Android Bitmap与DrawAble与byte[]与InputStream之间的转换工具-优快云博客

本文介绍了一个用于Android平台的格式转换工具类，该工具类能够实现Bitmap、Drawable、byte[]及InputStream之间的相互转换，并提供了具体的方法实现。

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package com.soai.imdemo;

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

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;

/**

Bitmap与DrawAble与byte[]与InputStream之间的转换工具类
@author Administrator

*/ public class FormatTools { private static FormatTools tools = new FormatTools();

public static FormatTools getInstance() {
	if (tools == null) {
		tools = new FormatTools();
		return tools;
	}
	return tools;
}

// 将byte[]转换成InputStream
public InputStream Byte2InputStream(byte[] b) {
	ByteArrayInputStream bais = new ByteArrayInputStream(b);
	return bais;
}

// 将InputStream转换成byte[]
public 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
public 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
public 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
public Bitmap InputStream2Bitmap(InputStream is) {
	return BitmapFactory.decodeStream(is);
}

// Drawable转换成InputStream
public InputStream Drawable2InputStream(Drawable d) {
	Bitmap bitmap = this.drawable2Bitmap(d);
	return this.Bitmap2InputStream(bitmap);
}

// InputStream转换成Drawable
public Drawable InputStream2Drawable(InputStream is) {
	Bitmap bitmap = this.InputStream2Bitmap(is);
	return this.bitmap2Drawable(bitmap);
}

// Drawable转换成byte[]
public byte[] Drawable2Bytes(Drawable d) {
	Bitmap bitmap = this.drawable2Bitmap(d);
	return this.Bitmap2Bytes(bitmap);
}

// byte[]转换成Drawable
public Drawable Bytes2Drawable(byte[] b) {
	Bitmap bitmap = this.Bytes2Bitmap(b);
	return this.bitmap2Drawable(bitmap);
}

// Bitmap转换成byte[]
public byte[] Bitmap2Bytes(Bitmap bm) {
	ByteArrayOutputStream baos = new ByteArrayOutputStream();
	bm.compress(Bitmap.CompressFormat.PNG, 100, baos);
	return baos.toByteArray();
}

// byte[]转换成Bitmap
public Bitmap Bytes2Bitmap(byte[] b) {
	if (b.length != 0) {
		return BitmapFactory.decodeByteArray(b, 0, b.length);
	}
	return null;
}

// Drawable转换成Bitmap
public 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
public Drawable bitmap2Drawable(Bitmap bitmap) {
	BitmapDrawable bd = new BitmapDrawable(bitmap);
	Drawable d = (Drawable) bd;
	return d;
}

}

转载于:https://my.oschina.net/sfshine/blog/680549