Android实现将Base64Encoder编码转为图片学习笔记（二）

关于

关于将图片转换为base64编码的方法，请参考文章Android使用 BASE64Encoder实现图片的Base64编码转换（可用来存储到数据库中）学习笔记（一）本文直接在上一篇基础上修改。

效果

实现第一步，修改activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:orientation="vertical">

    <android.support.v7.widget.Toolbar
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:background="@color/colorPrimaryDark">

    </android.support.v7.widget.Toolbar>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:orientation="vertical">
        <ImageView
            android:id="@+id/image_base64"
            android:layout_width="150dp"
            android:layout_height="150dp"
            />
        <EditText
            android:id="@+id/edit_base664"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />
    </LinearLayout>
    <Button
        android:id="@+id/btn_photo"
        style="?android:attr/borderlessButtonStyle"
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:layout_marginTop="5dp"
        android:layout_marginBottom="25dp"
    android:text="拍照"
    android:textSize="16sp" />
    <Button
        android:id="@+id/btn_jiema"
        android:text="解码"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <ImageView
        android:id="@+id/ima_jiema"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />


</LinearLayout>

第二步，修改CharacterEncoder.java

package com.example.a13115.blog;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintStream;
import java.nio.ByteBuffer;

public abstract class CharacterEncoder {
   
    protected PrintStream pStream;

    protected abstract int bytesPerAtom();

    protected abstract int bytesPerLine();

    protected void encodeBufferPrefix(OutputStream paramOutputStream)
            throws IOException {
   
        this.pStream = new PrintStream(paramOutputStream);
    }

    protected void encodeBufferSuffix(OutputStream paramOutputStream)
            throws IOException {
   
    }

    protected void encodeLinePrefix(OutputStream paramOutputStream, int paramInt)
            throws IOException {
   
    }

    protected void encodeLineSuffix(OutputStream paramOutputStream)
            throws IOException {
   
        this.pStream.println();
    }

    protected abstract void encodeAtom(OutputStream paramOutputStream, byte[] paramArrayOfByte, int paramInt1, int paramInt2)
            throws IOException;

    protected int readFully(InputStream paramInputStream, byte[] paramArrayOfByte)
            throws IOException {
   
        for (int i = 0; i < paramArrayOfByte.length; i++) {
   
            int j = paramInputStream.read();
            if (j == -1) {
   
                return i;
            }
            paramArrayOfByte[i] = ((byte) j);
        }
        return paramArrayOfByte.length;
    }

    public void encode(InputStream paramInputStream, OutputStream paramOutputStream)
            throws IOException {
   
        byte[] arrayOfByte = new byte[b