android 一些数据转换方法

android 一些数据转换方法

package com.ai9475.util;

import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.PixelFormat;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;

/**
* 数据格式转换工具类
*
* Created by ZHOUZ on 14-2-15.
*/
public class ZFormat
{
private ZFormat() { }

/**
* 将byte[]转换成InputStream
*
* @param b
* @return
*/
public static InputStream byte2InputStream(byte[] b) {
ByteArrayInputStream bais = new ByteArrayInputStream(b);
return bais;
}

/**
* 将InputStream转换成byte[]
*
* @param is
* @return
*/
public static byte[] inputStream2Bytes(InputStream is) {
String str = "";
byte[] readByte = new byte[1024];
int readCount = -1;
try {
while ((readCount = is.read(readByte, 0, 1024)) != -1) {
str += new String(readByte).trim();
}
return str.getBytes();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}

/**
* 将Bitmap转换成InputStream
*
* @param bm
* @return
*/
public static InputStream bitmap2InputStream(Bitmap bm) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.JPEG, 100, baos);
InputStream is = new ByteArrayInputStream(baos.toByteArray());
return is;
}

/**
* 将Bitmap转换成InputStream
*
* @param bm
* @param quality
* @return
*/
public static InputStream bitmap2InputStream(Bitmap bm, int quality) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.PNG, quality, baos);
InputStream is = new ByteArrayInputStream(baos.toByteArray());
return is;
}

/**
* 将InputStream转换成Bitmap
*
* @param is
* @return
*/
public static Bitmap inputStream2Bitmap(InputStream is) {
return BitmapFactory.decodeStream(is);
}

// Drawable转换成InputStream
public static InputStream drawable2InputStream(Drawable d) {
Bitmap bitmap = drawable2Bitmap(d);
return bitmap2InputStream(bitmap);
}

/**
* InputStream转换成Drawable
*
* @param context
* @param is
* @return
*/
public static Drawable inputStream2Drawable(Context context, InputStream is) {
Bitmap bitmap = inputStream2Bitmap(is);
return bitmap2Drawable(context, bitmap);
}

/**
* Drawable转换成byte[]
*
* @param d
* @return
*/
public static byte[] drawable2Bytes(Drawable d) {
Bitmap bitmap = drawable2Bitmap(d);
return bitmap2Bytes(bitmap);
}

/**
* byte[]转换成Drawable
*
* @param context
* @param b
* @return
*/
public static Drawable bytes2Drawable(Context context, byte[] b) {
Bitmap bitmap = bytes2Bitmap(b);
return bitmap2Drawable(context, bitmap);
}

/**
* Bitmap转换成byte[]
*
* @param bm
* @return
*/
public static byte[] bitmap2Bytes(Bitmap bm) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.PNG, 100, baos);
return baos.toByteArray();
}

/**
* byte[]转换成Bitmap
*
* @param b
* @return
*/
public static Bitmap bytes2Bitmap(byte[] b) {
if (b.length != 0) {
return BitmapFactory.decodeByteArray(b, 0, b.length);
}
return null;
}

/**
* Drawable转换成Bitmap
*
* @param drawable
* @return
*/
public static Bitmap drawable2Bitmap(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);
drawable.setBounds(0, 0, drawable.getIntrinsicWidth(),
drawable.getIntrinsicHeight());
drawable.draw(canvas);
return bitmap;
}

/**
* Bitmap转换成Drawable
*
* @param context
* @param bitmap
* @return
*/
public static Drawable bitmap2Drawable(Context context, Bitmap bitmap) {
Resources res = context.getResources();
BitmapDrawable bd = new BitmapDrawable(res, bitmap);
Drawable d = (Drawable) bd;
return d;
}
}