Question

我们正在尝试创建一个应用，让用户上传图片，在上面写文字，然后用文字保存新图片。

我们当前的实现是使用ImageView来保存图像，然后使用TextViews在其上面进行书写。

整体保存图像的最佳方法是什么？以下是我们当前的代码。

感谢您的帮助！：）

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_generator);

    final EditText topTextInput = (EditText)findViewById(R.id.editTopText);
    final EditText bottomTextInput = (EditText)findViewById(R.id.editBottomText);
    final TextView topTextView = (TextView)findViewById(R.id.topText);
    final TextView bottomTextView = (TextView)findViewById(R.id.bottomText);

    imageView = (ImageView)findViewById(R.id.imageView2);
    Button pickImage = (Button) findViewById(R.id.button2);

    pickImage.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View view) {
            Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
            photoPickerIntent.setType("image/*");
            startActivityForResult(photoPickerIntent, SELECT_PHOTO);
        }
    });

    topTextInput.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
            topTextView.setText(topTextInput.getText() + "");
        }

        @Override
        public void afterTextChanged(Editable editable) {

        }
    });

    bottomTextInput.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
            bottomTextView.setText(bottomTextInput.getText() + "");
        }

        @Override
        public void afterTextChanged(Editable editable) {

        }
    });
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) {
    super.onActivityResult(requestCode, resultCode, imageReturnedIntent);

    switch(requestCode) {
        case SELECT_PHOTO:
            if(resultCode == RESULT_OK){
                try {
                    final Uri imageUri = imageReturnedIntent.getData();
                    final InputStream imageStream = getContentResolver().openInputStream(imageUri);
                    final Bitmap selectedImage = BitmapFactory.decodeStream(imageStream);
                    imageView.setImageBitmap(selectedImage);
                    imageView.setScaleType(ImageView.ScaleType.FIT_XY);
                } catch (FileNotFoundException e) {
                    e.printStackTrace();
                }

            }
    }
}

Answer 1

使用它：

  public Bitmap takeScreenshot() {
        View rootView = getView();
        rootView.setDrawingCacheEnabled(true);
        rootView.buildDrawingCache(true);
        Bitmap b1 = Bitmap.createBitmap(rootView.getDrawingCache(true));
        rootView.setDrawingCacheEnabled(false); // clear drawing cache
        return b1;
    }

并将位图保存到图像：

public void saveBitmap(Bitmap bitmap) {
    if(bitmap==null){
        return;
    }
    File imagePath1 = new File(savePath,"screenshot.jpg");
    FileOutputStream fos;
    try {
        fos = new FileOutputStream(imagePath1);
        bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
        fos.flush();
        fos.close();
    } catch (IOException e) {
        Log.e("GREC", e.getMessage(), e);
    }
}

如何将文本覆盖到Android Studio中的图库中保存图像？

1 个答案: