Android 将截击图像传递给下一个活动
这个小问题已经困扰了我一段时间。它很简单,但让我感到困惑。我的第一个activty作为一个列表视图,使用截取下载json数据,点击进入细节activty,如下所示 我可以将标题发送到详细信息活动,但无法在图像上解析。 这是我的第一个活动:Android 将截击图像传递给下一个活动,android,json,android-volley,Android,Json,Android Volley,这个小问题已经困扰了我一段时间。它很简单,但让我感到困惑。我的第一个activty作为一个列表视图,使用截取下载json数据,点击进入细节activty,如下所示 我可以将标题发送到详细信息活动,但无法在图像上解析。 这是我的第一个活动: public class Movies extends ActionBarActivity{ // Log tag private static final String TAG = MainActivity.class.getSimpleN
public class Movies extends ActionBarActivity{
// Log tag
private static final String TAG = MainActivity.class.getSimpleName();
// Movies json url
private static final String url = "http://api.androidhive.info/json/movies.json";
private ProgressDialog pDialog;
private List<Movie> movieList = new ArrayList<Movie>();
private ListView listView;
private CustomListAdapter adapter;
private static String Title="title";
private static String bitmap="thumbnailUrl";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.event);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
Intent newActivity2=new Intent();
setResult(RESULT_OK, newActivity2);
listView = (ListView) findViewById(R.id.list);
adapter = new CustomListAdapter(this, movieList);
listView.setAdapter(adapter);
pDialog = new ProgressDialog(this);
// Showing progress dialog before making http request
pDialog.setMessage("Loading...");
pDialog.show();
// changing action bar color
getActionBar().setBackgroundDrawable(
new ColorDrawable(Color.parseColor("#1b1b1b")));
// Creating volley request obj
JsonArrayRequest movieReq = new JsonArrayRequest(url,
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
Log.d(TAG, response.toString());
pDialog.dismiss();
// Parsing json
for (int i = 0; i < response.length(); i++) {
try {
JSONObject obj = response.getJSONObject(i);
Movie movie = new Movie();
movie.setTitle(obj.getString("title"));
movie.setThumbnailUrl(obj.getString("image"));
movie.setRating(((Number) obj.get("rating"))
.doubleValue());
movie.setYear(obj.getInt("releaseYear"));
// Genre is json array
JSONArray genreArry = obj.getJSONArray("genre");
ArrayList<String> genre = new ArrayList<String>();
for (int j = 0; j < genreArry.length(); j++) {
genre.add((String) genreArry.get(j));
}
movie.setGenre(genre);
// adding movie to movies array
movieList.add(movie);
} catch (JSONException e) {
e.printStackTrace();
}
}
// notifying list adapter about data changes
// so that it renders the list view with updated data
adapter.notifyDataSetChanged();
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
if (error instanceof NoConnectionError){
Toast.makeText(getBaseContext(), "Bummer..There's No Internet connection!", Toast.LENGTH_LONG).show();
}};
});
// Adding request to request queue
ParseApplication.getInstance().addToRequestQueue(movieReq);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener(){
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
String name = ((TextView) view.findViewById(R.id.title))
.getText().toString();
Intent intent = new Intent(Movies.this, Detail.class);
intent.putExtra(Title, name);
intent.putExtra("images", bitmap);
startActivity(intent);
}
});}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
如果需要,我会发布更多的代码。我是这方面的新手,所以任何帮助都将不胜感激
CustomListAdapter:
public class CustomListAdapter extends BaseAdapter {
private Activity activity;
private LayoutInflater inflater;
private List<Movie> movieItems;
ImageLoader imageLoader = AppController.getInstance().getImageLoader();
public CustomListAdapter(Activity activity, List<Movie> movieItems) {
this.activity = activity;
this.movieItems = movieItems;
}
@Override
public int getCount() {
return movieItems.size();
}
@Override
public Object getItem(int location) {
return movieItems.get(location);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (inflater == null)
inflater = (LayoutInflater) activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null)
convertView = inflater.inflate(R.layout.list_row, null);
if (imageLoader == null)
imageLoader = AppController.getInstance().getImageLoader();
NetworkImageView thumbNail = (NetworkImageView) convertView
.findViewById(R.id.thumbnail);
TextView title = (TextView) convertView.findViewById(R.id.title);
TextView rating = (TextView) convertView.findViewById(R.id.rating);
TextView genre = (TextView) convertView.findViewById(R.id.genre);
TextView year = (TextView) convertView.findViewById(R.id.releaseYear);
// getting movie data for the row
Movie m = movieItems.get(position);
// thumbnail image
thumbNail.setImageUrl(m.getThumbnailUrl(), imageLoader);
// title
title.setText(m.getTitle());
// rating
rating.setText("Rating: " + String.valueOf(m.getRating()));
// genre
String genreStr = "";
for (String str : m.getGenre()) {
genreStr += str + ", ";
}
genreStr = genreStr.length() > 0 ? genreStr.substring(0,
genreStr.length() - 2) : genreStr;
genre.setText(genreStr);
// release year
year.setText(String.valueOf(m.getYear()));
return convertView;
}
}
公共类CustomListAdapter扩展了BaseAdapter{
私人活动;
私人充气机;
私人电影项目清单;
ImageLoader ImageLoader=AppController.getInstance().getImageLoader();
公共CustomListAdapter(活动,列出电影项目){
这个。活动=活动;
this.movieItems=movieItems;
}
@凌驾
public int getCount(){
返回movieItems.size();
}
@凌驾
公共对象getItem(int位置){
返回电影项目。获取(位置);
}
@凌驾
公共长getItemId(int位置){
返回位置;
}
@凌驾
公共视图getView(int位置、视图转换视图、视图组父视图){
如果(充气器==null)
充气器=(充气器)活动
.getSystemService(上下文布局\充气机\服务);
if(convertView==null)
convertView=充气机。充气(R.layout.list_行,空);
如果(imageLoader==null)
imageLoader=AppController.getInstance().getImageLoader();
NetworkImageView缩略图=(NetworkImageView)convertView
.findviewbyd(R.id.thumboil);
TextView title=(TextView)convertView.findViewById(R.id.title);
TextView评级=(TextView)convertView.findViewById(R.id.rating);
TextView流派=(TextView)convertView.findViewById(R.id.genre);
TextView year=(TextView)convertView.findViewById(R.id.releaseYear);
//正在获取行的电影数据
Movie m=movieItems.get(位置);
//缩略图像
setImageUrl(m.getThumbnailUrl(),imageLoader);
//头衔
title.setText(m.getTitle());
//评级
rating.setText(“rating:+String.valueOf(m.getRating()));
//体裁
字符串genrest=“”;
for(String str:m.getgreen()){
genrest+=str+“,”;
}
genstr=genstr.length()>0?genstr.substring(0,
genstr.length()-2):genstr;
类型。setText(genrest);
//发布年份
year.setText(String.valueOf(m.getYear());
返回视图;
}
}
您没有在“详细信息”活动中检索位图:
Bitmap bitmap = (Bitmap) i.getParcelableExtra("images");
然后对该位图执行任何需要的操作您需要在详细信息页面中检索缩略图url,如下所示
String bitmap = i.getStringExtra("images"); // Use this in details page
现在,您可以使用此位图
在详细信息页面中加载图像
编辑
在Movies
类中的onItemClick()
bitmap = ((Movie)movieList.get(position)).getThumbnailUrl();
Intent intent = new Intent(Movies.this, Detail.class);
intent.putExtra(Title, name);
intent.putExtra("images", bitmap);
将此添加到您的详细信息活动onCreate()
我有完全相同的代码,但我在片段中使用。有人告诉我们如何将JSON值从片段传递给活动。我想将Lastest_fragment.java改为News_Detail.java(新活动)
Lastest_Fragment.java
公共类LatestFragment扩展了片段{
private static final String TAG=LatestFragment.class.getSimpleName();
//电影json url
私有静态最终字符串url=”http://api.androidhive.info/json/movies.json";
私人对话;
private List movieList=new ArrayList();
私有列表视图列表视图;
专用自定义列表适配器;
私有静态字符串Title=“Title”;
私有静态字符串bitmap=“thumbnailUrl”;
@凌驾
CreateView上的公共视图(布局、充气机、视图组容器、捆绑包保存状态){
视图v=充气机。充气(R.layout.latest_layout,container,false);
Intent intent2=新Intent();
getActivity().setResult(Activity.RESULT_OK,intent2);
//getActivity().finish();
listView=(listView)v.findViewById(R.id.list);
adapter=新的CustomListAdapter(getActivity(),movieList);
setAdapter(适配器);
pDialog=newprogressdialog(getActivity());
//在发出http请求之前显示进度对话框
设置消息(“加载…”);
pDialog.show();
//更改操作栏颜色
//getActivity().getActionBar().setBackgroundDrawable(新的ColorDrawable(Color.parseColor(#1b1b1b”));
//创建截击请求对象
JsonArrayRequest movieReq=新的JsonArrayRequest(url,
新的Response.Listener(){
@凌驾
公共void onResponse(JSONArray响应){
Log.d(TAG,response.toString());
hidePDialog();
//解析json
对于(int i=0;ibitmap = ((Movie)movieList.get(position)).getThumbnailUrl();
Intent intent = new Intent(Movies.this, Detail.class);
intent.putExtra(Title, name);
intent.putExtra("images", bitmap);
ImageLoader imageLoader = AppController.getInstance().getImageLoader();
String bitmap = i.getStringExtra("images");
thumbNail.setImageUrl(bitmap, imageLoader);
Lastest_Fragment.java
public class LatestFragment extends Fragment {
private static final String TAG = LatestFragment.class.getSimpleName();
// Movies json url
private static final String url = "http://api.androidhive.info/json/movies.json";
private ProgressDialog pDialog;
private List<Movie> movieList = new ArrayList<Movie>();
private ListView listView;
private CustomListAdapter adapter;
private static String Title="title";
private static String bitmap="thumbnailUrl";
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.latest_layout, container, false);
Intent intent2 = new Intent();
getActivity().setResult(Activity.RESULT_OK, intent2);
// getActivity().finish();
listView = (ListView) v.findViewById(R.id.list);
adapter = new CustomListAdapter(getActivity(), movieList);
listView.setAdapter(adapter);
pDialog = new ProgressDialog(getActivity());
// Showing progress dialog before making http request
pDialog.setMessage("Loading...");
pDialog.show();
// changing action bar color
// getActivity().getActionBar().setBackgroundDrawable( new ColorDrawable(Color.parseColor("#1b1b1b")));
// Creating volley request obj
JsonArrayRequest movieReq = new JsonArrayRequest(url,
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
Log.d(TAG, response.toString());
hidePDialog();
// Parsing json
for (int i = 0; i < response.length(); i++) {
try {
JSONObject obj = response.getJSONObject(i);
Movie movie = new Movie();
movie.setTitle(obj.getString("title"));
movie.setThumbnailUrl(obj.getString("image"));
movie.setRating(((Number) obj.get("rating"))
.doubleValue());
movie.setYear(obj.getInt("releaseYear"));
// Genre is json array
JSONArray genreArry = obj.getJSONArray("genre");
ArrayList<String> genre = new ArrayList<String>();
for (int j = 0; j < genreArry.length(); j++) {
genre.add((String) genreArry.get(j));
}
movie.setGenre(genre);
// adding movie to movies array
movieList.add(movie);
} catch (JSONException e) {
e.printStackTrace();
}
}
// notifying list adapter about data changes
// so that it renders the list view with updated data
adapter.notifyDataSetChanged();
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
if (error instanceof NoConnectionError){
Toast.makeText(getActivity().getBaseContext(), "Bummer..There's No Internet connection!", Toast.LENGTH_LONG).show();
}
}
});
// Adding request to request queue
AppController.getInstance().addToRequestQueue(movieReq);
//ParseApplication.getInstance().addToRequestQueue(movieReq);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// TODO Auto-generated method stub
String name = ((TextView) view.findViewById(R.id.title)).getText().toString();
bitmap = ((Movie)movieList.get(position)).getThumbnailUrl();
Intent intent = new Intent(getActivity(), News_Detail.class);
intent.putExtra(Title, name);
intent.putExtra("images", bitmap);
startActivity(intent);
}
});
return v;
}
News_detail.java
public class News_Detail extends AppCompatActivity {
Intent intent = getIntent();
String name = intent.getStringExtra("name");
private static String Title="title";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.news_detail);
getSupportActionBar().hide();
Intent i = getIntent();
ImageLoader imageLoader = AppController.getInstance().getImageLoader();
String name = i.getStringExtra(Title);
String bitmap = i.getStringExtra("images");
NetworkImageView thumbNail = (NetworkImageView) findViewById(R.id.thumbnail);
thumbNail.setImageUrl(bitmap, imageLoader);
TextView lblname = (TextView) findViewById(R.id.name_label);
lblname.setText(name);
}
public void onClickHandler(View v){
switch(v.getId()){
case R.id.thumbnail:startActivity(new Intent(this,LatestFragment.class));
}
}
}
Intent intent = new Intent(view.getContext(), ItemContents.class);
intent.putExtra("Position", position);
ShopsModel item = (ShopsModel) adapter.getItem(position);
intent.putExtra("logo", item.getThumbnailUrl());
startActivity(intent);
NetworkImageView img = (NetworkImageView) findViewById(R.id.tv_ic_thumbnail);
ImageLoader imageLoader = AppController.getInstance().getImageLoader();
String bitmap = intent.getStringExtra("logo");
img.setImageUrl(bitmap, imageLoader);