android图片转换代码

android图片转换代码

package com.sl.test.ui.manage;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.graphics.PixelFormat;
import android.graphics.drawable.Drawable;
import android.location.Location;
import android.view.View;
import android.widget.TabHost;
import android.widget.TabWidget;
import android.widget.TextView;
import com.baidu.mapapi.GeoPoint;
import com.sl.quwei.R;
import df.util.type.StringUtil;
import org.xbill.DNS.utils.base64;

import java.io.ByteArrayOutputStream;

/**
 * Created by IntelliJ IDEA.
 * User: wulong
 * Date: 11-10-27
 * Time: 上午6:31
 * To change this template use File | Settings | File Templates.
 */
public class AggTools {
    /**
     * @param val
     * @return
     */
    public final static double latLangFromIntToDouble(int val) {
        return (double) (val / 1E6);
    }

    public final static int latLangFromDoubleToInt(double val) {
        return (int) (val * 1E6);
    }

    public static boolean setTabBackgroundColor(Context context, TabHost tabhost, int focusColor, int releaseColor) {
        final TabWidget tabwidget = tabhost.getTabWidget();

        for (int i = 0; i < tabwidget.getChildCount(); i++) {
            View v = tabwidget.getChildAt(i);
            if (tabhost.getCurrentTab() == i) {
                v.setBackgroundColor(context.getResources().getColor(R.color.color_tab_light_orange));//R.color.color_tab_light_orange);
                //更改tab标题颜色
                final TextView tv = (TextView) tabwidget.getChildAt(i).findViewById(android.R.id.title);
                tv.setTextColor(context.getResources().getColorStateList(android.R.color.darker_gray));
            } else {
                v.setBackgroundColor(context.getResources().getColor(R.color.color_tab_brown));//0xffE59500);//R.color.color_tab_brown);
                //更改tab标题颜色
                final TextView tv = (TextView) tabwidget.getChildAt(i).findViewById(android.R.id.title);
                tv.setTextColor(context.getResources().getColorStateList(android.R.color.white));
            }
        }

        return true;
    }

    public static String getNewTitle(CharSequence oldTitle, String loginName) {
        String title = "" + oldTitle;
        String showTitle;

        if (title.contains(loginName)) {
            showTitle = title;
        } else {
            showTitle = title + ":" + loginName;
        }
        return showTitle;
    }

    public static Bitmap drawableToBitmap(Drawable drawable) {
        Bitmap bitmap = Bitmap
                .createBitmap(
                        drawable.getIntrinsicWidth(),
                        drawable.getIntrinsicHeight(),
                        drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
                                : Bitmap.Config.RGB_565);
//        Canvas canvas = new Canvas(bitmap);
//        //canvas.setBitmap(bitmap);
//        drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
//        drawable.draw(canvas);
        return bitmap;
    }

    /**
     *  字符串转bitmap
     * @param in
     * @return
     */
    public static Bitmap convertAvatarFromStringToBitmap(String in) {
        if (StringUtil.empty(in)) {
            return null;
        }

        byte[] byteBuf = base64.fromString(in);
        if (null == byteBuf) {
            return null;
        }

        Bitmap bitImg = bytes2Bimap(byteBuf);
        return bitImg;
    }

    /**
     * 将图片按指定质量转成字符串格式
     * @param src
     * @param quality
     * @return
     */
    public static String convertAvatarFromBitmapToString(Bitmap src, int quality) {
        if (null == src) {
            return "";
        }

        if (quality < 0) {
            quality = 0;
        } else if (quality > 100) {
            quality = 100;
        }

        byte[] byteBuf = bitmap2Bytes(src, quality);

        if (null == byteBuf) {
            return "";
        }

        String hexBuf = base64.toString(byteBuf);
        return hexBuf;
    }

    /**
     * 图片按指定高度等比缩小
     * @param map
     * @param dstH
     * @return
     */
    public static Bitmap resizeBitmap(Bitmap map, int dstH) {
        if (null == map) {
            return null;
        }
        int width = map.getWidth();
        int height = map.getHeight();
        int dstHeight = dstH;
        int dstWidth = (map.getWidth() / (map.getHeight() / dstHeight));
        float scaleWid = ((float) dstWidth) / width;
        float scaleHeight = ((float) dstHeight) / height;
        Matrix matrix = new Matrix();

        matrix.postScale(scaleWid, scaleHeight);
        Bitmap resizeMap = Bitmap.createBitmap(map, 0, 0, width, height, matrix, true);
        return resizeMap;
    }

    public static byte[] bitmap2Bytes(Bitmap bm, int quality) {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        if (quality < 0) {
            quality = 0;
        } else if (quality > 100) {
            quality = 100;
        }
        bm.compress(Bitmap.CompressFormat.PNG, quality, baos);
        return baos.toByteArray();
    }

    public static Bitmap bytes2Bimap(final byte[] b) {
        if (b.length != 0) {
            return BitmapFactory.decodeByteArray(b, 0, b.length);
        } else {
            return null;
        }
    }

    public static float getDistance(GeoPoint src, GeoPoint dest) {
        int lat1 = src.getLatitudeE6();
        int lng1 = src.getLongitudeE6();
        int lat2 = dest.getLatitudeE6();
        int lng2 = dest.getLongitudeE6();
        float[] results = new float[3];

        Location.distanceBetween(AggTools.latLangFromIntToDouble(lat1),
                AggTools.latLangFromIntToDouble(lng1),
                AggTools.latLangFromIntToDouble(lat2),
                AggTools.latLangFromIntToDouble(lng2),
                results);
        return results[0];
    }

}