用同样的方法在整个应用程序的Android所有选项菜单 [英] Use same method for all option menu in whole Application Android
问题描述
我有10个至12个活动
,所有活动
的帮助菜单
为选项菜单
。
我有以下code创建,并显示在其中单击帮助成功。
I have 10 to 12 Activity
, All Activity
has Help Menu
as an Option Menu
.
I am succeed with following code to create it and showing help on click of them.
Intent intent = new Intent();
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setAction(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(new File(cacheDir, "HELP.pdf")),"application/pdf");
context.startActivity(intent);
但我想为了减少这种code的所有活动,并为我创建一个类和做一个方法,但我仍希望减少code。
But I want to Reduce this code for all Activity, and for that i have created one class and make one method but still i want to reduce code.
我已搜查,发现的onClick
属性可在 OptionMenu
,但我没有得到如何使用吧。
I have searched and found that onClick
attribute is available in OptionMenu
but I didn't get how to use it.
请帮助..
推荐答案
我创建了以下班中openFile:
I have created following Class for openFile:
public class OpenHelpFile {
File cacheDir;
Context context;
/* Constructor */
public OpenHelpFile(Context context) {
this.context = context;
if (android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED))
cacheDir = new File(android.os.Environment.getExternalStorageDirectory(), "OOPS");
else
cacheDir = context.getCacheDir();
if (!cacheDir.exists())
cacheDir.mkdirs();
try {
File helpFile = new File(cacheDir, "OOPS.pdf");
if (!helpFile.exists()) {
InputStream in = context.getAssets().open("OOPS.pdf");
OutputStream out = new FileOutputStream(helpFile);
byte[] buf = new byte[1024];
int len;
while ((len = in.read(buf)) > 0) {
out.write(buf, 0, len);
}
in.close();
out.close();
Log.d(TAG, "File Copied...");
}
Log.d(TAG, "File exist...");
} catch (FileNotFoundException ex) {
Log.d(TAG, ex.getMessage() + " in the specified directory.");
System.exit(0);
} catch (IOException e) {
Log.d(TAG, e.getMessage());
}
}
public void openHelpFile() {
/* OPEN PDF File in Viewer */
Intent intent = new Intent();
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setAction(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(new File(cacheDir, "OOPS.pdf")), "application/pdf");
context.startActivity(intent);
}
}
和我有每个调用它 OptionMenu
是这样的:
and I have call it from every OptionMenu
like this:
new OpenHelpFile(context).openHelpFile();
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