Question

我面临一些关于弹出窗口的if else语句的问题。我想设置当我点击不同的图像按钮然后会弹出不同的图像，但现在我编码和测试弹出后没有功能。 ..

这是我的java代码

public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View view = inflater.inflate(R.layout.macarons, container, false);
    ImageButton ma1 = (ImageButton) view.findViewById(R.id.ma1);
    ImageButton ma2 = (ImageButton) view.findViewById(R.id.ma2);
    Display display = getActivity().getWindowManager().getDefaultDisplay();
    Point size = new Point();
    display.getSize(size);
    final int width = size.x;
    final int height = size.y;

    positionPopup = (RelativeLayout) view.findViewById(R.id.popup_position);
    if (view.equals(ma1)) {
        ma1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                LayoutInflater inflater = (LayoutInflater) getActivity().getSystemService(LAYOUT_INFLATER_SERVICE);
                View customView = inflater.inflate(R.layout.popup, null);

                ImageView img1 = (ImageView) customView.findViewById(R.id.popup_img);
                img1.setImageResource(R.drawable.ma_bananacho_popup);
                myPopUp = new PopupWindow(customView);
                myPopUp.setWidth(width - 50);
                myPopUp.setHeight(height - 50);
                myPopUp.setOutsideTouchable(true);
                myPopUp.setFocusable(true);
                myPopUp.showAtLocation(positionPopup, Gravity.CENTER, 0, 0);
            }
        });
    }
    else if (view.equals(ma2)) {
        ma2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                LayoutInflater inflater = (LayoutInflater) getActivity().getSystemService(LAYOUT_INFLATER_SERVICE);
                View customView = inflater.inflate(R.layout.popup, null);

                ImageView img2 = (ImageView) customView.findViewById(R.id.popup_img);
                img2.setImageResource(R.drawable.chocolate);
                myPopUp = new PopupWindow(customView);
                myPopUp.setWidth(width - 50);
                myPopUp.setHeight(height - 50);
                myPopUp.setOutsideTouchable(true);
                myPopUp.setFocusable(true);
                myPopUp.showAtLocation(positionPopup, Gravity.CENTER, 0, 0);
            }
        });
    }
    return view;
}

这是我的弹出窗口xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical">


<ImageView
    android:id="@+id/popup_img"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_marginBottom="20dp"
    android:layout_marginTop="10dp"
    android:layout_marginLeft="20dp"
    android:layout_marginRight="20dp"/>
</RelativeLayout>

这是片段xml

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:tools="http://schemas.android.com/tools"
android:layout_alignParentTop="true"
tools:ignore="ContentDescription">
<RelativeLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:background="#FFFFFF"
    android:id="@+id/popup_position">
<GridLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:columnCount="2"
    android:layout_marginTop="50dp"
    android:layout_marginBottom="50dp">

    <ImageButton
        android:layout_width="0dp"
        android:layout_height="190dp"
        android:layout_columnWeight="1"
        android:background="@drawable/ma_bananacho"
        android:gravity="center"
        android:layout_gravity="fill_horizontal"
        android:id="@+id/ma1"/>

    <ImageButton
        android:id="@+id/ma2"
        android:layout_width="0dp"
        android:layout_height="190dp"
        android:layout_columnWeight="1"
        android:layout_gravity="fill_horizontal"
        android:background="@drawable/ma_blueberry"
        android:gravity="center" />

    <ImageButton
        android:layout_width="0dp"
        android:layout_height="190dp"
        android:layout_columnWeight="1"
        android:background="@drawable/ma_chomint"
        android:gravity="center"
        android:layout_gravity="fill_horizontal" />

    <ImageButton
        android:layout_width="0dp"
        android:layout_height="190dp"
        android:layout_columnWeight="1"
        android:background="@drawable/ma_coffee"
        android:gravity="center"
        android:layout_gravity="fill_horizontal" />

    <ImageButton
        android:layout_width="0dp"
        android:layout_height="190dp"
        android:layout_columnWeight="1"
        android:background="@drawable/ma_greentea"
        android:gravity="center"
        android:layout_gravity="fill_horizontal" />

    <ImageButton
        android:layout_width="0dp"
        android:layout_height="190dp"
        android:layout_columnWeight="1"
        android:background="@drawable/ma_strawcho"
        android:gravity="center"
        android:layout_gravity="fill_horizontal" />

</GridLayout>
</RelativeLayout>
</ScrollView>

Answer 1

Session

创建一个常用的clickListener，将其设置为2个图像视图View.OnClickListener clickListener = new View.OnClickListener() { @Override public void onClick(View v) { LayoutInflater inflater = (LayoutInflater) getActivity().getSystemService(LAYOUT_INFLATER_SERVICE); View customView = inflater.inflate(R.layout.popup, null); ImageView img1 = (ImageView) customView.findViewById(R.id.popup_img); if (v.getId() == R.id.ma1) { img1.setImageResource(R.drawable.ma_bananacho_popup); } else if (v.getId() == R.id.ma2) { img1.setImageResource(R.drawable.chocolate); } myPopUp = new PopupWindow(customView); myPopUp.setWidth(width - 50); myPopUp.setHeight(height - 50); myPopUp.setOutsideTouchable(true); myPopUp.setFocusable(true); myPopUp.showAtLocation(positionPopup, Gravity.CENTER, 0, 0); } }; ma1.setOnClickListener(clickListener); ma2.setOnClickListener(clickListener);
通过比较ma1, ma2如下

Answer 2

在java中任何overide方法都不会在内部工作如果条件因为overide方法应该直接在class里面。因此，当你使用任何一种覆盖方法时，你必须在课堂下或在课堂上直接进行。你是匿名的吗？因此你必须将if else置于onclick方法之外。对于exa。

      View.OnClickListener clickListener = new View.OnClickListener() {
            @Override
            public void onClick(View v) {

            if(condition){
              //for if condition is true

     }else{
      //for if condition is false

                 }
            }
        };

如果在android中单击不同的图像按钮时弹出的是else语句

2 个答案: