通过照相机拍照或者图库选择图片上传给服务器作为头像

来源：互联网发布：caffe 测试集验证集编辑：程序博客网时间：2024/05/21 06:58

通过照相机拍照或者图库选择图片上传给服务器作为头像

一个自定义的dialog

public class SettingAvatarDialog extends Dialog implements View.OnClickListener{    public static final int CAMERA = 33;    public static final int PICTRUE_LIBS = 22;    public static final int CUTTING = 11;    public static final String IMAGE_UNSPECIFIED = "image/*";    private View view;    private TextView tv_camera;    private TextView tv_picture_libs;    private TextView tv_cancel;    private Activity mActivity;    /**     * @param context     * @param cancelable     * @param cancelListener     */    public SettingAvatarDialog(Context context, boolean cancelable,                               OnCancelListener cancelListener) {        super(context, cancelable, cancelListener);    }    /**     * @param context     * @param theme     */    public SettingAvatarDialog(Context context, int theme) {        super(context, theme);    }    /**     * @param context     */    public SettingAvatarDialog(Context context) {        super(context);        this.mActivity = (Activity) context;        requestWindowFeature(Window.FEATURE_NO_TITLE);        view = View.inflate(context,R.layout.activity_camera,null);        this.setContentView(view);        initView();        initOnclickListener();    }    /**     * 初始化位置,让其位于屏幕的下方     */    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        getWindow().setGravity(Gravity.BOTTOM);        Display display = getWindow().getWindowManager().getDefaultDisplay();        int width = display.getWidth();        WindowManager.LayoutParams attributes = getWindow().getAttributes();        attributes.width = width;        getWindow().setAttributes(attributes);        this.setCancelable(false);    }    /**     * 初始化点击事件     */    private void initOnclickListener() {        tv_camera.setOnClickListener(this);        tv_picture_libs.setOnClickListener(this);        tv_cancel.setOnClickListener(this);    }    /**     * 初始化子控件     */    private void initView() {        tv_camera = (TextView) view.findViewById(R.id.tv_camera);        tv_picture_libs = (TextView) view.findViewById(R.id.tv_picture_libs);        tv_cancel = (TextView) view.findViewById(R.id.tv_cancel);    }    /**     * 处理点击事件     *     * @param v     */    @Override    public void onClick(View v) {        Intent intent;        switch (v.getId()) {            case R.id.tv_camera:                // 拍照上传                String state = Environment.getExternalStorageState();                if (state.equals(Environment.MEDIA_MOUNTED)) {                    Intent i = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);// 相机捕捉图片的意图                    Uri picFileFullName = Uri.fromFile(new File(Environment.getExternalStorageDirectory(), "temp.jpg"));                    i.putExtra(MediaStore.EXTRA_OUTPUT, picFileFullName);// 指定系统相机拍照保存在imageFileUri所指的位置                    mActivity.startActivityForResult(i, CAMERA);                } else {                    ToastUtils.show(MyApplication.getCtx(), "请插入内存卡");                }                break;            case R.id.tv_picture_libs:                // 图库上传                intent = new Intent(Intent.ACTION_PICK, null);                // intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,                // IMAGE_UNSPECIFIED);                intent.setType(IMAGE_UNSPECIFIED);                mActivity.startActivityForResult(intent, PICTRUE_LIBS);                break;            case R.id.tv_cancel:                // 取消                this.dismiss();                break;        }    }    /**     * 对头像进行裁剪     *     * @param uri     */    public void startPhotoZoom(Uri uri) {        Intent intent = new Intent("com.android.camera.action.CROP");        // //裁剪图片意图        intent.setDataAndType(uri, "image/*");        intent.putExtra("crop", "true");        // 裁剪框的比例，1：1        intent.putExtra("aspectX", 1);        intent.putExtra("aspectY", 1);        // 裁剪后输出图片的尺寸大小        intent.putExtra("outputX", 240);        intent.putExtra("outputY", 240);        // 图片格式        intent.putExtra("outputFormat", "JPEG");        intent.putExtra("noFaceDetection", true);        intent.putExtra("return-data", true);        mActivity.startActivityForResult(intent, CUTTING);        this.dismiss();    }}

调用时的代码(当点击头像,准备设置头像之时)

SettingAvatarDialog dialog = new SettingAvatarDialog(this);dialog.show();

另外重写

protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        ToastUtils.show(this, "homeactivity返回了");        switch (requestCode) {            case 33:                //拍照返回的结果                if (resultCode == this.RESULT_OK) {                    File file = new File(Environment.getExternalStorageDirectory(), "temp.jpg");                    if (file != null) {                        dialog.startPhotoZoom(Uri.fromFile(file));                    }                }else{                    dialog.dismiss();                }                break;            case SettingAvatarDialog.PICTRUE_LIBS:                //拍照返回的结果                if (resultCode == this.RESULT_OK) {                    Uri uri = data.getData();                    if (uri != null) {                        dialog.startPhotoZoom(uri);                    } else {                        dialog.dismiss();                        ToastUtils.show(this, "无法加载图片");                    }                }else{                    dialog.dismiss();                }                break;            case SettingAvatarDialog.CUTTING:                //拍照返回的结果                if (resultCode == this.RESULT_OK) {                    Bundle extras = data.getExtras();                    if (extras != null) {                        final Bitmap photo = extras.getParcelable("data");                        ByteArrayOutputStream stream = new ByteArrayOutputStream();                        photo.compress(Bitmap.CompressFormat.JPEG, 75, stream);                        imageView.setImageBitmap(photo);                    }else{                        dialog.dismiss();                    }                }                break;            default:                break;        }

值得注意的地方

上述代码是在Activity中使用的过程,如果在Fragment中使用时

在我们重写的onActivityResult()方法中this.RESULTOK改为mActivity.RESULTOK
Fragment和Activity在通过startActivityForResult()方法打开acitivyt时,他俩都可以重写onAcitivityResult(),但是在上述的代码中如果将onAcitivityResult()写到framgnet里面,onAcitivityResult()将不会被正确调用,所以使用fragment的同学们需要找到fragment依附的activity,在其中重写onAcitivityResult()方法

一般的,常用的方法(将Bitmap对象转为由Base64编码的字符串)

Bitmap photo = extras.getParcelable("data");ByteArrayOutputStream stream = new ByteArrayOutputStream();photo.compress(Bitmap.CompressFormat.JPEG, 75, stream);String base64Photo = Base64.encodeToString(stream.toByteArray(), Base64.DEFAULT);

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