Utils.java

/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.lan.nicehair.utils;

import java.io.File;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import android.annotation.SuppressLint;
import android.app.ActivityManager;
import android.content.Context;
import android.graphics.Bitmap;
import android.os.Build;
import android.os.Environment;
import android.os.StatFs;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.TextUtils;
import android.text.style.ForegroundColorSpan;
import android.widget.TextView;

/**
 * Class containing some static utility methods.
 */
public class Utils {
    public static final int IO_BUFFER_SIZE = 8 * 1024;

    private Utils() {};

    /**
     * Workaround for bug pre-Froyo, see here for more info:
     * http://android-developers.blogspot.com/2011/09/androids-http-clients.html
     */
    public static void disableConnectionReuseIfNecessary() {
        // HTTP connection reuse which was buggy pre-froyo
        if (hasHttpConnectionBug()) {
            System.setProperty("http.keepAlive", "false");
        }
    }

    /**
     * Get the size in bytes of a bitmap.
     * @param bitmap
     * @return size in bytes
     */
    @SuppressLint("NewApi")
    public static int getBitmapSize(Bitmap bitmap) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR1) {
            return bitmap.getByteCount();
        }
        // Pre HC-MR1
        return bitmap.getRowBytes() * bitmap.getHeight();
    }

    /**
     * Check if external storage is built-in or removable.
     *
     * @return True if external storage is removable (like an SD card), false
     *         otherwise.
     */
    @SuppressLint("NewApi")
    public static boolean isExternalStorageRemovable() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD) {
            return Environment.isExternalStorageRemovable();
        }
        return true;
    }

    /**
     * Get the external app cache directory.
     *
     * @param context The context to use
     * @return The external cache dir
     */
    @SuppressLint("NewApi")
    public static File getExternalCacheDir(Context context) {
        if (hasExternalCacheDir()) {
            return context.getExternalCacheDir();
        }

        // Before Froyo we need to construct the external cache dir ourselves
        final String cacheDir = "/Android/data/" + context.getPackageName() + "/cache/";
        return new File(Environment.getExternalStorageDirectory().getPath() + cacheDir);
    }

    /**
     * Check how much usable space is available at a given path.
     *
     * @param path The path to check
     * @return The space available in bytes
     */
    @SuppressLint("NewApi")
    public static long getUsableSpace(File path) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD) {
            return path.getUsableSpace();
        }
        final StatFs stats = new StatFs(path.getPath());
        return (long) stats.getBlockSize() * (long) stats.getAvailableBlocks();
    }

    /**
     * Get the memory class of this device (approx. per-app memory limit)
     *
     * @param context
     * @return
     */
    public static int getMemoryClass(Context context) {
        return ((ActivityManager) context.getSystemService(
                Context.ACTIVITY_SERVICE)).getMemoryClass();
    }

    /**
     * Check if OS version has a http URLConnection bug. See here for more information:
     * http://android-developers.blogspot.com/2011/09/androids-http-clients.html
     *
     * @return
     */
    public static boolean hasHttpConnectionBug() {
        return Build.VERSION.SDK_INT < Build.VERSION_CODES.FROYO;
    }

    /**
     * Check if OS version has built-in external cache dir method.
     *
     * @return
     */
    public static boolean hasExternalCacheDir() {
        return Build.VERSION.SDK_INT >= Build.VERSION_CODES.FROYO;
    }

    /**
     * Check if ActionBar is available.
     *
     * @return
     */
    public static boolean hasActionBar() {
        return Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB;
    }
    /**
	 * 
	   
	* @Title: addLinks 
	   
	* @Description: TODO(在文本框中识别http地址、表情) 
	   
	* @param @param name 用户回复列表对用户名变颜色，不存在name时传入""即可
	* @param @param view    文本控件 
	   
	* @return void    返回类型 
	   
	* @throws
	 */
	public static  void addLinks(int color,String name,TextView view) {
	        MyLinkify.TransformFilter mentionFilter = new MyLinkify.TransformFilter() {
	            public final String transformUrl(final Matcher match, String url) {
	                return match.group(1);
	            }
	        };
	        // 匹配“回复”用户和捕获的用户名部分文字
//	        Pattern pattern = Pattern.compile("回复([a-zA-Z0-9_\\-\\u4e00-\\u9fa5]+)");
//	        String scheme = "com.lan.nicehair://";
//	        MyLinkify.addLinks(view, pattern, scheme, null, mentionFilter);
//	        pattern = Pattern.compile("#([a-zA-Z0-9_\\-\\u4e00-\\u9fa5]+)#");
//	        scheme = "com.lan.nicehair:topic://";
//	        MyLinkify.addLinks(view, pattern, scheme, null, mentionFilter);
//
//	        MyLinkify.addLinks(view, MyLinkify.WEB_URLS);
	        CharSequence content = view.getText();
			SpannableString value = SpannableString.valueOf(content);
			if(!TextUtils.isEmpty(name)){
				int end=name.length();
				value.setSpan(new ForegroundColorSpan(color), 0, end,
						Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
			}
	        view.setText(value);
	 }
}