如何处理android中弹出窗口内按钮的onclick事件
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how to handle onclick event of button inside popup window in android
提问by henna
In my application, I have a button initially on the screen, and in onclickof the button, a popup window should open. In the popup window, I have an imagebutton, and onclickof this button, I want to start an activity. The popup window opens, but I don't understand how to handle the onclickof the imagebutton inside the popup window.
在我的应用程序中，我最初在屏幕上有一个按钮，在onclick按钮中，应该会打开一个弹出窗口。在弹出窗口中，我有一个图像onclick按钮，在这个按钮中，我想开始一个活动。弹出窗口打开，但我不明白如何处理onclick弹出窗口内的图像按钮。
In main.xml, I have a button, and in popup_example.xml, I have an imagebutton.
在 main.xml 中，我有一个按钮，而在 popup_example.xml 中，我有一个图像按钮。
My Java code is as follows:
我的Java代码如下：
final LayoutInflater inflater = (LayoutInflater)this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
final Button b=(Button)findViewById(R.id.btn);
b.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
PopupWindow pw = new PopupWindow(inflater.inflate(R.layout.popup_example,(ViewGroup)findViewById(R.layout.main)));
pw.showAtLocation(v, Gravity.LEFT,0,0);
pw.update(8,-70,150,270);
//if onclick written here, it gives null pointer exception.
ImageButton img=(ImageButton)findViewById(R.id.home);
img.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
Intent.....
}
});
//if onclick is written here it gives runtime exception.
});
and I have two xml layouts.........
我有两个 xml 布局........
main.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="wrap_content"> <ImageButton android:id="@+id/btn" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/ghj" /> </LinearLayout>popup_example.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:padding="10dip" android:layout_width="fill_parent" android:layout_height="wrap_content" android:background="#8E2323"> <TableLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="5px"> <TableLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="5px" android:background="#000000"> <ImageButton android:id="@+id/home" android:layout_width="wrap_content" android:layout_height="wrap_content" android:focusable="true" android:src="@drawable/vitalss" android:layout_weight="1" android:background="#8E2323"/> </TableLayout> </TableLayout> </LinearLayout>
主文件
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="wrap_content"> <ImageButton android:id="@+id/btn" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/ghj" /> </LinearLayout>popup_example.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:padding="10dip" android:layout_width="fill_parent" android:layout_height="wrap_content" android:background="#8E2323"> <TableLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="5px"> <TableLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="5px" android:background="#000000"> <ImageButton android:id="@+id/home" android:layout_width="wrap_content" android:layout_height="wrap_content" android:focusable="true" android:src="@drawable/vitalss" android:layout_weight="1" android:background="#8E2323"/> </TableLayout> </TableLayout> </LinearLayout>
回答by Francesco Laurita
You have to find the button into the Popup view:
您必须在弹出视图中找到按钮：
View pview = inflater.inflate(R.layout.popup_example,(ViewGroup)findViewById(R.layout.main));
PopupWindow pw = new PopupWindow(pview);
pw.showAtLocation(v, Gravity.LEFT,0,0);
pw.update(8,-70,150,270);
//if onclick written here, it gives null pointer exception.
ImageButton img=(ImageButton)pview.findViewById(R.id.home);
img.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
Intent.....
}
});
回答by Atish Dabholkar
This will not give error in Inflater and work properly:
这不会在 Inflater 中出错并正常工作：
LayoutInflater layoutInflater = getLayoutInflater();
View pview = layoutInflater.inflate(R.layout.popup_example, (ViewGroup)findViewById(R.layout.main));
PopupWindow pw = new PopupWindow(pview);
pw.showAtLocation(v, Gravity.LEFT,0,0);
pw.update(8,-70,150,270);
//if onclick written here, it gives null pointer exception.
ImageButton img=(ImageButton)pview.findViewById(R.id.home);
img.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
Intent.....
}
});
回答by CrazyJ36
In main activity button onClick you can use:
在主活动按钮 onClick 中，您可以使用：
popupWindow.getContentView().findViewById(R.id.buttonInPopup).setOnClickListener(new OnClickListener(...)
回答by Basavaraj Walikar
best solution :) Pass onCclickMethod from xml
最佳解决方案:) 从 xml 传递 onCclickMethod
<ImageButton
android:id="@+id/save_btn"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
**android:onClick="onClick"**
android:contentDescription="@string/save"
android:src="@drawable/save" />
it wroked from me..
它来自我..
