单击片段内的按钮时可以显示对话框/弹出窗口吗？答案

【问题标题】：can I show a dialog / popup when clicking a button inside fragment?单击片段内的按钮时可以显示对话框/弹出窗口吗？
【发布时间】：2017-11-02 00:58:52
【问题描述】：

我在显示自定义对话框时遇到问题，我的意思是当我单击时片段中的按钮将弹出/对话框。有人帮忙吗？

【问题讨论】：

发布您的代码以便我们提供帮助。

标签： java android android-fragments button popup

【解决方案1】：

片段

public abstract class BaseFragment extends Fragment {

public Context context;
public Activity activity;

@Override
public void onAttach(Context context) {
    super.onAttach(context);
    this.context = context;
    //or
    this.activity = (Activity) context;
}

}

对话框

public class BaseDialog extends Dialog {

public Context context;
public Activity activity;

public LayoutInflater inflater;
public Window window;
public View decorView;
private final WindowManager.LayoutParams attributes;

public BaseDialog(Context context) {
    super(context);

    activity = (Activity) context;
    this.context = context;

    inflater = LayoutInflater.from(context);
    window = getWindow();
    //no title
    assert window != null;
    window.requestFeature(Window.FEATURE_NO_TITLE);
    //auto dismiss dialog
    setCanceledOnTouchOutside(true);
    //decorView
    decorView = window.getDecorView();
    attributes = getWindow().getAttributes();

}

/**
 * Transparency   0.0f - 1.0f
 *
 * @param f
 */
public void setDimAmount(float f) {
    attributes.dimAmount = f;
    getWindow().setAttributes(attributes);
}

/**
 * @param gravity gravity
 */
public void setGravity(int gravity) {
    window.setGravity(gravity);
}

/**
 * dialog animation
 *
 * @param resId
 */
public void setAnimation(int resId) {
    window.setWindowAnimations(resId);
}

/**
 * custom view
 *
 * @param view
 * @param width
 * @param height
 */
public void setContentView(View view, int width, int height) {
    super.setContentView(view);
    window.setLayout(width, height);
}

}

弹出窗口

public class MyPopupWindow extends PopupWindow {

public MyPopupWindow(View contentView, int width, int height) {
    super(contentView, width, height);
}

@Override
public void showAsDropDown(View anchor) {
    if (Build.VERSION.SDK_INT >= 24) {
        Rect rect = new Rect();
        anchor.getGlobalVisibleRect(rect);
        int h = anchor.getResources().getDisplayMetrics().heightPixels - rect.bottom;
        setHeight(h);
    }
    super.showAsDropDown(anchor);
}

@Override
public void showAsDropDown(View anchor, int xoff, int yoff) {
    if (Build.VERSION.SDK_INT >= 24) {
        Rect rect = new Rect();
        anchor.getGlobalVisibleRect(rect);
        int h = anchor.getResources().getDisplayMetrics().heightPixels - rect.bottom;
        setHeight(h);
    }
    super.showAsDropDown(anchor, xoff, yoff);
}

}

=== 结束 ===

public class MyFragment extends BaseFragment {
public void onClick(View v) {
    showDialog();
    //or
    showPup(v);
}

private void showDialog() {
    new MyDialog(context).show();
    new MyDialog(activity).show();
}

private void showPup(View v) {
    MyPopupWindow popupWindow = new MyPopupWindow(v, WindowManager.LayoutParams.MATCH_PARENT, WindowManager.LayoutParams.MATCH_PARENT);
    popupWindow.setBackgroundDrawable(new BitmapDrawable());
    popupWindow.setOutsideTouchable(true);
    popupWindow.setFocusable(true);
    popupWindow.setTouchable(true);
    popupWindow.setAnimationStyle(R.style.sealFragment_menu_animation);
    popupWindow.showAsDropDown(view);

}

}

【讨论】：