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5分钟实现Android中更换头像功能

5分钟实现Android中更换头像功能

写在前面:
更换头像这个功能在用户界面几乎是100%出现的。通过拍摄照片或者调用图库中的图片,并且进行剪裁,来进行头像的设置。
功能相关截图如下:

                                               

下面我们直接看看完整代码吧:

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public class UserActivity extends BaseActivity implements OnClickListener {
         private ImageView iv_photo;
         private Bitmap head;// 头像Bitmap
         private static String path = "/sdcard/myHead/";// sd路径
         @Override
         protected void onCreate(Bundle savedInstanceState) {
                 super.onCreate(savedInstanceState);
                 initView();
                 initListener();
         }
         private void initView() {
                 setContentView(R.layout.activity_user);
                 iv_photo = (ImageView) findViewById(R.id.iv_photo);
                 Bitmap bt = BitmapFactory.decodeFile(path + "head.jpg");// 从SD卡中找头像,转换成Bitmap
                 if (bt != null) {
                          @SuppressWarnings("deprecation")
                          Drawable drawable = new BitmapDrawable(bt);// 转换成drawable
                          iv_photo.setImageDrawable(drawable);
                 } else {
                          /**
                           * 如果SD里面没有则需要从服务器取头像,取回来的头像再保存在SD中
                           *
                           */
                 }
         }
         private void initListener() {
                 iv_photo.setOnClickListener(this);
         }
         
         @Override
         public void onClick(View v) {
                 switch (v.getId()) {
                 case R.id.iv_photo:// 更换头像
                          showTypeDialog();
                          break;
                 }
         }
         private void showTypeDialog() {
                 AlertDialog.Builder builder = new AlertDialog.Builder(this);
                 final AlertDialog dialog = builder.create();
                 View view = View.inflate(this, R.layout.dialog_select_photo, null);
                 TextView tv_select_gallery = (TextView) view.findViewById(R.id.tv_select_gallery);
                 TextView tv_select_camera = (TextView) view.findViewById(R.id.tv_select_camera);
                 tv_select_gallery.setOnClickListener(new OnClickListener() {// 在相册中选取
                          @Override
                          public void onClick(View v) {
                                   Intent intent1 = new Intent(Intent.ACTION_PICK, null);
                                   intent1.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");
                                   startActivityForResult(intent1, 1);
                                   dialog.dismiss();
                          }
                 });
                 tv_select_camera.setOnClickListener(new OnClickListener() {// 调用照相机
                          @Override
                          public void onClick(View v) {
                                   Intent intent2 = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                                   intent2.putExtra(MediaStore.EXTRA_OUTPUT,
                                                    Uri.fromFile(new File(Environment.getExternalStorageDirectory(), "head.jpg")));
                                   startActivityForResult(intent2, 2);// 采用ForResult打开
                                   dialog.dismiss();
                          }
                 });
                 dialog.setView(view);
                 dialog.show();
         }
         @Override
         protected void onActivityResult(int requestCode, int resultCode, Intent data) {
                 switch (requestCode) {
                 case 1:
                          if (resultCode == RESULT_OK) {
                                   cropPhoto(data.getData());// 裁剪图片
                          }
                          break;
                 case 2:
                          if (resultCode == RESULT_OK) {
                                   File temp = new File(Environment.getExternalStorageDirectory() + "/head.jpg");
                                   cropPhoto(Uri.fromFile(temp));// 裁剪图片
                          }
                          break;
                 case 3:
                          if (data != null) {
                                   Bundle extras = data.getExtras();
                                   head = extras.getParcelable("data");
                                   if (head != null) {
                                            /**
                                             * 上传服务器代码
                                             */
                                            setPicToView(head);// 保存在SD卡中
                                            iv_photo.setImageBitmap(head);// 用ImageView显示出来
                                   }
                          }
                          break;
                 default:
                          break;
                 }
                 super.onActivityResult(requestCode, resultCode, data);
         }
         /**
          * 调用系统的裁剪功能
          *
          * @param uri
          */
         public void cropPhoto(Uri uri) {
                 Intent intent = new Intent("com.android.camera.action.CROP");
                 intent.setDataAndType(uri, "image/*");
                 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);
         }
         private void setPicToView(Bitmap mBitmap) {
                 String sdStatus = Environment.getExternalStorageState();
                 if (!sdStatus.equals(Environment.MEDIA_MOUNTED)) { // 检测sd是否可用
                          return;
                 }
                 FileOutputStream b = null;
                 File file = new File(path);
                 file.mkdirs();// 创建文件夹
                 String fileName = path + "head.jpg";// 图片名字
                 try {
                          b = new FileOutputStream(fileName);
                          mBitmap.compress(Bitmap.CompressFormat.JPEG, 100, b);// 把数据写入文件
                 } catch (FileNotFoundException e) {
                          e.printStackTrace();
                 } finally {
                          try {
                                   // 关闭流
                                   b.flush();
                                   b.close();
                          } catch (IOException e) {
                                   e.printStackTrace();
                          }
                 }
         }
}

再添加以下权限

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<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
<uses-permission android:name="android.permission.INTERNET" />

Dialog的xml文件如下:

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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    <TextView
        android:id="@+id/tv_select_gallery"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center_horizontal"
        android:padding="20dp"
        android:text="从图库中选取"
        android:textColor="#000"
        android:textSize="20sp" />
    <View
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:background="#000" />
    <TextView
        android:id="@+id/tv_select_camera"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center_horizontal"
        android:padding="20dp"
        android:text="拍摄照片"
        android:textColor="#000"
        android:textSize="20sp" />
</LinearLayout>

代码的注释还算全面,仔细阅读一定能看懂,大家可以试试这个demo~这样一个更换头像的功能就实现了。

原文链接:http://www.apkbus.com/blog-705730-62065.html

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