如何在Android中捕获图像以及如何从图库中获取图像

Question

我正在集成一个有关如何捕获图像以及如何从图库中获取图像的代码。这是我的源代码。 它对个人来说可以正常工作，但是从图库上传图像时却没有显示imageview。 请帮我

private static int RESULT_LOAD_IMAGE = 1;
private static final int CAMERA_REQUEST = 1888; 
private ImageView imageView,imageView1;
private static final int SELECT_PICTURE = 1;
String  selectedPath;

private String selectedImagePath;
Uri selectedImageUri;
//ADDED
private String filemanagerstring;

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



    this.imageView = (ImageView)this.findViewById(R.id.imageView1);
    Button photoButton = (Button) this.findViewById(R.id.button1);
    photoButton.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
            startActivityForResult(cameraIntent, CAMERA_REQUEST); 
        }
    });
}
ShutterCallback shutterCallback = new ShutterCallback() {
    public void onShutter() {
        //Log.d(TAG, "onShutter'd");
    }
};


protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
    if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) {  
        Bitmap photo = (Bitmap) data.getExtras().get("data"); 
        imageView.setImageBitmap(photo);
    } 



    Button buttonLoadImage = (Button) findViewById(R.id.buttonLoadPicture);
    buttonLoadImage.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {

            Intent i = new Intent(
                    Intent.ACTION_PICK,
                    android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);

            startActivityForResult(i, RESULT_LOAD_IMAGE);
        }
    });
}


protected void onActivityResult1(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) {
        Uri selectedImage = data.getData();
        String[] filePathColumn = { MediaStore.Images.Media.DATA };

        Cursor cursor = getContentResolver().query(selectedImage,
                filePathColumn, null, null, null);
        cursor.moveToFirst();

        int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
        String picturePath = cursor.getString(columnIndex);
        cursor.close();

        ImageView imageView = (ImageView) findViewById(R.id.imgView);
        imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));

    }


}

}

Answer 1

在类声明的顶部声明全局变量：

 private static int RESULT_LOAD_IMAGE = 1;
 private static final int PICK_FROM_GALLERY = 2;
 Bitmap thumbnail = null; 

像这样调用意图：（您的功能）

  public void YourFunction(){
       Intent in = new   Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                      startActivityForResult(in, RESULT_LOAD_IMAGE);

   }

像这样处理结果：在类的任何位置的onCreate之外声明此内容。

 protected void onActivityResult(int requestCode, int resultCode, Intent data) {  

    super.onActivityResult(requestCode, resultCode, data);     

     if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data){

         Uri selectedImage = data.getData();
            String[] filePathColumn = { MediaStore.Images.Media.DATA };
            Cursor cursor = getContentResolver().query(selectedImage,filePathColumn, null, null, null);
            cursor.moveToFirst();
            int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
            String picturePath = cursor.getString(columnIndex);
            cursor.close();
            thumbnail = (BitmapFactory.decodeFile(picturePath));

缩略图是您的图片，快去玩吧！