下面是一个例子完全编程:
- 初始化一个微调。
- 通过字符串列表填充数据。
- 调整微调器的大小并将其添加到我的视图。
- 格式化Spinner字体(字体大小,颜色,填充)。
- 清除微调。
- 向Spinner添加新值。
- 重绘Spinner。
我使用下面的类瓦尔:
Spinner varSpinner;
List<String> varSpinnerData;
float varScaleX;
float varScaleY;
A - 初始化并渲染微调(varRoot是指向我的主要活动):
public void renderSpinner() {
List<String> myArraySpinner = new ArrayList<String>();
myArraySpinner.add("red");
myArraySpinner.add("green");
myArraySpinner.add("blue");
varSpinnerData = myArraySpinner;
Spinner mySpinner = new Spinner(varRoot);
varSpinner = mySpinner;
ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(varRoot, android.R.layout.simple_spinner_item, myArraySpinner);
spinnerArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); // The drop down vieww
mySpinner.setAdapter(spinnerArrayAdapter);
乙 - 调整和将Spinner添加到我的视图中:
FrameLayout.LayoutParams myParamsLayout = new FrameLayout.LayoutParams(
FrameLayout.LayoutParams.MATCH_PARENT,
FrameLayout.LayoutParams.WRAP_CONTENT);
myParamsLayout.gravity = Gravity.NO_GRAVITY;
myParamsLayout.leftMargin = (int) (100 * varScaleX);
myParamsLayout.topMargin = (int) (350 * varScaleY);
myParamsLayout.width = (int) (300 * varScaleX);;
myParamsLayout.height = (int) (60 * varScaleY);;
varLayoutECommerce_Dialogue.addView(mySpinner, myParamsLayout);
C - Make the Clic k处理程序并使用它来设置字体。
mySpinner.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int myPosition, long myID) {
Log.i("renderSpinner -> ", "onItemSelected: " + myPosition + "/" + myID);
((TextView) parentView.getChildAt(0)).setTextColor(Color.GREEN);
((TextView) parentView.getChildAt(0)).setTextSize(TypedValue.COMPLEX_UNIT_PX, (int) (varScaleY * 22.0f));
((TextView) parentView.getChildAt(0)).setPadding(1,1,1,1);
}
@Override
public void onNothingSelected(AdapterView<?> parentView) {
// your code here
}
});
}
d - 更新微调用新的数据:
private void updateInitSpinners(){
String mySelected = varSpinner.getSelectedItem().toString();
Log.i("TPRenderECommerce_Dialogue -> ", "updateInitSpinners -> mySelected: " + mySelected);
varSpinnerData.clear();
varSpinnerData.add("Hello World");
varSpinnerData.add("Hello World 2");
((BaseAdapter) varSpinner.getAdapter()).notifyDataSetChanged();
varSpinner.invalidate();
varSpinner.setSelection(1);
}
}
我一直没能在updateInitSpinners解决,就是做varSpinner.setSelection(0);并自动激活自定义字体设置。
UPDATE:
此 “丑” 解决方案解决了varSpinner.setSelection(0);的问题,但我不是很满意:
private void updateInitSpinners(){
String mySelected = varSpinner.getSelectedItem().toString();
Log.i("TPRenderECommerce_Dialogue -> ", "updateInitSpinners -> mySelected: " + mySelected);
varSpinnerData.clear();
ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(varRoot, android.R.layout.simple_spinner_item, varSpinnerData);
spinnerArrayAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
varSpinner.setAdapter(spinnerArrayAdapter);
varSpinnerData.add("Hello World");
varSpinnerData.add("Hello World 2");
((BaseAdapter) varSpinner.getAdapter()).notifyDataSetChanged();
varSpinner.invalidate();
varSpinner.setSelection(0);
}
}
希望这有助于......