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[英]Best Practices: including a 'Sign in with Twitter' Button (Android)
[英]Android refresh button best practices?
嗨有一個加載Twitter提要的活動。
Android Twitter字符串到Json數組 。
我想在頂部放置一個刷新按鈕,當點擊重新加載數據時。
到目前為止,我已經得到它只是重新加載活動這是這樣做的最佳方式?
package co.uk.fantasticmedia.TheEvoStikLeague;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONArray;
import org.json.JSONObject;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
import android.app.ListActivity;
public class TwitterActivity extends ListActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.twitteract);
Button refresh = (Button) findViewById(R.id.btn_refresh);
//Listening to button event
refresh.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
//Starting a new Intent
Intent reload = new Intent(getApplicationContext(), TwitterActivity.class);
startActivity(reload);
}
});
try{
// Create a new HTTP Client
DefaultHttpClient defaultClient = new DefaultHttpClient();
// Setup the get request
HttpGet httpGetRequest = new HttpGet("https://api.twitter.com/1/statuses/user_timeline.json?screen_name=evostikleague&count=10");
// Execute the request in the client
HttpResponse httpResponse = defaultClient.execute(httpGetRequest);
// Grab the response
BufferedReader reader = new BufferedReader(new InputStreamReader(httpResponse.getEntity().getContent(), "UTF-8"));
String json = reader.readLine();
Log.v(json,"jsonfeed");
List<String> items = new ArrayList<String>();
//items.add(json);
JSONArray jArray = new JSONArray(json);
for (int i=0; i < jArray.length(); i++)
{ JSONObject oneObject = jArray.getJSONObject(i);
items.add(oneObject.getString("text"));
Log.i("items", "items");
}
setListAdapter ( new ArrayAdapter<String>(this, R.layout.single_item, items));
ListView list = getListView();
list.setTextFilterEnabled(true);
list.setOnItemClickListener(new OnItemClickListener(){
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), ((TextView) arg1).getText(),1000).show();
}
});
} catch(Exception e){
// In your production code handle any errors and catch the individual exceptions
e.printStackTrace();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == R.id.home) {
startActivity(new Intent(TwitterActivity.this, HomeActivity.class));
return(true);
}
if (item.getItemId() == R.id.match) {
startActivity(new Intent(TwitterActivity.this, MatchActivity.class));
return(true);
}
if (item.getItemId() == R.id.teams) {
startActivity(new Intent(TwitterActivity.this, TeamsActivity.class));
return(true);
}
if (item.getItemId() == R.id.twitter) {
startActivity(new Intent(TwitterActivity.this, TwitterActivity.class));
return(true);
}
if (item.getItemId() == R.id.info) {
startActivity(new Intent(TwitterActivity.this, InfoActivity.class));
return(true);
}
return(super.onOptionsItemSelected(item));
}
}
使用菜單提供“ 刷新”選項。 因此,當用戶按下手機上的菜單按鈕時,他們可以選擇刷新命令來重新加載推文
你能發布剩余的活動嗎? 特別是您第一次加載列表時使用的部分。
可能沒有必要重新啟動整個活動。 您只需將填充列表的代碼部分移動到自己的方法中即可。 然后,您可以在用戶想要刷新時調用該方法。
如果沒有其他你應該改變:
Intent reload = new Intent(getApplicationContext(), TwitterActivity.class);
至
Intent reload = new Intent(TwitterActivity.this, TwitterActivity.class);
編輯:您需要將try / catch塊移動到名為refresh()的新方法中。 然后在您想要重新加載列表的任何時候調用該方法。 像這樣:
將您的網絡移出主線程也是一個好主意。
public class TwitterActivity extends ListActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.twitteract);
Button refresh = (Button) findViewById(R.id.btn_refresh);
//Listening to button event
refresh.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
refresh();
}
});
refresh();
}
private void refresh(){
try{
// Create a new HTTP Client
DefaultHttpClient defaultClient = new DefaultHttpClient();
// Setup the get request
HttpGet httpGetRequest = new HttpGet("https://api.twitter.com/1/statuses/user_timeline.json?screen_name=evostikleague&count=10");
// Execute the request in the client
HttpResponse httpResponse = defaultClient.execute(httpGetRequest);
// Grab the response
BufferedReader reader = new BufferedReader(new InputStreamReader(httpResponse.getEntity().getContent(), "UTF-8"));
String json = reader.readLine();
Log.v(json,"jsonfeed");
List<String> items = new ArrayList<String>();
//items.add(json);
JSONArray jArray = new JSONArray(json);
for (int i=0; i < jArray.length(); i++)
{ JSONObject oneObject = jArray.getJSONObject(i);
items.add(oneObject.getString("text"));
Log.i("items", "items");
}
setListAdapter ( new ArrayAdapter<String>(this, R.layout.single_item, items));
ListView list = getListView();
list.setTextFilterEnabled(true);
list.setOnItemClickListener(new OnItemClickListener(){
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), ((TextView) arg1).getText(),1000).show();
}
});
} catch(Exception e){
// In your production code handle any errors and catch the individual exceptions
e.printStackTrace();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == R.id.home) {
startActivity(new Intent(TwitterActivity.this, HomeActivity.class));
return(true);
}
if (item.getItemId() == R.id.match) {
startActivity(new Intent(TwitterActivity.this, MatchActivity.class));
return(true);
}
if (item.getItemId() == R.id.teams) {
startActivity(new Intent(TwitterActivity.this, TeamsActivity.class));
return(true);
}
if (item.getItemId() == R.id.twitter) {
startActivity(new Intent(TwitterActivity.this, TwitterActivity.class));
return(true);
}
if (item.getItemId() == R.id.info) {
startActivity(new Intent(TwitterActivity.this, InfoActivity.class));
return(true);
}
return(super.onOptionsItemSelected(item));
}
}
這是更古老的刷新按鈕,但我在我的應用程序中運行良好。
public void refresh(View view){ //refresh is onClick name
onRestart();
}
@Override
protected void onRestart() {
// TODO Auto-generated method stub
super.onRestart();
Intent i = new Intent(lala.this, lala.class); //your class
startActivity(i);
finish();
}
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