Android 如何将 Viewpager 与 OnTouchListener 一起使用

Question

我是一名编码初学者，对于我对问题的错误解释深表歉意。

在我的 MainActivity 中，我有一个全屏 Viewpager，它会在我每次向左或向右滑动时更改其内容（xml-文件）。这些视图集合在枚举中定义，我还为此使用了 CustomPagerAdapter。这工作正常，但是当我在我的 MainActivity 中实现 onTouchListener 时，"swiping" 不再工作。

有谁知道，如何解决？

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Main = (View) findViewById(R.id.MainActivity);
    viewPager = (ViewPager) findViewById(R.id.colorgroup);
    viewPager.setAdapter(new CustomPagerAdapter(this));
    View.OnTouchListener handleTouch = new View.OnTouchListener() {
    @Override
     public boolean onTouch(View v, MotionEvent event) {
            int x = (int) event.getX();
            int y = (int) event.getY();
            viewPager.setDrawingCacheEnabled(true);
            viewPager.buildDrawingCache();
            Bitmap bitmap = viewPager.getDrawingCache();
            int pixel = bitmap.getPixel(x, y);
            String hexColor = String.format( "#%02x%02x%02x", r, g, b );
            return true;
        }
    };
    viewPager.setOnTouchListener(handleTouch);
}

public class CustomPagerAdapter 扩展了 PagerAdapter {

private Context mContext;

public CustomPagerAdapter(Context context) {
    mContext = context;
}

@Override
public Object instantiateItem(ViewGroup collection, int position) {
    CustomPagerEnum customPagerEnum = CustomPagerEnum.values()[position];
    LayoutInflater inflater = LayoutInflater.from(mContext);
    ViewGroup layout = (ViewGroup) inflater.inflate(customPagerEnum.getLayoutResId(), collection, false);
    collection.addView(layout);
    return layout;
}

@Override
public void destroyItem(ViewGroup collection, int position, Object view) {
    collection.removeView((View) view);
}

@Override
public int getCount() {
    return CustomPagerEnum.values().length;
}

@Override
public boolean isViewFromObject(View view, Object object) {
    return view == object;
}

@Override
public CharSequence getPageTitle(int position) {
    CustomPagerEnum customPagerEnum = CustomPagerEnum.values()[position];
    return mContext.getString(customPagerEnum.getTitleResId());
}

}

public 枚举 CustomPagerEnum {

YELLOW(R.string.YELLOW, R.layout.view_yellow),
PUCE(R.string.PUCE, R.layout.view_puce),
BROWN(R.string.BROWN, R.layout.view_brown),
GREEN(R.string.GREEN, R.layout.view_green),
CYAN(R.string.CYAN, R.layout.view_cyan),
BLUE(R.string.BLUE, R.layout.view_blue),
RED(R.string.RED, R.layout.view_red),
PINK(R.string.PINK, R.layout.view_pink),
PURPLE(R.string.PURPLE, R.layout.view_purple),
SLATE(R.string.SLATE, R.layout.view_slate),
GREY(R.string.GREY, R.layout.view_grey),
DARK(R.string.DARK, R.layout.view_dark);



    private int mTitleResId;
    private int mLayoutResId;

    CustomPagerEnum(int titleResId, int layoutResId) {
        mTitleResId = titleResId;
        mLayoutResId = layoutResId;
    }

    public int getTitleResId() {
        return mTitleResId;
    }

    public int getLayoutResId() {
        return mLayoutResId;
    }

}

Answer 1

你总是returntrue来自onTouch()方法。这表示您的处理程序已使用触摸事件，因此不会进一步处理该事件。这导致滑动无法正常工作。 Return false 代替。

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