757 lines
21 KiB
Plaintext
757 lines
21 KiB
Plaintext
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package com.stone.util;
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import java.io.ByteArrayOutputStream;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.RandomAccessFile;
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import java.io.UnsupportedEncodingException;
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import java.net.HttpURLConnection;
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import java.net.MalformedURLException;
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import java.net.URL;
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import java.net.URLConnection;
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import java.util.List;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import android.app.Activity;
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import android.app.AlertDialog;
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import android.app.Dialog;
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import android.app.ProgressDialog;
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import android.content.ContentUris;
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import android.content.Context;
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import android.content.DialogInterface;
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import android.database.Cursor;
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import android.graphics.Bitmap;
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import android.graphics.BitmapFactory;
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import android.graphics.Bitmap.CompressFormat;
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import android.net.ConnectivityManager;
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import android.net.NetworkInfo;
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import android.net.Uri;
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import android.os.Build;
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import android.os.Environment;
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import android.provider.MediaStore;
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import android.text.TextUtils;
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import android.util.Log;
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import android.widget.Toast;
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import junit.framework.Assert;
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/**
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* 工具类
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*
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* @date 2014-5-9
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* @author Stone
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*/
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public class Util {
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/**
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* 判断电话号码是否有效
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*
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* @param phoneNumber
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* @return true 有效 / false 无效
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*/
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public static boolean isPhoneNumberValid(String phoneNumber) {
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boolean isValid = false;
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String expression = "((^(13|15|18)[0-9]{9}$)|(^0[1,2]{1}\\d{1}-?\\d{8}$)|(^0[3-9] {1}\\d{2}-?\\d{7,8}$)|(^0[1,2]{1}\\d{1}-?\\d{8}-(\\d{1,4})$)|(^0[3-9]{1}\\d{2}-? \\d{7,8}-(\\d{1,4})$))";
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CharSequence inputStr = phoneNumber;
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Pattern pattern = Pattern.compile(expression);
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Matcher matcher = pattern.matcher(inputStr);
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if (matcher.matches()) {
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isValid = true;
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}
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return isValid;
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}
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// 判断网络是否连接
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public static boolean isNetworkConnected(Context context) {
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if (context != null) {
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ConnectivityManager mConnectivityManager = (ConnectivityManager) context
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.getSystemService(Context.CONNECTIVITY_SERVICE);
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NetworkInfo mNetworkInfo = mConnectivityManager
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.getActiveNetworkInfo();
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if (mNetworkInfo != null) {
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return mNetworkInfo.isAvailable();
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}
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}
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return false;
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}
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private static final String TAG = "SDK_Sample.Util";
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private static Dialog mProgressDialog;
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private static Toast mToast;
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/* Convert byte[] to hex string.这里我们可以将byte转换成int，然后利用Integer.toHexString(int)来转换成16进制字符串。
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* @param src byte[] data
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* @return hex string
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*/
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public static String bytesToHexString(byte[] src){
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StringBuilder stringBuilder = new StringBuilder("");
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if (src == null || src.length <= 0) {
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return null;
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}
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for (int i = 0; i < src.length; i++) {
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int v = src[i] & 0xFF;
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String hv = Integer.toHexString(v);
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if (hv.length() < 2) {
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stringBuilder.append(0);
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}
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stringBuilder.append(hv);
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}
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return stringBuilder.toString();
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}
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/**
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* Convert hex string to byte[]
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* @param hexString the hex string
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* @return byte[]
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*/
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public static byte[] hexStringToBytes(String hexString) {
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if (hexString == null || hexString.equals("")) {
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return null;
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}
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hexString = hexString.toUpperCase();
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int length = hexString.length() / 2;
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char[] hexChars = hexString.toCharArray();
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byte[] d = new byte[length];
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for (int i = 0; i < length; i++) {
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int pos = i * 2;
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d[i] = (byte) (charToByte(hexChars[pos]) << 4 | charToByte(hexChars[pos + 1]));
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}
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return d;
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}
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/**
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* Convert char to byte
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* @param c char
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* @return byte
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*/
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private static byte charToByte(char c) {
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return (byte) "0123456789ABCDEF".indexOf(c);
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}
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/*
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* 16进制数字字符集
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*/
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private static String hexString="0123456789ABCDEF";
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/*
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* 将字符串编码成16进制数字,适用于所有字符（包括中文）
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*/
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public static String toHexString(String str)
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{
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//根据默认编码获取字节数组
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byte[] bytes = null;
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try {
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bytes = str.getBytes("UTF-8");
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} catch (UnsupportedEncodingException e) {
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e.printStackTrace();
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}
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if (bytes == null) return null;
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StringBuilder sb=new StringBuilder(bytes.length*2);
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//将字节数组中每个字节拆解成2位16进制整数
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for(int i=0;i<bytes.length;i++)
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{
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sb.append(hexString.charAt((bytes[i]&0xf0)>>4));
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sb.append(hexString.charAt((bytes[i]&0x0f)>>0));
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}
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return sb.toString();
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}
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//转换十六进制编码为字符串
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public static String hexToString(String s)
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{
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if("0x".equals(s.substring(0, 2)))
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{
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s =s.substring(2);
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}
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byte[] baKeyword = new byte[s.length()/2];
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for(int i = 0; i < baKeyword.length; i++)
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{
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try
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{
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baKeyword[i] = (byte)(0xff & Integer.parseInt(s.substring(i*2, i*2+2),16));
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}
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catch(Exception e)
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{
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e.printStackTrace();
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}
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}
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try
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{
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s = new String(baKeyword, "utf-8");//UTF-16le:Not
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}
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catch (Exception e1)
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{
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e1.printStackTrace();
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}
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return s;
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}
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public static byte[] bmpToByteArray(final Bitmap bmp, final boolean needRecycle) {
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ByteArrayOutputStream output = new ByteArrayOutputStream();
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bmp.compress(CompressFormat.PNG, 100, output);
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if (needRecycle) {
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bmp.recycle();
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}
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byte[] result = output.toByteArray();
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try {
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output.close();
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} catch (Exception e) {
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e.printStackTrace();
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}
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return result;
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}
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public static byte[] getHtmlByteArray(final String url) {
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URL htmlUrl = null;
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InputStream inStream = null;
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try {
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htmlUrl = new URL(url);
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URLConnection connection = htmlUrl.openConnection();
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HttpURLConnection httpConnection = (HttpURLConnection)connection;
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int responseCode = httpConnection.getResponseCode();
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if(responseCode == HttpURLConnection.HTTP_OK){
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inStream = httpConnection.getInputStream();
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}
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} catch (MalformedURLException e) {
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e.printStackTrace();
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} catch (IOException e) {
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e.printStackTrace();
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}
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byte[] data = inputStreamToByte(inStream);
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return data;
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}
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public static byte[] inputStreamToByte(InputStream is) {
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try{
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ByteArrayOutputStream bytestream = new ByteArrayOutputStream();
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int ch;
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while ((ch = is.read()) != -1) {
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bytestream.write(ch);
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}
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byte imgdata[] = bytestream.toByteArray();
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bytestream.close();
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return imgdata;
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}catch(Exception e){
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e.printStackTrace();
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}
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return null;
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}
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public static byte[] readFromFile(String fileName, int offset, int len) {
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if (fileName == null) {
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return null;
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}
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File file = new File(fileName);
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if (!file.exists()) {
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Log.i(TAG, "readFromFile: file not found");
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return null;
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}
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if (len == -1) {
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len = (int) file.length();
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}
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Log.d(TAG, "readFromFile : offset = " + offset + " len = " + len + " offset + len = " + (offset + len));
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if(offset <0){
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Log.e(TAG, "readFromFile invalid offset:" + offset);
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return null;
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}
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if(len <=0 ){
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Log.e(TAG, "readFromFile invalid len:" + len);
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return null;
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}
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if(offset + len > (int) file.length()){
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Log.e(TAG, "readFromFile invalid file len:" + file.length());
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return null;
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}
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byte[] b = null;
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try {
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RandomAccessFile in = new RandomAccessFile(fileName, "r");
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b = new byte[len];
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in.seek(offset);
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in.readFully(b);
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in.close();
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} catch (Exception e) {
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Log.e(TAG, "readFromFile : errMsg = " + e.getMessage());
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e.printStackTrace();
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}
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return b;
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}
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public static int computeSampleSize(BitmapFactory.Options options,
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int minSideLength, int maxNumOfPixels) {
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int initialSize = computeInitialSampleSize(options, minSideLength,
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maxNumOfPixels);
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int roundedSize;
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if (initialSize <= 8) {
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roundedSize = 1;
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while (roundedSize < initialSize) {
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roundedSize <<= 1;
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}
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} else {
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roundedSize = (initialSize + 7) / 8 * 8;
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}
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return roundedSize;
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}
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private static int computeInitialSampleSize(BitmapFactory.Options options,
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int minSideLength, int maxNumOfPixels) {
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double w = options.outWidth;
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double h = options.outHeight;
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int lowerBound = (maxNumOfPixels == -1) ? 1 :
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(int) Math.ceil(Math.sqrt(w * h / maxNumOfPixels));
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int upperBound = (minSideLength == -1) ? 128 :
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(int) Math.min(Math.floor(w / minSideLength),
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Math.floor(h / minSideLength));
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if (upperBound < lowerBound) {
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// return the larger one when there is no overlapping zone.
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return lowerBound;
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}
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if ((maxNumOfPixels == -1) &&
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(minSideLength == -1)) {
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return 1;
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} else if (minSideLength == -1) {
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return lowerBound;
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} else {
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return upperBound;
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}
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}
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/**
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* 以最省内存的方式读取图片
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*/
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public static Bitmap readBitmap(final String path){
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try{
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FileInputStream stream = new FileInputStream(new File(path+"test.jpg"));
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BitmapFactory.Options opts = new BitmapFactory.Options();
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opts.inSampleSize = 8;
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opts.inPurgeable=true;
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opts.inInputShareable=true;
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Bitmap bitmap = BitmapFactory.decodeStream(stream , null, opts);
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return bitmap;
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} catch (OutOfMemoryError e) {
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return null;
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} catch (Exception e) {
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return null;
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}
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}
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|
|
private static final int MAX_DECODE_PICTURE_SIZE = 1920 * 1440;
|
|||
|
|
public static Bitmap extractThumbNail(final String path, final int height, final int width, final boolean crop) {
|
|||
|
|
Assert.assertTrue(path != null && !path.equals("") && height > 0 && width > 0);
|
|||
|
|
|
|||
|
|
BitmapFactory.Options options = new BitmapFactory.Options();
|
|||
|
|
|
|||
|
|
try {
|
|||
|
|
options.inJustDecodeBounds = true;
|
|||
|
|
Bitmap tmp = BitmapFactory.decodeFile(path, options);
|
|||
|
|
if (tmp != null) {
|
|||
|
|
tmp.recycle();
|
|||
|
|
tmp = null;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
Log.d(TAG, "extractThumbNail: round=" + width + "x" + height + ", crop=" + crop);
|
|||
|
|
final double beY = options.outHeight * 1.0 / height;
|
|||
|
|
final double beX = options.outWidth * 1.0 / width;
|
|||
|
|
Log.d(TAG, "extractThumbNail: extract beX = " + beX + ", beY = " + beY);
|
|||
|
|
options.inSampleSize = (int) (crop ? (beY > beX ? beX : beY) : (beY < beX ? beX : beY));
|
|||
|
|
if (options.inSampleSize <= 1) {
|
|||
|
|
options.inSampleSize = 1;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// NOTE: out of memory error
|
|||
|
|
while (options.outHeight * options.outWidth / options.inSampleSize > MAX_DECODE_PICTURE_SIZE) {
|
|||
|
|
options.inSampleSize++;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
int newHeight = height;
|
|||
|
|
int newWidth = width;
|
|||
|
|
if (crop) {
|
|||
|
|
if (beY > beX) {
|
|||
|
|
newHeight = (int) (newWidth * 1.0 * options.outHeight / options.outWidth);
|
|||
|
|
} else {
|
|||
|
|
newWidth = (int) (newHeight * 1.0 * options.outWidth / options.outHeight);
|
|||
|
|
}
|
|||
|
|
} else {
|
|||
|
|
if (beY < beX) {
|
|||
|
|
newHeight = (int) (newWidth * 1.0 * options.outHeight / options.outWidth);
|
|||
|
|
} else {
|
|||
|
|
newWidth = (int) (newHeight * 1.0 * options.outWidth / options.outHeight);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
options.inJustDecodeBounds = false;
|
|||
|
|
|
|||
|
|
Log.i(TAG, "bitmap required size=" + newWidth + "x" + newHeight + ", orig=" + options.outWidth + "x" + options.outHeight + ", sample=" + options.inSampleSize);
|
|||
|
|
Bitmap bm = BitmapFactory.decodeFile(path, options);
|
|||
|
|
if (bm == null) {
|
|||
|
|
Log.e(TAG, "bitmap decode failed");
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
Log.i(TAG, "bitmap decoded size=" + bm.getWidth() + "x" + bm.getHeight());
|
|||
|
|
final Bitmap scale = Bitmap.createScaledBitmap(bm, newWidth, newHeight, true);
|
|||
|
|
if (scale != null) {
|
|||
|
|
bm.recycle();
|
|||
|
|
bm = scale;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (crop) {
|
|||
|
|
final Bitmap cropped = Bitmap.createBitmap(bm, (bm.getWidth() - width) >> 1, (bm.getHeight() - height) >> 1, width, height);
|
|||
|
|
if (cropped == null) {
|
|||
|
|
return bm;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
bm.recycle();
|
|||
|
|
bm = cropped;
|
|||
|
|
Log.i(TAG, "bitmap croped size=" + bm.getWidth() + "x" + bm.getHeight());
|
|||
|
|
}
|
|||
|
|
return bm;
|
|||
|
|
|
|||
|
|
} catch (final OutOfMemoryError e) {
|
|||
|
|
Log.e(TAG, "decode bitmap failed: " + e.getMessage());
|
|||
|
|
options = null;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public static final void showResultDialog(Context context, String msg,
|
|||
|
|
String title) {
|
|||
|
|
if(msg == null) return;
|
|||
|
|
String rmsg = msg.replace(",", "\n");
|
|||
|
|
Log.d("Util", rmsg);
|
|||
|
|
new AlertDialog.Builder(context).setTitle(title).setMessage(rmsg)
|
|||
|
|
.setNegativeButton("知道了", null).create().show();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public static final void showProgressDialog(Context context, String title,
|
|||
|
|
String message) {
|
|||
|
|
dismissDialog();
|
|||
|
|
if (TextUtils.isEmpty(title)) {
|
|||
|
|
title = "请稍候";
|
|||
|
|
}
|
|||
|
|
if (TextUtils.isEmpty(message)) {
|
|||
|
|
message = "正在加载...";
|
|||
|
|
}
|
|||
|
|
mProgressDialog = ProgressDialog.show(context, title, message);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public static AlertDialog showConfirmCancelDialog(Context context,
|
|||
|
|
String title, String message,
|
|||
|
|
DialogInterface.OnClickListener posListener) {
|
|||
|
|
AlertDialog dlg = new AlertDialog.Builder(context).setMessage(message)
|
|||
|
|
.setPositiveButton("确认", posListener)
|
|||
|
|
.setNegativeButton("取消", null).create();
|
|||
|
|
dlg.setCanceledOnTouchOutside(false);
|
|||
|
|
dlg.show();
|
|||
|
|
return dlg;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public static final void dismissDialog() {
|
|||
|
|
if (mProgressDialog != null) {
|
|||
|
|
mProgressDialog.dismiss();
|
|||
|
|
mProgressDialog = null;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* 打印消息并且用Toast显示消息
|
|||
|
|
*
|
|||
|
|
* @param activity
|
|||
|
|
* @param message
|
|||
|
|
* @param logLevel
|
|||
|
|
* 填d, w, e分别代表debug, warn, error; 默认是debug
|
|||
|
|
*/
|
|||
|
|
public static final void toastMessage(final Activity activity,
|
|||
|
|
final String message, String logLevel) {
|
|||
|
|
if ("w".equals(logLevel)) {
|
|||
|
|
Log.w("sdkDemo", message);
|
|||
|
|
} else if ("e".equals(logLevel)) {
|
|||
|
|
Log.e("sdkDemo", message);
|
|||
|
|
} else {
|
|||
|
|
Log.d("sdkDemo", message);
|
|||
|
|
}
|
|||
|
|
activity.runOnUiThread(new Runnable() {
|
|||
|
|
@Override
|
|||
|
|
public void run() {
|
|||
|
|
// TODO Auto-generated method stub
|
|||
|
|
if (mToast != null) {
|
|||
|
|
mToast.cancel();
|
|||
|
|
mToast = null;
|
|||
|
|
}
|
|||
|
|
mToast = Toast.makeText(activity, message, Toast.LENGTH_SHORT);
|
|||
|
|
mToast.show();
|
|||
|
|
}
|
|||
|
|
});
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* 打印消息并且用Toast显示消息
|
|||
|
|
*
|
|||
|
|
* @param activity
|
|||
|
|
* @param message
|
|||
|
|
* @param logLevel
|
|||
|
|
* 填d, w, e分别代表debug, warn, error; 默认是debug
|
|||
|
|
*/
|
|||
|
|
public static final void toastMessage(final Activity activity,
|
|||
|
|
final String message) {
|
|||
|
|
toastMessage(activity, message, null);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* 根据一个网络连接(String)获取bitmap图像
|
|||
|
|
*
|
|||
|
|
* @param imageUri
|
|||
|
|
* @return
|
|||
|
|
* @throws MalformedURLException
|
|||
|
|
*/
|
|||
|
|
public static Bitmap getbitmap(String imageUri) {
|
|||
|
|
Log.v(TAG, "getbitmap:" + imageUri);
|
|||
|
|
// 显示网络上的图片
|
|||
|
|
Bitmap bitmap = null;
|
|||
|
|
try {
|
|||
|
|
URL myFileUrl = new URL(imageUri);
|
|||
|
|
HttpURLConnection conn = (HttpURLConnection) myFileUrl
|
|||
|
|
.openConnection();
|
|||
|
|
conn.setDoInput(true);
|
|||
|
|
conn.connect();
|
|||
|
|
InputStream is = conn.getInputStream();
|
|||
|
|
bitmap = BitmapFactory.decodeStream(is);
|
|||
|
|
is.close();
|
|||
|
|
|
|||
|
|
Log.v(TAG, "image download finished." + imageUri);
|
|||
|
|
} catch (OutOfMemoryError e) {
|
|||
|
|
e.printStackTrace();
|
|||
|
|
bitmap = null;
|
|||
|
|
} catch (IOException e) {
|
|||
|
|
e.printStackTrace();
|
|||
|
|
Log.v(TAG, "getbitmap bmp fail---");
|
|||
|
|
bitmap = null;
|
|||
|
|
}
|
|||
|
|
return bitmap;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public static void release() {
|
|||
|
|
mProgressDialog = null;
|
|||
|
|
mToast = null;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// =========
|
|||
|
|
// =通过URI获取本地图片的path
|
|||
|
|
// =兼容android 5.0
|
|||
|
|
// ==========
|
|||
|
|
|
|||
|
|
public static String ACTION_OPEN_DOCUMENT = "android.intent.action.OPEN_DOCUMENT";
|
|||
|
|
public static int Build_VERSION_KITKAT = 19;
|
|||
|
|
public static String getPath(final Context context, final Uri uri) {
|
|||
|
|
|
|||
|
|
final boolean isKitKat = Build.VERSION.SDK_INT >= 19;
|
|||
|
|
|
|||
|
|
// DocumentProvider
|
|||
|
|
if (isKitKat && isDocumentUri(context, uri)) {
|
|||
|
|
// ExternalStorageProvider
|
|||
|
|
if (isExternalStorageDocument(uri)) {
|
|||
|
|
final String docId = getDocumentId(uri);
|
|||
|
|
final String[] split = docId.split(":");
|
|||
|
|
final String type = split[0];
|
|||
|
|
|
|||
|
|
if ("primary".equalsIgnoreCase(type)) {
|
|||
|
|
return Environment.getExternalStorageDirectory() + "/" + split[1];
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
}
|
|||
|
|
// DownloadsProvider
|
|||
|
|
else if (isDownloadsDocument(uri)) {
|
|||
|
|
|
|||
|
|
final String id = getDocumentId(uri);
|
|||
|
|
final Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"),
|
|||
|
|
Long.valueOf(id));
|
|||
|
|
|
|||
|
|
return getDataColumn(context, contentUri, null, null);
|
|||
|
|
}
|
|||
|
|
// MediaProvider
|
|||
|
|
else if (isMediaDocument(uri)) {
|
|||
|
|
final String docId = getDocumentId(uri);
|
|||
|
|
final String[] split = docId.split(":");
|
|||
|
|
final String type = split[0];
|
|||
|
|
|
|||
|
|
Uri contentUri = null;
|
|||
|
|
if ("image".equals(type)) {
|
|||
|
|
contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
|
|||
|
|
} else if ("video".equals(type)) {
|
|||
|
|
contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
|
|||
|
|
} else if ("audio".equals(type)) {
|
|||
|
|
contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
final String selection = "_id=?";
|
|||
|
|
final String[] selectionArgs = new String[] { split[1] };
|
|||
|
|
|
|||
|
|
return getDataColumn(context, contentUri, selection, selectionArgs);
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
// MediaStore (and general)
|
|||
|
|
else if ("content".equalsIgnoreCase(uri.getScheme())) {
|
|||
|
|
|
|||
|
|
// Return the remote address
|
|||
|
|
if (isGooglePhotosUri(uri))
|
|||
|
|
return uri.getLastPathSegment();
|
|||
|
|
|
|||
|
|
return getDataColumn(context, uri, null, null);
|
|||
|
|
}
|
|||
|
|
// File
|
|||
|
|
else if ("file".equalsIgnoreCase(uri.getScheme())) {
|
|||
|
|
return uri.getPath();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private static final String PATH_DOCUMENT = "document";
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Test if the given URI represents a {@link Document} backed by a
|
|||
|
|
* {@link DocumentsProvider}.
|
|||
|
|
*/
|
|||
|
|
private static boolean isDocumentUri(Context context, Uri uri) {
|
|||
|
|
final List<String> paths = uri.getPathSegments();
|
|||
|
|
if (paths.size() < 2) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
if (!PATH_DOCUMENT.equals(paths.get(0))) {
|
|||
|
|
return false;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private static String getDocumentId(Uri documentUri) {
|
|||
|
|
final List<String> paths = documentUri.getPathSegments();
|
|||
|
|
if (paths.size() < 2) {
|
|||
|
|
throw new IllegalArgumentException("Not a document: " + documentUri);
|
|||
|
|
}
|
|||
|
|
if (!PATH_DOCUMENT.equals(paths.get(0))) {
|
|||
|
|
throw new IllegalArgumentException("Not a document: " + documentUri);
|
|||
|
|
}
|
|||
|
|
return paths.get(1);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* Get the value of the data column for this Uri. This is useful for
|
|||
|
|
* MediaStore Uris, and other file-based ContentProviders.
|
|||
|
|
*
|
|||
|
|
* @param context
|
|||
|
|
* The context.
|
|||
|
|
* @param uri
|
|||
|
|
* The Uri to query.
|
|||
|
|
* @param selection
|
|||
|
|
* (Optional) Filter used in the query.
|
|||
|
|
* @param selectionArgs
|
|||
|
|
* (Optional) Selection arguments used in the query.
|
|||
|
|
* [url=home.php?mod=space&uid=7300]@return[/url] The value of
|
|||
|
|
* the _data column, which is typically a file path.
|
|||
|
|
*/
|
|||
|
|
public static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {
|
|||
|
|
|
|||
|
|
Cursor cursor = null;
|
|||
|
|
final String column = "_data";
|
|||
|
|
final String[] projection = { column };
|
|||
|
|
|
|||
|
|
try {
|
|||
|
|
cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null);
|
|||
|
|
if (cursor != null && cursor.moveToFirst()) {
|
|||
|
|
final int index = cursor.getColumnIndexOrThrow(column);
|
|||
|
|
return cursor.getString(index);
|
|||
|
|
}
|
|||
|
|
} finally {
|
|||
|
|
if (cursor != null)
|
|||
|
|
cursor.close();
|
|||
|
|
}
|
|||
|
|
return null;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* @param uri
|
|||
|
|
* The Uri to check.
|
|||
|
|
* @return Whether the Uri authority is ExternalStorageProvider.
|
|||
|
|
*/
|
|||
|
|
public static boolean isExternalStorageDocument(Uri uri) {
|
|||
|
|
return "com.android.externalstorage.documents".equals(uri.getAuthority());
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* @param uri
|
|||
|
|
* The Uri to check.
|
|||
|
|
* @return Whether the Uri authority is DownloadsProvider.
|
|||
|
|
*/
|
|||
|
|
public static boolean isDownloadsDocument(Uri uri) {
|
|||
|
|
return "com.android.providers.downloads.documents".equals(uri.getAuthority());
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* @param uri
|
|||
|
|
* The Uri to check.
|
|||
|
|
* @return Whether the Uri authority is MediaProvider.
|
|||
|
|
*/
|
|||
|
|
public static boolean isMediaDocument(Uri uri) {
|
|||
|
|
return "com.android.providers.media.documents".equals(uri.getAuthority());
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* @param uri
|
|||
|
|
* The Uri to check.
|
|||
|
|
* @return Whether the Uri authority is Google Photos.
|
|||
|
|
*/
|
|||
|
|
public static boolean isGooglePhotosUri(Uri uri) {
|
|||
|
|
return "com.google.android.apps.photos.content".equals(uri.getAuthority());
|
|||
|
|
}
|
|||
|
|
}
|