我在AndroidTabRestaurantDescFilterListView.java中获取NULL值
Filters.java
public class Filters extends Activity implements OnSeekBarChangeListener{
// declare text objects variables
private SeekBar PRICEbar,DISTANCEbar, RATINGbar;
private TextView PRICEtextProgress,DISTANCEtextProgress, RATINGtextProgress;
Button back;
Button FILTER;
private RadioGroup rdg;
private RadioButton indian;
private RadioButton thai;
private RadioButton chinese;
private String selectedType="";
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
// load the layout
setContentView(R.layout.filters);
/** Finding all the views in this Activity. */
PRICEbar = (SeekBar)findViewById(R.id.PRICEseekBarID); // make seekbar object
DISTANCEbar = (SeekBar)findViewById(R.id.DISTANCEseekBarID); // make seekbar object
RATINGbar = (SeekBar)findViewById(R.id.RATINGseekBarID); // make seekbar object
FILTER=(Button) findViewById(R.id.TopNavigationBarFilterDoneButton);
rdg = (RadioGroup) findViewById(R.id.radioGroup1);
indian = (RadioButton) findViewById(R.id.IndianRG_ID);
thai = (RadioButton) findViewById(R.id.ThaiRG_ID);
chinese = (RadioButton) findViewById(R.id.ChineseRG_ID);
back=(Button) findViewById(R.id.TopNavigationBarFilterBackButton);
back.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
finish();
}
});
PRICEbar.setOnSeekBarChangeListener(this);
PRICEbar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
// TODO Auto-generated method stub
PRICEtextProgress = (TextView)findViewById(R.id.PRICEtextViewProgressID);
PRICEtextProgress.setText("Price:: Rs "+progress);
seekBar.setMax(100);
}
});
////////////////////////////////////////////////////////
DISTANCEbar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
// TODO Auto-generated method stub
DISTANCEtextProgress = (TextView)findViewById(R.id.DISTANCEtextViewProgressID);
DISTANCEtextProgress.setText("Distance:: "+progress);
seekBar.setMax(25);
}
});
////////////////////////////////////////////////////////
RATINGbar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress,
boolean fromUser) {
// TODO Auto-generated method stub
RATINGtextProgress = (TextView)findViewById(R.id.RATINGtextViewProgressID);
RATINGtextProgress.setText("Rating:: "+progress);
seekBar.setMax(5);
RatingBar ratingBar = (RatingBar)findViewById(R.id.RATINGfinalvalueratingID);
ratingBar.setRating(5);
ratingBar.setFocusable(false);
RatingBar ratingBar1 = (RatingBar)findViewById(R.id.RATINGinitialvalueratingID);
ratingBar1.setRating(0);
ratingBar.setFocusable(false);
}
});
rdg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup radioGroup, int i) {
if(i==R.id.BreakfastRG_ID){
selectedType = indian.getText().toString();
}else if(i==R.id.LunchRG_ID){
selectedType = thai.getText().toString();
}else{
selectedType = chinese.getText().toString();
}
}
});
FILTER.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent FilterIntent=new Intent(Filters.this,AndroidTabRestaurantDescFilterListView.class);
FilterIntent.putExtra("REST1",selectedType);
FilterIntent.putExtra("PriceBar", PRICEbar.getProgress());
FilterIntent.putExtra("DistanceBar", DISTANCEbar.getProgress());
FilterIntent.putExtra("RatingBar", RATINGbar.getProgress());
startActivity(FilterIntent);
}
});
}
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
if (seekBar == PRICEbar)
PRICEtextProgress.setText("Price:: Rs "+progress);
else if (seekBar == DISTANCEbar)
DISTANCEtextProgress.setText("Distance:: "+progress);
else if (seekBar == RATINGbar)
RATINGtextProgress.setText("Rating:: "+progress);
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
// TODO Auto-generated method stub
}
}
AndroidTabRestaurantDescFilterListView.java
public class AndroidTabRestaurantDescFilterListView extends TabActivity {
// TabSpec Names
private static final String INBOX_SPEC = "Rating";
private static final String OUTBOX_SPEC = "Price";
private static final String PROFILE_SPEC = "Distance";
Button Photos;
Button Filter;
Button Search;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Photos=(Button) findViewById(R.id.PhotoButton);
Filter=(Button) findViewById(R.id.FilterButton);
Search=(Button) findViewById(R.id.SearchBottomBarID);
TabHost tabHost = getTabHost();
String REST1 = getIntent().getStringExtra("REST1");
String PriceBar = getIntent().getStringExtra("PriceBar");
String DistanceBar = getIntent().getStringExtra("DistanceBar");
String RatingBar = getIntent().getStringExtra("RatingBar");
// Tab
TabSpec inboxSpec = tabHost.newTabSpec(INBOX_SPEC);
Intent inboxIntent = new Intent(this, RatingDescriptionFilterActivity.class);
inboxIntent.putExtra("REST1", REST1);
inboxIntent.putExtra("PriceBar", PriceBar);
inboxIntent.putExtra("DistanceBar", DistanceBar);
inboxIntent.putExtra("RatingBar", RatingBar);
inboxSpec.setIndicator(INBOX_SPEC);
inboxSpec.setContent(inboxIntent);
// Tab
TabSpec PriceSpec = tabHost.newTabSpec(OUTBOX_SPEC);
Intent PriceIntent = new Intent(this, PriceDescriptionFilterActivity.class);
PriceIntent.putExtra("REST1", REST1);
PriceIntent.putExtra("PriceBar", PriceBar);
PriceIntent.putExtra("DistanceBar", DistanceBar);
PriceIntent.putExtra("RatingBar", RatingBar);
PriceSpec .setIndicator(OUTBOX_SPEC);
PriceSpec.setContent(PriceIntent);
// Tab
TabSpec DistanceSpec = tabHost.newTabSpec(PROFILE_SPEC);
Intent DistanceIntent = new Intent(this, DistanceDescriptionFilterActivity.class);
DistanceIntent.putExtra("REST1", REST1);
DistanceIntent.putExtra("PriceBar", PriceBar);
DistanceIntent.putExtra("DistanceBar", DistanceBar);
DistanceIntent.putExtra("RatingBar", RatingBar);
DistanceSpec .setIndicator(PROFILE_SPEC);
DistanceSpec.setContent(DistanceIntent);
// Adding all TabSpec to TabHost
tabHost.addTab(inboxSpec);
tabHost.addTab(PriceSpec);
tabHost.addTab(DistanceSpec);
//Set the current value tab to default first tab
tabHost.setCurrentTab(0);
//Setting custom height for the tabs
final int height = 45;
tabHost.getTabWidget().getChildAt(0).getLayoutParams().height = height;
tabHost.getTabWidget().getChildAt(1).getLayoutParams().height = height;
tabHost.getTabWidget().getChildAt(2).getLayoutParams().height = height;
Photos.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
Intent PhotoIntent=new Intent(AndroidTabRestaurantDescFilterListView.this,AndroidTabRestaurantDescImageListView.class);
startActivity(PhotoIntent);
}
});
Filter.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent FilterIntent=new Intent(AndroidTabRestaurantDescFilterListView.this,Filters.class);
startActivity(FilterIntent);
}
});
Search.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent FilterIntent=new Intent(AndroidTabRestaurantDescFilterListView.this,SearchPage.class);
startActivity(FilterIntent);
}
});
}
}
LOG
10-21 19:53:11.376: E/AndroidRuntime(1393): FATAL EXCEPTION: AsyncTask #2
10-21 19:53:11.376: E/AndroidRuntime(1393): java.lang.RuntimeException: An error occured while executing doInBackground()
10-21 19:53:11.376: E/AndroidRuntime(1393): at android.os.AsyncTask$3.done(AsyncTask.java:200)
10-21 19:53:11.376: E/AndroidRuntime(1393): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
10-21 19:53:11.376: E/AndroidRuntime(1393): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
10-21 19:53:11.376: E/AndroidRuntime(1393): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
10-21 19:53:11.376: E/AndroidRuntime(1393): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
10-21 19:53:11.376: E/AndroidRuntime(1393): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)
10-21 19:53:11.376: E/AndroidRuntime(1393): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561)
10-21 19:53:11.376: E/AndroidRuntime(1393): at java.lang.Thread.run(Thread.java:1096)
10-21 19:53:11.376: E/AndroidRuntime(1393): Caused by: java.lang.NullPointerException
10-21 19:53:11.376: E/AndroidRuntime(1393): at com.project.findmybuffet.RatingDescriptionFilterActivity$DownloadJSON.doInBackground(RatingDescriptionFilterActivity.java:86)
10-21 19:53:11.376: E/AndroidRuntime(1393): at com.project.findmybuffet.RatingDescriptionFilterActivity$DownloadJSON.doInBackground(RatingDescriptionFilterActivity.java:1)
10-21 19:53:11.376: E/AndroidRuntime(1393): at android.os.AsyncTask$2.call(AsyncTask.java:185)
10-21 19:53:11.376: E/AndroidRuntime(1393): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
10-21 19:53:11.376: E/AndroidRuntime(1393): ... 4 more
10-21 19:53:15.026: E/WindowManager(1393): Activity com.project.findmybuffet.AndroidTabRestaurantDescFilterListView has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@45fb1c10 that was originally added here
10-21 19:53:15.026: E/WindowManager(1393): android.view.WindowLeaked: Activity com.project.findmybuffet.AndroidTabRestaurantDescFilterListView has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@45fb1c10 that was originally added here
10-21 19:53:15.026: E/WindowManager(1393): at android.view.ViewRoot.<init>(ViewRoot.java:247)
10-21 19:53:15.026: E/WindowManager(1393): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:148)
10-21 19:53:15.026: E/WindowManager(1393): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:91)
10-21 19:53:15.026: E/WindowManager(1393): at android.view.Window$LocalWindowManager.addView(Window.java:424)
10-21 19:53:15.026: E/WindowManager(1393): at android.app.Dialog.show(Dialog.java:241)
10-21 19:53:15.026: E/WindowManager(1393): at com.project.findmybuffet.RatingDescriptionFilterActivity$DownloadJSON.onPreExecute(RatingDescriptionFilterActivity.java:77)
10-21 19:53:15.026: E/WindowManager(1393): at android.os.AsyncTask.execute(AsyncTask.java:391)
10-21 19:53:15.026: E/WindowManager(1393): at com.project.findmybuffet.RatingDescriptionFilterActivity.onCreate(RatingDescriptionFilterActivity.java:60)
10-21 19:53:15.026: E/WindowManager(1393): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
10-21 19:53:15.026: E/WindowManager(1393): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
10-21 19:53:15.026: E/WindowManager(1393): at android.app.ActivityThread.startActivityNow(ActivityThread.java:2503)
10-21 19:53:15.026: E/WindowManager(1393): at android.app.LocalActivityManager.moveToState(LocalActivityManager.java:127)
10-21 19:53:15.026: E/WindowManager(1393): at android.app.LocalActivityManager.startActivity(LocalActivityManager.java:339)
10-21 19:53:15.026: E/WindowManager(1393): at android.widget.TabHost$IntentContentStrategy.getContentView(TabHost.java:651)
10-21 19:53:15.026: E/WindowManager(1393): at android.widget.TabHost.setCurrentTab(TabHost.java:323)
10-21 19:53:15.026: E/WindowManager(1393): at android.widget.TabHost.addTab(TabHost.java:213)
10-21 19:53:15.026: E/WindowManager(1393): at com.project.findmybuffet.AndroidTabRestaurantDescFilterListView.onCreate(AndroidTabRestaurantDescFilterListView.java:87)
PRICEbar，DISTANCEbar，RATINGbar filter.java的意图传递给了
AndroidTabRestaurantDescFilterListView.java ....这三个都是从seekbars获得的整数AndroidTabRestaurantDescFilterListView.java课程
他们作为下一个活动的意图调试结果:: ** for ** AndroidTabRestaurantDescFilterListView
this AndroidTabRestaurantDescFilterListView (id=830102681688)
tabHost TabHost (id=830102691544)
savedInstanceState null
REST1 "Chinese" (id=830102732832)
PriceBar null
DistanceBar null
为什么我在这里得到NULL？
我该如何调试？
答案 0 :(得分：1)
String PriceBar = getIntent().getStringExtra("PriceBar");
应该是
int p = getIntent().getIntExtra("PriceBar")
答案 1 :(得分：1)
seekbar.getProgress()返回一个int值。
public synchronized int getProgress ()
Added in API level 1
Get the progress bar's current level of progress. Return 0 when the progress bar is in indeterminate mode.
Returns
the current progress, between 0 and getMax()
因此，在检索值时使用
int PriceBar = getIntent().getIntExtra("PriceBar",0);
int DistanceBar = getIntent().getIntExtra("DistanceBar",0);
int RatingBar = getIntent().getIntExtra("RatingBar",0);
getIntExtra
public int getIntExtra (String name, int defaultValue)
Added in API level 1
Retrieve extended data from the intent.
Parameters
name The name of the desired item.
defaultValue the value to be returned if no value of the desired type is stored with the given name.
Returns
the value of an item that previously added with putExtra() or the default value if none was found.