如何在从自定义相机拍摄和保存后将图片显示为 activity

Question

在我的应用程序中，我正在拍照并在压缩后成功将其保存在图库中。现在我想将它显示到其他 activity，以便用户至少可以共享或查看它。那么我该怎么做。

以下是我保存图片的代码，保存后它显示广告，在 adClosed 事件中我想将拍摄的照片发送给其他人 activity，我该怎么做。我的代码就是这样..

 File storagePath = new File(Environment.getExternalStorageDirectory().getAbsolutePath()+ File.separator + "MyAnimals");
        storagePath.mkdirs();
        String finalName = Long.toString(System.currentTimeMillis());

    //this snippet is saving image And I am showing ad after saving picture
  File myImage = new File(storagePath, finalName + ".jpg");

    String photoPath = Environment.getExternalStorageDirectory().getAbsolutePath() +"/" + finalName + ".jpg";

    try {
        FileOutputStream fos = new FileOutputStream(myImage);
        newImage.compress(Bitmap.CompressFormat.JPEG, 100, fos);

        fos.close();
        //refreshing gallery
        Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
        mediaScanIntent.setData(Uri.fromFile(myImage));
        sendBroadcast(mediaScanIntent);
    } catch (IOException e) {
        Toast.makeText(this, "Pic not saved", Toast.LENGTH_SHORT).show();
        return;
    }
    Toast.makeText(this, "Pic saved in: " + photoPath, Toast.LENGTH_SHORT).show();

    displayInterstitial();


         interstitial.setAdListener(new AdListener() {
        @Override
        public void onAdClosed() {
            Log.v("Add time");

       Intent intent = new Intent(CameraActivity.this,ShowCapturedImage.class);

       //Now How to send the saved picture to the image view of other activity?
            startActivity(intent);

            super.onAdClosed();
        }
    });

Answer 1

您可以通过向 Activity 添加一个 ImageView 来实现。

一个简单的 ImageView 应该是这样的：

<ImageView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/imageView" />

然后将其捕获到 Activity class

ImageView imageView = (ImageView) this.findViewById(R.id.imageView);

现在是有趣的部分。我们将使用图像 URI 捕获您的图像并将其解析为位图。

Bitmap bitmap = BitmapFactory.decodeFile(fileUri.getPath()); //Here goes your image path
imageView.setImageBitmap(Bitmap.createScaledBitmap(bitmap,imageView.getWidth(), imageView.getHeight(), false)); //I scale the bitmap so it show properly. If the image is too big, it wont show on the ImageView

这应该可以解决问题，告诉我它是否有效！

Answer 2

1) 将拍摄的图像路径放入 intent

2) 在其他 activity 中获取路径并在 imageview 中设置它

public static final int REQUEST_CODE_FROM_CAMERA = 112;
private Uri fileUri;
String image_path = "";

//从下方函数抓图

 private void fromCamera() {
            Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

            fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);
            Log.d("FROM CAMERA CLICKED file uri", fileUri.getPath());
            intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);

            // start the image capture Intent
            startActivityForResult(intent, REQUEST_CODE_FROM_CAMERA);
        }

//在Activity结果存储图片路径

@Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == REQUEST_CODE_FROM_CAMERA
                && resultCode == Activity.RESULT_OK) {
            try {


                image_path = fileUri.getPath();


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

        }
}

点击任意按钮

Intent iSecond=new Intent(FirstActivity.this,SecondActivity.class);
iSecond.putExtra("image_path",image_path);
startActivity(iSecond);

秒ActivityonCreate()

 Bundle extras = intent.getExtras();
    if(extras != null)
    String image_path = extras.getString("image_path");

从这个图片路径，可以获取图片并设置为imageview

ImageView iv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        iv = (ImageView) findViewById(R.id.imageView1);

        File imgFile = new File("/storage/emulated/0/1426484497.png");

        if (imgFile.exists()) {

            Bitmap myBitmap = BitmapFactory.decodeFile(imgFile
                    .getAbsolutePath());

            iv.setImageBitmap(myBitmap);

        }

    }

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