TableRowが画面の中央に表示されないのはなぜですか？

Question

私はこのコードでのTableRowは、上の代わりの左中央

HorizontalScrollView HSC = new HorizontalScrollView(this); 
ScrollView VSC = new ScrollView(this); 
HSC.setBackgroundResource(R.drawable.lavagna); 
tableLayout = new TableLayout(this); 
tableLayout.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT)); 
tableLayout.setGravity(Gravity.CENTER) 
for (int i = 0; i < 3; i++){ 
tableRow = new TableRow(this); 
tableRow.setGravity(Gravity.CENTER); 
for (int j = 0; j < 3; j++){ 
values[i][j] = new EditText(this); 
values[i][j].setHint("r: " + (i) + " " + "c: " + (j)); 
values[i][j].setPadding(10, 10, 10, 10); 
tableRow.addView(values[i][j]); 
} 
tableLayout.addView(tableRow); 
} 
VSC.addView(tableLayout); 
HSC.addView(VSC); 
setContentView(HSC); 
} 

Answer 1

HorizontalScrollView HSC = new HorizontalScrollView(this); 
ScrollView VSC = new ScrollView(this); 
VSC.setLayoutParams(new FrameLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT, Gravity.CENTER));   
HSC.setBackgroundResource(R.drawable.lavagna);   
tableLayout = new TableLayout(this); 
tableLayout.setLayoutParams(new FrameLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT, Gravity.CENTER)); 
values = new EditText[15][15]; 
for (int i = 0; i < 15; i++){   
tableRow = new TableRow(this); 
tableRow.setGravity(Gravity.CENTER); 
for (int j = 0; j < 15; j++){ 
values[i][j] = new EditText(this); 
valo[i][j].setInputType(InputType.TYPE_CLASS_NUMBER | InputType.TYPE_NUMBER_FLAG_SIGNED | InputType.TYPE_NUMBER_FLAG_DECIMAL); 
values[i][j].setHint("r: " + (i) + " " + "c: " + (j)); 
values[i][j].setPadding(10, 10, 10, 10); 
tableRow.addView(valore[i][j]); 
} 
VSC.addView(tableLayout); 
HSC.addView(VSC); 
setContentView(HSC);   

Answer 2

に表示されます。なぜ、私はtableLayoutオブジェクトを初期化した後、あなたはまた、そのレイアウトパラメータを定義するべきだと思います理解していません。

tableLayout.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, 
    LayoutParams.WRAP_CONTENT));