设置 ImageView 位图什么也不显示答案

【问题标题】：Setting ImageView bitmap shows nothing设置 ImageView 位图什么也不显示
【发布时间】：2015-08-29 11:13:08
【问题描述】：

我正在使用以下代码拍照。令牌图片将被保存，但设置其 URI 或位图不会显示任何内容。我该如何解决这个问题？

注意：以下代码是一些方法和一个被覆盖的方法。

public static void takePicture(Activity activity) {
        Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        if (takePictureIntent.resolveActivity(activity.getPackageManager()) != null) {
            File photoFile = null;
            try {
                photoFile = Images.createTempFile();
            } catch (IOException e) {
                Logger.log(activity, e);
            }
            if (photoFile != null) {
                takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT,
                        Uri.fromFile(photoFile));
                activity.startActivityForResult(takePictureIntent, Constants.RequestCodes.IMAGE_CAPTURE);
            }
        }
    }

public static Uri getUriFromFileName(String fileName) {
        return Uri.fromFile(new File(fileName));
    }

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == Constants.RequestCodes.IMAGE_CAPTURE && resultCode == RESULT_OK) {
            addViewToContainer(Images.getUriFromFileName(Logged.General
                    .getTempTakePhotoFilePath()));
        }
}

private void addViewToContainer(Uri result) {
        ImageView imageView = new ImageView(this);
        Bitmap bitmap = null;
        Uri uri = result == null ? Images.getUriFromFileName(Logged.General
                .getTempTakePhotoFilePath()) : result;
        try {
            bitmap = MediaStore.Images.Media.getBitmap(getApplicationContext()
                    .getContentResolver(), uri);
        } catch (IOException e) {
            Logger.log(this, e);
        }

        imageView.setImageBitmap(bitmap);
        FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(LinearLayout.LayoutParams
                .MATCH_PARENT,
                LinearLayout.LayoutParams.MATCH_PARENT);
        imageView.setLayoutParams(params);
        imageView.setScaleType(ImageView.ScaleType.FIT_XY);
        imageView.setAdjustViewBounds(true);
        mContainerLayout.removeAllViews();
        mContainerLayout.setForeground(null);
        mContainerLayout.addView(imageView);
    }

【问题讨论】：

相机是多少百万像素？如果相机超过 8 MP，那么您的手机可能内存不足，无法将其处理到 ImageView 上。
@WisdmLabs 这正是原因。谢谢。

标签： android bitmap uri android-imageview

【解决方案1】：

你好试试这个.....

private void openCamera() {
    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd_HH_mm_ss");
    String currentTimeStamp = dateFormat.format(new Date());
    f = new File(android.os.Environment.getExternalStorageDirectory(), currentTimeStamp);
    intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f));
    startActivityForResult(intent, 1);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == RESULT_OK) {
        if (requestCode == 1) {
            try {
                String click = f.getAbsolutePath();


            } catch (Exception e) {
                e.printStackTrace();
            }

现在你得到了捕获图像的文件路径

    File imgFile = new File(iv_path);

            if (imgFile.exists()) {

                myBitmap = BitmapFactory.decodeFile(imgFile.getAbsolutePath());
                iv_prpfile.setImageBitmap(myBitmap);
                iv_back.setImageBitmap(myBitmap);
            }

编码愉快 :-)

【讨论】：