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Datei 1: CalendarActivity.java

Android TextView in Table ausrichten

 

Dieser Beitrag zeigt, wie man in Android in einer Tabelle Anzeigeelemente in einer Zelle zur Mitte ausrichtet.

Wenn man in Android zunächst eine Tabelle erstellt, dann werden immer die View-Elemente innerhalb einer Zelle nur zur Linken Seite orientiert dargestellt

 

Der Grund hierfür ist, dass eine eingebettetes TextView Element in einer TableRow immer zunächst im WRAP Modus eingefügt, wird, das heißt, es ist nur so lange, wie der Text selber ist.

Deshalb muss man wie im Design-Layout dafür sorgen, dass das innere Element in einer Zelle automatisch so breit erzeugt wird, wie das umfassende Zellen-Element.

 

Lösung:

Deshalb muss man eine Inneren View-Element immer mit dem LayoutParameter die Darstellung zur Laufzeit zuordnen

TableRow.LayoutParams lpMatchWidth = new TableRow.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT,1);


lblMonth_Text.setLayoutParams(lpMatchWidth);

 

 

 

Volle Breite anpassen

Mit Layout_Parameter: MATCH_PARENT

Damit sich das Attribut Ausrichtung zu CENTER oder CENTER_HORIZONTAL auswirken kann, muss das View-Element auch eine volle Breite haben.

Hierzu muss man dem TextView über LayoutParameter in der Breite MATCH_Parent zuweisen.

 

TextView lblMonth_Text = new TextView(this);
lblMonth_Text.setText(sMonth);   

lblMonth_Text.setGravity(Gravity.CENTER);
//<

TableRow.LayoutParams lpMatchWidth = new TableRow.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT,1);


lblMonth_Text.setLayoutParams(lpMatchWidth);

 

 

TableRow.LayoutParams lpMatchWidth = new TableRow.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT,1);
lblMonth_Year.setLayoutParams(lpMatchWidth);
rowHeader.addView(lblMonth_Year);
tblHeader.addView(rowHeader);

panel_Month.addView(tblHeader);
//</ Header1 >

//< Header2 >
//scroller_Vertical.setMinimumWidth(500);
TableLayout tblHeader2 = new TableLayout(this);
tblHeader2.setLayoutParams(layout_Table);

TableRow rowHeader2 =
new TableRow(this);
rowHeader2.setBackgroundColor(Color.
BLACK);

SimpleDateFormat fmtMonth=
new SimpleDateFormat("MMM");
String sMonth=fmtMonth.format(dtMonth);

TextView lblMonth_Text =
new TextView(this);
lblMonth_Text.setText(sMonth);   
//*cast integer to string
lblMonth_Text.setTextColor(Color.WHITE);
lblMonth_Text.setGravity(Gravity.
CENTER);
lblMonth_Text.setLayoutParams(lpMatchWidth);
lblMonth_Text.setBackgroundColor(Color.
BLACK);
rowHeader2.addView(lblMonth_Text);
tblHeader2.addView(rowHeader2);


panel_Month.addView(tblHeader2);

 

 

 

 

 

 

Referenz-Code

Kompletter Code-Block

Date dtMonth = clsDate.getDate_by_Year_Month_Day(Calendar_Year, Calendar_Month, 1);

LinearLayout stack_Horizontal = findViewById(R.id.
stack_Horizontal);

LinearLayout panel_Month=
new LinearLayout(this);
panel_Month.setOrientation(LinearLayout.
VERTICAL );
LinearLayout.LayoutParams lpTable=
new LinearLayout.LayoutParams(_intTableWidth,ViewGroup.LayoutParams.WRAP_CONTENT);
panel_Month.setLayoutParams(lpTable);

TableLayout tblHeader =
new TableLayout(this);
TableLayout.LayoutParams layout_Table=
new TableLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,ViewGroup.LayoutParams.WRAP_CONTENT);
tblHeader.setBackgroundColor(Color.rgb(
50,50,50));
tblHeader.setLayoutParams(layout_Table);

//< Header1 >
TableRow rowHeader = new TableRow(this);
rowHeader.setBackgroundColor(Color.
GRAY);
rowHeader.setBackground(ContextCompat.getDrawable(
context, R.drawable.border));


TextView lblMonth_Year =
new TextView(this);
lblMonth_Year.setText(String.valueOf(Calendar_Year) );   
//*cast integer to string
lblMonth_Year.setTextColor(Color.BLACK);
lblMonth_Year.setBackgroundColor(Color.
YELLOW);
lblMonth_Year.setGravity(Gravity.
CENTER_HORIZONTAL);
TableRow.LayoutParams lpMatchWidth =
new TableRow.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT,1);
lblMonth_Year.setLayoutParams(lpMatchWidth);
rowHeader.addView(lblMonth_Year);
tblHeader.addView(rowHeader);

panel_Month.addView(tblHeader);
//</ Header1 >

//< Header2 >
//scroller_Vertical.setMinimumWidth(500);
TableLayout tblHeader2 = new TableLayout(this);
tblHeader2.setLayoutParams(layout_Table);

TableRow rowHeader2 =
new TableRow(this);
rowHeader2.setBackgroundColor(Color.
BLACK);

SimpleDateFormat fmtMonth=
new SimpleDateFormat("MMM");
String sMonth=fmtMonth.format(dtMonth);

TextView lblMonth_Text =
new TextView(this);
lblMonth_Text.setText(sMonth);   
//*cast integer to string
lblMonth_Text.setTextColor(Color.WHITE);
lblMonth_Text.setGravity(Gravity.
CENTER);
lblMonth_Text.setLayoutParams(lpMatchWidth);
lblMonth_Text.setBackgroundColor(Color.
BLACK);
rowHeader2.addView(lblMonth_Text);
tblHeader2.addView(rowHeader2);


panel_Month.addView(tblHeader2);
//</ Header2 >

 

 

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Android TextView in Table ausrichten

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