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android开发实现换头像功能教程

2018年03月11日  | 移动技术网IT编程  | 我要评论

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android开发实现换头像功能教程。因为想让图片圆形显示 所以用了 SimpleDrawView 也可以换成ImageView

具体代码如下:

private SimpleDraweeView mSdvs;
private Bitmap head;// 头像Bitmap
private static String path = "/sdcard/myHead/";// sd路径
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.loginfragment, null);
    initView(view);
    return view;
}

private void initView(View view) {
    mLogin = (TextView) view.findViewById(R.id.login);
    mLogin.setOnClickListener(this);
    mSdvs = (SimpleDraweeView) view.findViewById(R.id.sdvs);
    mSdvs.setOnClickListener(this);
    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
        mSdvs.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
         *
         */
    }
}

@Override
public void onClick(View view) {
    switch (view.getId()) {
        case R.id.login:
            //跳转到登陆页面
            Intent intent = new Intent(getActivity(), MainActivity.class);
            getActivity().startActivity(intent);
            break;
        case R.id.sdvs:
            showTypeDialog();//更换头像
            break;
    }
}
private void showTypeDialog() {
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
    final AlertDialog dialog = builder.create();
    View view = View.inflate(getActivity(), 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 View.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 View.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
public 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
                    mSdvs.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();
        }
    }
}

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