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Android 关于头像裁剪上传的实现

2017-03-02 14:32 651 查看
本篇文章纯属转载，原版请移步至：http://www.apkbus.com/forum.php?mod=viewthread&tid=52710

最近有看到有朋友在讨论QQ头像的裁剪上传是怎么实现的，吼吼，小马也没做过，好奇之下学习下，发现以前项目中有类型的功能，结合官方文档里面的解释，就更好玩了，周末，急急忙忙写的，记录在博客里，希望能与大家交流学习，也恳请高手能解答小马在代码注释中提出的疑问，不管有没有人回答，小马先谢谢了，一样的，先看下效果图（效果图小马不解释了，直接流水写下去，小马是直接在模拟器里写的，能在真机上使用，因为很简单），再看代码是怎么实现的：

一：主布局界面



二：点击控件触发事件后效果图



三：拍照完之后效果图



四：裁剪界面效果图



五：点击相册后返回的图片效果图



六：裁剪完从相册PICK的保存后的效果图



下面直接来看下主控制类代码，如下：

package com.xiaoma.piccut.demo;

import java.io.File;

import android.app.Activity;

import android.app.AlertDialog;

import android.content.DialogInterface;

import android.content.Intent;

import android.graphics.Bitmap;

import android.graphics.drawable.BitmapDrawable;

import android.graphics.drawable.Drawable;

import android.net.Uri;

import android.os.Bundle;

import android.os.Environment;

import android.provider.MediaStore;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.ImageButton;

import android.widget.ImageView;

/**

* @Title: PicCutDemoActivity.java

* @Package com.xiaoma.piccut.demo

* @Description: 图片裁剪功能测试

* @author XiaoMa

*/

public class PicCutDemoActivity extends Activity implements OnClickListener {

private ImageButton ib = null;

private ImageView iv = null;

private Button btn = null;

private String tp = null;

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

//初始化

init();

}

/**

* 初始化方法实现

*/

private void init() {

ib = (ImageButton) findViewById(R.id.imageButton1);

iv = (ImageView) findViewById(R.id.imageView1);

btn = (Button) findViewById(R.id.button1);

ib.setOnClickListener(this);

iv.setOnClickListener(this);

btn.setOnClickListener(this);

}

/**

* 控件点击事件实现

*

* 因为有朋友问不同控件的背景图裁剪怎么实现，

* 我就在这个地方用了三个控件，只为了自己记录学习

* 大家觉得没用的可以跳过啦

*/

@Override

public void onClick(View v) {

switch (v.getId()) {

case R.id.imageButton1:

ShowPickDialog();

break;

case R.id.imageView1:

ShowPickDialog();

break;

case R.id.button1:

ShowPickDialog();

break;

default:

break;

}

}

/**

* 选择提示对话框

*/

private void ShowPickDialog() {

new AlertDialog.Builder(this)

.setTitle("设置头像...")

.setNegativeButton("相册", new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog, int which) {

dialog.dismiss();

/**

* 刚开始，我自己也不知道ACTION_PICK是干嘛的，后来直接看Intent源码，

* 可以发现里面很多东西，Intent是个很强大的东西，大家一定仔细阅读下

*/

Intent intent = new Intent(Intent.ACTION_PICK, null);

/**

* 下面这句话，与其它方式写是一样的效果，如果：

* intent.setData(MediaStore.Images.Media.EXTERNAL_CONTENT_URI);

* intent.setType(""image/*");设置数据类型

* 如果朋友们要限制上传到服务器的图片类型时可以直接写如："image/jpeg 、 image/png等的类型"

* 这个地方小马有个疑问，希望高手解答下：就是这个数据URI与类型为什么要分两种形式来写呀？有什么区别？

*/

intent.setDataAndType(

MediaStore.Images.Media.EXTERNAL_CONTENT_URI,

"image/*");

startActivityForResult(intent, 1);

}

})

.setPositiveButton("拍照", new DialogInterface.OnClickListener() {

public void onClick(DialogInterface dialog, int whichButton) {

dialog.dismiss();

/**

* 下面这句还是老样子，调用快速拍照功能，至于为什么叫快速拍照，大家可以参考如下官方

* 文档，you_sdk_path/docs/guide/topics/media/camera.html

* 我刚看的时候因为太长就认真看，其实是错的，这个里面有用的太多了，所以大家不要认为

* 官方文档太长了就不看了，其实是错的，这个地方小马也错了，必须改正

*/

Intent intent = new Intent(

MediaStore.ACTION_IMAGE_CAPTURE);

//下面这句指定调用相机拍照后的照片存储的路径

intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri

.fromFile(new File(Environment

.getExternalStorageDirectory(),

"xiaoma.jpg")));

startActivityForResult(intent, 2);

}

}).show();

}

@Override

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

switch (requestCode) {

// 如果是直接从相册获取

case 1:

startPhotoZoom(data.getData());

break;

// 如果是调用相机拍照时

case 2:

File temp = new File(Environment.getExternalStorageDirectory()

+ "/xiaoma.jpg");

startPhotoZoom(Uri.fromFile(temp));

break;

// 取得裁剪后的图片

case 3:

/**

* 非空判断大家一定要验证，如果不验证的话，

* 在剪裁之后如果发现不满意，要重新裁剪，丢弃

* 当前功能时，会报NullException，小马只

* 在这个地方加下，大家可以根据不同情况在合适的

* 地方做判断处理类似情况

*

*/

if(data != null){

setPicToView(data);

}

break;

default:

break;

}

super.onActivityResult(requestCode, resultCode, data);

}

/**

* 裁剪图片方法实现

* @param uri

*/

public void startPhotoZoom(Uri uri) {

/*

* 至于下面这个Intent的ACTION是怎么知道的，大家可以看下自己路径下的如下网页

* yourself_sdk_path/docs/reference/android/content/Intent.html

* 直接在里面Ctrl+F搜：CROP ，之前小马没仔细看过，其实安卓系统早已经有自带图片裁剪功能,

* 是直接调本地库的，小马不懂C C++ 这个不做详细了解去了，有轮子就用轮子，不再研究轮子是怎么

* 制做的了...吼吼

*/

Intent intent = new Intent("com.android.camera.action.CROP");

intent.setDataAndType(uri, "image/*");

//下面这个crop=true是设置在开启的Intent中设置显示的VIEW可裁剪

intent.putExtra("crop", "true");

// aspectX aspectY 是宽高的比例

intent.putExtra("aspectX", 1);

intent.putExtra("aspectY", 1);

// outputX outputY 是裁剪图片宽高

intent.putExtra("outputX", 150);

intent.putExtra("outputY", 150);

intent.putExtra("return-data", true);

startActivityForResult(intent, 3);

}

/**

* 保存裁剪之后的图片数据

* @param picdata

*/

private void setPicToView(Intent picdata) {

Bundle extras = picdata.getExtras();

if (extras != null) {

Bitmap photo = extras.getParcelable("data");

Drawable drawable = new BitmapDrawable(photo);

/**

* 下面注释的方法是将裁剪之后的图片以Base64Coder的字符方式上

* 传到服务器，QQ头像上传采用的方法跟这个类似

*/

/*ByteArrayOutputStream stream = new ByteArrayOutputStream();

photo.compress(Bitmap.CompressFormat.JPEG, 60, stream);

byte[] b = stream.toByteArray();

// 将图片流以字符串形式存储下来

tp = new String(Base64Coder.encodeLines(b));

这个地方大家可以写下给服务器上传图片的实现，直接把tp直接上传就可以了，

服务器处理的方法是服务器那边的事了，吼吼

如果下载到的服务器的数据还是以Base64Coder的形式的话，可以用以下方式转换

为我们可以用的图片类型就OK啦...吼吼

Bitmap dBitmap = BitmapFactory.decodeFile(tp);

Drawable drawable = new BitmapDrawable(dBitmap);

*/

ib.setBackgroundDrawable(drawable);

iv.setBackgroundDrawable(drawable);

}

}

}

复制代码
下面来看下裁剪中用到的类，大家详细看下头注释：

package com.xiaoma.piccut.demo;

/**

* 下面这些注释是下载这个类的时候本来就有的，本来要删除的，但看了下竟然是license，吼吼，

* 好东西，留在注释里，以备不时之用，大家有需要加license的可以到下面的网址找哦

*/

//EPL, Eclipse Public License, V1.0 or later, http://www.eclipse.org/legal
//LGPL, GNU Lesser General Public License, V2.1 or later, http://www.gnu.org/licenses/lgpl.html
//GPL, GNU General Public License, V2 or later, http://www.gnu.org/licenses/gpl.html
//AL, Apache License, V2.0 or later, http://www.apache.org/licenses
//BSD, BSD License, http://www.opensource.org/licenses/bsd-license.php
/**

* A Base64 encoder/decoder.

*

* <p>

* This class is used to encode and decode data in Base64 format as described in RFC 1521.

*

* <p>

* Project home page: <a href="http://www.source-code.biz/base64coder/java/">www.source-code.biz/base64coder/java</a>

* Author: Christian d'Heureuse, Inventec Informatik AG, Zurich, Switzerland

* Multi-licensed: EPL / LGPL / GPL / AL / BSD.

*/

/**

* 这个类在上面注释的网址中有，大家可以自行下载下，也可以直接用这个，

* 公开的Base64Coder类（不用深究它是怎么实现的，

* 还是那句话，有轮子直接用轮子），好用的要死人了...

* 小马也很无耻的引用了这个网址下的东东，吼吼...

* @Title: Base64Coder.java

* @Package com.xiaoma.piccut.demo

* @Description: TODO

* @author XiaoMa

*/

public class Base64Coder {

//The line separator string of the operating system.

private static final String systemLineSeparator = System.getProperty("line.separator");

//Mapping table from 6-bit nibbles to Base64 characters.

private static char[] map1 = new char[64];

static {

int i=0;

for (char c='A'; c<='Z'; c++) map1[i++] = c;

for (char c='a'; c<='z'; c++) map1[i++] = c;

for (char c='0'; c<='9'; c++) map1[i++] = c;

map1[i++] = '+'; map1[i++] = '/'; }

//Mapping table from Base64 characters to 6-bit nibbles.

private static byte[] map2 = new byte[128];

static {

for (int i=0; i<map2.length; i++) map2[i] = -1;

for (int i=0; i<64; i++) map2[map1[i]] = (byte)i; }

/**

* Encodes a string into Base64 format.

* No blanks or line breaks are inserted.

* @param s A String to be encoded.

* @return A String containing the Base64 encoded data.

*/

public static String encodeString (String s) {

return new String(encode(s.getBytes())); }

/**

* Encodes a byte array into Base 64 format and breaks the output into lines of 76 characters.

* This method is compatible with <code>sun.misc.BASE64Encoder.encodeBuffer(byte[])</code>.

* @param in An array containing the data bytes to be encoded.

* @return A String containing the Base64 encoded data, broken into lines.

*/

public static String encodeLines (byte[] in) {

return encodeLines(in, 0, in.length, 76, systemLineSeparator); }

/**

* Encodes a byte array into Base 64 format and breaks the output into lines.

* @param in An array containing the data bytes to be encoded.

* @param iOff Offset of the first byte in <code>in</code> to be processed.

* @param iLen Number of bytes to be processed in <code>in</code>, starting at <code>iOff</code>.

* @param lineLen Line length for the output data. Should be a multiple of 4.

* @param lineSeparator The line separator to be used to separate the output lines.

* @return A String containing the Base64 encoded data, broken into lines.

*/

public static String encodeLines (byte[] in, int iOff, int iLen, int lineLen, String lineSeparator) {

int blockLen = (lineLen*3) / 4;

if (blockLen <= 0) throw new IllegalArgumentException();

int lines = (iLen+blockLen-1) / blockLen;

int bufLen = ((iLen+2)/3)*4 + lines*lineSeparator.length();

StringBuilder buf = new StringBuilder(bufLen);

int ip = 0;

while (ip < iLen) {

int l = Math.min(iLen-ip, blockLen);

buf.append (encode(in, iOff+ip, l));

buf.append (lineSeparator);

ip += l; }

return buf.toString(); }

/**

* Encodes a byte array into Base64 format.

* No blanks or line breaks are inserted in the output.

* @param in An array containing the data bytes to be encoded.

* @return A character array containing the Base64 encoded data.

*/

public static char[] encode (byte[] in) {

return encode(in, 0, in.length); }

/**

* Encodes a byte array into Base64 format.

* No blanks or line breaks are inserted in the output.

* @param in An array containing the data bytes to be encoded.

* @param iLen Number of bytes to process in <code>in</code>.

* @return A character array containing the Base64 encoded data.

*/

public static char[] encode (byte[] in, int iLen) {

return encode(in, 0, iLen); }

/**

* Encodes a byte array into Base64 format.

* No blanks or line breaks are inserted in the output.

* @param in An array containing the data bytes to be encoded.

* @param iOff Offset of the first byte in <code>in</code> to be processed.

* @param iLen Number of bytes to process in <code>in</code>, starting at <code>iOff</code>.

* @return A character array containing the Base64 encoded data.

*/

public static char[] encode (byte[] in, int iOff, int iLen) {

int oDataLen = (iLen*4+2)/3; // output length without padding

int oLen = ((iLen+2)/3)*4; // output length including padding

char[] out = new char[oLen];

int ip = iOff;

int iEnd = iOff + iLen;

int op = 0;

while (ip < iEnd) {

int i0 = in[ip++] & 0xff;

int i1 = ip < iEnd ? in[ip++] & 0xff : 0;

int i2 = ip < iEnd ? in[ip++] & 0xff : 0;

int o0 = i0 >>> 2;

int o1 = ((i0 & 3) << 4) | (i1 >>> 4);

int o2 = ((i1 & 0xf) << 2) | (i2 >>> 6);

int o3 = i2 & 0x3F;

out[op++] = map1[o0];

out[op++] = map1[o1];

out[op] = op < oDataLen ? map1[o2] : '='; op++;

out[op] = op < oDataLen ? map1[o3] : '='; op++; }

return out; }

/**

* Decodes a string from Base64 format.

* No blanks or line breaks are allowed within the Base64 encoded input data.

* @param s A Base64 String to be decoded.

* @return A String containing the decoded data.

* @throws IllegalArgumentException If the input is not valid Base64 encoded data.

*/

public static String decodeString (String s) {

return new String(decode(s)); }

/**

* Decodes a byte array from Base64 format and ignores line separators, tabs and blanks.

* CR, LF, Tab and Space characters are ignored in the input data.

* This method is compatible with <code>sun.misc.BASE64Decoder.decodeBuffer(String)</code>.

* @param s A Base64 String to be decoded.

* @return An array containing the decoded data bytes.

* @throws IllegalArgumentException If the input is not valid Base64 encoded data.

*/

public static byte[] decodeLines (String s) {

char[] buf = new char[s.length()+3];

int p = 0;

for (int ip = 0; ip < s.length(); ip++) {

char c = s.charAt(ip);

if (c != ' ' && c != '\r' && c != '\n' && c != '\t')

buf[p++] = c; }

while ((p % 4) != 0)

buf[p++] = '0';

return decode(buf, 0, p); }

/**

* Decodes a byte array from Base64 format.

* No blanks or line breaks are allowed within the Base64 encoded input data.

* @param s A Base64 String to be decoded.

* @return An array containing the decoded data bytes.

* @throws IllegalArgumentException If the input is not valid Base64 encoded data.

*/

public static byte[] decode (String s) {

return decode(s.toCharArray()); }

/**

* Decodes a byte array from Base64 format.

* No blanks or line breaks are allowed within the Base64 encoded input data.

* @param in A character array containing the Base64 encoded data.

* @return An array containing the decoded data bytes.

* @throws IllegalArgumentException If the input is not valid Base64 encoded data.

*/

public static byte[] decode (char[] in) {

return decode(in, 0, in.length); }

/**

* Decodes a byte array from Base64 format.

* No blanks or line breaks are allowed within the Base64 encoded input data.

* @param in A character array containing the Base64 encoded data.

* @param iOff Offset of the first character in <code>in</code> to be processed.

* @param iLen Number of characters to process in <code>in</code>, starting at <code>iOff</code>.

* @return An array containing the decoded data bytes.

* @throws IllegalArgumentException If the input is not valid Base64 encoded data.

*/

public static byte[] decode (char[] in, int iOff, int iLen) {

if (iLen%4 != 0) throw new IllegalArgumentException ("Length of Base64 encoded input string is not a multiple of 4.");

while (iLen > 0 && in[iOff+iLen-1] == '=') iLen--;

int oLen = (iLen*3) / 4;

byte[] out = new byte[oLen];

int ip = iOff;

int iEnd = iOff + iLen;

int op = 0;

while (ip < iEnd) {

int i0 = in[ip++];

int i1 = in[ip++];

int i2 = ip < iEnd ? in[ip++] : 'A';

int i3 = ip < iEnd ? in[ip++] : 'A';

if (i0 > 127 || i1 > 127 || i2 > 127 || i3 > 127)

throw new IllegalArgumentException ("Illegal character in Base64 encoded data.");

int b0 = map2[i0];

int b1 = map2[i1];

int b2 = map2[i2];

int b3 = map2[i3];

if (b0 < 0 || b1 < 0 || b2 < 0 || b3 < 0)

throw new IllegalArgumentException ("Illegal character in Base64 encoded data.");

int o0 = ( b0 <<2) | (b1>>>4);

int o1 = ((b1 & 0xf)<<4) | (b2>>>2);

int o2 = ((b2 & 3)<<6) | b3;

out[op++] = (byte)o0;

if (op<oLen) out[op++] = (byte)o1;

if (op<oLen) out[op++] = (byte)o2; }

return out; }

//Dummy constructor.

private Base64Coder() {}

} // end class Base64Coder

复制代码
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