Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Apache License 

import android.content.ClipData;
import android.content.ClipDescription;
import android.content.Intent;
import android.net.Uri;
import android.text.Html;
import android.text.Spanned;

public class Main {
    private final static char[] DIGITS = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd',
            'e', 'f', };
    private final static int NUM_LEN = 8;
    private final static int FLAG_NULL = -1;
    private final static int FLAG_INT = -2;
    private final static int FLAG_SPANNED = -3;

    /**
     * Convert {@link ClipData} to String for storing.
     * @param clip
     * @return String for specifed clipdata
     */
    public static CharSequence stringFromClipData(ClipData clip) {
        StringBuilder sb = new StringBuilder();
        if (clip != null) {
            append(sb, "clip");
            appendClipDescription(sb, clip.getDescription());
            int n = clip.getItemCount();
            appendInt(sb, n);
            for (int i = 0; i < n; i++) {
                appendItem(sb, clip.getItemAt(i));
            }
        } else {
            append(sb, (String) null);
        }
        return sb;
    }

    private static void append(StringBuilder sb, CharSequence... data) {
        for (CharSequence d : data) {
            if (d != null) {
                if (d instanceof Spanned) {
                    String s = Html.toHtml((Spanned) d);
                    sb.append(hexStringFromInt(FLAG_SPANNED, NUM_LEN));
                    append(sb, s);
                } else {
                    int len = d.length();
                    sb.append(hexStringFromInt(len, NUM_LEN)).append(d);
                }
            } else {
                sb.append(hexStringFromInt(FLAG_NULL, NUM_LEN));
            }
        }
    }

    private static void appendClipDescription(StringBuilder sb, ClipDescription desc) {
        if (desc != null) {
            append(sb, "desc", desc.getLabel());
            int n = desc.getMimeTypeCount();
            appendInt(sb, n);
            for (int i = 0; i < n; i++) {
                append(sb, desc.getMimeType(i));
            }
        } else {
            append(sb, (String) null);
        }
    }

    private static void appendInt(StringBuilder sb, int i) {
        sb.append(hexStringFromInt(FLAG_INT, NUM_LEN)).append(hexStringFromInt(i, NUM_LEN));
    }

    private static void appendItem(StringBuilder sb, ClipData.Item item) {
        if (item != null) {
            append(sb, "item", item.getText(), item.getHtmlText());
            appendIntent(sb, item.getIntent());
            appendUri(sb, item.getUri());
        } else {
            append(sb, (String) null);
        }
    }

    /**
     * Return the hex string for specified integer. 
     * @param i
     * @param minWidth
     * @return the hex string like 0f3e
     */
    public static String hexStringFromInt(int i, int minWidth) {
        final int len = 8;
        char[] buf = new char[len];
        int cursor = len;

        do {
            buf[--cursor] = DIGITS[i & 0x0f];
        } while ((i >>>= 4) != 0 || (len - cursor < minWidth));

        return new String(buf, cursor, len - cursor);
    }

    private static void appendIntent(StringBuilder sb, Intent intent) {
        if (intent != null) {
            String uri = intent.toUri(Intent.URI_INTENT_SCHEME);
            String action = intent.getAction();
            append(sb, "intent", action, uri);
        } else {
            append(sb, (String) null);
        }
    }

    private static void appendUri(StringBuilder sb, Uri uri) {
        append(sb, uri == null ? null : uri.toString());
    }

    /**
     * toString method for values include null
     * @param cs
     * @return the string
     */
    public static String toString(CharSequence cs) {
        return cs == null ? null : cs.toString();
    }
}