从ImageView对象获取原始图像到位图android

Question

我的应用程序中有一个椅子的ImageView对象。我有一个库，我想使用，并需要图像是BGR888图像格式。

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public class MainActivity extends AppCompatActivity {

    TextView textView;
    ImageView imageView;
    int finalHeight, finalWidth;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        imageView = findViewById(R.id.imageView);
        textView = findViewById(R.id.textView);
        getWidthHeight();

    }

    void getWidthHeight(){
        ViewTreeObserver vto = imageView.getViewTreeObserver();
        vto.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
            public boolean onPreDraw() {
                // Remove after the first run so it doesn't fire forever
                imageView.getViewTreeObserver().removeOnPreDrawListener(this);
                finalHeight = imageView.getMeasuredHeight();
                finalWidth = imageView.getMeasuredWidth();
                textView.setText("Height: " + finalHeight + " Width: " + finalWidth);
                Log.d("height of img", String.valueOf(finalHeight));
                Log.d("width of img", String.valueOf(finalWidth));

                return true;
            }
        });
    }
}

Answer 1

如果要将Imageview图像转换为位图，请遵循下面的代码。

private Bitmap convertToBitmap(){
    BitmapDrawable drawable = (BitmapDrawable) imageView.getDrawable();
    Bitmap bitmap = drawable.getBitmap();
    return bitmap;
}

ConvertToBitmap（）方法返回位图文件。调用它可以获取Imageview位图。