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Class File Editor - Source not found - Change Attached Source - Eclipse


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The source attachment does not contain the source for the file TextWatcher.class.
You can change the source attachment by clicking Change Attached Source below:

You have to add JDK src.zip path to dialog as on image below.
[caption id="attachment_1091" align="alignleft" width="282" caption="class file editor source not found Eclipse warning"][/caption]



Or go to Project > Properties > Java Build Path > Libraries
Expand JRE System Library. Expand rt.jar.
Select Source attachment and double click or Edit.
Type path the source code file (External File…) and press OK.

[caption id="attachment_1094" align="alignleft" width="300" caption="Java project build path"][/caption]



Or type path in Java JRE definition



[caption id="attachment_1105" align="alignleft" width="300" caption="Java JRE deifiniton path in Eclipse"][/caption]

How open String.class or others keywords definition with Eclipse.



Now if mouse move about keywords String or F3 on keywords and press button in yellow field will opened String.class
Java Eclipse intellisense




Java-string-class-image

397LW NO topic_id




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Další témata ....(Topics)


356

No USB devices or running detected | no-usb-devices-or-running-detected


Check

  • is sett debug mode on device?

  • enabled debugging over USB?

  • is device right connected?

  • have you downloaded and instaled drivers for your device on PC?

  • For Windows //developer.android.com/sdk/win-usb.html

  • try disconnect and connect USB cable

  • try do restart Android Studio

214

LinkedMap HashMap Java | linkedmap-hashmap-java



Map<Float,String> linkedHashMap = new LinkedHashMap<Float, String>();

 linkedHashMap.put(14.f, "text");
 linkedHashMap.put(13.f, "text");
 linkedHashMap.put(10.f, "text");
 linkedHashMap.put(11.f, "text");
 linkedHashMap.put(2.f, "text");
 linkedHashMap.put(3.f, "text");
 linkedHashMap.put(1.f, "text");
 linkedHashMap.put(7.f, "text");
 linkedHashMap.put(23.f, "text");

	for (Entry<Float,String> entry : linkedHashMap.entrySet()) {
		System.out.println(entry.getKey());
	}
14.0
13.0
10.0
11.0
2.0
3.0
1.0
7.0
23.0

Map<Float,String> hashMap = new HashMap<Float, String>();

 hashMap.put(14.f, "text");
 hashMap.put(13.f, "text");
 hashMap.put(10.f, "text");
 hashMap.put(11.f, "text");
 hashMap.put(2.f, "text");
 hashMap.put(3.f, "text");
 hashMap.put(1.f, "text");
 hashMap.put(7.f, "text");
 hashMap.put(23.f, "text");

 
 
	for (Entry<Float,String> entry : hashMap.entrySet()) {
		System.out.println(entry.getKey());
	}
// key :
1.0
14.0
3.0
13.0
2.0
7.0
11.0
23.0
10.0


312

Import project Android Eclipse | import-project-android-eclipse


Import a new Android project for example downloaded from internet via Eclipse into project folder.

  1. Right click into projects explorer in Eclipse and select Import

  2. Android

  3. Existing Android Code Into Workspace

  4. Root Directory (select folder of downloaded project)

  5. Check your downloaded project

  6. Check Copy project into Workspace

  7. Finish (press)




313

Difference between logical operators and or Java | difference-between-logical-operators-and-or-java


Basic difference remember it!!!
if(TRUE && TRUE && TRUE) return TRUE otherwise FALSE

if(FALSE || FALSE || FALSE) return FALSE otherwise TRUE

Logical operator and &&
If all conditions/operands is TRUE return TRUE, otherwise return FALSE

if( true and true and true){ 
  // return true - do something
}
int a = 6;
if(a == 6 && a == 6 ) {
 // if TRUE
 // true && true return true, do something
}

if(a == 6 && a == 5){
  // nothing, not attended
}else{
  // true && false return false, or false && false return false 
  // do something
}


Logical operator or ||
The logical OR operator (||) returns the boolean value true if either or both operands is true and returns false otherwise.
If one operands is TRUE, condition is TRUE:

if(FALSE OR FALSE OR TRUE) return TRUE
if(FALSE OR TRUE OR FALSE) return TRUE
if(FALSE OR FALSE OR FALSE) return FALSE

int a = 6;
if(a==6 || a==5){ // TRUE || FALSE return TRUE
  //if return TRUE
  //one from operadns is TRUE return true,  do something
}

if(a==5 || a==4){ // FALSE || FALSE return FALSE
 // not attended
}else{
 //if return FALSE, do something
}

rev
333

SimpleCursorAdapter deprecated | simplecursoradapter-deprecated


Constructor SimpleCursorAdapter is deprecated.
If using api 11 and above, you can try add last parameter 0.


Cursor cursor = managedQuery(...........,,,,);
// Specify the columns we want to display in the result
            String[] from = new String[] { KEY_WORD,
                                           KEY_DEFINITION };

            // Specify the corresponding layout elements where we want the columns to go
            int[] to = new int[] { R.id.word,
                                   R.id.definition };
// deprecated 
 SimpleCursorAdapter words =
            new SimpleCursorAdapter(this,
                    R.layout.result, cursor, from, to);
// working
 SimpleCursorAdapter words =
            new SimpleCursorAdapter(this,
                    R.layout.result, cursor, from, to, 0); // to, 0!!!!


//working in Fragment
SimpleCursorAdapter  mAdapter = new SimpleCursorAdapter(getActivity(),
                android.R.layout.simple_list_item_2, null,
                new String[] { "name", "age" }, // cursor parameters
                new int[] { android.R.id.text1, android.R.id.text2 }, 0);




Editace: 2014-02-15 20:46:40
Počet článků v kategorii: 397
Url:class-file-editor-source-not-found-change-attached-source-eclipse

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