我是Android的新手，我需要一些帮助我想通过向imageAdapter发送一个stringurls数组来设置一个带有3个图像按钮的gridview，我首先从webservice中获取网址并将它们返回给我的片段类，其中一个gridview被放置。 arraylist由具有url字符串集的对象组成。我不知道如何使用这些网址加载gridview，我应该将它们转换为drawables吗？我看到一些关于使用asynchtask的帖子？有人可以帮我吗？我实际上需要图像按钮，还是可以将点击监听器连接到图像视图？
下载url表单webservice
后，在fragment类中启动methode public class ImageAdapter extends BaseAdapter {
private Context mContext;
private ArrayList<Movie> movies;
Drawable[] drawableArray = new Drawable[3];
public ImageAdapter(Context c, ArrayList<Movie> movies) {
mContext = c;
this.movies = movies;
}
public int getCount() {
return drawableArray.length;
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return 0;
}
// create a new ImageView for each item referenced by the Adapter
public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView = null;
// how to convert string url to imageview?
imageView = new ImageButton(mContext);
imageView.setId(position);
imageView.setLayoutParams(new GridView.LayoutParams(200, 250));
return imageView;
}
}
ImageAdapter类：
Randolph-Wiafes-MacBook-Pro:plbg randy$ npm i
npm WARN engine email-templates@0.1.8: wanted: {"node":"0.8.x | 0.10.x"} (current: {"node":"0.12.2","npm":"2.7.4"})
> contextify@0.1.13 install /Users/randy/Desktop/plbg/node_modules/email-templates/node_modules/juice/node_modules/jsdom/node_modules/contextify
> node-gyp rebuild
CXX(target) Release/obj.target/contextify/src/contextify.o
SOLINK_MODULE(target) Release/contextify.node
SOLINK_MODULE(target) Release/contextify.node: Finished
> node-sass@0.8.6 install /Users/randy/Desktop/plbg/node_modules/email-templates/node_modules/node-sass
> node build.js
child_process: customFds option is deprecated, use stdio instead.
CXX(target) Release/obj.target/binding/binding.o
In file included from ../binding.cpp:1:
../node_modules/nan/nan.h:339:13: error: no member named 'New' in 'v8::String'
return _NAN_ERROR(v8::Exception::Error, errmsg);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../node_modules/nan/nan.h:319:50: note: expanded from macro '_NAN_ERROR'
# define _NAN_ERROR(fun, errmsg) fun(v8::String::New(errmsg))
~~~~~~~~~~~~^
../node_modules/nan/nan.h:343:5: error: no member named 'ThrowException' in
namespace 'v8'
_NAN_THROW_ERROR(v8::Exception::Error, errmsg);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../node_modules/nan/nan.h:324:11: note: expanded from macro '_NAN_THROW_ERROR'
v8::ThrowException(_NAN_ERROR(fun, errmsg)); \
~~~~^
../node_modules/nan/nan.h:343:5: error: no member named 'New' in 'v8::String'
_NAN_THROW_ERROR(v8::Exception::Error, errmsg);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../node_modules/nan/nan.h:324:26: note: expanded from macro '_NAN_THROW_ERROR'
v8::ThrowException(_NAN_ERROR(fun, errmsg)); \
^~~~~~~~~~~~~~~~~~~~~~~
../node_modules/nan/nan.h:319:50: note: expanded from macro '_NAN_ERROR'
# define _NAN_ERROR(fun, errmsg) fun(v8::String::New(errmsg))
~~~~~~~~~~~~^
../node_modules/nan/nan.h:348:9: error: no type named 'ThrowException' in
namespace 'v8'
v8::ThrowException(error);
~~~~^
../node_modules/nan/nan.h:355:65: error: no member named 'New' in 'v8::String'
v8::Local<v8::Value> err = v8::Exception::Error(v8::String::New(msg));
~~~~~~~~~~~~^
../node_modules/nan/nan.h:357:26: error: no member named 'New' in 'v8::String'
obj->Set(v8::String::New("code"), v8::Int32::New(errorNumber));
~~~~~~~~~~~~^
../node_modules/nan/nan.h:357:65: error: too few arguments to function call,
expected 2, have 1
obj->Set(v8::String::New("code"), v8::Int32::New(errorNumber));
~~~~~~~~~~~~~~ ^
/Users/randy/.node-gyp/0.12.2/deps/v8/include/v8.h:2012:3: note: 'New' declared
here
static Local<Integer> New(Isolate* isolate, int32_t value);
^
In file included from ../binding.cpp:1:
../node_modules/nan/nan.h:369:12: error: no member named 'New' in 'v8::String'
return _NAN_ERROR(v8::Exception::TypeError, errmsg);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../node_modules/nan/nan.h:319:50: note: expanded from macro '_NAN_ERROR'
# define _NAN_ERROR(fun, errmsg) fun(v8::String::New(errmsg))
~~~~~~~~~~~~^
../node_modules/nan/nan.h:373:5: error: no member named 'ThrowException' in
namespace 'v8'
_NAN_THROW_ERROR(v8::Exception::TypeError, errmsg);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../node_modules/nan/nan.h:324:11: note: expanded from macro '_NAN_THROW_ERROR'
v8::ThrowException(_NAN_ERROR(fun, errmsg)); \
~~~~^
../node_modules/nan/nan.h:373:5: error: no member named 'New' in 'v8::String'
_NAN_THROW_ERROR(v8::Exception::TypeError, errmsg);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../node_modules/nan/nan.h:324:26: note: expanded from macro '_NAN_THROW_ERROR'
v8::ThrowException(_NAN_ERROR(fun, errmsg)); \
^~~~~~~~~~~~~~~~~~~~~~~
../node_modules/nan/nan.h:319:50: note: expanded from macro '_NAN_ERROR'
# define _NAN_ERROR(fun, errmsg) fun(v8::String::New(errmsg))
~~~~~~~~~~~~^
../node_modules/nan/nan.h:377:12: error: no member named 'New' in 'v8::String'
return _NAN_ERROR(v8::Exception::RangeError, errmsg);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../node_modules/nan/nan.h:319:50: note: expanded from macro '_NAN_ERROR'
# define _NAN_ERROR(fun, errmsg) fun(v8::String::New(errmsg))
~~~~~~~~~~~~^
../node_modules/nan/nan.h:381:5: error: no member named 'ThrowException' in
namespace 'v8'
_NAN_THROW_ERROR(v8::Exception::RangeError, errmsg);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../node_modules/nan/nan.h:324:11: note: expanded from macro '_NAN_THROW_ERROR'
v8::ThrowException(_NAN_ERROR(fun, errmsg)); \
~~~~^
../node_modules/nan/nan.h:381:5: error: no member named 'New' in 'v8::String'
_NAN_THROW_ERROR(v8::Exception::RangeError, errmsg);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../node_modules/nan/nan.h:324:26: note: expanded from macro '_NAN_THROW_ERROR'
v8::ThrowException(_NAN_ERROR(fun, errmsg)); \
^~~~~~~~~~~~~~~~~~~~~~~
../node_modules/nan/nan.h:319:50: note: expanded from macro '_NAN_ERROR'
# define _NAN_ERROR(fun, errmsg) fun(v8::String::New(errmsg))
~~~~~~~~~~~~^
../node_modules/nan/nan.h:727:49: error: too few arguments to function call,
single argument 'isolate' was not specified
v8::Local<v8::Object> obj = v8::Object::New();
~~~~~~~~~~~~~~~ ^
/Users/randy/.node-gyp/0.12.2/deps/v8/include/v8.h:2388:3: note: 'New' declared
here
static Local<Object> New(Isolate* isolate);
^
In file included from ../binding.cpp:1:
../node_modules/nan/nan.h:733:49: error: too few arguments to function call,
single argument 'isolate' was not specified
v8::Local<v8::Object> obj = v8::Object::New();
~~~~~~~~~~~~~~~ ^
/Users/randy/.node-gyp/0.12.2/deps/v8/include/v8.h:2388:3: note: 'New' declared
here
static Local<Object> New(Isolate* isolate);
^
In file included from ../binding.cpp:1:
../node_modules/nan/nan.h:740:12: error: no member named 'Dispose' in
'v8::Persistent<v8::Object, v8::NonCopyablePersistentTraits<v8::Object> >'
handle.Dispose();
~~~~~~ ^
../node_modules/nan/nan.h:741:12: error: no member named 'Clear' in
'v8::Persistent<v8::Object, v8::NonCopyablePersistentTraits<v8::Object> >'
handle.Clear();
~~~~~~ ^
../node_modules/nan/nan.h:746:39: error: no member named 'NewSymbol' in
'v8::String'; did you mean 'IsSymbol'?
NanPersistentToLocal(handle)->Set(NanSymbol("callback"), fn);
^~~~~~~~~~~~~~~~~~~~~
../node_modules/nan/nan.h:181:38: note: expanded from macro 'NanSymbol'
#define NanSymbol(value) v8::String::NewSymbol(value)
~~~~~~~~~~~~^
/Users/randy/.node-gyp/0.12.2/deps/v8/include/v8.h:1379:8: note: 'IsSymbol'
declared here
bool IsSymbol() const;
^
In file included from ../binding.cpp:1:
../node_modules/nan/nan.h:746:39: error: call to non-static member function
without an object argument
NanPersistentToLocal(handle)->Set(NanSymbol("callback"), fn);
^~~~~~~~~~~~~~~~~~~~~
../node_modules/nan/nan.h:181:38: note: expanded from macro 'NanSymbol'
#define NanSymbol(value) v8::String::NewSymbol(value)
~~~~~~~~~~~~^~~~~~~~~
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
make: *** [Release/obj.target/binding/binding.o] Error 1
gyp ERR! build error
gyp ERR! stack Error: `make` failed with exit code: 2
gyp ERR! stack at ChildProcess.onExit (/usr/local/lib/node_modules/npm/node_modules/node-gyp/lib/build.js:269:23)
gyp ERR! stack at ChildProcess.emit (events.js:110:17)
gyp ERR! stack at Process.ChildProcess._handle.onexit (child_process.js:1074:12)
gyp ERR! System Darwin 14.3.0
gyp ERR! command "node" "/usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /Users/randy/Desktop/plbg/node_modules/email-templates/node_modules/node-sass
gyp ERR! node -v v0.12.2
gyp ERR! node-gyp -v v1.0.3
gyp ERR! not ok
Build failed
npm ERR! Darwin 14.3.0
npm ERR! argv "node" "/usr/local/bin/npm" "i"
npm ERR! node v0.12.2
npm ERR! npm v2.7.4
npm ERR! code ELIFECYCLE
npm ERR! node-sass@0.8.6 install: `node build.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the node-sass@0.8.6 install script 'node build.js'.
npm ERR! This is most likely a problem with the node-sass package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! node build.js
npm ERR! You can get their info via:
npm ERR! npm owner ls node-sass
npm ERR! There is likely additional logging output above.
npm ERR! Please include the following file with any support request:
npm ERR! /Users/randy/Desktop/plbg/npm-debug.log
答案 0 :(得分：0)
这很简单，请使用picaso lib http://square.github.io/picasso/
.tabcontentnav > li:last-child > a {
margin-right: 0;
}