Okhelp.cz

Recepty, články, nápady, programování. Dříve dum-zahrada, finance, internet a know-how.okhelp.cz Pro lepší výsledky hledání používejte i diakritiku.

Start Open New Activity Android Code


AD MOB


      Intent i = new Intent(this, MyNextClass.class);
      startActivity(i);



397LW NO topic_id




AD

Další témata ....(Topics)


1

Create TextView dynamically Android sample | create-textview-dinamically


Example source code for Android Developers

// clickable TextView
public TextView createTextView(String sText, Context con){
 TextView b = null;
 try {
  b = new TextView (con);
  b.setTextSize(15.0f);
  b.setTextColor(Color.rgb( 0, 0, 200));
  b.setOnClickListener(this);
  b.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,
  LayoutParams.WRAP_CONTENT));
  b.setText(sText);
  //tr.addView(b, 60,30);
  } catch (Exception e) {
  e.printStackTrace();
 return b;
 }
return b;
}
/*****************/
public void onClick(View view) {
 try {
  String s = ((TextView) view).getText().toString();
 }
 catch (Exception e1) {
   e1.printStackTrace();
 }
}
/***********/

// if you want restore in TextView after chagne of orientation
// you have to put  code to Manifest.xml android:configChanges

activity android:name=".main"
android:label="@string/app_name"
android:configChanges="keyboardHidden|orientation" //this line important !!!!!!!

24

Sqlite create database and table with BAT file for Android | sqlite-create-database-and-table-with-bat-file


Sqlite3 create database and table with load.bat file and fill data to table example.


  1. Create folder for your project: my_sqlite_project

  2. Open folder and create file load.bat and paste to load.bat this text and save to project folder:


    sqlite3 my_database.s3db < load_text.sql
    pause



  3. Create load_text.sql file and paste this text and save to project folder:

    CREATE TABLE [android_metadata] (
    [locale] TEXT
    );




    CREATE TABLE [my_table] (
    [_id] int NULL,
    [word] VARCHAR(255) NULL,
    [description] VARCHAR(255) NULL




    .separator ";"
    .import text_file.txt my_table


  4. Create text_file.txt and paste this text and save it as UTF-8:

    1;word1;my first word
    2;word2; my second word



  5. Download sqlite3.exe and put to project folder.

  6. Run BAT file load.bat and read text instruction from console

  7. If database created you can open and edit this with sqlite database explorer

  8. Copy database to Asses Android project folder

  9. If you want using this database in Android application on device, you have to copy this database to folder on device /data/data/com.MyPackage/databases/









122

Eclipse Graphical Editor does not display a xml source code - error bug | eclipse-graphical-editor-does-not-display-code-error-bug


Try this solutions:
1.) Save xml file
2.) Close tab with xml file
3.) Reopen xml file

1.) Open from menu Window->Android SDK Manager
2.) Select available updates (Tools, SDK etc.)
3.) Install updates

1.) Open from menu Help->Check for Updates
2.) Install available plugins what You need
3.) Restart Eclipse


100

How evaluate any expression in Eclipse debugger editor Android example | how-evaluate-any-expression-in-eclipse-debugger-editor-android-example


Tutorial by pictures how evaluate a variable in Eclipse debugger window.

1.) Open Debug perspective in Eclipse and to start debugging a Activity.
eclipse-debug-perspective


2.) Open Display window from menu Window->Show view->Display

eclipse dislplay window

3.) Set breakpoint where you need to evaluate a variable.

eclipse-toggle-breakpoint

4.) Debug the Activity to breakpoint.

eclipse-debugger-breakpoint


5.) Into the Display window type code for evaluate your variable and execute code.

eclipse-type-evaluate-code-to-display-window


6.) Check if change of value a variable

eclipse-evaluate-a-variable

132

Draw circle Android basic example | draw-circle-android-basic-example


Canvas, drawCircle(), Paint, onDraw(), setStrokeWidth(), setStyle()

public class MainActivity extends Activity {
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(new SampleView(this));
	}

	private static class SampleView extends View {

		// CONSTRUCTOR
		public SampleView(Context context) {
			super(context);
			setFocusable(true);

		}

		@Override
		protected void onDraw(Canvas canvas) {

			canvas.drawColor(Color.CYAN);
			Paint p = new Paint();
			// smooths
			p.setAntiAlias(true);
			p.setColor(Color.RED);
			p.setStyle(Paint.Style.STROKE); 
			p.setStrokeWidth(4.5f);
			// opacity
			//p.setAlpha(0x80); //
			canvas.drawCircle(50, 50, 30, p);
		}

	}
}



Editace: 2013-07-21 13:33:10
Počet článků v kategorii: 397
Url:start-open-new-activity-android-code

AD
11 Share
Share
Tweet