android开发之用户头像上传

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目录(?)[+]

一概述

ok我们开始写一个小的demo完成用户圆形头像的选取在写即将实现的效果之前我们看一下即将要实现的效果图

二实现代码

activity_mainxml
MainActivityjava
ok大功告成最后别忘了在清单文件中添加读写sd可权限不然得不到imagePath
关于上面的隐示intent如果有什么不懂的可以参考
在一个activity中可以多次通过startActivityForResult启动其他Activity得到数据

demo下载地址httpdownloadcsdnnetdetailydxlt9053973

一，概述

本篇博客总结一下自己在开发过程中应用到的一些知识，在本篇博客中带领大家完成用户头像选择或者拍照上传，并对图片进行大小的压缩，和形状的控制，可以将用户选择到的图片裁剪成圆形上传。

ok，我们开始写一个小的demo,完成用户圆形头像的选取，在写即将实现的效果之前我们看一下即将要实现的效果图

二，实现代码

activity_main.xml

<code class="language-xml hljs  has-numbering"><span class="hljs-tag"><<span class="hljs-title">LinearLayout</span> <span class="hljs-attribute">xmlns:android</span>=<span class="hljs-value">"http://schemas.android.com/apk/res/android"</span>
<span class="hljs-attribute">xmlns:tools</span>=<span class="hljs-value">"http://schemas.android.com/tools"</span>
<span class="hljs-attribute">android:layout_width</span>=<span class="hljs-value">"match_parent"</span>
<span class="hljs-attribute">android:layout_height</span>=<span class="hljs-value">"match_parent"</span>
<span class="hljs-attribute">android:gravity</span>=<span class="hljs-value">"center_horizontal"</span>
<span class="hljs-attribute">android:orientation</span>=<span class="hljs-value">"vertical"</span> ></span>

<span class="hljs-tag"><<span class="hljs-title">RelativeLayout
</span>        <span class="hljs-attribute">android:layout_width</span>=<span class="hljs-value">"match_parent"</span>
<span class="hljs-attribute">android:layout_height</span>=<span class="hljs-value">"wrap_content"</span>
<span class="hljs-attribute">android:background</span>=<span class="hljs-value">"#51CA65"</span>
<span class="hljs-attribute">android:padding</span>=<span class="hljs-value">"30dp"</span> ></span>

<span class="hljs-tag"><<span class="hljs-title">ImageView
</span>            <span class="hljs-attribute">android:id</span>=<span class="hljs-value">"@+id/iv_personal_icon"</span>
<span class="hljs-attribute">android:layout_width</span>=<span class="hljs-value">"wrap_content"</span>
<span class="hljs-attribute">android:layout_height</span>=<span class="hljs-value">"wrap_content"</span>
<span class="hljs-attribute">android:layout_centerInParent</span>=<span class="hljs-value">"true"</span>
<span class="hljs-attribute">android:src</span>=<span class="hljs-value">"@drawable/default_personal_image"</span> /></span>
<span class="hljs-tag"></<span class="hljs-title">RelativeLayout</span>></span>

<span class="hljs-tag"><<span class="hljs-title">Button
</span>        <span class="hljs-attribute">android:id</span>=<span class="hljs-value">"@+id/btn_change"</span>
<span class="hljs-attribute">android:layout_marginTop</span>=<span class="hljs-value">"6dp"</span>
<span class="hljs-attribute">android:layout_width</span>=<span class="hljs-value">"wrap_content"</span>
<span class="hljs-attribute">android:layout_height</span>=<span class="hljs-value">"wrap_content"</span>
<span class="hljs-attribute">android:text</span>=<span class="hljs-value">"修改头像"</span> ></span>
<span class="hljs-tag"></<span class="hljs-title">Button</span>></span>

<span class="hljs-tag"></<span class="hljs-title">LinearLayout</span>></span></code><ul class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li><li>11</li><li>12</li><li>13</li><li>14</li><li>15</li><li>16</li><li>17</li><li>18</li><li>19</li><li>20</li><li>21</li><li>22</li><li>23</li><li>24</li><li>25</li><li>26</li><li>27</li><li>28</li><li>29</li><li>30</li></ul><div class="save_code tracking-ad" style="display: none;" data-mod="popu_249"><a target=_blank target="_blank"><img src="http://static.blog.csdn.net/images/save_snippets.png" alt="" /></a></div>

MainActivity.java

<code class="language-java hljs  has-numbering"><span class="hljs-keyword">package</span> com.example.uploadpicdemo;

<span class="hljs-keyword">import</span> java.io.File;

<span class="hljs-keyword">import</span> android.app.Activity;
<span class="hljs-keyword">import</span> android.app.AlertDialog;
<span class="hljs-keyword">import</span> android.content.DialogInterface;
<span class="hljs-keyword">import</span> android.content.Intent;
<span class="hljs-keyword">import</span> android.graphics.Bitmap;
<span class="hljs-keyword">import</span> android.net.Uri;
<span class="hljs-keyword">import</span> android.os.Bundle;
<span class="hljs-keyword">import</span> android.os.Environment;
<span class="hljs-keyword">import</span> android.provider.MediaStore;
<span class="hljs-keyword">import</span> android.util.Log;
<span class="hljs-keyword">import</span> android.view.View;
<span class="hljs-keyword">import</span> android.view.View.OnClickListener;
<span class="hljs-keyword">import</span> android.widget.Button;
<span class="hljs-keyword">import</span> android.widget.ImageView;

<span class="hljs-keyword">public</span> <span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">MainActivity</span> <span class="hljs-keyword">extends</span> <span class="hljs-title">Activity</span> {</span>

<span class="hljs-keyword">protected</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">final</span> <span class="hljs-keyword">int</span> CHOOSE_PICTURE = <span class="hljs-number">0</span>;
<span class="hljs-keyword">protected</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">final</span> <span class="hljs-keyword">int</span> TAKE_PICTURE = <span class="hljs-number">1</span>;
<span class="hljs-keyword">private</span> <span class="hljs-keyword">static</span> <span class="hljs-keyword">final</span> <span class="hljs-keyword">int</span> CROP_SMALL_PICTURE = <span class="hljs-number">2</span>;
<span class="hljs-keyword">protected</span> <span class="hljs-keyword">static</span> Uri tempUri;
<span class="hljs-keyword">private</span> ImageView iv_personal_icon;

<span class="hljs-annotation">@Override</span>
<span class="hljs-keyword">protected</span> <span class="hljs-keyword">void</span> <span class="hljs-title">onCreate</span>(Bundle savedInstanceState) {
<span class="hljs-keyword">super</span>.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button btn_change = (Button) findViewById(R.id.btn_change);
iv_personal_icon = (ImageView) findViewById(R.id.iv_personal_icon);
btn_change.setOnClickListener(<span class="hljs-keyword">new</span> OnClickListener() {

<span class="hljs-annotation">@Override</span>
<span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">onClick</span>(View v) {
showChoosePicDialog();
}
});
}

<span class="hljs-javadoc">/**
* 显示修改头像的对话框
*/</span>
<span class="hljs-keyword">protected</span> <span class="hljs-keyword">void</span> <span class="hljs-title">showChoosePicDialog</span>() {
AlertDialog.Builder builder = <span class="hljs-keyword">new</span> AlertDialog.Builder(<span class="hljs-keyword">this</span>);
builder.setTitle(<span class="hljs-string">"设置头像"</span>);
String[] items = { <span class="hljs-string">"选择本地照片"</span>, <span class="hljs-string">"拍照"</span> };
builder.setNegativeButton(<span class="hljs-string">"取消"</span>, <span class="hljs-keyword">null</span>);
builder.setItems(items, <span class="hljs-keyword">new</span> DialogInterface.OnClickListener() {

<span class="hljs-annotation">@Override</span>
<span class="hljs-keyword">public</span> <span class="hljs-keyword">void</span> <span class="hljs-title">onClick</span>(DialogInterface dialog, <span class="hljs-keyword">int</span> which) {
<span class="hljs-keyword">switch</span> (which) {
<span class="hljs-keyword">case</span> CHOOSE_PICTURE: <span class="hljs-comment">// 选择本地照片</span>
Intent openAlbumIntent = <span class="hljs-keyword">new</span> Intent(
Intent.ACTION_GET_CONTENT);
openAlbumIntent.setType(<span class="hljs-string">"image/*"</span>);
startActivityForResult(openAlbumIntent, CHOOSE_PICTURE);
<span class="hljs-keyword">break</span>;
<span class="hljs-keyword">case</span> TAKE_PICTURE: <span class="hljs-comment">// 拍照</span>
Intent openCameraIntent = <span class="hljs-keyword">new</span> Intent(
MediaStore.ACTION_IMAGE_CAPTURE);
tempUri = Uri.fromFile(<span class="hljs-keyword">new</span> File(Environment
.getExternalStorageDirectory(), <span class="hljs-string">"image.jpg"</span>));
<span class="hljs-comment">// 指定照片保存路径（SD卡），image.jpg为一个临时文件，每次拍照后这个图片都会被替换</span>
openCameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, tempUri);
startActivityForResult(openCameraIntent, TAKE_PICTURE);
<span class="hljs-keyword">break</span>;
}
}
});
builder.create().show();
}

<span class="hljs-annotation">@Override</span>
<span class="hljs-keyword">protected</span> <span class="hljs-keyword">void</span> <span class="hljs-title">onActivityResult</span>(<span class="hljs-keyword">int</span> requestCode, <span class="hljs-keyword">int</span> resultCode, Intent data) {
<span class="hljs-keyword">super</span>.onActivityResult(requestCode, resultCode, data);
<span class="hljs-keyword">if</span> (resultCode == RESULT_OK) { <span class="hljs-comment">// 如果返回码是可以用的</span>
<span class="hljs-keyword">switch</span> (requestCode) {
<span class="hljs-keyword">case</span> TAKE_PICTURE:
startPhotoZoom(tempUri); <span class="hljs-comment">// 开始对图片进行裁剪处理</span>
<span class="hljs-keyword">break</span>;
<span class="hljs-keyword">case</span> CHOOSE_PICTURE:
startPhotoZoom(data.getData()); <span class="hljs-comment">// 开始对图片进行裁剪处理</span>
<span class="hljs-keyword">break</span>;
<span class="hljs-keyword">case</span> CROP_SMALL_PICTURE:
<span class="hljs-keyword">if</span> (data != <span class="hljs-keyword">null</span>) {
setImageToView(data); <span class="hljs-comment">// 让刚才选择裁剪得到的图片显示在界面上</span>
}
<span class="hljs-keyword">break</span>;
}
}
}

<span class="hljs-javadoc">/**
* 裁剪图片方法实现
*
*<span class="hljs-javadoctag"> @param</span> uri
*/</span>
<span class="hljs-keyword">protected</span> <span class="hljs-keyword">void</span> <span class="hljs-title">startPhotoZoom</span>(Uri uri) {
<span class="hljs-keyword">if</span> (uri == <span class="hljs-keyword">null</span>) {
Log.i(<span class="hljs-string">"tag"</span>, <span class="hljs-string">"The uri is not exist."</span>);
}
tempUri = uri;
Intent intent = <span class="hljs-keyword">new</span> Intent(<span class="hljs-string">"com.android.camera.action.CROP"</span>);
intent.setDataAndType(uri, <span class="hljs-string">"image/*"</span>);
<span class="hljs-comment">// 设置裁剪</span>
intent.putExtra(<span class="hljs-string">"crop"</span>, <span class="hljs-string">"true"</span>);
<span class="hljs-comment">// aspectX aspectY 是宽高的比例</span>
intent.putExtra(<span class="hljs-string">"aspectX"</span>, <span class="hljs-number">1</span>);
intent.putExtra(<span class="hljs-string">"aspectY"</span>, <span class="hljs-number">1</span>);
<span class="hljs-comment">// outputX outputY 是裁剪图片宽高</span>
intent.putExtra(<span class="hljs-string">"outputX"</span>, <span class="hljs-number">150</span>);
intent.putExtra(<span class="hljs-string">"outputY"</span>, <span class="hljs-number">150</span>);
intent.putExtra(<span class="hljs-string">"return-data"</span>, <span class="hljs-keyword">true</span>);
startActivityForResult(intent, CROP_SMALL_PICTURE);
}

<span class="hljs-javadoc">/**
* 保存裁剪之后的图片数据
*
*<span class="hljs-javadoctag"> @param</span>
*
*<span class="hljs-javadoctag"> @param</span> picdata
*/</span>
<span class="hljs-keyword">protected</span> <span class="hljs-keyword">void</span> <span class="hljs-title">setImageToView</span>(Intent data) {
Bundle extras = data.getExtras();
<span class="hljs-keyword">if</span> (extras != <span class="hljs-keyword">null</span>) {
Bitmap photo = extras.getParcelable(<span class="hljs-string">"data"</span>);
photo = Utils.toRoundBitmap(photo, tempUri); <span class="hljs-comment">// 这个时候的图片已经被处理成圆形的了</span>
iv_personal_icon.setImageBitmap(photo);
uploadPic(photo);
}
}

<span class="hljs-keyword">private</span> <span class="hljs-keyword">void</span> <span class="hljs-title">uploadPic</span>(Bitmap bitmap) {
<span class="hljs-comment">// 上传至服务器</span>
<span class="hljs-comment">// ... 可以在这里把Bitmap转换成file，然后得到file的url，做文件上传操作</span>
<span class="hljs-comment">// 注意这里得到的图片已经是圆形图片了</span>
<span class="hljs-comment">// bitmap是没有做个圆形处理的，但已经被裁剪了</span>

String imagePath = Utils.savePhoto(bitmap, Environment
.getExternalStorageDirectory().getAbsolutePath(), String
.valueOf(System.currentTimeMillis()));
Log.e(<span class="hljs-string">"imagePath"</span>, imagePath+<span class="hljs-string">""</span>);
<span class="hljs-keyword">if</span>(imagePath != <span class="hljs-keyword">null</span>){
<span class="hljs-comment">// 拿着imagePath上传了</span>
<span class="hljs-comment">// ...</span>
}
}
}</code><ul class="pre-numbering"><li>1</li><li>2</li><li>3</li><li>4</li><li>5</li><li>6</li><li>7</li><li>8</li><li>9</li><li>10</li><li>11</li><li>12</li><li>13</li><li>14</li><li>15</li><li>16</li><li>17</li><li>18</li><li>19</li><li>20</li><li>21</li><li>22</li><li>23</li><li>24</li><li>25</li><li>26</li><li>27</li><li>28</li><li>29</li><li>30</li><li>31</li><li>32</li><li>33</li><li>34</li><li>35</li><li>36</li><li>37</li><li>38</li><li>39</li><li>40</li><li>41</li><li>42</li><li>43</li><li>44</li><li>45</li><li>46</li><li>47</li><li>48</li><li>49</li><li>50</li><li>51</li><li>52</li><li>53</li><li>54</li><li>55</li><li>56</li><li>57</li><li>58</li><li>59</li><li>60</li><li>61</li><li>62</li><li>63</li><li>64</li><li>65</li><li>66</li><li>67</li><li>68</li><li>69</li><li>70</li><li>71</li><li>72</li><li>73</li><li>74</li><li>75</li><li>76</li><li>77</li><li>78</li><li>79</li><li>80</li><li>81</li><li>82</li><li>83</li><li>84</li><li>85</li><li>86</li><li>87</li><li>88</li><li>89</li><li>90</li><li>91</li><li>92</li><li>93</li><li>94</li><li>95</li><li>96</li><li>97</li><li>98</li><li>99</li><li>100</li><li>101</li><li>102</li><li>103</li><li>104</li><li>105</li><li>106</li><li>107</li><li>108</li><li>109</li><li>110</li><li>111</li><li>112</li><li>113</li><li>114</li><li>115</li><li>116</li><li>117</li><li>118</li><li>119</li><li>120</li><li>121</li><li>122</li><li>123</li><li>124</li><li>125</li><li>126</li><li>127</li><li>128</li><li>129</li><li>130</li><li>131</li><li>132</li><li>133</li><li>134</li><li>135</li><li>136</li><li>137</li><li>138</li><li>139</li><li>140</li><li>141</li><li>142</li><li>143</li><li>144</li><li>145</li><li>146</li><li>147</li><li>148</li><li>149</li><li>150</li><li>151</li><li>152</li><li>153</li></ul><div class="save_code tracking-ad" style="display: none;" data-mod="popu_249"><a target=_blank target="_blank"><img src="http://static.blog.csdn.net/images/save_snippets.png" alt="" /></a></div>

ok,大功告成,最后别忘了在清单文件中添加读写sd可权限，不然得不到imagePath

<code class="language-xml hljs  has-numbering"><span class="hljs-tag"><<span class="hljs-title">uses-permission</span> <span class="hljs-attribute">android:name</span>=<span class="hljs-value">"android.permission.WRITE_EXTERNAL_STORAGE"</span> /></span></code><ul class="pre-numbering"><li>1</li></ul><div class="save_code tracking-ad" data-mod="popu_249"><a target=_blank target="_blank"><img src="http://static.blog.csdn.net/images/save_snippets.png" alt="" /></a></div>

关于上面的隐示intent如果有什么不懂的可以参考

http://blog.csdn.net/ydxlt/article/details/47983661

关于

startActivityForResult

启动activity返回结果，在一个activity需要启动另外一个Activity得到数据的时候，我们可以通过意图启动那个Activity返回数据，然后重写Activity的

onActivityResult(int requestCode, int resultCode, Intent data)

方法，在里面根据我们启动的时候传入的请求码（requestCode）判断是启动的哪个Activity返回了，然后在从data参数中取得返回的数据信息，在此之前我们得判断一下启动作为结果返回的Activity的状态，也就是判断一下resultCode是运行的时候被取消了还是运行正常，还是其他情况（RESULT_FIRST_USER），如果resultCode返回RESULT_OK表示用户在启动的Activity中选择了数据，这个时候我们可以从data中去掉相应的信息了，如果resultCode返回RESULT_CANCELED者没必要处理数据了因为用户没在启动的activity中做任何操作就返回了

在一个activity中可以多次通过

startActivityForResult

启动其他Activity得到数据。

demo下载地址：http://download.csdn.net/detail/ydxlt/9053973