工具类笔记

正则ip地址:

Pattern IP_ADDRESS = Pattern.compile(
        "((25[0-5]|2[0-4][0-9]|[0-1][0-9]{2}|[1-9][0-9]|[1-9])\\.(25[0-5]|2[0-4]"
                + "[0-9]|[0-1][0-9]{2}|[1-9][0-9]|[1-9]|0)\\.(25[0-5]|2[0-4][0-9]|[0-1]"
                + "[0-9]{2}|[1-9][0-9]|[1-9]|0)\\.(25[0-5]|2[0-4][0-9]|[0-1][0-9]{2}"
                + "|[1-9][0-9]|[0-9]))");

String GOOD_IRI_CHAR = "a-zA-Z0-9\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF";

WEB_URL = Pattern.compile(
        "((?:(http|https|Http|Https):\\/\\/(?:(?:[a-zA-Z0-9\\$\\-\\_\\.\\+\\!\\*\\'\\(\\)"
                + "\\,\\;\\?\\&\\=]|(?:\\%[a-fA-F0-9]{2})){1,64}(?:\\:(?:[a-zA-Z0-9\\$\\-\\_"
                + "\\.\\+\\!\\*\\'\\(\\)\\,\\;\\?\\&\\=]|(?:\\%[a-fA-F0-9]{2})){1,25})?\\@)?)?"
                + "(?:" + DOMAIN_NAME + ")"
                + "(?:\\:\\d{1,5})?)" // plus option port number
                + "(\\/(?:(?:[" + GOOD_IRI_CHAR + "\\;\\/\\?\\:\\@\\&\\=\\#\\~"  // plus option query params
                + "\\-\\.\\+\\!\\*\\'\\(\\)\\,\\_])|(?:\\%[a-fA-F0-9]{2}))*)?"
                + "(?:\\b|$)");
//判断是否安装了google地图

public static boolean isGoogleMapsInstalled(final Context mContext) {
        try {
                mContext.getPackageManager().getApplicationInfo("com.google.android.apps.maps", 0);
                return true;
        } catch (PackageManager.NameNotFoundException e) {
                if (mContext == null) {
                        return false;
                }
                AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
                builder.setMessage("Install Google Maps?");
                builder.setCancelable(true);
                builder.setPositiveButton(LocaleController.getString("OK", R.string.OK), new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialogInterface, int i) {
                                try {
                                        Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=com.google.android.apps.maps"));
                                        mContext.startActivityForResult(intent, 500);
                                } catch (Exception e) {
                                }
                        }
                });
                builder.setNegativeButton(LocaleController.getString("Cancel", R.string.Cancel), null);
                mContext.showDialog(builder.create());
                return false;
        }
}
//显示键盘

public static void showKeyboard(View view) {
    if (view == null) {
        return;
    }
    try {
        InputMethodManager inputManager = (InputMethodManager)view.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
        inputManager.showSoftInput(view, InputMethodManager.SHOW_IMPLICIT);
    } catch (Exception e) {
        FileLog.e("tmessages", e);
    }
}

/**
 * 隐藏键盘
 * @param view
     */
public static void hideKeyboard(View view) {
    if (view == null) {
        return;
    }
    try {
        InputMethodManager imm = (InputMethodManager) view.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
        if (!imm.isActive()) {
            return;
        }
        imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
    } catch (Exception e) {
        FileLog.e("tmessages", e);
    }
}

/**
 * 获取文件
 * @return
     */
public static File getCacheDir() {
    String state = null;
    try {
        state = Environment.getExternalStorageState();
    } catch (Exception e) {
        FileLog.e("tmessages", e);
    }
    if (state == null || state.startsWith(Environment.MEDIA_MOUNTED)) {
        try {
            File file = ApplicationLoader.applicationContext.getExternalCacheDir();
            if (file != null) {
                return file;
            }
        } catch (Exception e) {
            FileLog.e("tmessages", e);
        }
    }
    try {
        File file = ApplicationLoader.applicationContext.getCacheDir();
        if (file != null) {
            return file;
        }
    } catch (Exception e) {
        FileLog.e("tmessages", e);
    }
    return new File("");
}

/**
 * 向上取整
 * @param value
     * @return
     */
public static int dp(float value) {
    if (value == 0) {
        return 0;
    }
    /*进一法*/
    return (int) Math.ceil(density * value);
}

/**
 *

显示光标

 * @param editText
     */
public static void clearCursorDrawable(EditText editText) {
    if (editText == null) {
        return;
    }
    try {
        Field mCursorDrawableRes = TextView.class.getDeclaredField("mCursorDrawableRes");
        mCursorDrawableRes.setAccessible(true);
        mCursorDrawableRes.setInt(editText, 0);
    } catch (Exception e) {
        FileLog.e("tmessages", e);
    }
}

/**
 * 添加桌面快捷方式
*/
private void addShortCurt2DeskTop() {
        Intent shortcut = new Intent("com.android.launcher.action.INSTALL_SHORTCUT");
        //快捷方式的名称
    shortcut.putExtra(Intent.EXTRA_SHORTCUT_NAME, "TonyAutoShortCut");
    shortcut.putExtra("duplicate", false); //不允许重复创建
    shortcut.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE,Intent.ShortcutIconResource.fromContext(LancherDemoActivity.this, R.drawable.beauty));
    shortcut.putExtra(Intent.EXTRA_SHORTCUT_INTENT, new Intent(LancherDemoActivity.this,LancherDemoActivity.class).setAction(<span style="color:#FF0000;">"com.android.action.test"</span>));

//发送广播
sendBroadcast(shortcut);
    }
});

/**
* 删除桌面快捷方式
*/
button2.setOnClickListener(new OnClickListener() {
   public void onClick(View v) {
    deleteShortCurt2DeskTop();
   }

   private void deleteShortCurt2DeskTop() {
   Intent shortcut = new   Intent("com.android.launcher.action.UNINSTALL_SHORTCUT");

        //快捷方式的名称
    shortcut.putExtra(Intent.EXTRA_SHORTCUT_NAME, "TonyAutoShortCut");

    shortcut.putExtra(Intent.EXTRA_SHORTCUT_INTENT, new Intent(LancherDemoActivity.this,LancherDemoActivity.class).setAction(<span style="color:#FF0000;">"com.android.action.test"</span>));
                sendBroadcast(shortcut);
            }
        });


    }
}

Build.VERSION.SDK_INT---sdk版本