【发布时间】：2016-12-01 23:38:16
【问题描述】：
所以我想做的是来自：
主屏幕---新活动--->INTERNETSEARCHSCREEN----新活动--->编辑屏幕
我正在获取 json，它在我的列表视图中显示良好，但现在我想从列表视图中选择一部电影并获取电影名称/年份/夏季/图像 URL 并将其显示在 EDITSCREEN 但是当我这样做时，我得到了所有json数据而不是我想要的指定字段....嗯，我不知道我是否应该将它存储在sql中或等待并在编辑屏幕中将其添加到我的数据库中，欢迎任何意见：D
public class AddFromInternet extends AppCompatActivity {
MovieDataSource mds;
public EditText EtSearch;
public ListView listViewInternetScreen;
Button btnCancel;
Button btnGo;
ArrayAdapter<String> arrayAdapter;
ArrayList<String> nameOfMovie = new ArrayList<>();
ArrayList<String> yearOfMovie = new ArrayList<>();
ArrayList<String> id = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mds = new MovieDataSource(this);
setContentView(R.layout.activity_add_from_internet);
EtSearch = (EditText) findViewById(R.id.EtSearch);
listViewInternetScreen = (ListView) findViewById(R.id.listViewInternetScreen);
btnGo = (Button) findViewById(R.id.btnGo);
assert btnGo != null;
btnGo.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
final String search = "http://www.omdbapi.com/?s=" + EtSearch.getText().toString();
Log.e("JSON", search);
new JSONParser().execute(search);
ArrayList<String> list = new ArrayList<>(nameOfMovie);
arrayAdapter = new ArrayAdapter<>(AddFromInternet.this,
android.R.layout.simple_list_item_1, list);
arrayAdapter.notifyDataSetChanged();
listViewInternetScreen.setAdapter(arrayAdapter);
Log.e("JSON MOVIE", String.valueOf(nameOfMovie));
}
});
btnCancel = (Button) findViewById(R.id.btnCancelSearch);
btnCancel.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
listViewInternetScreen.setAdapter(null);
nameOfMovie.clear();
arrayAdapter.notifyDataSetChanged();
EtSearch.setText("");
Log.e("JSON MOVIE", String.valueOf(nameOfMovie));
}
});
listViewInternetScreen.setClickable(true);
listViewInternetScreen.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position, long i) {
//Movies newmovie= arrayAdapter.getItem(position);
String moviename = String.valueOf(nameOfMovie);
String moviesummery = String.valueOf(yearOfMovie);
String imageUrl = String.valueOf(id);
Movies newmovie = new Movies(moviename,moviesummery,imageUrl,0);
mds.open();
//will send all data to DB
newmovie = mds.createMovies(newmovie);
Log.e("JSON TO SQL", String.valueOf(mds.allColumns));
mds.close();
Intent intenttoEditScreen=new Intent(AddFromInternet.this, EditMovie.class);
setResult(RESULT_OK,intenttoEditScreen);
intenttoEditScreen.putExtra("rowId", newmovie.getMovieId());
startActivity(intenttoEditScreen);
}
});
}
//will create the jsonparser and the asynctask in this class for ease of use
public class JSONParser extends AsyncTask<String, String , String> {
ProgressDialog dialogue;
Context context;
@Override
protected void onProgressUpdate(String... values) {
ProgressDialog progdialog = ProgressDialog.show(AddFromInternet.this,"dsa","das",true);
super.onProgressUpdate(values);
}
@Override
protected String doInBackground(String... params) {
HttpURLConnection httpConnection = null;
BufferedReader reader = null;
StringBuffer buffer = new StringBuffer();
try {
URL url = new URL(params[0]);
httpConnection = (HttpURLConnection) url.openConnection();
Log.e("Json error"," try conntect to internet");
httpConnection.connect();
Log.e("Json error","sucsses connecting to the internet");
InputStream stream = httpConnection.getInputStream();
reader = new BufferedReader(new InputStreamReader(stream));
String line = "";
while ((line = reader.readLine()) != null) {
buffer.append(line);
}
return buffer.toString();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
finally {
if (httpConnection != null)
httpConnection.disconnect();
try {
if (reader != null)
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return "Json wasn't downloaded...";
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
//dialogue.dismiss();
arrayAdapter.notifyDataSetChanged();
String finalJson = result;
try {
JSONObject jsonObject = new JSONObject(finalJson);
JSONArray parentArray = jsonObject.getJSONArray("Search");
StringBuffer finalStringBuffer = new StringBuffer();
for (int i=0; i<parentArray.length(); i++){
JSONObject finalJsonObject = parentArray.getJSONObject(i);
String movieName = finalJsonObject.getString("Title");
nameOfMovie.add(movieName);
String year = finalJsonObject.getString("Year");
yearOfMovie.add(year);
String omdbID = finalJsonObject.getString("imdbID");
id.add(omdbID);
finalStringBuffer.append(movieName + " , " + year + " , " + omdbID + "\n");
}
}
catch (JSONException e) {
e.printStackTrace();
}
}
/* @Override
protected void onPreExecute() {
super.onPreExecute();
dialogue = new ProgressDialog();
dialogue.setTitle("Loading items..");
dialogue.show();
}*/
}
}
和编辑屏幕：
public class EditMovie extends AppCompatActivity {
EditText etMovieName ;
EditText etMoviewSummery;
EditText etURL ;
Button btnsave;
Button btnshow;
Button btncancel;
MovieDataSource mds;
long id ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_edit_movie);
//Instantiate DB query class
mds=new MovieDataSource(this);
//Run init method
init();
//method to save/update customer to DB
btnsave.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String moviename=etMovieName.getText().toString();
String moviesummery=etMoviewSummery.getText().toString();
String imageurl=etURL.getText().toString();
//Instantiate , values from Intent
Movies newmovie=new Movies(moviename,moviesummery,imageurl,id);
mds.open();
//will access the CustomerDataSource class to updateByRow method
mds.updateByRow(newmovie);
mds.close();
//Transfering result to MainActivity
Intent i=new Intent();
setResult(RESULT_OK,i);
finish();
}
});
}
public void init()
{
etMovieName=(EditText) findViewById(R.id.etMovieNameEDIT);
etMoviewSummery=(EditText) findViewById(R.id.etSummeryEDIT);
etURL=(EditText) findViewById(R.id.etURLEDIT);
btnsave=(Button) findViewById(R.id.btnsaveEDIT);
//btndelete=(Button) findViewById(R.id.updateBtnDelete);
// tvId=(TextView) findViewById(R.id.updatetvId);
//get the intent with the row id number & request code
id = getIntent().getLongExtra("rowId", 0);
//If DB row number is not 0
if(id!=0) {
//open DB connection
mds.open();
//Instantiate and get the movie id from calling screen
Movies c = mds.getMovieById(id);
etMovieName.setText(c.getMovieName());
etMoviewSummery.setText(c.getMovieSummery());
etURL.setText(c.getImageURL());
mds.close();
}
}
}
啊，如果有人知道为什么我需要单击两次“开始”按钮才能搜索？
感谢任何愿意/试图提供帮助的人：D
【问题讨论】：
标签： android json sqlite listview