activity activity, Drawable customIndeterminateDrawable) {
    // activity根部的ViewGroup，其實是一個FrameLayout
    FrameLayout rootContainer = (FrameLayout) activity.findViewById(android.R.id.content);
    // 給progressbar準備一個FrameLayout的LayoutParams
    FrameLayout.LayoutParams lp = new FrameLayout.LayoutParams(
            ViewGroup.LayoutParams.WRAP_CONTENT,
            ViewGroup.LayoutParams.WRAP_CONTENT);
    // 設定對其方式為：螢幕居中對其
    lp.gravity = Gravity.CENTER_VERTICAL | Gravity.CENTER_HORIZONTAL;

    ProgressBar progressBar = new ProgressBar(activity);
    progressBar.setVisibility(View.GONE);
    progressBar.setLayoutParams(lp);
    // 自定義小菊花
    if (customIndeterminateDrawable != null) {
        progressBar.setIndeterminateDrawable(customIndeterminateDrawable);
    }
    // 將菊花新增到FrameLayout中
    rootContainer.addView(progressBar);
    return progressBar;
}

許可權相關 PermissionUtils.java

public static boolean checkPermission(String[] permissions,Activity activity,int requestCode){
    List<String> needRequestPermissionList = ToolUtil.findDeniedPermissions(permissions,activity);
    if (needRequestPermissionList != null && needRequestPermissionList.size() > 0){
        ActivityCompat.requestPermissions(activity,needRequestPermissionList.toArray
                (new String[needRequestPermissionList.size()]), PERMISSION_REQUESTCODE);
        return true;
    }
    else return false;
}

public static boolean checkPermission(String[] permissions,Activity activity){
    List<String> needRequestPermissionList = ToolUtil.findDeniedPermissions(permissions,activity);
    if (needRequestPermissionList != null && needRequestPermissionList.size() > 0){
        ActivityCompat.requestPermissions(activity,needRequestPermissionList.toArray
                (new String[needRequestPermissionList.size()]), PERMISSION_REQUESTCODE);
        return true;
    }
    else return false;
}

/**
 *獲取許可權集中需要申請許可權的列表
 * @param permissions
 * @param activity
 * @return
 */
public static List<String> findDeniedPermissions(String[] permissions,Activity activity) {
    List<String> needRequestPermissionList = new ArrayList<>();
    for (String perm : permissions){
        if (ContextCompat.checkSelfPermission(TApplication.getContext(),perm) != PackageManager.PERMISSION_GRANTED){
            needRequestPermissionList.add(perm);
        }else{
            if (ActivityCompat.shouldShowRequestPermissionRationale(activity,perm)){
                  needRequestPermissionList.add(perm);
            }
        }
    }
    return needRequestPermissionList;
}

/**
 * 檢測是否說有的許可權都有了
 * @param grantResults
 * @return
 */
public static boolean verifyPermission(int[] grantResults){
     for (int result : grantResults){
         if (result != PackageManager.PERMISSION_GRANTED){
             return false;
         }
     }
    return true;
}


public static void showMissingPermissionDialog(final Activity activity) {
    android.support.v7.app.AlertDialog.Builder builder = new android.support.v7.app.AlertDialog.Builder(activity);
    builder.setTitle(R.string.notifyMsg);

    builder.setNegativeButton(R.string.cancel, new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            activity.finish();
        }
    });

    builder.setPositiveButton(R.string.setting, new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            startAppSetting(activity);
        }
    });
    builder.setCancelable(false);
    builder.show();
}

public static void startAppSetting(Activity activity) {
    Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
    intent.setData(Uri.parse("package:"+activity.getPackageName()));
    activity.startActivity(intent);
}