Resize imageview on onDoubleTapEvent

问题

I want to resize an ImageView on doubleTapEvent. A code example will be really helpful.

回答1:

XML:

<?xml version="1.0" encoding="utf-8"?>
<ImageView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/myImage"
android:src="@drawable/myPicture"
android:layout_width="64sp"
android:layout_height="64sp"
/>

Java:

public class MyActivity extends Activity implements OnDoubleTapListener{
    private ImageView img;

    private static int NEW_WIDTH = 100;
    private static int NEW_HEIGHT = 100;

    @Override
    public void onCreate(Bundle savedInstanceState){
        setContentView(R.layout.myLayout);
        this.img = findViewById(R.id.myImage);
        img.setOnDoubleTapListener(this);
    }

    public boolean onDoubleTap(MotionEvent e){
        this.img.setLayoutParams(new LayoutParams(NEW_WIDTH, NEW_HEIGHT));
    }

Something like this...

回答2:

Above code is not working give error on img.setOnDoubleTapListener(this) line ... give such type of error "The method setOnDoubleTapListener(this) is the undefined for the type ImageView".

来源：https://stackoverflow.com/questions/4204373/resize-imageview-on-ondoubletapevent